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I am making an attendance system where I take the attendance using RadioGroup with two options. When I select some radio button and scroll down some other radio button gets auto-selected. If I change them upper ones also get changed.
Main class
public class TeacherAttendanceActivity extends AppCompatActivity implements AttendanceAdapter.AttendanceAdapterListner {
public static TeacherAttendanceActivity teacherAttendanceActivity;
private static final String TAG = TeacherAttendanceActivity.class.getSimpleName();
List<AttendanceModel> listItems;
private RecyclerView recyclerView;
private RecyclerView.Adapter adapter;
private AttendanceAdapter attendanceAdapter;
ProgressDialog progressDialog;
private SQLiteHandler db;
private SessionManager session;
private SearchView searchView;
Button btnSubmit;
JSONObject mainObj = new JSONObject();
// date
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
String currentDateandTime = sdf.format(new Date());
String class_id,title;
Boolean Error;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_teacher_attendance);
//get data from intent
class_id = super.getIntent().getExtras().getString("id"); //class_id
title = super.getIntent().getExtras().getString("title");
getSupportActionBar().setTitle("Class: "+title+", Date: "+currentDateandTime );
// SqLite database handler
db = new SQLiteHandler(getApplicationContext());
// session manager
session = new SessionManager(getApplicationContext());
btnSubmit=findViewById(R.id.buttonAttendanceSubmit);
btnSubmit.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Error=false;
Gson gson=new Gson();
final String newDataArray=gson.toJson(listItems); // dataarray is list aaray
for (int i = 0; i < AttendanceAdapter.listItems.size(); i++){
if(AttendanceAdapter.listItems.get(i).getAttendance()==null){
Toast.makeText(TeacherAttendanceActivity.this, "Check attendance at roll:"+AttendanceAdapter.listItems.get(i).getRoll(), Toast.LENGTH_SHORT).show();
Error =true;
break;
}
}
if (!Error){
request(class_id,currentDateandTime,newDataArray);
}
}
});
listItems = new ArrayList<>();
attendanceAdapter = new AttendanceAdapter(listItems, this, (AttendanceAdapter.AttendanceAdapterListner) this);
recyclerView = (RecyclerView) findViewById(R.id.list_attendance);
recyclerView.setLayoutManager(new LinearLayoutManager(TeacherAttendanceActivity.this));
progressDialog = new ProgressDialog(this);
teacherAttendanceActivity = this;
//refresh_list(class_id);
}
#Override
protected void onStart() {
refresh_list(class_id);
super.onStart();
}
#Override
public void onAttendanceAdapterSelected(AttendanceModel model) {
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.refresh, menu);
getMenuInflater().inflate(R.menu.tool_bar, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
switch (id){
case R.id.action_settings:
Toast.makeText(getApplicationContext(),"Sittings",Toast.LENGTH_LONG).show();
return true;
case R.id.action_logout:
logoutUser();
return true;
case R.id.action_about:
Toast.makeText(getApplicationContext(),"About",Toast.LENGTH_LONG).show();
return true;
case R.id.action_devinfo:
Toast.makeText(getApplicationContext(),"Dev info",Toast.LENGTH_LONG).show();
return true;
case R.id.refresh:
refresh_list(class_id);
return true;
default:
return super.onOptionsItemSelected(item);
}
}
void logoutUser() {
session.setLogin(false);
db.deleteUsers();
// Launching the login activity
Intent intent = new Intent(this, MainActivity.class);
startActivity(intent);
finish();
}
// refresh list
public void refresh_list(String id) {
// this method refresh list and get the json data
listItems.clear();
// adapter = new MyAdapter(listItems,getApplicationContext());
recyclerView.setAdapter(attendanceAdapter);
recyclerView.setItemAnimator(new DefaultItemAnimator());
progressDialog.setMessage("Loading");
progressDialog.show();
StringRequest stringRequest = new StringRequest(Request.Method.GET, ApiConfig.URL_TEACHER_ATTENDANCE+id, new Response.Listener<String>() {
#Override
public void onResponse(String response) {
progressDialog.dismiss();
try {
progressDialog.hide();
JSONObject jsonObject = new JSONObject(response);
JSONArray jsonArray = jsonObject.getJSONArray("Data"); // finding data
Log.d(TAG, String.valueOf(jsonObject));
int len = jsonArray.length();
for (int i = 0; i < len; i++) {
JSONObject o = jsonArray.getJSONObject(i);
AttendanceModel item = new AttendanceModel(
o.getString("id"),
o.getString("name"),
o.getString("roll"),
o.getString("class_id"),
o.getString("status"),
null
);
listItems.add(item);
//adapter = new MyAdapter(listItems,getApplicationContext());
recyclerView.setAdapter(attendanceAdapter); // setting them in list view
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
progressDialog.hide();
Toast.makeText(TeacherAttendanceActivity.this, "Failed", Toast.LENGTH_SHORT).show();
}
}) {
/** Passing some request headers* */
#Override
public Map getHeaders() throws AuthFailureError {
SQLiteHandler db = new SQLiteHandler(getApplicationContext());
HashMap<String,String> userDetail= db.getUserDetails();
String userToken = userDetail.get("token");
Log.d(TAG, String.valueOf(userToken));
HashMap headers = new HashMap();
headers.put("Accept", "application/json");
headers.put("Authorization", "Bearer "+userToken);
return headers;
}
};
stringRequest.setShouldCache(false);
VolleyRequest.getInstance(TeacherAttendanceActivity.this).addToRequestQueue(stringRequest);
}
// take attendance
private void request( final String classId,final String date,final String data ) {
progressDialog.setMessage("Taking attendance");
showDialog();
StringRequest strReq = new StringRequest(Request.Method.POST,
ApiConfig.URL_TEACHER_ATTENDANCE_STORE, new Response.Listener<String>() {
#Override
public void onResponse(String response) {
Log.d(TAG, "Login Response: " + response);
hideDialog();
try {
JSONObject jObj = new JSONObject(response);
boolean error = jObj.getBoolean("error");
// Check for error node in json
if (!error) {
String attendance = jObj.getString("Attendance");
Toast.makeText(TeacherAttendanceActivity.this, attendance, Toast.LENGTH_LONG).show();
finish();
} else {
// Error in login. Get the error message
String errorMsg = jObj.getString("message");
Toast.makeText(TeacherAttendanceActivity.this,
errorMsg, Toast.LENGTH_LONG).show();
}
} catch (JSONException e) {
// JSON error
e.printStackTrace();
Toast.makeText(TeacherAttendanceActivity.this, "Json error: " + e.getMessage(), Toast.LENGTH_LONG).show();
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
Log.e(TAG, "Login Error: " + error.getMessage());
Toast.makeText(TeacherAttendanceActivity.this,
error.getMessage(), Toast.LENGTH_LONG).show();
hideDialog();
}
}) {
/** Passing some request headers* */
#Override
public Map getHeaders() throws AuthFailureError {
SQLiteHandler db = new SQLiteHandler(TeacherAttendanceActivity.this);
HashMap<String,String> userDetail= db.getUserDetails();
String userToken = userDetail.get("token");
Log.d(TAG, String.valueOf(userToken));
HashMap headers = new HashMap();
headers.put("Accept", "application/json");
headers.put("Authorization", "Bearer "+userToken);
return headers;
}
#Override
protected Map<String, String> getParams() {
// Posting parameters to login url
Map<String, String> params = new HashMap<String, String>();
params.put("class_id", classId);
params.put("date", date);
params.put("data", data);
return params;
}
};
strReq.setShouldCache(false);
// Adding request to request queue
VolleyRequest.getInstance(TeacherAttendanceActivity.this).addToRequestQueue(strReq);
}
private void showDialog() {
if (!progressDialog.isShowing())
progressDialog.show();
}
private void hideDialog() {
if (progressDialog.isShowing())
progressDialog.dismiss();
}
}
Model class
'model class for convenient '
public class AttendanceModel {
String id,name,roll,classId,previousAttendance,attendance;
public AttendanceModel(String id, String name,String roll, String classId,String previousAttendance,String attedance ){
this.id = id;
this.name = name;
this.classId =classId;
this.roll=roll;
this.attendance=attedance;
this.previousAttendance=previousAttendance;
}
public String getAttendance() {
return attendance;
}
public String getId() {
return id;
}
public String getName() {
return name;
}
public String getRoll() {
return roll;
}
public String getClassId() {
return classId;
}
public String getPreviousAttendance(){return previousAttendance;}
public void setId(String id) {
this.id = id;
}
public void setName(String name) {
this.name = name;
}
public void setRoll(String roll) {
this.roll = roll;
}
public void setClassId(String classId) {
this.classId = classId;
}
public void setPreviousAttendance(String previousAttendance) {
this.previousAttendance = previousAttendance;
}
public void setAttendance(String attendance) {
this.attendance = attendance;
}
}
Adapter class
' adapter class '
public class AttendanceAdapter extends RecyclerView.Adapter<AttendanceAdapter.ViewHolder> implements Filterable
{
// date
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
String currentDateandTime = sdf.format(new Date());
private static final String TAG = AttendanceAdapter.class.getSimpleName();
public static List<AttendanceModel> listItems;
