I am using checkbox in an listview,while click the checkbox it has to select the content in the row.But is not taking taking the current position.But is not select the current positon first and second time is not selecting anything.Is not selecting the current position,Its selecting randomly.
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_list_item2);
lv =(ListView)findViewById(R.id.list);
mDbHelper = new GinfyDbAdapter(this);
share = (Button)findViewById(R.id.btnget);
btnadd1 = (Button)findViewById(R.id.btnadd);
lv = getListView();
share.setOnClickListener(new OnClickListener()
{
#Override
public void onClick(View v) {
StringBuilder result = new StringBuilder();
for(int i=0;i<mCheckStates.size();i++)
{
if(mCheckStates.get(i)==true)
{
result.append("Title:");
result.append(bb.get(i));
result.append("\n");
result.append("Content:");
result.append(aa.get(i));
result.append("\n");
}
}
// }
showAlertView(result.toString().trim());
}
});
btnadd1.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
createProject();
}
});
mDbHelper.open();
fillData();
registerForContextMenu(getListView());
}
#SuppressLint("NewApi")
#SuppressWarnings("deprecation")
private void fillData() {
mDbHelper.open();
Cursor projectsCursor = mDbHelper.fetchAllProjects();
int count = projectsCursor.getCount();
Log.i(".................",""+count);
if (projectsCursor.moveToFirst()) {
do {
int col1 = projectsCursor.getColumnIndex("title");
String title = projectsCursor.getString(col1 );
bb.add(title);
int col2 = projectsCursor.getColumnIndex("content");
String content = projectsCursor.getString(col2 );
aa.add(content);
} while (projectsCursor.moveToNext());
}
//startManagingCursor(projectsCursor);
// Create an array to specify the fields we want to display in the list (only TITLE)
String[] from = new String[]{GinfyDbAdapter.CATEGORY_COLUMN_TITLE,GinfyDbAdapter.CATEGORY_COLUMN_CONTENT,GinfyDbAdapter.CATEGORY_COLUMN_DATE};
int[] to = new int[]{R.id.text22,R.id.text11,R.id.date};
dataAdapter = new CustomAdapter (YourPrayerActivity .this, R.layout.row2, projectsCursor, from, to);
setListAdapter(dataAdapter);
EditText myFilter = (EditText) findViewById(R.id.myFilter);
myFilter.addTextChangedListener(new TextWatcher() {
public void afterTextChanged(Editable s) {
}
public void beforeTextChanged(CharSequence s, int start,
int count, int after) {
}
public void onTextChanged(CharSequence s, int start,
int before, int count) {
dataAdapter.getFilter().filter(s.toString());
}
});
dataAdapter.setFilterQueryProvider(new FilterQueryProvider() {
public Cursor runQuery(CharSequence constraint) {
return mDbHelper.fetchProjectByName(constraint.toString());
}
});
tts = new TextToSpeech(this, this);
final ListView lv = getListView();
txtText = (TextView) findViewById(R.id.text11);
lv.setTextFilterEnabled(true);
}
#Override
public void onDestroy() {
// Don't forget to shutdown tts!
if (tts != null) {
tts.stop();
tts.shutdown();
}
super.onDestroy();
}
public void onInit(int status) {
if (status == TextToSpeech.SUCCESS) {
int result = tts.setLanguage(Locale.US);
if (result == TextToSpeech.LANG_MISSING_DATA
|| result == TextToSpeech.LANG_NOT_SUPPORTED) {
Log.e("TTS", "This Language is not supported");
} else {
//btnaudioprayer.setEnabled(true);
speakOut();
}
} else {
Log.e("TTS", "Initilization Failed!");
}
}
private void createProject() {
Intent i = new Intent(this, AddyourprayerActivity.class);
startActivityForResult(i, ACTIVITY_CREATE);
}
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
super.onActivityResult(requestCode, resultCode, intent);
fillData();
}
private void speakOut() {
// String text = txtText.getText().toString();
// String text = "Android speech";
tts.speak(typed, TextToSpeech.QUEUE_FLUSH, null);
}
class CustomAdapter extends SimpleCursorAdapter implements CompoundButton.OnCheckedChangeListener {
private LayoutInflater mInflater;
private ListView lv;
#SuppressWarnings("deprecation")
public CustomAdapter(Context context, int layout, Cursor c, String[] from, int[] to)
{
super(context, layout, c, from, to);
mInflater= LayoutInflater.from(context);
mCheckStates = new SparseBooleanArray(c.getCount());
}
#Override
public void bindView(View view, Context context, final Cursor cursor){
if (view != null) {
int row_id = cursor.getColumnIndex("_id"); //Your row id (might need to replace)
TextView tv = (TextView) view.findViewById(R.id.text22);
final TextView tv1 = (TextView) view.findViewById(R.id.text11);
TextView tv2 = (TextView) view.findViewById(R.id.date);
CheckBox cb = (CheckBox) view.findViewById(R.id.checkbox);
int col1 = cursor.getColumnIndex("title");
final String title = cursor.getString(col1 );
int col2 = cursor.getColumnIndex("content");
final String content = cursor.getString(col2 );
int col3 = cursor.getColumnIndex("date");
final String date = cursor.getString(col3);
cb.setTag(cursor.getPosition());
cb.setChecked(mCheckStates.get(cursor.getPosition()+1, false));
cb.setOnCheckedChangeListener(this);
tv.setText( title);
tv1.setText( content);
tv2.setText(date);
ImageButton button = (ImageButton) view.findViewById(R.id.sms1);
button.setOnClickListener(new OnClickListener(){
#Override
public void onClick(View v){
StringBuffer sb2 = new StringBuffer();
sb2.append("Title:");
sb2.append(Html.fromHtml(title));
sb2.append(",Content:");
sb2.append(Html.fromHtml(content));
sb2.append("\n");
String strContactList1 = (sb2.toString().trim());
sendsmsdata(strContactList1);
}
});
ImageButton button1 = (ImageButton) view.findViewById(R.id.mail1);
button1.setOnClickListener(new OnClickListener(){
#Override
public void onClick(View v){
StringBuffer sb3 = new StringBuffer();
sb3.append("Title:");
sb3.append(Html.fromHtml(title));
sb3.append(",Content:");
sb3.append(Html.fromHtml(content));
sb3.append("\n");
String strContactList2 = (sb3.toString().trim());
sendmaildata(strContactList2);
}
});
ImageButton button2 = (ImageButton) view.findViewById(R.id.btnaudioprayer1);
button2.setOnClickListener(new OnClickListener(){
#Override
public void onClick(View v){
//ADD STUFF HERE you know which row is clicked. and which button
typed = content;
speakOut();
}
});
}
}
#Override
public View newView(Context context, Cursor cursor, ViewGroup parent){
LayoutInflater inflater = LayoutInflater.from(context);
View v = inflater.inflate(R.layout.row2, parent, false);
bindView(v,context,cursor);
return v;
}
public boolean isChecked(int position) {
return mCheckStates.get(position, false);
}
public void setChecked(int position, boolean isChecked) {
mCheckStates.put(position, isChecked);
}
public void toggle(int position) {
setChecked(position, !isChecked(position));
}
public void onCheckedChanged(CompoundButton buttonView,
boolean isChecked) {
// TODO Auto-generated method stub
mCheckStates.put((Integer) buttonView.getTag(), isChecked);
}
while click the checkbox,and then after have to click share button it will shows sms or email,if we click sms,in that content what are the things we checked that content has to be there in msg content.
