I have 1 ArrayList and 1 RecyclerView. Data from DB are retrieved and stored in the ArrayList for displaying in the RecyclerView. All the things work fine with adding new item to the RecyclerView, but without the adding animation. I know I should use notifyItemInserted for the adding animation, but it didn't work. No inserting animation was appearing. Now I have to go back to the previous page and then get in the page again so that the added item was showing. So, how to add back the inserting animation?
Any help will be very much appreciated. Thanks.
Code to pass the data and set the adapter:
db = new DatabaseHelper(this);
dbList = new ArrayList<>();
dbList = db.getFilteredItems();
RecyclerView mRecyclerView = (RecyclerView) findViewById(R.id.recyclerView);
mRecyclerView.setHasFixedSize(true);
LinearLayoutManager llm = new LinearLayoutManager(this);
llm.setOrientation(LinearLayoutManager.VERTICAL);
//newest to oldest order (database stores from oldest to newest)
llm.setReverseLayout(true);
llm.setStackFromEnd(true);
mRecyclerView.setLayoutManager(llm);
mRecyclerView.setItemAnimator(new DefaultItemAnimator());
adapter = new RecyclerAdapter(this, llm, dbList);
mRecyclerView.setAdapter(adapter);
Code to retrieve data from DB:
//retrieve filtered data from DB
public List<AudioItem> getFilteredItems(){
List<AudioItem> audioList = new ArrayList<>();
String titleName = EditActivity.titleName;
String query = "select * from " + TABLE_NAME + " where " + COLUMN_NAME_RECORDING_NAME + " like '" + titleName + "%'";
SQLiteDatabase db = this.getWritableDatabase();
Cursor cursor = db.rawQuery(query,null);
if (cursor.moveToFirst()){
do {
AudioItem audio = new AudioItem();
audio.setId(Integer.parseInt(cursor.getString(0)));
audio.setName(cursor.getString(1));
audio.setFilePath(cursor.getString(2));
audio.setLength(Integer.parseInt(cursor.getString(3)));
audio.setTime(Long.parseLong(cursor.getString(4)));
audioList.add(audio);
}while (cursor.moveToNext());
cursor.close();
}
return audioList;
}
Code to insert data into the DB:
/* Insert data into database */
public void addRecording(String recordingName, String filePath, long length) {
SQLiteDatabase db = getWritableDatabase();
ContentValues cv = new ContentValues();
cv.put(COLUMN_NAME_RECORDING_NAME, recordingName);
cv.put(COLUMN_NAME_RECORDING_FILE_PATH, filePath);
cv.put(COLUMN_NAME_RECORDING_LENGTH, length);
cv.put(COLUMN_NAME_TIME_ADDED, System.currentTimeMillis());
db.insert(TABLE_NAME, null, cv);
db.close();
if (mOnDatabaseChangedListener != null) {
mOnDatabaseChangedListener.onNewDatabaseEntryAdded();
}
}
Code to invoke the inserting animation:
#Override
public void onNewDatabaseEntryAdded() {
//item added to top of the list
Log.e("Count: ", Integer.toString(getItemCount()));
// notifyDataSetChanged();
notifyItemInserted(getItemCount());
//llm.scrollToPosition(getItemCount() - 1);
}
If you make a new ArrayList every time something changes and assign it to a new adapter and assign that new adapter to the RecyclerView, wonky things happen.
You should break the ArrayLists out into a Model type of object or integrate them into your current DB model object. If you do this, you can simply update itemlist and the changes will be reflected in your RecyclerView.
Here's some pseudo code since I don't really have much of your code to work off of:
public class DataModel {
private ArrayList<Foo> itemlist = new ArrayList<>();
public DataModel(){}
public ArrayList<Foo> getItemList() { return itemlist; }
}
public class YourActivity extends Activity {
private DataModel data = new DataModel();
#Override
protected void onCreate(Bundle b) {
if (b == null) {
RecyclerView dataView = (RecyclerView) findViewById(R.id.recyclerView);
dataView.setAdapter(new RecyclerAdapter(this, new LinearLayoutManager(this), data.getItemList()));
}
}
}
After you set things up this way, whenever you update itemlist, you should be seeing the changes automatically reflected. If not, call notifyDataSetChanged().
Related
I have a problem in my application, to see if there is someone who can help me.