private List<AttendanceModel> listItemsFiltered;
private Context context;
private ProgressDialog dialog;
private AttendanceAdapter.AttendanceAdapterListner listner;
private ProgressDialog pDialog;
private SQLiteHandler db;
public static JSONObject jo = new JSONObject();
public static JSONArray ja = new JSONArray();
public AttendanceAdapter(List<AttendanceModel> listItems, Context context, AttendanceAdapter.AttendanceAdapterListner listner) {
this.listItems = listItems;
this.listner=listner;
this.context = context;
this.listItemsFiltered =listItems;
// SqLite database handler
db = new SQLiteHandler(context);
// Progress dialog
pDialog = new ProgressDialog(context);
}
#Override
public Filter getFilter() {
return new Filter() {
#Override
protected FilterResults performFiltering(CharSequence charSequence) {
String charString = charSequence.toString();
if (charString.isEmpty()) {
listItemsFiltered = listItems;
} else {
List<AttendanceModel> filteredList = new ArrayList<>();
for (AttendanceModel row : listItems) {
// name match condition. this might differ depending on your requirement
// here we are looking for name or phone number match
if (row.getName().toUpperCase().contains(charSequence.toString().toUpperCase())||row.getName().toLowerCase().contains(charSequence.toString().toLowerCase())) {
filteredList.add(row);
}
}
listItemsFiltered = filteredList;
}
FilterResults filterResults = new FilterResults();
filterResults.values = listItemsFiltered;
return filterResults;
}
#Override
protected void publishResults(CharSequence charSequence, FilterResults filterResults) {
listItemsFiltered = (ArrayList<AttendanceModel>) filterResults.values;
notifyDataSetChanged();
}
};
}
public class ViewHolder extends RecyclerView.ViewHolder {
public TextView name;
public TextView roll;
public TextView previous;
RadioGroup radioAttendance;
RadioButton radioAttendancePresent,radioAttendanceAbsent;
public CardView card_view;
public ViewHolder(View itemView) {
super(itemView);
name= (TextView) itemView.findViewById(R.id.textViewAttendanceStudentName);
roll = (TextView) itemView.findViewById(R.id.textViewAttendanceStudentRoll);
previous = (TextView) itemView.findViewById(R.id.textViewAttendanceStudentPreviousStatus);
radioAttendance = itemView.findViewById(R.id.radioAttendance);
radioAttendancePresent =itemView.findViewById(R.id.radioAttendancePresent);
radioAttendanceAbsent =itemView.findViewById(R.id.radioAttendanceAbsent);
//card_view = (CardView) itemView.findViewById(R.id.class_card_view); // card view for on click method
itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick( View view) {
// send selected contact in callback
listner.onAttendanceAdapterSelected(listItemsFiltered.get(getAdapterPosition())); // selecting cardview and position (model)
}
});
radioAttendance.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
#Override
public void onCheckedChanged(RadioGroup radioGroup, int i) {
//Toast.makeText(TeacherAttendanceActivity.this, toString(i), Toast.LENGTH_SHORT).show();
// Toast.makeText(context,"clicked at position"+i+" "+id+""+name,Toast.LENGTH_SHORT).show();
if(radioAttendancePresent.isChecked())
{
listItems.get(getAdapterPosition()).setAttendance("present");
}
else {
listItems.get(getAdapterPosition()).setAttendance("absent");
}
}
});
}
}
#Override
public AttendanceAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.attendance_list, parent, false);
return new AttendanceAdapter.ViewHolder(v);
}
#Override
public void onBindViewHolder (final AttendanceAdapter.ViewHolder holder, final int position) {
final AttendanceModel listItem = listItemsFiltered.get(position);
holder.name.setText(listItem.getName());
holder.roll.setText(listItem.getRoll());
holder.previous.setText(listItem.getPreviousAttendance());
}
public interface AttendanceAdapterListner {
void onAttendanceAdapterSelected(AttendanceModel model); // sending cardview to say the dialoge and model for sending context
}
#Override
public int getItemCount() {
return listItemsFiltered.size();
}
private void showDialog() {
if (!pDialog.isShowing())
pDialog.show();
}
private void hideDialog() {
if (pDialog.isShowing())
pDialog.dismiss();
}
}
Your problem would be solved by making small changes to your Recycler view adapter, please do not disable recyclable property, this makes your recycler view a glorified list view.
I can see you tried using a sparse boolean array to hold the state of the radio buttons, that is good but you do not need that too. The idea behind using a Sparse boolean array is to keep the state of each item in the recycler view so that when they are recycled you still have a reference to what the state of each item is.
In your adapter you already have something that we can use to know the state, that is the attendance property of your model, in that case, you can set the state of your checkboxes by checking if the attendance property is present or absent.
One more thing about your code is that you are using the onCheckChangedListener as a click event handler for your radio button, you should not use this because it responds to all check changed events, even if it is triggered from code and not from user action, so when you bind your view and you set any of your radio buttons as checked or unchecked, it calls this callback.
Here is a modified version of your ViewHolder class that solves this issue by applying the solution above.
public class ViewHolder extends RecyclerView.ViewHolder {
public TextView name;
public TextView roll;
public TextView previous;
RadioGroup radioAttendance;
RadioButton radioAttendancePresent, radioAttendanceAbsent;
public CardView card_view;
public ViewHolder(View itemView) {
super(itemView);
name = (TextView) itemView.findViewById(R.id.textViewAttendanceStudentName);
roll = (TextView) itemView.findViewById(R.id.textViewAttendanceStudentRoll);
previous = (TextView) itemView.findViewById(R.id.textViewAttendanceStudentPreviousStatus);
radioAttendance = itemView.findViewById(R.id.radioAttendance);
radioAttendancePresent = itemView.findViewById(R.id.radioAttendancePresent);
radioAttendanceAbsent = itemView.findViewById(R.id.radioAttendanceAbsent);
radioAttendancePresent.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
radioAttendancePresent.setChecked(true);
listItems.get(getAdapterPosition()).setAttendance("present");
}
});
radioAttendanceAbsent.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
radioAttendanceAbsent.setChecked(true);
listItems.get(getAdapterPosition()).setAttendance("absent");
}
});
}
void bind(int position) {
// use the sparse boolean array to check
if (listItems.get(position).getAttendance() != null) {
if (listItems.get(position).getAttendance().equals("present")) {
radioAttendancePresent.setChecked(true);
} else if (listItems.get(position).getAttendance().equals("absent")) {
radioAttendanceAbsent.setChecked(true);
}
} else {
radioAttendance.clearCheck();
}
name.setText(listItems.get(position).getName());
roll.setText(listItems.get(position).getRoll());
previous.setText(listItems.get(position).getPreviousAttendance());
}
}
Notice that we have separate click listener for each radio button and set the state in the list of items and just check that state when we are binding, also we have removed the onCheckChangedListener and the sparse boolean array, one last thing is that we made sure that when there is not state set for the attendance property, we just clear the radio buttons so that no one is selected the code is much simpler and works correctly now.
You have to initialize your RadioButton based on model state like below:
#Override
public void onBindViewHolder (final AttendanceAdapter.ViewHolder holder, final int position) {
final AttendanceModel listItem = listItemsFiltered.get(position);
holder.name.setText(listItem.getName());
holder.roll.setText(listItem.getRoll());
holder.previous.setText(listItem.getPreviousAttendance());
final String id =listItem.getId();
final String class_id =listItem.getClassId();
holder.radioAttendance.setOnCheckedChangeListener(null);
if(listItem.getAttendance().equalsIgnoreCase("present")) {
radioAttendancePresent.setChecked(true);
} else {
radioAttendancePresent.setChecked(false);
}
//Add listener here and remove from holder
holder.radioAttendance.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
#Override
public void onCheckedChanged(RadioGroup radioGroup, int i) {
if(holder.radioAttendancePresent.isChecked()) {
listItemsFiltered.get(position).setAttendance("present");
} else {
listItemsFiltered.get(position).setAttendance("absent");
}
notifyDataSetChanged();
}
});
}
My app has an itinerary function, the part where you create a new itinerary involves selecting from 2 spinners which drop down to present different options. The data coming from MQsql database and the JSON response is correct for both sets. Currently i have been able to get either one set of the data to load in the correct spinner (being which either just transport info or attraction info but not both), or i have been able to get both sets of data to load but both are displayed in the same 2 spinners. I need them to be separated into there allocated spinners but need help doing this as i dont undertand what im doing wrong.