I checked in debug,if i select the first or second row its taking or otherwise if i selected thirdrow first its not taking the content.
Have a count variable as a class member
int count;
Then in fillData
count = projectsCursor.getCount();
SO when you click on a button
StringBuilder result = new StringBuilder();
if(count>0) // check if count is greater than o
// count can be 0 if you don't select any check box
{
for(int i=0;i<count;i++)
{Log.i("checked content Inside on click of share ",""+aa.get(i));
if(mCheckStates.get(i)==true)
{
result.append("Title:");
result.append(bb.get(i));
result.append("\n");
result.append("Content:");
result.append(aa.get(i));
result.append("\n");
}
}
}
You are using a SparseBoolean array which is true for row that you check. Then you retrieve the data based on the checked items.
Here's the sample from which i picked upon
https://groups.google.com/forum/#!topic/android-developers/No0LrgJ6q2M
What you were doing is you were not going through the whole list of items to check if the checkbox was checked.
for(int i=0;i<mCheckStates.size();i++) // this was the problem
if only two items are checked you will get the first two.
To avoid the problems with CheckBoxes in a ListView you can take a Boolean array initialized false in the beginning and then making true the corresponding position in the array where checkbox is checked in the ListView.Please refer to this demo here:
Android checkbox multiselected issue
Why not you use arrayAdapter?
Have a look at this link. Hope it helps you out.
< http://androidcocktail.blogspot.in/2012/04/adding-checkboxes-to-custom-listview-in.html>
As the behavior or getview() method that it recreate view everytime whenever you scroll, so have to maintain position using setTag & getTag, even store selected checked into array with proper position.
Try below example, you can replace toggle button with check box.
Getview Method Wierd in Listview
Related
Here is a video of what I trying to do and explanation of the issue that I am having. Go to the following link below.
https://file.re/2021/09/12/2021-09-1210-43-21/
Here is the XML, Java, and Manifest Code Video. Go to the following link below.
https://file.re/2021/09/12/2021-09-1211-32-13/
Answer worked, but now I have two new problems. Here is the video link below.
https://file.re/2021/09/12/2021-09-1212-08-04/
I am creating an app that lists CardView layouts to a RecyclerView.
My app will add the CardView layout to the RecyclerView list, but it only lists one. I want it to add multiples of the same CardView when the user clicks on the button to add the card (basically cloning the CardView layout one under the other).
Here is what I have in my Button Click...
ftocConverterLabelBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
ArrayList<RecyclerItem> addFahToCelCard = new ArrayList<>();
addFahToCelCard.add(new RecyclerItem());
recyclerView = findViewById(R.id.recycler_item_view);
recyclerView.setHasFixedSize(true);
layoutManager = new LinearLayoutManager(MainActivity.this);
recyclerItemAdapter = new RecyclerItemAdapter(addFahToCelCard);
recyclerView.setLayoutManager(layoutManager);
recyclerView.setAdapter(recyclerItemAdapter);
}
}
});
I've tried putting the ArrayList<RecyclerItem> addFahToCelCard = new ArrayList<>(); under the MainActivity extends AppCompatActivity class just before the onCreate like this...
public class MainActivity extends AppCompatActivity {
final private ArrayList<RecyclerItem> addFahToCelCard = new ArrayList<>();
That didn't work.
If I don't keep ArrayList<RecyclerItem> addFahToCelCard = new ArrayList<>(); in the button click listener, and I add a new CardView it will add a new one behind the original one each time the button is clicked, and if I delete the card it keep popping back up until I delete them all off. How do I fix this the way I want it to behave? I hope this all makes sense.
I appreciate the help!
Here is everything in the java class..
public class MainActivity extends AppCompatActivity {
ArrayList<RecyclerItem> addFahToCelCard;
private Animation fromBottom;
private Animation toBottom;
private Boolean clicked = false;
private RecyclerView recyclerView;
private RecyclerItemAdapter recyclerItemAdapter;
private RecyclerView.LayoutManager layoutManager;
public FloatingActionButton mainConverterMenuFloatBtn;
public TextView chooseConverterLabel, ftocConverterLabelBtn, ftokConverterLabelBtn, ctofConverterLabelBtn, ctokConverterLabelBtn, ktofConverterLabelBtn, ktocConverterLabelBtn;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
fromBottom = AnimationUtils.loadAnimation(MainActivity.this, R.anim.from_bottom_animation);
toBottom = AnimationUtils.loadAnimation(MainActivity.this, R.anim.to_bottom_animation);
mainConverterMenuFloatBtn = findViewById(R.id.add_temp_converter_float_btn);
chooseConverterLabel = findViewById(R.id.choose_converter_label);
ftocConverterLabelBtn = findViewById(R.id.add_f_to_c_converter_label_btn);
ftokConverterLabelBtn = findViewById(R.id.add_f_to_k_converter_label_btn);
ctofConverterLabelBtn = findViewById(R.id.add_c_to_f_converter_label_btn);
ctokConverterLabelBtn = findViewById(R.id.add_c_to_k_converter_label_btn);
ktofConverterLabelBtn = findViewById(R.id.add_k_to_f_converter_label_btn);
ktocConverterLabelBtn = findViewById(R.id.add_k_to_c_converter_label_btn);
addFahToCelCard = new ArrayList<>();
recyclerView = findViewById(R.id.recycler_item_view);
recyclerView.setHasFixedSize(true);
layoutManager = new LinearLayoutManager(MainActivity.this);
recyclerItemAdapter = new RecyclerItemAdapter(addFahToCelCard);
recyclerView.setLayoutManager(layoutManager);
recyclerView.setAdapter(recyclerItemAdapter);
mainConverterMenuFloatBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
mainConverterMenu();
}
});
ftocConverterLabelBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
if (clicked) {
addFahToCelCard.add(new RecyclerItem());
recyclerItemAdapter.notifyDataSetChanged();
closeActionButton();
}
}
});
ftokConverterLabelBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
if (clicked) {
closeActionButton();
}
}
});
ctofConverterLabelBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
if (clicked) {
closeActionButton();
}
}
});
ctokConverterLabelBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
if (clicked) {
closeActionButton();
}
}
});
ktofConverterLabelBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
if (clicked) {
closeActionButton();
}
}
});
ktocConverterLabelBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
if (clicked) {
closeActionButton();
}
}
});
}
private void addFahToCelCard() {
}
private void mainConverterMenu() {
setVisibility(clicked);
setClickable(clicked);
setAnimation(clicked);
clicked = !clicked;
}
private void setVisibility(Boolean clicked) {
if (!clicked) {
chooseConverterLabel.setVisibility(View.VISIBLE);
ftocConverterLabelBtn.setVisibility(View.VISIBLE);
ftokConverterLabelBtn.setVisibility(View.VISIBLE);
ctofConverterLabelBtn.setVisibility(View.VISIBLE);
ctokConverterLabelBtn.setVisibility(View.VISIBLE);
ktofConverterLabelBtn.setVisibility(View.VISIBLE);
ktocConverterLabelBtn.setVisibility(View.VISIBLE);
} else {
chooseConverterLabel.setVisibility(View.GONE);
ftocConverterLabelBtn.setVisibility(View.GONE);
ftokConverterLabelBtn.setVisibility(View.GONE);
ctofConverterLabelBtn.setVisibility(View.GONE);
ctokConverterLabelBtn.setVisibility(View.GONE);