It turns out that in my application I have made a database with SQLite that has two tables, one for players and one for results.
#Override
public void onCreate(SQLiteDatabase BaseDeDades) {
BaseDeDades.execSQL("create table jugadors(codi int primary key, nom text, cognoms text, data date, club text, categoria text)");
BaseDeDades.execSQL("create table resultats(codipuntuacio int primary key, codijugador int,codiexercici text, puntuacio text, temps long, data date)");
}
To consult the first of the tables (players) that shows a list of all the players entered in the database, I did it as follows.
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_llistajug);
Llistajugadors();
}
public void Llistajugadors(){
AdminSQLiteOpenHelper admin = new AdminSQLiteOpenHelper(this,"administracio",null,1);
SQLiteDatabase BaseDeDades = admin.getWritableDatabase();
if(BaseDeDades!=null){
Cursor c= BaseDeDades.rawQuery("select * from jugadors",null);
int quantitat = c.getCount();
int i=0;
String[] array = new String[quantitat];
if (c.moveToFirst()){
do{
String linia = c.getInt(0)+"-"+c.getString(1);
array[i] = linia;
i++;
}while(c.moveToNext());
}
ArrayAdapter<String>adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1,array);
final ListView llista = (ListView)findViewById(R.id.llista);
llista.setAdapter(adapter);
llista.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Intent intent = getIntent();
intent.putExtra("dato2", llista.getItemAtPosition(position).toString());
setResult(RESULT_OK,intent);
finish();
}
});
}
}
}
The problem has arisen when trying to consult the data of the other table (results) since I have tried to do it the same way
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_llistajug);
jugador = getIntent().getStringExtra("name");
exercici = getIntent().getStringExtra("exercise");
nom = jugador.split("-")[1];
codi = Integer.parseInt(jugador.split("-")[0]);
Resultats();
}
public void Resultats() {
AdminSQLiteOpenHelper admin = new AdminSQLiteOpenHelper(this, "administracio", null, 1);
SQLiteDatabase BaseDeDades = admin.getWritableDatabase();
if (BaseDeDades != null) {
Cursor c2 = BaseDeDades.rawQuery("select * from resultats",null);
int quantitat2 = c2.getCount();
int i2 = 0;
String[] array2 = new String[quantitat2];
if (c2.moveToFirst()) {
do {
String linia2 = c2.getInt(0) + "-" + c2.getString(1);
array2[i2] = linia2;
i2++;
} while (c2.moveToNext());
}
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, array2);
final ListView llista2 = (ListView) findViewById(R.id.llista2);
llista2.setAdapter(adapter);
}
}
}
But when executing this activity, in this case the application stops.
Does anyone know why if I have done it the same way? Thank you
This is the error that appears in Logcat when executing the activity:
Logcat error
Thanks, the bug was fixed. But now I have another problem with the query. How can I make the query for a string?
codijugador i codi are integers and it works correctly but adding another parameter codiexercici = exerici which are strings gives me an error, are they not done the same way?
Thanks, the bug was fixed. But now I have another problem with the query. How can I make the query for a string?
Thanks, the bug was fixed. But now I have another problem with the query. How can I make the query for a string?
co-player i codi are integers and it works correctly but adding another parameter codiexercici = exerici which are strings gives me an error, are they not done the same way?
Cursor c = BaseDeDades.rawQuery("select * from resultats where codijugador = "+codi+" and codiexercici="+exercici, null);
String must be enclosed inside single quotes, but this is something that you should not do by concatenating the parameters and the single quotes.
Use ? placeholders for the parameters and the 2nd argument of rawQuery() to pass them:
Cursor c = BaseDeDades.rawQuery(
"select * from resultats where codijugador = ? and codiexercici = ?",
new String[] {String.valueOf(codi), exercici}
);
My app layout apparently isn't a normal layout so I a having trouble setting my List Adapter to auto updated when an edit is made.