createItinerary class:
public class CreateItinerary extends AppCompatActivity implements AdapterView.OnItemSelectedListener {
TextView txtDate;
private Spinner spinnerAttraction;
private Spinner spinnerTransport;
// array list for spinner adapter
private ArrayList<Category> categoriesList;
ProgressDialog pDialog;
List<String> lables = new ArrayList<String>();
private ArrayList<ItineraryAdapter>Entities;
private ArrayList<ItineraryAdapter>finalEntities;
LayoutInflater myInflator;
View myView;
DBManager db;
myAdapter adapter;
String NAME;
String LOCATION;
String TIME;
static final int DIALOG_ID = 0;
int hour_x;
int min_x;
TextView TextTime;
String ItineraryName;
private String URL_ATTRACTIONS = "http://10.0.2.2/TravelApp/get_all_spinner.php";
private String URL_TRANSPORT = "http://10.0.2.2/TravelApp/get_all_transport_minor.php";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_create_itinerary);
txtDate = (TextView) findViewById(R.id.tvSelectDate);
myInflator = getLayoutInflater();
myView = myInflator.inflate(R.layout.list_create_itinerary, null);
spinnerAttraction = (Spinner) findViewById(R.id.spinnerAttraction);
spinnerTransport = (Spinner) findViewById(R.id.spinnerTransport);
db = new DBManager(this);
categoriesList = new ArrayList<Category>();
Entities = new ArrayList<ItineraryAdapter>();
finalEntities = new ArrayList<ItineraryAdapter>();
// spinner item select listener
spinnerAttraction.setOnItemSelectedListener(this);
spinnerTransport.setOnItemSelectedListener(this);
new GetAttractions().execute();
new GetTransport().execute();
showTimePickerDialog();
Bundle bundle = getIntent().getExtras();
ItineraryName = bundle.getString("Itinerary Name");
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.home_button, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if(id == R.id.go_home){
final TextView alertMessage = new TextView(this);
alertMessage.setText(" All changes will be lost are you sure you want to return back to the home page? ");
AlertDialog dialog = new AlertDialog.Builder(this)
.setTitle("Unsaved changes")
.setView(alertMessage)
.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
Intent i = new Intent(getApplicationContext(), QavelNav.class);
startActivity(i);
}
})
.setNegativeButton("No", null)
.create();
dialog.show();
}
return super.onOptionsItemSelected(item);
}
public void pickDate(View v) {
DatePickerClass datepicker = new DatePickerClass();
datepicker.setText(v);
datepicker.show(getSupportFragmentManager(), "datepicker");
System.out.println(getDate());
}
public String getDate() {
String date;
date = txtDate.getText().toString();
return date;
}
public void addAttractionToItinerary(View v){
Entities.add(new ItineraryAdapter(NAME,LOCATION,null));
loadAttractions();
System.out.println(ItineraryName);
}
public void loadAttractions(){
adapter = new myAdapter(Entities);
ListView ls = (ListView) findViewById(R.id.listCreateItinerary);
ls.setAdapter(adapter);
for(int i =0; i < finalEntities.size(); i++){
System.out.println(finalEntities.get(i).NAME + " " + finalEntities.get(i).LOCATION + " " + finalEntities.get(i).TIME);
}
}
public void onSave(View v){
ContentValues values = new ContentValues();
for(int i = 0; i <finalEntities.size();i++) {
values.put(DBManager.ColItineraryName,ItineraryName);
values.put(DBManager.ColDate,txtDate.getText().toString());
values.put(DBManager.ColName,finalEntities.get(i).NAME );
values.put(DBManager.ColLocation,finalEntities.get(i).LOCATION);
values.put(DBManager.ColTime,finalEntities.get(i).TIME);
long id = db.Insert("Itinerary",values);
if (id > 0)
Toast.makeText(getApplicationContext(),"Added to Itinerary", Toast.LENGTH_LONG).show();
else
Toast.makeText(getApplicationContext(),"cannot insert", Toast.LENGTH_LONG).show();
}
}
public void showTimePickerDialog(){
TextTime = (TextView) myView.findViewById(R.id.tvCreateItineraryTime);
TextTime.setOnClickListener(new View.OnClickListener(){
#Override
public void onClick(View v){
showDialog(DIALOG_ID);
}
});
}
#Override
protected Dialog onCreateDialog(int id){
if(id== DIALOG_ID)
return new TimePickerDialog(CreateItinerary.this,KTimePickerListner, hour_x, min_x,false);
return null;
}
protected TimePickerDialog.OnTimeSetListener KTimePickerListner = new TimePickerDialog.OnTimeSetListener(){
#Override
public void onTimeSet(TimePicker view, int hourOfDay, int minute){
hour_x = hourOfDay;
min_x = minute;
Toast.makeText(CreateItinerary.this,hour_x+" : " + min_x, Toast.LENGTH_LONG).show();
setTime(hour_x, min_x);
TIME = hour_x + ":" + min_x;
finalEntities.add(new ItineraryAdapter(NAME,LOCATION,TIME));
}
};
public void setTime(int hour, int min){
TextTime.setText(hour_x+":"+min_x);
}
#Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long l) {
Toast.makeText(
getApplicationContext(),
parent.getItemAtPosition(position).toString() + " Selected" ,
Toast.LENGTH_LONG).show();
NAME = categoriesList.get(position).getName();
LOCATION = categoriesList.get(position).getLocation();
}
#Override
public void onNothingSelected(AdapterView<?> adapterView) {
}
/**
* Adding spinner data
* */
private void populateSpinner() {
for (int i = 0; i < categoriesList.size(); i++) {
lables.add(categoriesList.get(i).getName() + " - " + categoriesList.get(i).getLocation());
}
// Creating adapter for spinner
ArrayAdapter<String> spinnerAdapter = new ArrayAdapter<String>(this,
android.R.layout.simple_spinner_item, lables);
// Drop down layout style - list view with radio button
spinnerAdapter
.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
// attaching data adapter to spinner
spinnerAttraction.setAdapter(spinnerAdapter);
spinnerTransport.setAdapter(spinnerAdapter);
}
/**
* Async task to get all food categories
* */
private class GetAttractions extends AsyncTask<Void, Void, Void> {
#Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(CreateItinerary.this);
pDialog.setMessage("Fetching attraction categories..");
pDialog.setCancelable(false);
pDialog.show();
}
#Override
protected Void doInBackground(Void... arg0) {
ServiceHandler jsonParser = new ServiceHandler();
String json = jsonParser.makeServiceCall(URL_ATTRACTIONS, ServiceHandler.GET);
Log.e("Response: ", "> " + json);
if (json != null) {
try {
JSONObject jsonObj = new JSONObject(json);
if (jsonObj != null) {
JSONArray categories = jsonObj
.getJSONArray("attraction");
for (int i = 0; i < categories.length(); i++) {
JSONObject catObj = (JSONObject) categories.get(i);
Category cat = new Category(catObj.getInt("Id"),
catObj.getString("Name"), catObj.getString("Location"));
categoriesList.add(cat);
}
}
} catch (JSONException e) {
e.printStackTrace();
}
} else {
Log.e("JSON Data", "Didn't receive any data from server!");
}
return null;
}
#Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
if (pDialog.isShowing())
pDialog.dismiss();
populateSpinner();
}
}
private class GetTransport extends AsyncTask<Void, Void, Void> {
#Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(CreateItinerary.this);
pDialog.setMessage("Fetching transport categories..");
pDialog.setCancelable(false);
pDialog.show();
}
#Override
protected Void doInBackground(Void... arg0) {
ServiceHandler jsonParser = new ServiceHandler();
String json = jsonParser.makeServiceCall(URL_TRANSPORT, ServiceHandler.GET);
Log.e("Response: ", "> " + json);
if (json != null) {
try {
JSONObject jsonObj = new JSONObject(json);
if (jsonObj != null) {
JSONArray categories = jsonObj
.getJSONArray("transport");
for (int i = 0; i < categories.length(); i++) {
JSONObject catObj = (JSONObject) categories.get(i);
Category cat = new Category(catObj.getInt("Id"),
catObj.getString("Name"), catObj.getString("Location"));
categoriesList.add(cat);
}
}
} catch (JSONException e) {
e.printStackTrace();
}
} else {
Log.e("JSON Data", "Didn't receive any data from server!");
}
return null;
}
#Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
if (pDialog.isShowing())
pDialog.dismiss();
populateSpinner();
}
}
class myAdapter extends BaseAdapter {
public ArrayList<ItineraryAdapter> listItem;
ItineraryAdapter ac;
public myAdapter(ArrayList<ItineraryAdapter> listItem) {
this.listItem = listItem;
}
#Override
public int getCount() {
return listItem.size();
}
#Override
public Object getItem(int position) {
return null;
}
#Override
public long getItemId(int position) {
return position;
}
#Override
public View getView(final int position, View view, ViewGroup viewGroup) {
ac = listItem.get(position);
TextView Name = (TextView) myView.findViewById(R.id.tvCreateItineraryName);
Name.setText(ac.NAME);
TextView Location = (TextView) myView.findViewById(R.id.tvCreateItineraryLocation);
Location.setText(ac.LOCATION);
/*
Button buttonDelete = (Button)myView.findViewById(R.id.buttonDelete);
buttonDelete.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Entities.remove(position);
finalEntities.remove(position);
loadAttractions();
}
});*/
return myView;
}
}
}
Thank you to anyone who can help me with this.
i have an activity with recyclerview that extends fragment activity.