ktofConverterLabelBtn.setVisibility(View.GONE);
ktocConverterLabelBtn.setVisibility(View.GONE);
}
}
private void setClickable(Boolean clicked) {
if (!clicked) {
chooseConverterLabel.setClickable(true);
ftocConverterLabelBtn.setClickable(true);
ftokConverterLabelBtn.setClickable(true);
ctofConverterLabelBtn.setClickable(true);
ctokConverterLabelBtn.setClickable(true);
ktofConverterLabelBtn.setClickable(true);
ktocConverterLabelBtn.setClickable(true);
} else {
chooseConverterLabel.setClickable(false);
ftocConverterLabelBtn.setClickable(false);
ftokConverterLabelBtn.setClickable(false);
ctofConverterLabelBtn.setClickable(false);
ctokConverterLabelBtn.setClickable(false);
ktofConverterLabelBtn.setClickable(false);
ktocConverterLabelBtn.setClickable(false);
}
}
private void setAnimation(Boolean clicked) {
if (!clicked) {
chooseConverterLabel.startAnimation(fromBottom);
ftocConverterLabelBtn.startAnimation(fromBottom);
ftokConverterLabelBtn.startAnimation(fromBottom);
ctofConverterLabelBtn.startAnimation(fromBottom);
ctokConverterLabelBtn.startAnimation(fromBottom);
ktofConverterLabelBtn.startAnimation(fromBottom);
ktocConverterLabelBtn.startAnimation(fromBottom);
} else {
chooseConverterLabel.startAnimation(toBottom);
ftocConverterLabelBtn.startAnimation(toBottom);
ftokConverterLabelBtn.startAnimation(toBottom);
ctofConverterLabelBtn.startAnimation(toBottom);
ctokConverterLabelBtn.startAnimation(toBottom);
ktofConverterLabelBtn.startAnimation(toBottom);
ktocConverterLabelBtn.startAnimation(toBottom);
}
}
private void closeActionButton() {
setVisibility(clicked);
setClickable(clicked);
setAnimation(clicked);
clicked = !clicked;
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.app_menu, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(#NonNull MenuItem item) {
int id = item.getItemId();
if (id == R.id.show_hide_float_convert_btn) {
if (mainConverterMenuFloatBtn.isShown()) {
mainConverterMenuFloatBtn.setVisibility(View.GONE);
item.setIcon(R.drawable.ic_baseline_visibility_off_32);
} else if (!mainConverterMenuFloatBtn.isShown()) {
mainConverterMenuFloatBtn.setVisibility(View.VISIBLE);
item.setIcon(R.drawable.ic_baseline_visibility_32);
}
} else if (id == R.id.app_help) {
} else if (id == R.id.tip_developer) {
} else if (id == R.id.premium_features) {
} else if (id == R.id.about_app) {
} else if (id == R.id.exit_app) {
}
return super.onOptionsItemSelected(item);
}
public static class RecyclerItemAdapter extends RecyclerView.Adapter<RecyclerItemAdapter.RecyclerViewHolder> {
public ArrayList<RecyclerItem> recyclerItemList;
public AdapterView.OnItemClickListener recyclerItemListener;
public interface OnItemClickListener {
void onItemClick (int position);
}
public void setOnItemClickListener(OnItemClickListener listener) {
recyclerItemListener = (AdapterView.OnItemClickListener) listener;
}
public static class RecyclerViewHolder extends RecyclerView.ViewHolder {
EditText inputFahValueET;
TextView fahtoCelResult;
ImageView tempIconAndConvertBtn;
ImageView deleteCardBtn;
String shortResult, longResult;
public RecyclerViewHolder(#NonNull View itemView, final OnItemClickListener listener) {
super(itemView);
inputFahValueET = itemView.findViewById(R.id.input_fahrenheit_value_to_convert);
fahtoCelResult = itemView.findViewById(R.id.output_result_ftc);
tempIconAndConvertBtn = itemView.findViewById(R.id.temp_icon_convert_btn);
deleteCardBtn = itemView.findViewById(R.id.remove_card);
itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
if (listener != null) {
int position = getAdapterPosition();
if (position != RecyclerView.NO_POSITION) {
listener.onItemClick(position);
}
}
}
});
}
}
public RecyclerItemAdapter(ArrayList<RecyclerItem> rList) {
recyclerItemList = rList;
}
#NonNull
#Override
public RecyclerViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.fahrenheit_to_celsius_converter_layout, parent, false);
RecyclerViewHolder recyclerViewHolder = new RecyclerViewHolder(v, (OnItemClickListener) recyclerItemListener);
return recyclerViewHolder;
}
#Override
public void onBindViewHolder(#NonNull RecyclerViewHolder holder, int position) {
RecyclerItem currentItem = recyclerItemList.get(position);
final String[] result = new String[1];
holder.tempIconAndConvertBtn.setOnClickListener(new View.OnClickListener() {
#SuppressLint("SetTextI18n")
#Override
public void onClick(View view) {
String getIputFahValue = holder.inputFahValueET.getText().toString();
NumberFormat nf = new DecimalFormat("0.000");
if(!getIputFahValue.isEmpty()) {
double d = Double.parseDouble(getIputFahValue);
double dd = d - 32;
double ddd = dd * 5;
double dddd = ddd / 9;
result[0] = Double.toString(dddd);
holder.fahtoCelResult.setText(nf.format(dddd) + "°C");
holder.fahtoCelResult.setVisibility(View.VISIBLE);
holder.shortResult = nf.format(dddd) + "°C";
holder.longResult = getIputFahValue + "°F is " + nf.format(dddd) + "°C";
if (result[0].contains(".0")) {
result[0] = result[0].replace(".0", "");
holder.fahtoCelResult.setText(result[0] + "°C");
holder.fahtoCelResult.setVisibility(View.VISIBLE);
holder.shortResult = result[0] + "°C";
holder.longResult = getIputFahValue + "°F is " + result[0] + "°C";
}else if (result[0].contains(".000")) {
result[0] = result[0].replace(".000", "");
holder.fahtoCelResult.setText(result[0] + "°C");
holder.fahtoCelResult.setVisibility(View.VISIBLE);
holder.shortResult = result[0] + "°C";
holder.longResult = getIputFahValue + "°F is " + result[0] + "°C";
}
}else {
Toast.makeText(view.getContext(), "Fahrenheit Value Field Cannot Be Blank!", Toast.LENGTH_LONG).show();
}
}
});
holder.fahtoCelResult.setOnLongClickListener(new View.OnLongClickListener() {
#Override
public boolean onLongClick(View view) {
AlertDialog.Builder adb = new AlertDialog.Builder(view.getContext());
adb.setIcon(R.drawable.ic_baseline_file_copy_32);
adb.setTitle("Copy Result");
adb.setMessage("You can copy the result to your clipboard if you would like. Choose if you want the short or long result copied to your clipboard.\n\nExample of Short and Long Result:\nShort Result: 32°C\nLong Result: 0°F is 32°C");
adb.setPositiveButton("Short", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialogInterface, int i) {
ClipboardManager cbm = (ClipboardManager) view.getContext().getSystemService(CLIPBOARD_SERVICE);
ClipData clip = ClipData.newPlainText("Copy", holder.shortResult);
cbm.setPrimaryClip(clip);
Toast.makeText(view.getContext(), "Result Copied!", Toast.LENGTH_SHORT).show();
}
});
adb.setNegativeButton("Long", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialogInterface, int i) {
ClipboardManager cbm = (ClipboardManager) view.getContext().getSystemService(CLIPBOARD_SERVICE);
ClipData clip = ClipData.newPlainText("Copy", holder.longResult);
cbm.setPrimaryClip(clip);
Toast.makeText(view.getContext(), "Result Copied!", Toast.LENGTH_SHORT).show();
}
});
adb.setNeutralButton("Cancel", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialogInterface, int i) {}});
adb.create();
adb.show();
return false;
}
});
holder.deleteCardBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
recyclerItemList.remove(position);
notifyItemRemoved(position);
}
});
}
#Override
public int getItemCount() {
return recyclerItemList.size();
}
}
public class RecyclerItem {
public RecyclerItem() {
}
}
}
The recyclerView should be listing the CardViews and also allowing duplicates.