When an item is clicked from a recyerview, i want to get the title and display it as a pop up message.
i tried several ways but noting works. cam some one help me to do this TNX.
PickupActivity
public class PickupActivity extends AppCompatActivity implements View.OnClickListener{
private Toolbar toolbar;
private navigationDrawerFragment drawerFragment;
ApplicationEnvironmentURL applicationEnvironment;
ProgressDialog pDialog;
Context context;
String BASEURL;
String FilteredData;
String AllAgents;
public String ProfileId;
public String companyId;
public String profileToken;
private com.github.clans.fab.FloatingActionButton pik_fab1;
private com.github.clans.fab.FloatingActionButton pik_fab2;
private com.github.clans.fab.FloatingActionButton pik_fab3;
private com.github.clans.fab.FloatingActionButton pik_fab4;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setTitle("Dashboard");
setContentView(R.layout.activity_pickup);
applicationEnvironment = new ApplicationEnvironmentURL(this.context);
context = this.getApplicationContext();
toolbar = (Toolbar) findViewById(R.id.app_bar_dashboard);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayShowHomeEnabled(true);
drawerFragment = (navigationDrawerFragment)
getSupportFragmentManager().findFragmentById(R.id.fragment_navigation_drawer);
drawerFragment.setup(R.id.fragment_navigation_drawer, (DrawerLayout) findViewById(R.id.drawer_layout), toolbar);
pik_fab1 = (com.github.clans.fab.FloatingActionButton) findViewById(R.id.pickup_delete);
pik_fab2 = (com.github.clans.fab.FloatingActionButton) findViewById(R.id.pickup_close);
pik_fab3 = (com.github.clans.fab.FloatingActionButton) findViewById(R.id.pickup_assignto);
pik_fab4 = (com.github.clans.fab.FloatingActionButton) findViewById(R.id.pickup_pickup);
pik_fab1.setOnClickListener(this);
pik_fab2.setOnClickListener(this);
pik_fab3.setOnClickListener(this);
pik_fab4.setOnClickListener(this);
SharedPreferences prefs = getSharedPreferences("zupportdesk", MODE_PRIVATE);
String islogged = prefs.getString("islogged", "Not defined");
String userid = prefs.getString("userid", "Not defined");
profileToken = prefs.getString("profileToken", "Not defined");
companyId = prefs.getString("companyId", "Not defined");
String companyName = prefs.getString("companyName", "Not defined");
ProfileId = prefs.getString("ProfileId", "Not defined");
Log.d("islogged : ", islogged);
Log.d("userid : ", userid);
Log.d("profileToken : ", profileToken);
Log.d("companyId : ", companyId);
Log.d("companyName : ", companyName);
Log.d("ProfileId : ", ProfileId);
getTickets(ProfileId, companyId, profileToken);
View newTicket = findViewById(R.id.newtic);
newTicket.setOnClickListener(onClickListener);
}
#Override
public void onClick(View v) {
int id = v.getId();
switch (id) {
case R.id.pickup_pickup:
Log.d("Fab_clicked", "Pickup Ticket");
pickupTicketMessage("Are you sure you want to pickup the selected tickets?", "Confirm?");
break;
case R.id.pickup_close:
Log.d("Fab_clicked", "close tickets");
closeTicketMessage("Are you sure you want to close the selected tickets?", "Confirm?");
break;
case R.id.pickup_delete:
Log.d("Fab_clicked", "close tickets");
DeleteTicketMessage("Are you sure you want to delete the selected tickets?", "Confirm?");
break;
case R.id.pickup_assignto:
Log.d("Fab_clicked", "Assign to Agent");
try {
assignTicketstMessage("Select an agent");
} catch (JSONException e) {
e.printStackTrace();
}
break;
}
}
/* Multiple Button on click event handle */
private View.OnClickListener onClickListener = new View.OnClickListener() {
#Override
public void onClick(final View v) {
switch(v.getId()){
case R.id.newtic:
// Create a login URl, before starting anything
if(isNetworkAvailable()){
Intent intentTicket = new Intent(PickupActivity.this, NewTicket.class);
startActivity(intentTicket);
} else {showErrorMessage("Please check your internet connection.", "No Connectivity!"); }
break;
}
}
};
public void getTickets(String profileId, String companyId, String profileToken) {
if (isNetworkAvailable()) {
try {
setFilteredDataURL(companyId, profileId);
FilteredData = new getFilteredData().execute(profileToken).get();
// adding the filtered data to shared preferences for further use.
//adding user data to shared preferences.
SharedPreferences.Editor editor = getSharedPreferences("zupportdesk", MODE_PRIVATE).edit();
editor.putString("FilteredData", FilteredData);
editor.commit();
Log.d("ZF-Filtered_Data", FilteredData);
setTicketsURL(profileId, companyId);
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (InterruptedException e) {
e.printStackTrace();
} catch (ExecutionException e) {
e.printStackTrace();
}
new getNewTickets().execute(profileToken);
} else {
showErrorMessage("Please check your internet connection.", "No Connectivity!");
}
}
private void PickupTicket() throws JSONException {
JSONObject jsonObject = new JSONObject();
JSONArray TicketsArray = new JSONArray();
List<Integer> selected_item = new ArrayList<>();
for (PickupTicketsItemObject ticket : PickupActivityFragment.support_ticket) {
if (ticket.isSelected()) {
selected_item.add(Integer.valueOf(ticket.getTicket_id()));
TicketsArray.put(Integer.valueOf(ticket.getTicket_id()));
}
}
Log.d("pickup_ticket_size", String.valueOf(selected_item.size()));
if(selected_item.size() < 1){
Log.d("pickup_ticket_size", "empty");
//Show Error Message
}else {
Log.d("pickup_ticket_size", "have tickets");
jsonObject.put("TicketID", TicketsArray);
jsonObject.put("ProfileId", ProfileId);
jsonObject.put("CompanyID", companyId);
setPickupTicketURI();
Log.d("ZF-PickupTicket", String.valueOf(jsonObject));
new TicketPickupRequest().execute(String.valueOf(jsonObject), profileToken);
}
}
private void showSuccessMessage(String data, String title){
new AlertDialog.Builder(this)
.setTitle(title)
.setMessage(data)
.setPositiveButton(android.R.string.yes, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// restart Activity
finish();
startActivity(getIntent());
}
})
.setIcon(R.drawable.notification_success)
.show();
}
private void assignTicketstMessage(String title) throws JSONException {
AlertDialog.Builder b = new AlertDialog.Builder(this);
b.setTitle(title);
final List<String> agentList = new ArrayList<String>();
final List<String> agentProfileIDList = new ArrayList<String>();
if(AllAgents != null && !AllAgents.isEmpty() && !AllAgents.equals("null")) {
JSONArray jsonarray = new JSONArray(AllAgents);
int count = jsonarray.length();
Log.d("Full Agents", String.valueOf(count));
for (int k = 0; k < jsonarray.length(); k++) {
JSONObject jsonobject5 = jsonarray.getJSONObject(k);
Log.d("Agent object ", String.valueOf(jsonobject5));
agentList.add(jsonobject5.getString("FirstName"));
agentProfileIDList.add(jsonobject5.getString("ProfileId"));
}
String[] types = new String[agentList.size()];
for (int j = 0; j < agentList.size(); j++) {
types[j] = agentList.get(j);
}
b.setItems(types, new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
Log.d("Selected_no ", String.valueOf(which));
Log.d("Selected_agent ", String.valueOf(agentList.get(which)));
Log.d("Selected_profile_id ", String.valueOf(agentProfileIDList.get(which)));
dialog.dismiss();
assignTicketstMessage2(String.valueOf(agentList.get(which)), String.valueOf(agentProfileIDList.get(which)));
}
});
b.show();
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
Intent i = new Intent(getApplicationContext(),Settings.class);
startActivity(i);
return true;
}
if(id == R.id.home){
NavUtils.navigateUpFromSameTask(this);
}
//noinspection SimplifiableIfStatement
if (id == R.id.notification){
Intent i = new Intent(getApplicationContext(), Notifications.class);
startActivity(i);
return true;
}
return super.onOptionsItemSelected(item);
}
private boolean isNetworkAvailable() {
ConnectivityManager connectivityManager