Well, I think you are just using the RecyclerView the wrong way.
In your code snippet, you are initializing the RecyclerView as well as the adapter and all other components every time the user clicks the button.
First of all you will have to create the insert method in the RecyclerItemAdapter class.
RecyclerItemAdapter.java
class RecyclerItemAdapter extends RecyclerView.Adapter<YourViewHolder> {
private ArrayList<RecyclerItem> items;
RecyclerItemAdapter(ArrayList<RecyclerItem> recyclerItems) {
this.items = recyclerItems;
}
//...
public void addItem(RecyclerItem item) {
items.add(item);
notifyDataSetChanged();
}
}
Then, you have ton initialize the RecyclerView only once. The best place to do that is in the onCreate method.
MainActivity.java
public class MainActivity extends AppCompatActivity {
private ArrayList<RecyclerItem> addFahToCelCard;
#Override
protected void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
addFahToCelCard = new ArrayList<>();
setupRecyclerView();
setupClickListener();
}
private void setupRecyclerView() {
recyclerView = findViewById(R.id.recycler_item_view);
recyclerItemAdapter = new RecyclerItemAdapter(addFahToCelCard);
recyclerView.setLayoutManager(new LinearLayoutManager(MainActivity.this));
recyclerView.setAdapter(recyclerItemAdapter);
}
}
Now add your onClickListener which will only add the card to the list.
private void setupClickListener() {
ftocConverterLabelBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
recyclerItemAdapter.addItem(new RecyclerItem());
}
});
}
What is your xml layout for this cardview ? It looks like this cardview is in another layout that has match parent as width and height.
If thats the case items are too big to show.
Okay so try making first reletive layout height = 100dp to match the card view in fahrenheit_to_celsius_converter_layout.xml
well I didn't understand the problem very well but from what I understood here's what you should do :
first you shouldn't be creating a new recycler view on every button click, instead you should put the code that initializes the recycler view in onCreate method that exist in the activity class and just keep a reference to the arraylist that holds the data and the adapter as global variables.
whenever the user clicks the button you should add a new item to the arraylist of data and use adapter.notifyDataItemSetChanged to tell the recycle view to check if there's any change happened to the recycle view and take action if necessary
here's a part of code that explains what I'm saying and I hope you that even if that doesn't answer your question, you catch a glimpse of how to deal with recyclerview :
first as I said you should keep a reference to the arraylist that holds the data and the adapter as global variables so put those outside any method in the activity
RecyclerItemAdapter recyclerItemAdapter ;
ArrayList <RecyclerItem>addFahToCelCard ;
and then put this code instead of the button code
addFahToCelCard = new ArrayList<>();
recyclerView = findViewById(R.id.recycler_item_view);
layoutManager = new LinearLayoutManager(MainActivity.this);
recyclerItemAdapter = new RecyclerItemAdapter(addFahToCelCard);
recyclerView.setLayoutManager(layoutManager);
recyclerView.setAdapter(recyclerItemAdapter);
ftocConverterLabelBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
addFahToCelCard.add(new RecyclerItem());
recyclerItemAdapter.notifyDataSetChanged();
}
}
});
that way whenever you want to edit the recyclerView data anytime you can add/remove items from the global arraylist and notify the adapter just like the code inside the button OnClickListener
update to the last video posted about the exception
this problem raises when you delete some items, try to use holder.getAbsoluteAdapterPosition(), instead of getAdapterPosition or the old final position value.
whenever you use a value inside a listener I guess it takes the value that exists right now and hold it as final, so if you have 5 items and deleted the first 3, the last two will still have their position stored as 4 and 5 instead of 1 and 2, thats why you should call the holder.getAbsoluteAdapterPosition() to get the current position instead of the final stored one, that way he stores the holder as final instead of storing a const int value.
**Main Activity.java**
This is main activity where I instantiate all methods/objects. Here I use Dexter library to grab files from user's external storage, then I made one method called find songs which helps in finding the path of files and list them accordingly. Then I made another method called display songs which will help in getting the whole size of songs and then display the whole list with their names accordingly. Then with the help of custom adapter I passed my list of songs which is in array named item.