= (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo activeNetworkInfo = connectivityManager.getActiveNetworkInfo();
return activeNetworkInfo != null && activeNetworkInfo.isConnected();
}
private void showErrorMessage(String data, String title) {
new AlertDialog.Builder(this.context)
.setTitle(title)
.setMessage(data)
.setPositiveButton(android.R.string.yes, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
}
})
.setIcon(R.drawable.notification_red)
.show();
}
private void showErrorMessageNoInbox(String data, String title) {
new AlertDialog.Builder(this.context)
.setTitle(title)
.setMessage(data)
.setPositiveButton(android.R.string.yes, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// continue with delete
Intent i = new Intent(getApplicationContext(), Login.class);
startActivity(i);
}
})
.setIcon(R.drawable.notification_red)
.show();
}
public HttpClient getNewHttpClient() {
try {
KeyStore trustStore = KeyStore.getInstance(KeyStore.getDefaultType());
trustStore.load(null, null);
MySSLSocketFactory sf = new MySSLSocketFactory(trustStore);
sf.setHostnameVerifier(SSLSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);
HttpParams params = new BasicHttpParams();
HttpProtocolParams.setVersion(params, HttpVersion.HTTP_1_1);
HttpProtocolParams.setContentCharset(params, HTTP.UTF_8);
SchemeRegistry registry = new SchemeRegistry();
registry.register(new Scheme("http", PlainSocketFactory.getSocketFactory(), 80));
registry.register(new Scheme("https", sf, 443));
ClientConnectionManager ccm = new ThreadSafeClientConnManager(params, registry);
return new DefaultHttpClient(ccm, params);
} catch (Exception e) {
return new DefaultHttpClient();
}
}
......................... More
PickupActivityFragment
public class PickupActivityFragment extends Fragment {
public static ArrayList<PickupTicketsItemObject> support_ticket;
public static RecyclerView Ticketslist;
PickupActivity pick_up_activity;
public PickupActivityFragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
return inflater.inflate(R.layout.activity_pickup_fragment, container, false);
}
#Override
public void onViewCreated(View view, #Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
pick_up_activity = new PickupActivity();
Ticketslist = (RecyclerView) view.findViewById(R.id.pickup_list);
Ticketslist.setLayoutManager(new LinearLayoutManager(getActivity()));
Ticketslist.setHasFixedSize(true);
}
#Override
public void onActivityCreated(#Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
pick_up_activity = new PickupActivity();
}
}
PickupTicketsAdapter
public class PickupTicketsAdapter extends RecyclerView.Adapter<PickupTicketsAdapter.ViewHolder> {
ArrayList<PickupTicketsItemObject> all_tickets;
public PickupTicketsAdapter(List<PickupTicketsItemObject> tickets) {
this.all_tickets = new ArrayList<>(tickets);
}
#Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.custom_pick_tickets, parent, false);
return new ViewHolder(v);
}
#Override
public void onBindViewHolder(final ViewHolder holder, int position) {
holder.bindData(all_tickets.get(position));
//in some cases, it will prevent unwanted situations
holder.checkbox.setOnCheckedChangeListener(null);
//if true, your checkbox will be selected, else unselected
holder.checkbox.setChecked(all_tickets.get(position).isSelected());
holder.checkbox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
#Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
all_tickets.get(holder.getAdapterPosition()).setSelected(isChecked);
}
});
}
#Override
public int getItemCount() {
return all_tickets.size();
}
// Provide a reference to the views for each data item
// Complex data items may need more than one view per item, and
// you provide access to all the views for a data item in a view holder
public static class ViewHolder extends RecyclerView.ViewHolder {
// each data item is just a string in this case
public ImageView priority;
public TextView sts_open;
public TextView sts_overdue;
public TextView tkt_from;
public TextView tkt_subject;
public TextView tkt_assignedto;
public TextView tkt_created_date;
public TextView txt_ticket_id;
public CheckBox checkbox;
public ViewHolder(View v) {
super(v);
checkbox = (CheckBox) v.findViewById(R.id.pick_checkbox);
priority = (ImageView) v.findViewById(R.id.priority_status_icon);
sts_open= (TextView) v.findViewById(R.id.tv_Tk_opn_status);
sts_overdue = (TextView) v.findViewById(R.id.tv_Tk_overdue);
tkt_from = (TextView) v.findViewById(R.id.tv_Tk_from);
tkt_subject = (TextView) v.findViewById(R.id.tv_Tk_subject);
tkt_assignedto = (TextView) v.findViewById(R.id.tv_Tk_Assignedto);
tkt_created_date = (TextView) v.findViewById(R.id.tv_Tk_Created_date);
txt_ticket_id = (TextView) v.findViewById(R.id.tv_Tk_TicketID);
}
public void bindData(PickupTicketsItemObject ticket) {
priority.setImageResource(ticket.getStatus_priority());
sts_open.setText(ticket.getStatus_open());
sts_overdue.setText(ticket.getStatus_overdue());
tkt_from.setText(ticket.getTicket_from());
tkt_subject.setText(ticket.getTicket_subject());
tkt_assignedto.setText(ticket.getTicket_assignedto());
tkt_created_date.setText(ticket.getTicket_created_date());
txt_ticket_id.setText(ticket.getTicket_id());
}
}
}
PickupTicketsItemObject
public class PickupTicketsItemObject {
private int status_priority;
private String status_open;
private String status_overdue;
private String ticket_from;
private String ticket_subject;
private String ticket_assignedto;
private String ticket_created_date;
private String ticket_id;
private boolean isSelected;
public PickupTicketsItemObject(){
}
public int getStatus_priority() {
return status_priority;
}
public String getStatus_open() {
return status_open;
}
public String getStatus_overdue() {
return status_overdue;
}
public String getTicket_from() {
return ticket_from;
}
public String getTicket_subject() {
return ticket_subject;
}
public String getTicket_assignedto() {
return ticket_assignedto;
}
public String getTicket_created_date(){return ticket_created_date;}
public String getTicket_id(){return ticket_id;}
public boolean isSelected() {
return isSelected;
}
public void setSelected(boolean selected) {
isSelected = selected;
}
public void setStatus_priority(int status_priority) {
this.status_priority = status_priority;
}
public void setStatus_open(String status_open) {
this.status_open = status_open;
}
public void setStatus_overdue(String status_overdue) {
this.status_overdue = status_overdue;
}
public void setTicket_from(String ticket_from) {
this.ticket_from = ticket_from;
}
public void setTicket_subject(String ticket_subject) {
this.ticket_subject = ticket_subject;
}
public void setTicket_assignedto(String ticket_assignedto) {
this.ticket_assignedto = ticket_assignedto;
}
public void setTicket_created_date(String ticket_created_date) {
this.ticket_created_date = ticket_created_date;
}
public void setTicket_id(String ticket_id) {
this.ticket_id = ticket_id;
}
}
public void onBindViewHolder(.....)
for particular TextView and use AlertDialog to show message inside adapter.
All you need to do is make changes in your adapter class
In your ViewHolder class, declare a CardView object as well.
Then in the onBindViewHolder method you can set the holder.cardview.onClickListener
You can use alert dialog builder for showing popups
So I manage to show my list of categories on button click which starts new activity and shows my list. The thing is when I implement onItemClick listener and Toast some data that works or start new activity and display some id in TextView-->works
but when i create a new ListView and even do everything same app crashes.. there are several json files and they are structured: url: http/......com/id so this id presents id of next url json file ->subcategory of present category what am I doing wrong?
MainActivity - getting json file
public class MainActivity extends AppCompatActivity {
String json_string;
String urlEnd;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ActionBar actionBar = getSupportActionBar();
actionBar.setDisplayShowHomeEnabled(true);
actionBar.setIcon(R.mipmap.full_logo);
TextView t2 = (TextView) findViewById(R.id.forgot_password_link);
t2.setMovementMethod(LinkMovementMethod.getInstance());
getJson("1");
}
public String setUrl(String importantNumber){
String json_url;
json_url = "http://...." + importantNumber;
return json_url;
}
public void getJson(String idkategorije){
new BackgroundTask(idkategorije).execute();
}
class BackgroundTask extends AsyncTask<Void, Void, String> {
private final String idkategorije;
String json_url;
String line;
public BackgroundTask(String idkategorije) {
this.idkategorije = idkategorije;
}
#Override
protected void onPreExecute() {
json_url = setUrl(idkategorije);
}
#Override
protected String doInBackground(Void... voids) {
try{
URL url = new URL(json_url);
HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();
httpURLConnection.connect();
InputStream inputStream = httpURLConnection.getInputStream();
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
StringBuilder stringBuilder = new StringBuilder();
while ((line = bufferedReader.readLine()) != null){
stringBuilder.append(line);
}
bufferedReader.close();
inputStream.close();
httpURLConnection.disconnect();
return stringBuilder.toString().trim();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
#Override
protected void onProgressUpdate(Void... values) {
super.onProgressUpdate(values);
}
#Override
protected void onPostExecute(String result) {
json_string = result;
}
}
public void parseJSON(View view){
if (json_string == null){
Toast.makeText(getApplicationContext(), "GetJson", Toast.LENGTH_SHORT).show();
}else{
Intent intent = new Intent(this, DisplayListView.class);
intent.putExtra("json_data", json_string);
startActivity(intent);
}
}
public void forgotPassword(View view) {
//specify an intent --> directs to new activity --> ForgotPassword.class
Intent startForgotPassActivity = new Intent(this, ForgotPassword.class);
startActivity(startForgotPassActivity);
}
public void registration(View view) {
Intent registrationActivity = new Intent(this, registration.class);
startActivity(registrationActivity);
}
public void addfile(View view) {
Intent addfileActivity = new Intent(this, Addfile.class);
startActivity(addfileActivity);
}
public void login(View view) {
Intent loginActivity = new Intent(this, login.class);
startActivity(loginActivity);
}
public void Searchme(View view) {
EditText searchInput = (EditText)findViewById(R.id.id_search_input);
String searchString = searchInput.getText().toString(); //URL nastavak
Intent searchActivity = new Intent(this, search.class);
searchActivity.putExtra("url",searchString);
startActivity(searchActivity);
}
}
working DisplayListView.java
public class DisplayListView extends AppCompatActivity {
String json_string;
JSONArray jsonArray;
CategoryAdapter categoryAdapter;
ListView listView;
String prosljedeni;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_display_list_view);
ActionBar actionBar = getSupportActionBar();
actionBar.setDisplayShowHomeEnabled(true);
actionBar.setIcon(R.mipmap.full_logo);
listView = (ListView) findViewById(R.id.listview);
categoryAdapter = new CategoryAdapter(this, R.layout.row_layout);
listView.setAdapter(categoryAdapter);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id){
Categories categories = (Categories) categoryAdapter.getItem(position);
String idkat = categories.getId(); //dohvati id imena reda
Toast.makeText(getApplicationContext(), idkat, Toast.LENGTH_SHORT).show();
//MainActivity mm = new MainActivity();
//mm.new BackgroundTask(idkat).execute();
Intent intent = new Intent(DisplayListView.this, SubCategory.class);
intent.putExtra("idkat",idkat);
startActivity(intent);
}
});
json_string = getIntent().getExtras().getString("json_data");
//inicjalizacija jsonObject
try {
//jsonObject = new JSONObject(json_string); //starts with [ not {
jsonArray = new JSONArray(json_string); //get the array
int count = 0;
String name;
String urlFromJ;
String parentId;
String idKategorije;
while (count < jsonArray.length()) {
JSONObject JO = jsonArray.getJSONObject(count);
idKategorije = JO.getString("id");
parentId = JO.getString("parent_id");
name = JO.getString("name");
urlFromJ = JO.getString("url");
Categories categories = new Categories(idKategorije, parentId, name, urlFromJ);
categoryAdapter.add(categories);
count++;
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}
My adapter..CategoryAdapter
public class CategoryAdapter extends ArrayAdapter {
List list = new ArrayList();
public CategoryAdapter(Context context, int resource) {
super(context, resource);
}
public void add(Categories object) {
super.add(object);
list.add(object);
}
#Override
public int getCount() {
return list.size();
}
#Nullable
#Override
public Object getItem(int position) {
return list.get(position);
}
#NonNull
#Override
public View getView(int position, View convertView, ViewGroup parent) {
View row;
row = convertView;
CategoryHolder categoryHolder;
if (row == null){
LayoutInflater layoutInflater = (LayoutInflater) this.getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
row = layoutInflater.inflate(R.layout.row_layout, parent, false);
categoryHolder = new CategoryHolder();
categoryHolder.tx_name = (TextView) row.findViewById(R.id.tx_name);
row.setTag(categoryHolder);
}else {
categoryHolder = (CategoryHolder) row.getTag();
}
//set resources for Views
Categories categories = (Categories) this.getItem(position);
//set resource for category holder
categoryHolder.tx_name.setText(categories.getName());
//categoryHolder.tx_name.setText(categories.getUrlFromJson());
return row;
}
static class CategoryHolder{
TextView tx_name;
}
}
Categories.java - getters and setters
public class Categories {
private String name;
private String urlFromJson;
private String parentId;
private String id;
public Categories(String id, String parentId, String name, String urlFromJson) {
this.id = id;
this.parentId = parentId;
this.name = name;
this.urlFromJson = urlFromJson;
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getUrlFromJson() {
return urlFromJson;
}
public void setUrlFromJson(String urlFromJson) {
this.urlFromJson = urlFromJson;
}
public String getParentId() {
return parentId;
}
public void setParentId(String parentId) {
this.parentId = parentId;
}
}
log error
FATAL EXCEPTION: main
Process: hr.oglasnik.perhpethua.oo, PID: 24222
java.lang.RuntimeException: Unable to start activity ComponentInfo{hr.oglasnik.perhpethua.oo/hr.oglasnik.perhpethua.oo.SubCategory}: java.lang.NullPointerException
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2439)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2495)
at android.app.ActivityThread.access$800(ActivityThread.java:153)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1349)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:157)
at android.app.ActivityThread.main(ActivityThread.java:5633)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:896)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:712)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NullPointerException
at org.json.JSONTokener.nextCleanInternal(JSONTokener.java:116)
at org.json.JSONTokener.nextValue(JSONTokener.java:94)
at org.json.JSONArray.<init>(JSONArray.java:92)
at org.json.JSONArray.<init>(JSONArray.java:108)
at hr.oglasnik.perhpethua.oo.SubCategory.onCreate(SubCategory.java:69)
at android.app.Activity.performCreate(Activity.java:5312)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1111)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2395)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2495)
at android.app.ActivityThread.access$800(ActivityThread.java:153)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1349)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:157)
at android.app.ActivityThread.main(ActivityThread.java:5633)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:896)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:712)
at dalvik.system.NativeStart.main(Native Method)
I am building an app for Udacity called popular movies app which will fetch movies info from movieDB and display posters in the first activity than if the user clicked any poster it will take him to detailActivity where all the Movie detail will be displayed.
Now I am done with stage 1, stage 2 I am supposed to give the user the ability to make a favorite movie list which will be displayed in the first activity and deatilActivity and will be fetched from and to a database.
I already created the database and I have data saved there but I do not no how to retrieve it and display it to user kindly help me to do it.
below is my code:
First Activity the gridView for posters:
public class PhotoGrid extends Fragment {
//Create a string array variable for every item that we are going to recive from
// the movieDB
String[] movieId, movieTitle, movieReleaseDate, movieVoteAverage, movieOverview, moviePosterPath;
//use string1 to attach the poster path for every poster with the url so we can call the image
static String[] string1;
// define gridView here so we can use it in onPostexecute()
GridView gridView;
//movieUrl is used for the sortby setting
String movieUrl;
SQLiteDatabase db;
databaseHelper databaseHelper;
Cursor cursor;
ContentProvider contentProvider;
public PhotoGrid() {
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Add this line in order for this fragment to handle menu events.