public class MainActivity extends AppCompatActivity {
ListView listView;
String [] items;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
listView = findViewById(R.id.listViewSong);
runtimePermission();
}
public void runtimePermission(){
Dexter.withContext(this)
.withPermissions(Manifest.permission.READ_EXTERNAL_STORAGE,Manifest
.permissi
on.RECORD_AUDIO)
.withListener(new MultiplePermissionsListener() {
#RequiresApi(api = Build.VERSION_CODES.R)
#Override
public void
onPermissionsChecked(MultiplePermissionsReport
multiplePermissionsReport)
{
displaySongs();
}
#Override
public void
onPermissionRationaleShouldBeShown(List<PermissionRequest> list,
PermissionToken permissionToken) {
permissionToken.continuePermissionRequest();
}
}).check();
}
public ArrayList<File> findSong(File file){
ArrayList arrayList = new ArrayList();
Log.d(TAG, "findSong:"+ file.getPath());
File [] files = file.listFiles();
if (files!=null) {
Log.d(TAG, "findSong:"+ files.length);
for (File singleFile : files) {
if (singleFile.isDirectory() && !singleFile.isHidden()) {
arrayList.addAll(findSong(singleFile));
} else {
if (singleFile.getName().endsWith(".mp3") &&
!singleFile.getName().startsWith(".")) {
arrayList.add(singleFile);
}
}
}
}
return arrayList;
}
public void displaySongs(){
ArrayList<File> mySongs =
findSong(Environment.getExternalStorageDirectory());
String [] items = new String [mySongs.size()];
if(mySongs == null)return; // this is very important function
otherwise app will crash
for (int i=0; i<mySongs.size(); i++){
items[i] = mySongs.get(i).getName().replace(".mp3",
"");
}
Log.d(TAG, "displaySongs:"+ items.length);
(this,
android.R.layout.simple_list_item_1,items);
CustomAdapter customAdapter = new CustomAdapter(this,
Arrays.asList(items));
Log.d(TAG, "displaySongs:"+ customAdapter.getCount());
listView.setAdapter(customAdapter);
listView.setOnItemClickListener(new
AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int
position, long id) {
String currentSong = (String)
listView.getItemAtPosition(position);
startActivity(new Intent(getApplicationContext(),
PlayerActivity.class)
.putExtra("currentSong", currentSong)
.putExtra("position",position)
.putExtra("songs",mySongs));
}
});
}
class CustomAdapter extends ArrayAdapter {
public android.util.Log Log;
List<String> names;
LayoutInflater inflater;
Context context;
public CustomAdapter(Context context, List<String> names) {
super(context,R.layout.list_item ,names);
this.names=names;
this.context=context;
}
#Override
public View getView(int position, View convertView, ViewGroup
parent) {
inflater=LayoutInflater.from(getContext()); //inflater is
responsible for taking your xml files that defines your layout
// and converting them into view objects.
View
customview=inflater.inflate(R.layout.list_item,parent,false);
String data=names.get(position);
//String data1=names.get(position+1);
TextView tv=
(TextView)customview.findViewById(R.id.textsongname);
tv.setText(data);
tv.setSelected(true);
//TextView tv1=(TextView)customview.findViewById(R.id.TeamB);
//tv1.setText(data1);
return customview;
}
}
}
**PlayerActivity.java**
I tried to make a Thread named update seek bar which will update my seek bar to current position after that I applied set on click bar change listener so that whenever user update position of sidebar it should get updated. But error here is that when I run my app using this code on emulator its working completely fine but when installed in my phone 2 errors are coming. One after completion of song its not jumping automatically to the next song and second when user update sidebar and press next, sidebar is not coming to position 0, and this whole error is showing on my phone not in emulator.
public class PlayerActivity extends AppCompatActivity {
Button play,next,fastforward, previous, fastrewind;
TextView txtsn, txtsstart, txtsstop;
SeekBar seekBar;
BarVisualizer visualizer;
Thread updateSeekBar;
String sName;
public static final String EXTRA_NAME = "song_name";
static MediaPlayer mediaPlayer;
int position;
ArrayList mySongs;
ImageView imageView;
#Override
public boolean onOptionsItemSelected(#NonNull MenuItem item) {
if (item.getItemId()== android.R.id.home){
onBackPressed();
}
return super.onOptionsItemSelected(item);
}
#Override
protected void onDestroy() {
if (visualizer != null){
visualizer.release();
}
super.onDestroy();
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_player);
getSupportActionBar().setTitle("Now Playing");
getSupportActionBar().setDisplayShowHomeEnabled(true);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
play = findViewById(R.id.play);
next = findViewById(R.id.next);
previous = findViewById(R.id.previous);
fastforward = findViewById(R.id.fastforward);
fastrewind = findViewById(R.id.fastrewind);
txtsn = findViewById(R.id.txtsn);
txtsstart = findViewById(R.id.txtsstart);
txtsstop = findViewById(R.id.txtsstop);
seekBar = findViewById(R.id.seekbar);
visualizer = findViewById(R.id.blast);
imageView = findViewById(R.id.iamgeView);
if (mediaPlayer != null){
mediaPlayer.stop();
mediaPlayer.release();
}
Intent intent = getIntent();
Bundle bundle = intent.getExtras();
mySongs = (ArrayList) bundle.getParcelableArrayList("songs");
sName = intent.getStringExtra("currentSong");
position = bundle.getInt("position",0);
txtsn.setText(sName);
txtsn.setSelected(true);
Uri uri = Uri.parse(mySongs.get(position).toString()); // uri is
usually use tell a content provider what we want to access by
reference
mediaPlayer = MediaPlayer.create(this,uri);
mediaPlayer.start();
seekBar.setMax(mediaPlayer.getDuration());
updateSeekBar = new Thread(){
#Override
public void run() {
int currentPosition = 0;
while (currentPosition<mediaPlayer.getDuration()){
try {
currentPosition = mediaPlayer.getCurrentPosition();
seekBar.setProgress(currentPosition);
sleep(500);
}
catch (Exception e) {
e.printStackTrace();
}
}
}
};
updateSeekBar.start();
seekBar.setOnSeekBarChangeListener(new
SeekBar.OnSeekBarChangeListener() {
#Override
public void onProgressChanged(SeekBar seekBar, int progress,
boolean fromUser) {
}
#Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
#Override
public void onStopTrackingTouch(SeekBar seekBar) {
mediaPlayer.seekTo(seekBar.getProgress());
}
});
String endTime = createTime(mediaPlayer.getDuration());
txtsstop.setText(endTime);
final Handler handler = new Handler();
final int delay = 1000;
handler.postDelayed(new Runnable() {
#Override
public void run() {
String currentTime =
createTime(mediaPlayer.getCurrentPosition());
txtsstart.setText(currentTime);
handler.postDelayed(this,delay);
}
},delay);
play.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if (mediaPlayer.isPlaying()){
play.setBackgroundResource(R.drawable.ic_play);
mediaPlayer.pause();
}
else {
play.setBackgroundResource(R.drawable.ic_pause);
mediaPlayer.start();
}
}
});
next.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
mediaPlayer.stop();
mediaPlayer.release();
if(position!=mySongs.size()-1){
position = position + 1;
}
else{
position = 0;
}
Uri uri = Uri.parse(mySongs.get(position).toString());
mediaPlayer = MediaPlayer.create(getApplicationContext(),
uri);
sName = mySongs.get(position).toString();
txtsn.setText(sName);
mediaPlayer.start();
play.setBackgroundResource(R.drawable.ic_pause);
seekBar.setMax(mediaPlayer.getDuration());
startAnimation(imageView);
int audiosessionId = mediaPlayer.getAudioSessionId();
if(audiosessionId!= -1){
visualizer.setAudioSessionId(audiosessionId);
}
}
});
mediaPlayer.setOnCompletionListener(new
MediaPlayer.OnCompletionListener() {
#Override
public void onCompletion(MediaPlayer mp) {
next.performClick();
}
});
int audiosessionId = mediaPlayer.getAudioSessionId();
if(audiosessionId!= -1){
visualizer.setAudioSessionId(audiosessionId);
}
previous.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
mediaPlayer.stop();
mediaPlayer.release();
if(position!=0){
position = position - 1;
}
else{
position = mySongs.size() - 1;
}
Uri uri = Uri.parse(mySongs.get(position).toString());
mediaPlayer = MediaPlayer.create(getApplicationContext(),
uri);
sName = mySongs.get(position).toString();
txtsn.setText(sName);
mediaPlayer.start();
play.setBackgroundResource(R.drawable.ic_pause);
seekBar.setMax(mediaPlayer.getDuration());
startAnimation(imageView);
int audiosessionId = mediaPlayer.getAudioSessionId();
if(audiosessionId!= -1){
visualizer.setAudioSessionId(audiosessionId);
}
}
});
fastforward.setOnClickListener(new View.OnClickListener()
{
#Override
public void onClick(View v) {
if (mediaPlayer.isPlaying()){
mediaPlayer.seekTo(mediaPlayer.getCurrentPosition()+1000);
}
}
});
fastrewind.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if (mediaPlayer.isPlaying()){
mediaPlayer.seekTo(mediaPlayer.getCurrentPosition()-1000);
}
}
});
}
private boolean isPermissionGranted(){
if (Build.VERSION.SDK_INT == Build.VERSION_CODES.R){
return Environment.isExternalStorageManager();
}
else {
int readExternalStoragePermission =
ContextCompat.checkSelfPermission(this,
Manifest.permission.READ_EXTERNAL_STORAGE);
return readExternalStoragePermission ==
PackageManager.PERMISSION_GRANTED;
}
}
public void startAnimation(View view){
ObjectAnimator animator =
ObjectAnimator.ofFloat(imageView,"rotation",0f,360f);
animator.setDuration(1000);
AnimatorSet animatorSet = new AnimatorSet();
animatorSet.playTogether(animator);
animatorSet.start();
}
public String createTime(int duration) {
String time = "";
int min = duration/1000/60;
int sec = duration/1000%60;
time+=min+":";
if (sec<10) {
time+="0";
}
time+=sec;
return time;
}
}
public class fragment_oneway_flight extends Fragment {
private Spinner spinner1 ;
Context thiscontext;
private int mYear, mMonth, mDay, mHour, mMinute;
int countadult= 1;
int countchild= 0;
int countinfant= 0;
private ProgressDialog pDialog,pDialog1;
TextView quantity_adult_textview, quantity_child_textview, quantity_infant_textview, textview_city_slct_from_oneway, textview_city_slct_to_oneway;
private ImageButton increment_adult_Button, decrement_adult_Button, increment_child_Button, decrement_child_Button, increment_infant_Button, decrement_infant_Button;
private Button prcdtoonwyrslt;
public fragment_oneway_flight() {
// Required empty public constructor
}
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
thiscontext = container.getContext();
View rootView = inflater.inflate(R.layout.fragment_oneway_flight, container, false);
LinearLayout select_dep_date = (LinearLayout) rootView.findViewById(R.id.date_from_select_oneway);
select_dep_date.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
DialogFragment dFragment = new DatePickerFragment();
// Show the date picker dialog fragment
dFragment.show(getFragmentManager(), "Date Picker");
}
});
LinearLayout city_slct_from_oneway = (LinearLayout) rootView.findViewById(R.id.city_slct_from_oneway);
city_slct_from_oneway.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
DialogBoxFragment DialogBoxFragment = new DialogBoxFragment ();
DialogBoxFragment.show(getFragmentManager(),"dialog");
}
});
LinearLayout city_slct_to_oneway = (LinearLayout) rootView.findViewById(R.id.city_slct_to_oneway);
city_slct_to_oneway.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
DialogBoxFragment2 DialogBoxFragment2 = new DialogBoxFragment2 ();
DialogBoxFragment2.show(getFragmentManager(),"dialog2");
}
});
prcdtoonwyrslt = (Button) rootView.findViewById( R.id.prcdtoonwyrslt );
prcdtoonwyrslt.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(getActivity(), activity_flight_result_oneway.class);
pDialog1 = new ProgressDialog(getActivity());
pDialog1.setMessage("Please Wait...");
pDialog1.setCancelable(false);
String countadult = quantity_adult_textview.getText().toString();
String countchild = quantity_child_textview.getText().toString();
String countinfant = quantity_infant_textview.getText().toString();
String selectedfromcity = textview_city_slct_from_oneway.getText().toString();
String selectedtocity = textview_city_slct_to_oneway.getText().toString();
intent.putExtra("adultsnos", countadult);
intent.putExtra("childsnos", countchild);
intent.putExtra("infantsnos", countinfant);
intent.putExtra("fromcity", selectedfromcity);
intent.putExtra("tocity", selectedtocity);
startActivity(intent);
}
});
// button function start
increment_adult_Button = (ImageButton) rootView.findViewById( R.id.increment_adult_Button );
decrement_adult_Button = (ImageButton) rootView.findViewById( R.id.decrement_adult_Button );
increment_child_Button = (ImageButton) rootView.findViewById( R.id.increment_child_Button );
decrement_child_Button = (ImageButton) rootView.findViewById( R.id.decrement_child_Button );
increment_infant_Button = (ImageButton) rootView.findViewById( R.id.increment_infant_Button );
decrement_infant_Button = (ImageButton) rootView.findViewById( R.id.decrement_infant_Button );
quantity_adult_textview = (TextView) rootView.findViewById(R.id.quantity_adult_textview);
quantity_child_textview = (TextView) rootView.findViewById(R.id.quantity_child_textview);
quantity_infant_textview = (TextView) rootView.findViewById(R.id.quantity_infant_textview);
increment_adult_Button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
countadult++;
if(countadult>7){
countadult=7;
}
display(countadult);
}
});
decrement_adult_Button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
countadult--;
if(countadult<1){
countadult=1;
}
display(countadult);
}
});
increment_child_Button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
countchild++;
if(countchild>5){
countchild=5;
}
display(countchild);
}
});
decrement_child_Button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
countchild--;
if(countchild<0){
countchild=0;
}
display(countchild);
}
});
increment_infant_Button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
countinfant++;
if(countinfant>5){
countinfant=5;
}
display(countinfant);
}
});
decrement_infant_Button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
countinfant--;
if(countinfant<0){
countinfant=0;
}
display(countinfant);
}
});
// button function end
setSpinnerContent( rootView );
spinner1.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> id, View rootView, int pos, long arg3) {
if (pos == 0) {
Toast.makeText(getActivity().getApplicationContext(),