setHasOptionsMenu(true);
}
#Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
inflater.inflate(R.menu.menu, menu);
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_refresh) {
updateMovie();
return true;
} else if (id == R.id.action_settings) {
//if action_setting clicked SettingActivity will start
Intent intent = new Intent(getActivity(), SettingActivity.class);
startActivity(intent);
return true;
}
return super.onOptionsItemSelected(item);
}
public void updateMovie() {
FetchMoviesPosters movieTask = new FetchMoviesPosters();
//make popularity as the default order or call for movieposters in settings
SharedPreferences sharedPreferences = PreferenceManager
.getDefaultSharedPreferences(getActivity());
String sortBy = sharedPreferences.getString(getString(R.string.pref_sortby_key),
getString(R.string.pref_sortby_default));
movieTask.execute(sortBy);
}
#Override
public void onStart() {
super.onStart();
//update movies list on start
updateMovie();
}
#Override
public View onCreateView(final LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
final View rootView = inflater.inflate(R.layout.fragment_photo_grid, container, false);
databaseHelper = new databaseHelper(getActivity(),MovieContract.MovieEntry.TABLE_NAME,null,2);
db = databaseHelper.getReadableDatabase();
gridView = (GridView) rootView.findViewById(R.id.grid_view);
updateMovie();
gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
//Here handle the on poster click action by assigning the clicked poster info
//to strings and send them to detail activity with different keys to be able to
// control each item alone
String movieIDText = movieId[i];
String movieTitleText = movieTitle[i];
String movieOverViewText = movieOverview[i];
String movieReleaseDateText = movieReleaseDate[i];
String movieRatingText = movieVoteAverage[i];
String movieDetailImage = moviePosterPath[i];
Intent intent = new Intent(getActivity(), DetailActivity.class);
intent.putExtra("movie_id", movieIDText);
intent.putExtra("movie_overview", movieOverViewText);
intent.putExtra("movie_title", movieTitleText);
intent.putExtra("movie_release_date", movieReleaseDateText);
intent.putExtra("movie_rating", movieRatingText);
intent.putExtra("image_path", movieDetailImage);
startActivity(intent);
}
});
return rootView;
}
//ImageAdapter is used to control images dimensions and load them in the
// imageview using Picasso
public class ImageAdapter extends BaseAdapter {
private Context mContext;
private String[] mThumbIds;
public ImageAdapter(Context c, String[] str2) {
mContext = c;
mThumbIds = str2;
}
#Override
public int getCount() {
if (mThumbIds != null) {
return mThumbIds.length;
} else {
return 0;
}
}
#Override
public Object getItem(int position) {
return null;
}
#Override
public long getItemId(int position) {
return 0;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
ImageView imageView;
if (convertView == null) {
// if it's not recycled, initialize some attributes
imageView = new ImageView(mContext);
imageView.setLayoutParams(new GridView.LayoutParams(700, 1200));
imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
imageView.setPadding(4, 4, 4, 4);
} else {
imageView = (ImageView) convertView;
}
Picasso.with(mContext).load(mThumbIds[position]).into(imageView);
return imageView;
}
}
public class FetchMoviesPosters extends AsyncTask<String, Void, String[]> {
private final String LOG_TAG = FetchMoviesPosters.class.getSimpleName();
//in this function the different order settings are defined
private String setOrder(String sortBy) {
if (sortBy.equals(getString(R.string.pref_sorting_popularity))) {
movieUrl = "https://api.themoviedb.org/3/movie/popular?";
} else if (sortBy.equals(getString(R.string.pref_sorting_highest_rating))) {
movieUrl = "https://api.themoviedb.org/3/movie/top_rated?";
}
else if (sortBy.equals(getString(R.string.pref_sorting_favorite))){
cursor = databaseHelper.retrieveData(db);
if (cursor.moveToFirst()){
do {
String id, title, overView, releaseDate, rating, posterPath;
id = cursor.getString(0);
title = cursor.getString(1);
overView = cursor.getString(2);
releaseDate = cursor.getString(3);
rating = cursor.getString(4);
posterPath = cursor.getString(5);
contentProvider = new ContentProvider(id , title , overView
, releaseDate, rating , posterPath);
}while (cursor.moveToNext());
}
}
return sortBy;
}
private String[] MoviesJasonPrase(String moviesPosterStr ) throws JSONException {
final String M_Result = "results";
final String M_ID = "id";
final String M_Title = "original_title";
final String M_Release = "release_date";
final String M_Vote = "vote_average";
final String M_OverV = "overview";
final String M_Poster = "poster_path";
JSONObject moviesJson = new JSONObject(moviesPosterStr);
JSONArray resultsArray = moviesJson.getJSONArray(M_Result);
movieId = new String[resultsArray.length()];
movieTitle = new String[resultsArray.length()];
movieReleaseDate = new String[resultsArray.length()];
movieVoteAverage = new String[resultsArray.length()];
movieOverview = new String[resultsArray.length()];
moviePosterPath = new String[resultsArray.length()];
for (int i = 0; i < resultsArray.length(); i++) {
JSONObject movie = resultsArray.getJSONObject(i);
movieId[i] = movie.getString(M_ID);
movieTitle[i] = movie.getString(M_Title);
movieReleaseDate[i] = movie.getString(M_Release);
movieVoteAverage[i] = movie.getString(M_Vote);
movieOverview[i] = movie.getString(M_OverV);
moviePosterPath[i] = movie.getString(M_Poster);
}
return moviePosterPath;
}
#Override
protected String[] doInBackground(String... params) {
if (params.length == 0) {
return null;
}
HttpURLConnection urlConnection = null;
BufferedReader reader = null;
// Will contain the raw JSON response as a string.
String moviePostersJsonStr = null;
try {
SharedPreferences sharedPreferences = PreferenceManager
.getDefaultSharedPreferences(getActivity());
String sortBy = sharedPreferences.getString(getString(R.string.pref_sortby_key),
getString(R.string.pref_sorting_popularity));
setOrder(sortBy);
final String APPID_PARAM = "api_key";
Uri builtUri = Uri.parse(movieUrl).buildUpon()
.appendQueryParameter(APPID_PARAM, BuildConfig.THE_MOVIE_DB)
.build();
URL url = new URL(builtUri.toString());
Log.v(LOG_TAG, "Built URI " + builtUri.toString());
// Create the request to TheMovieDB, and open the connection
urlConnection = (HttpURLConnection) url.openConnection();
urlConnection.setRequestMethod("GET");
urlConnection.connect();
// Read the input stream into a String
InputStream inputStream = urlConnection.getInputStream();
StringBuilder buffer = new StringBuilder();
if (inputStream == null) {
// Nothing to do.
return null;
}
reader = new BufferedReader(new InputStreamReader(inputStream));
String line;
while ((line = reader.readLine()) != null) {
buffer.append(line).append("\n");
}
if (buffer.length() == 0) {
// Stream was empty. No point in parsing.
return null;
}
moviePostersJsonStr = buffer.toString();
} catch (IOException e) {
Log.e("PhotoGrid", "Error ", e);
// If the code didn't successfully get the weather data, there's no point in attemping
// to parse it.
return null;
} finally {
if (urlConnection != null) {
urlConnection.disconnect();
}
if (reader != null) {
try {
reader.close();
} catch (final IOException e) {
Log.e("PhotoGrid", "Error closing stream", e);
}
}
}
try {
return MoviesJasonPrase(moviePostersJsonStr);
} catch (JSONException e) {
Log.e(LOG_TAG, e.getMessage(), e);
e.printStackTrace();
}
return null;
}
#Override
protected void onPostExecute(String[] Strings) {
if (Strings != null) {
string1 = new String[Strings.length];
for (int i = 0; i < Strings.length; i++) {
//receive poster images path
String[] getImage = Strings[i].split("-");
//concatenate path to url "http://image.tmdb.org/t/p/w185/"
string1[i] = "http://image.tmdb.org/t/p/w185/" + getImage[0];
}
ImageAdapter imageAdapter = new ImageAdapter(getActivity(), string1);
//put images after going though the adapter in the gridview
gridView.setAdapter(imageAdapter);
}
}
}
}
The detailActivity:
public class DetailFragment extends Fragment {
String ID;
String title;
String overView;
String releaseDate;
String rating;
String posterPath;
String movieKey;
databaseHelper myDB ;
ImageButton favorite;
public DetailFragment() {
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Add this line in order for this fragment to handle menu events.
setHasOptionsMenu(true);
}
#Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
inflater.inflate(R.menu.menu_detail, menu);
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
Intent intent = new Intent(getActivity(), SettingActivity.class);
startActivity(intent);
return true;
}
return super.onOptionsItemSelected(item);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
final View rootView = inflater.inflate(R.layout.fragment_detail, container, false);
myDB = new databaseHelper(getActivity(), MovieContract.MovieEntry.TABLE_NAME,null,2);
favorite = (ImageButton) rootView.findViewById(R.id.favorite);
final Intent intent = getActivity().getIntent();
// The detail Activity called via intent. Inspect the intent for
// movies data using movie ID.
if (intent != null && intent.hasExtra("movie_id")) {
//if true put each item in a textview and load the poster in imageView
ID = intent.getStringExtra("movie_id");
title = intent.getStringExtra("movie_title");
((TextView) rootView.findViewById(R.id.title_text))
.setText(title);
overView = intent.getStringExtra("movie_overview");
((TextView) rootView.findViewById(R.id.overview_text))
.setText(overView);
releaseDate = intent.getStringExtra("movie_release_date");
((TextView) rootView.findViewById(R.id.release_date_text))
.setText(releaseDate);
rating = intent.getStringExtra("movie_rating");
((TextView) rootView.findViewById(R.id.rating_text))
.setText(rating);
posterPath = intent.getStringExtra("image_path");
String posterImage = "http://image.tmdb.org/t/p/w185/" + posterPath;
ImageView imageView = (ImageView) rootView.findViewById(R.id.detail_image);
Picasso.with(getActivity()).load(posterImage).resize(500, 800).into(imageView);
}
Button button = (Button) rootView.findViewById(R.id.play);
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
playTrailer();
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setData(Uri.parse(String.valueOf("http://www.youtube.com/watch?v="+ movieKey)));
startActivity(intent);
}
});
Button button1 = (Button) rootView.findViewById(R.id.open_reviews);
button1.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
String id = ID;
Intent intent1 = new Intent(getActivity(), ReviewActivity.class);
intent1.putExtra("movie_id", id);
startActivity(intent1);
}
});
addData();
return rootView;
}
public void playTrailer() {
FetchMoviesTrailer fetchMoviesTrailer = new FetchMoviesTrailer();
fetchMoviesTrailer.execute(ID);
}
public void addData(){
favorite.setOnClickListener(
new View.OnClickListener() {
#Override
public void onClick(View v) {
boolean isInsearted = myDB.insert(ID, title, overView, releaseDate,
rating, posterPath);
if (isInsearted)
Toast.makeText(getActivity(),"Added to Favorite", Toast.LENGTH_SHORT)
.show();
else
Toast.makeText(getActivity(),"Not Added to Favorite", Toast.LENGTH_SHORT)
.show();
}
}
);
}
public class FetchMoviesTrailer extends AsyncTask<String, Void, String[]> {
private final String LOG_TAG = FetchMoviesTrailer.class.getSimpleName();
//in this function the different order settings are defined
private String[] MoviesJasonPrase(String moviesTrailerStr) throws JSONException {
final String T_Result = "results";
final String T_key = "key";
JSONObject moviesJson = new JSONObject(moviesTrailerStr);
JSONArray resultsArray = moviesJson.getJSONArray(T_Result);
String[] strings = new String[resultsArray.length()];
for (int i = 0; i < resultsArray.length(); i++) {
JSONObject movie = resultsArray.getJSONObject(i);
movieKey = movie.getString(T_key);
strings[i] = movieKey;
}
return strings;
}
#Override
protected String[] doInBackground(String... params) {
if (params.length == 0) {
return null;
}
HttpURLConnection urlConnection = null;
BufferedReader reader = null;
// Will contain the raw JSON response as a string.
String movieTrailerJsonStr = null;
try {
final String APPID_PARAM = "api_key";
final String Traile_Url = "http://api.themoviedb.org/3/movie/" + ID
+ "/videos?";
Uri builtUri = Uri.parse(Traile_Url).buildUpon()
.appendQueryParameter(APPID_PARAM, BuildConfig.THE_MOVIE_DB)
.build();
URL url = new URL(builtUri.toString());
Log.v(LOG_TAG, "Built URI " + builtUri.toString());
// Create the request to TheMovieDB, and open the connection
urlConnection = (HttpURLConnection) url.openConnection();
urlConnection.setRequestMethod("GET");
urlConnection.connect();
// Read the input stream into a String
InputStream inputStream = urlConnection.getInputStream();
StringBuilder buffer = new StringBuilder();
if (inputStream == null) {
// Nothing to do.
return null;
}
reader = new BufferedReader(new InputStreamReader(inputStream));
String line;
while ((line = reader.readLine()) != null) {
buffer.append(line).append("\n");
}
if (buffer.length() == 0) {
// Stream was empty. No point in parsing.
return null;
}
movieTrailerJsonStr = buffer.toString();
} catch (IOException e) {
Log.e("PhotoGrid", "Error ", e);
// If the code didn't successfully get the weather data, there's no point in attemping
// to parse it.
return null;
} finally {
if (urlConnection != null) {
urlConnection.disconnect();
}
if (reader != null) {
try {
reader.close();
} catch (final IOException e) {
Log.e("PhotoGrid", "Error closing stream", e);
}
}
}
try {
return MoviesJasonPrase(movieTrailerJsonStr);
} catch (JSONException e) {
Log.e(LOG_TAG, e.getMessage(), e);
e.printStackTrace();
}
return null;
}
#Override
protected void onPostExecute(String[] strings) {
super.onPostExecute(strings);
}
}
}
The DataBase Helper:
public class databaseHelper extends SQLiteOpenHelper{
SQLiteDatabase db ;
public static final int DATABASE_VERSION = 2;
public static final String DATABASE_NAME = "FavoriteMovies.db";
public databaseHelper(Context context, String name, SQLiteDatabase.CursorFactory factory, int version) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
#Override
public void onCreate(SQLiteDatabase db) {
final String SQL_CREATE_Movie_TABLE = "CREATE TABLE " + MovieEntry.TABLE_NAME + " (" +
MovieEntry.ID_COLUMAN + " TEXT PRIMARY KEY," +
MovieEntry.TITLE_COLUMAN + " TEXT NOT NULL, " +
MovieEntry.OVERVIEW_COLUMAN + " TEXT NOT NULL, " +
MovieEntry.RELEASE_DATE_COLUMAN + " TEXT NOT NULL, " +
MovieEntry.RATING_COLUMAN + " TEXT NOT NULL, " +
MovieEntry.POSTAR_PATH_COLUMAN+ " TEXT NOT NULL " +
" );";
db.execSQL(SQL_CREATE_Movie_TABLE);
}
#Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
db.execSQL("DROP TABLE IF EXISTS" + MovieEntry.TABLE_NAME);
onCreate(db);
}
public boolean insert(String id, String title , String overView , String date, String rating,
String poster){
db = super.getWritableDatabase();
ContentValues contentValues = new ContentValues();
contentValues.put(MovieEntry.ID_COLUMAN,id);
contentValues.put(MovieEntry.TITLE_COLUMAN,title);
contentValues.put(MovieEntry.OVERVIEW_COLUMAN,overView);
contentValues.put(MovieEntry.RELEASE_DATE_COLUMAN,date);
contentValues.put(MovieEntry.RATING_COLUMAN,rating);
contentValues.put(MovieEntry.POSTAR_PATH_COLUMAN, poster);
long isAdded = db.insert(MovieEntry.TABLE_NAME, null ,contentValues);
if (isAdded == -1) {
return false;
}
else
return true;
}
public Cursor retrieveData(SQLiteDatabase db){
Cursor cursor;
String[] projection = {MovieEntry.ID_COLUMAN, MovieEntry.TITLE_COLUMAN,
MovieEntry.OVERVIEW_COLUMAN, MovieEntry.RELEASE_DATE_COLUMAN, MovieEntry.RATING_COLUMAN,
MovieEntry.POSTAR_PATH_COLUMAN};
cursor = db.query(MovieEntry.TABLE_NAME, projection, null,null,null,null,null);
return cursor;
}
}
The DataBase Contract:
public class MovieContract {
public MovieContract(){}
public static abstract class MovieEntry implements BaseColumns{
public static final String TABLE_NAME = "favorite";
public static final String ID_COLUMAN = "ID";
public static final String TITLE_COLUMAN = "title";
public static final String OVERVIEW_COLUMAN = "overView";
public static final String RELEASE_DATE_COLUMAN = "releaseDate";
public static final String RATING_COLUMAN = "rating";
public static final String POSTAR_PATH_COLUMAN = "posterPath";
}
}
The content Provider:
public class ContentProvider {
private String id;
private String title;
private String overView;
private String releaseDate;
private String rating;
private String posterPath;
public ContentProvider(String ID, String Title,String OverView, String ReleaseDate,
String Rating, String PosterPath){
this.id = ID;
this.title = Title;
this.overView = OverView;
this.releaseDate = ReleaseDate;
this.rating = Rating;
this.posterPath = PosterPath;
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getOverView() {
return overView;
}
public void setOverView(String overView) {
this.overView = overView;
}
public String getReleaseDate() {
return releaseDate;
}
public void setReleaseDate(String releaseDate) {
this.releaseDate = releaseDate;
}
public String getRating() {
return rating;
}
public void setRating(String rating) {
this.rating = rating;
}
public String getPosterPath() {
return posterPath;
}
public void setPosterPath(String posterPath) {
this.posterPath = posterPath;
}
}
This is all covered in the Udacity course. I would suggest reviewing those videos.
However, the basic idea is that you need to create a query() method in your content provider class. The Sunshine example from Udacity looks something like this:
#Override
public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs,
String sortOrder) {
// Here's the switch statement that, given a URI, will determine what kind of request it is,
// and query the database accordingly.
Cursor retCursor;
switch (sUriMatcher.match(uri)) {
// "weather/*/*"
case WEATHER_WITH_LOCATION_AND_DATE:
{
retCursor = getWeatherByLocationSettingAndDate(uri, projection, sortOrder);
break;
}
// "weather/*"
case WEATHER_WITH_LOCATION: {
retCursor = getWeatherByLocationSetting(uri, projection, sortOrder);
break;
}
// "weather"
case WEATHER: {
retCursor = mOpenHelper.getReadableDatabase().query(
WeatherContract.WeatherEntry.TABLE_NAME,
projection,
selection,
selectionArgs,
null,
null,
sortOrder
);
break;
}
// "location"
case LOCATION: {
retCursor = mOpenHelper.getReadableDatabase().query(
WeatherContract.LocationEntry.TABLE_NAME,
projection,
selection,
selectionArgs,
null,
null,
sortOrder
);
break;
}
default:
throw new UnsupportedOperationException("Unknown uri: " + uri);
}
retCursor.setNotificationUri(getContext().getContentResolver(), uri);
return retCursor;
}
From there, if you aren't using a CursorLoader, you need to call the query method on your Content Resolver and pass in your parameters.
Here is an example from Google:
// Queries the user dictionary and returns results
mCursor = getContentResolver().query(
UserDictionary.Words.CONTENT_URI, // The content URI of the words table
mProjection, // The columns to return for each row
mSelectionClause // Selection criteria
mSelectionArgs, // Selection criteria
mSortOrder); // The sort order for the returned rows
I would also take a look at this link to read more about Content Providers.