"Select Class", Toast.LENGTH_SHORT)
.show();
} else if (pos == 1) {
Toast.makeText(getActivity().getApplicationContext(),
"You have selected Economy", Toast.LENGTH_SHORT)
.show();
} else if (pos == 2) {
Toast.makeText(getActivity().getApplicationContext(),
"You have selected Premium Economy", Toast.LENGTH_SHORT)
.show();
} else if (pos == 3) {
Toast.makeText(getActivity().getApplicationContext(),
"You have selected Business", Toast.LENGTH_SHORT)
.show();
}else if (pos == 4) {
Toast.makeText(getActivity().getApplicationContext(),
"You have selected First Class", Toast.LENGTH_SHORT)
.show();
}
}
#Override
public void onNothingSelected(AdapterView<?> arg0) {
Toast.makeText(getActivity().getApplicationContext(), "Nothing to select", Toast.LENGTH_LONG).show();
}
});
return rootView;
}
private void setSpinnerContent( View rootView ) {
spinner1 = (Spinner) rootView.findViewById( R.id.spinner_flight );
ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(getActivity(), R.array.flight_class_array, android.R.layout.simple_spinner_item);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner1.setAdapter( adapter );
}
public static class DatePickerFragment extends DialogFragment implements DatePickerDialog.OnDateSetListener{
#Override
public Dialog onCreateDialog(Bundle savedInstanceState){
final Calendar calendar = Calendar.getInstance();
int year = calendar.get(Calendar.YEAR);
int month = calendar.get(Calendar.MONTH);
int day = calendar.get(Calendar.DAY_OF_MONTH);
/*
Initialize a new DatePickerDialog
DatePickerDialog(Context context, DatePickerDialog.OnDateSetListener callBack,
int year, int monthOfYear, int dayOfMonth)
*/
DatePickerDialog dpd = new DatePickerDialog(getActivity(), R.style.DateDialog,this,year,month,day);
return dpd;
}
public void onDateSet(DatePicker view, int year, int month, int day){
// Do something with the chosen date
TextView dep_date_flight = (TextView) getActivity().findViewById(R.id.text_dep_date);
// Create a Date variable/object with user chosen date
Calendar cal = Calendar.getInstance();
cal.setTimeInMillis(0);
cal.set(year, month, day, 0, 0, 0);
Date chosenDate = cal.getTime();
// Format the date using style and locale
DateFormat df = DateFormat.getDateInstance(DateFormat.MEDIUM, Locale.US);
String formattedDate = df.format(chosenDate);
// Display the chosen date to app interface
dep_date_flight.setText(formattedDate);
}
}
private void display(int number) {
quantity_adult_textview.setText(String.valueOf(countadult));
quantity_child_textview.setText(String.valueOf(countchild));
quantity_infant_textview.setText(String.valueOf(countinfant));
}
public static class DialogBoxFragment extends DialogFragment {
//declaring variables
private ListView listviewforresults;
//Adapter for listview
ArrayAdapter<String> list1adapter;
//Edittext for search
EditText searchdata;
//ArrayList for listview
ArrayList<String> data=new ArrayList<String>();
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){
View rootView1 = inflater.inflate(R.layout.fragment_city_select_flight, container, false);
prepareDummyData();
listviewforresults=(ListView)rootView1.findViewById(R.id.showdata);
searchdata=(EditText)rootView1.findViewById(R.id.searchdata);
//set data to Adapter
list1adapter=new ArrayAdapter<String>(getActivity(), country_list,R.id.results,data);
listviewforresults.setAdapter(list1adapter);
//search data when text changes in edittext
searchdata.addTextChangedListener(new TextWatcher() {
#Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
list1adapter.getFilter().filter(s);
}
#Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
}
#Override
public void afterTextChanged(Editable s) {
}
});
listviewforresults.setOnItemClickListener(new AdapterView.OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// When clicked, show a toast with the TextView text
String selectedFromList = (String) listviewforresults.getItemAtPosition(position).toString();
TextView textview_city_slct_from_oneway = (TextView) getActivity().findViewById(R.id.textview_city_slct_from_oneway);
textview_city_slct_from_oneway.setText(selectedFromList);
getDialog().dismiss();
}
});
getDialog().setTitle("dialog");
return rootView1;
}
public void prepareDummyData()
{
data.add("Chennai");
data.add("Mumbai");
data.add("Bangalore");
data.add("Madurai");
data.add("Coimbatore");
data.add("Newdelhi");
}
}
public static class DialogBoxFragment2 extends DialogFragment {
//declaring variables
private ListView listviewforresults2;
//Adapter for listview
ArrayAdapter<String> list2adapter;
//Edittext for search
EditText searchdata;
//ArrayList for listview
ArrayList<String> data=new ArrayList<String>();
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){
View rootView2 = inflater.inflate(R.layout.fragment_city_select_flight2, container, false);
prepareDummyData2();
listviewforresults2=(ListView)rootView2.findViewById(R.id.showdata);
searchdata=(EditText)rootView2.findViewById(R.id.searchdata);
//set data to Adapter
list2adapter=new ArrayAdapter<String>(getActivity(), country_list,R.id.results,data);
listviewforresults2.setAdapter(list2adapter);
//search data when text changes in edittext
searchdata.addTextChangedListener(new TextWatcher() {
#Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
list2adapter.getFilter().filter(s);
}
#Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
}
#Override
public void afterTextChanged(Editable s) {
}
});
listviewforresults2.setOnItemClickListener(new AdapterView.OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// When clicked, show a toast with the TextView text
String selectedFromList2 = (String) listviewforresults2.getItemAtPosition(position).toString();
TextView textview_city_slct_to_oneway = (TextView) getActivity().findViewById(R.id.textview_city_slct_to_oneway);
textview_city_slct_to_oneway.setText(selectedFromList2);
getDialog().dismiss();
}
});
getDialog().setTitle("dialog2");
return rootView2;
}
public void prepareDummyData2() {
data.add("Chennai");
data.add("Mumbai");
data.add("Bangalore");
data.add("Madurai");
data.add("Coimbatore");
data.add("Newdelhi");
}
}
}
the above code is full fragment code with gialog innerclass too. im a beginner can you gys help me out of it?
and actually what i need is i have to click the from and to area in tab view fragment. after slecting it opens a dialog with search filter and listview. after clicking any list item it should diaplay in textview on parent fragment and after that i should be able wo pass the value to next fragment using put intent method.
currently im getting null value when i pass it to the next fragment.
i dont know why.
i have attached an image to get you the clear view. please check it.see here
I am trying to get my app to save when closed down or if back button is pressed. I'd like for it to remember which boxes are checked and what the score is on.
I've tried looking through previous articles to save the checkbox state to shared preferences but it doesn't seem to do anything. I've tried at least 5 different ways that I've found on here but it either just crashes the app or does nothing at all.
This is the code I've got:
public class levelOneActivity extends AppCompatActivity {
TextView scoreTextView;
Button backButton;
ConstraintLayout pictureConstraint;
Button nextLevelButton;
ListView levelOneListView;
ArrayAdapter arrayAdapter;
int score;
public static final String PREFS_NAME = "MyPrefsFile";
// SharedPreferences sharedPrefs = context.getSharedPreferences("sharedPrefs", Context.MODE_PRIVATE);
public void backButton(View view) {
pictureConstraint.setVisibility(View.INVISIBLE);
}
public void nextLevelButton(View view) {
Log.i("info", "next level!");
Intent intent = new Intent(getApplicationContext(), levelTwoActivity.class);
startActivity(intent);
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_level_one);
levelOneListView = findViewById(R.id.levelOneListView);
scoreTextView = findViewById(R.id.scoreTextView);
pictureConstraint = findViewById(R.id.pictureConstraint);
backButton = findViewById(R.id.backButton);
final ImageView imageView2 = findViewById(R.id.imageView2);
final TextView factTextView = findViewById(R.id.factTextView);
score = 0;
final ConstraintLayout levelFinishedConstraint = findViewById(R.id.finishedLevelConstraint);
nextLevelButton = findViewById(R.id.nextLevelButton);
final SharedPreferences sharedPreferences = this.getSharedPreferences("com.example.woodlandwanderer", Context.MODE_PRIVATE);
final String[] levelOneListList = new String[]{
"Daisy", "Rock", "Tree", "Dandelion", "Grass"
};
final int[] imageList = new int[]{
R.drawable.daisy, R.drawable.rock, R.drawable.tree, R.drawable.dandelion, R.drawable.grass
};
final String[] factList = new String[]{
"Daisies are cool", "Rocks are fun to throw!", "Trees have leaves!", "Dandelions are yellow", "Grass is green"
};
arrayAdapter = new ArrayAdapter(this, android.R.layout.simple_list_item_checked, levelOneListList);
levelOneListView.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
#Override
public boolean onItemLongClick(AdapterView<?> adapterView, View view, int i, long l) {
pictureConstraint.setVisibility(View.VISIBLE);
imageView2.setImageResource(imageList[i]);
factTextView.setText(factList[i]);
return true;
}
});
levelOneListView.setChoiceMode(AbsListView.CHOICE_MODE_MULTIPLE);
levelOneListView.setAdapter(arrayAdapter);
levelOneListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
Log.i("Info", "Clicked");
CheckedTextView checkedTextView = (CheckedTextView) view;
if (checkedTextView.isChecked()) {
if (score < 9) {
score++;
} else {
score++;
Handler handler = new Handler();
handler.postDelayed(new Runnable() {
#Override
public void run() {
levelFinishedConstraint.setVisibility(View.VISIBLE);
}
}, 1000);
}
} else {
Log.i("Info", "Not checked");
score = score - 1;
}
scoreTextView.setText(Integer.toString(score) + "/10");
}
});
}
}
I would suggest you to come up with an xml-file in which you set your own tag for check or unchecked boxes. Whenever the user exits the programm or presses the back button, the last thing before the application shut down is saving the current state of the checked boxes and replace the old version.
Another way to save the current state would be the database. I would modify it so can even type in xml-style, or you just push the names of the checked boxes to your database. Always the last step before shutting the application down.
Excuse my noobness. I just don't understand how to implement it to work with my code. What I'm doing is editing a name that's in a list view. When editing the name in "EditDeleteList" and get back to the previous activity (ListView) to see the name updated within the list view, nothing happens. I have to go out of the activity completely to see the change reflected. How do I get this to update? I implement an onActivityReult() method but then get this error message "java.lang.NullPointerException: Attempt to invoke interface method 'int java.util.List.size()' on a null object reference" so I removed it completely. How I could get the list view to update without getting that error message?
ListView.Java
public class ListView extends AppCompatActivity {
private static final String TAG = "ListView";
DatabaseHelper mDatabaseHelper;
Button btnAdd;
private EditText editText;
private android.widget.ListView listView;
#Override
protected void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_list_view);
mDatabaseHelper = new DatabaseHelper(this);
btnAdd = (Button) findViewById(R.id.btnAdd);
editText = (EditText) findViewById(R.id.editText);
listView = (android.widget.ListView) findViewById(R.id.lv);
ArrayList<String> list = getIntent().getStringArrayListExtra("myList");
android.widget.ListView lv = (android.widget.ListView) findViewById(R.id.lv);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, list);
lv.setAdapter(adapter);
//Takes user back to the main activity
ImageView ivBack = (ImageView) findViewById(R.id.ivBackArrow);
ivBack.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Log.d(TAG, "onClick: pressed back arrow");
Intent intent = new Intent(ListView.this, MainActivity.class);
startActivity(intent);
}
});
btnAdd.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
String newEntry = editText.getText().toString();
if (editText.length() != 0) {
addData(newEntry);
editText.setText("");
} else {
toastMessage("you must put something in the text field");
}
}
});
populateListView();
}
public void addData(String newEntry) {
boolean insertData = mDatabaseHelper.addData(newEntry);
if (insertData) {
toastMessage("Successfully inserted");
recreate();
} else {
toastMessage("Whoops, something went wrong");
}
}
private void toastMessage(String message) {
Toast.makeText(this, message, Toast.LENGTH_SHORT).show();
}
private void populateListView() {
Log.d(TAG, "populateListView: displaying data in the listview");
//get data and append to list
Cursor data = mDatabaseHelper.getData();
ArrayList<String> listData = new ArrayList<>();
while(data.moveToNext()) {
//get the value from the database in column 1
//set it to the arraylist
listData.add(data.getString(1));
}
//create arraylist and set it to the adapter
ListAdapter adapter = new ArrayAdapter<>(this, android.R.layout.simple_list_item_1, listData);
listView.setAdapter(adapter);
//set onclick listen to edit activity
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> adapterView, View view, int position, long id) {
String name = adapterView.getItemAtPosition(position).toString();
Log.d(TAG, "onItemClick: you clicked on " + name);
Cursor data = mDatabaseHelper.getItemID(name); //get the id associated with that name
int itemID = -1;
while (data.moveToNext()) {
itemID = data.getInt(0);
}
if (itemID > -1) {
Log.d(TAG, "onItemID: the ID is: " + itemID);
Intent editScreenIntent = new Intent(ListView.this, EditDeleteList.class);
editScreenIntent.putExtra("id",itemID);
editScreenIntent.putExtra("name",name);
startActivity(editScreenIntent);
} else {
toastMessage("No ID found");
}
}
});
}
}
EditDeleteList.java
public class EditDeleteList extends AppCompatActivity {
private static final String TAG = "EditDeleteList";
DatabaseHelper mDatabaseHelper;
private ImageView ivDelete;
private ImageView ivApprove;
private EditText editHashtag;
private String selectedName;
private int selectedID;
#Override
protected void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_edit_delete);
mDatabaseHelper = new DatabaseHelper(this);
editHashtag = (EditText) findViewById(R.id.editHashtag);
ivDelete = (ImageView) findViewById(R.id.ivDelete);
ivApprove = (ImageView) findViewById(R.id.ivApprove);
//get the intent extra from the ListView activity
final Intent receivedIntent = getIntent();
//get item ID passed as an extra
selectedID = receivedIntent.getIntExtra("id", -1);
//get name passed as an extra
selectedName = receivedIntent.getStringExtra("name");
//set text field to selected item text
editHashtag.setText(selectedName);
ivApprove.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
String item = editHashtag.getText().toString();
if (!item.equals(null)) {
mDatabaseHelper.updateName(item, selectedID, selectedName);
} else {
toastMessage("you must enter a #hashtag");
}
finish();
}
});
}
private void toastMessage(String message) {
Toast.makeText(this, message, Toast.LENGTH_SHORT).show();
}
}
In the EditDeleteList.java I have an onClickListener that saves the changes and goes back to the previous activity by using finish();
ivApprove.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
String item = editHashtag.getText().toString();
if (!item.equals(null)) {
mDatabaseHelper.updateName(item, selectedID, selectedName);
} else {
toastMessage("you must enter a #hashtag");
}
finish();
}
});
Notify the adapter in some part of the activity lifecycle.
OnCreate() should not run when you go back (this is the reason you have to completely recreate the activity to see the list updated) so you should use OnRestart/OnStart/OnResume to notify the adapter to check for new items.
Check this image