I make my edits to my database in this Java File which is controlled in its own activity and layout.
public void onClick(View view){
if (view == findViewById(R.id.addsave)) {
RecipeRepo repo = new RecipeRepo(this);
Recipe recipe = new Recipe();
if (editTextName.getText().toString().equals("")) {
editTextName.setError("Recipe name required!");
return;
} else {
recipe.name = editTextName.getText().toString();
}
if (textImagePath.getText().toString().equals("") ) {
recipe.image = ("");
}else{
recipe.image = textImagePath.getText().toString();
}
recipe.category = staticSpinner.getSelectedItem().toString();
if (editTextIngredients.getText().toString().equals("")) {
editTextIngredients.setError("Ingredient required!");
return;
} else {
recipe.ingredients = editTextIngredients.getText().toString();
}
if (editTextInstruct.getText().toString().equals("")) {
editTextIngredients.setError("Instruction required!");
return;
} else {
recipe.instructions = editTextInstruct.getText().toString();
}
recipe.cooktemp = editTextCookTemp.getText().toString();
recipe.cooktime = editTextCookTime.getText().toString();
recipe.serves = editTextServings.getText().toString();
recipe.recipe_Id = _Recipe_Id;
if (_Recipe_Id == 0) {
_Recipe_Id = repo.insert(recipe);
Toast.makeText(this, "New Recipe Added", Toast.LENGTH_SHORT).show();
finish();
it actually inserts and updates in this java file
int insert(Recipe recipe){
//Open connection to write data
SQLiteDatabase db = dbHelper.getWritableDatabase();
ContentValues values = new ContentValues();
values.put(Recipe.KEY_SERVES, recipe.serves);
values.put(Recipe.KEY_COOKTIME, recipe.cooktime);
values.put(Recipe.KEY_COOKTEMP, recipe.cooktemp);
values.put(Recipe.KEY_INSTRUCT, recipe.instructions);
values.put(Recipe.KEY_INGREDIENTS, recipe.ingredients);
values.put(Recipe.KEY_CATEGORY, recipe.category);
values.put(Recipe.KEY_IMAGE, recipe.image);
values.put(Recipe.KEY_NAME, recipe.name);
//Inserting Row
long recipe_Id = db.insert(Recipe.TABLE, null, values);
db.close();// Closing database connection
return (int) recipe_Id;
}
void delete(int recipe_Id){
SQLiteDatabase db = dbHelper.getWritableDatabase();
db.delete(Recipe.TABLE, Recipe.KEY_ID + "=?", new String[] {String.valueOf(recipe_Id)});
db.close();
}
void update(Recipe recipe){
SQLiteDatabase db = dbHelper.getWritableDatabase();
ContentValues values = new ContentValues();
values.put(Recipe.KEY_SERVES, recipe.serves);
values.put(Recipe.KEY_COOKTIME, recipe.cooktime);
values.put(Recipe.KEY_COOKTEMP, recipe.cooktemp);
values.put(Recipe.KEY_INSTRUCT, recipe.instructions);
values.put(Recipe.KEY_INGREDIENTS, recipe.ingredients);
values.put(Recipe.KEY_CATEGORY, recipe.category);
values.put(Recipe.KEY_IMAGE, recipe.image);
values.put(Recipe.KEY_NAME, recipe.name);
db.update(Recipe.TABLE, values, Recipe.KEY_ID + "=?", new String[]{String.valueOf(recipe.recipe_Id)});
db.close();
}
and lastly it gets put into the list view from this Java file and separate layout. Which is where my adapters are but i cannot get the notifyDataSetChanged() to work here at all... as in it wont even come up.
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
RecipeRepo repo = new RecipeRepo(this);
if (id == R.id.nav_meat) {
final ArrayList<HashMap<String, String>> recipeList = repo.getRecipeMeat();
if(recipeList.size()!=0) {
ListView lv = (ListView) findViewById(R.id.list);
lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
recipe_Id = (TextView) view.findViewById(R.id.recipe_Id);
String recipeId = recipe_Id.getText().toString();
Intent objIndent = new Intent(getApplicationContext(), RecipeDetail.class);
objIndent.putExtra("recipe_Id", Integer.parseInt(recipeId));
startActivity(objIndent);
}
});
ListAdapter adapter = new SimpleAdapter(SousChef.this, recipeList, R.layout.view_recipe_entry, new String[]{"id", "category", "name"}, new int[]{R.id.recipe_Id, R.id.recipe_list_category, R.id.recipe_list_name});
lv.setAdapter(adapter);
}else {
Toast.makeText(this, "No recipe!", Toast.LENGTH_SHORT).show();
}
} else if (id == R.id.nav_veg) {
final ArrayList<HashMap<String, String>> recipeList = repo.getRecipeVeg();
if(recipeList.size()!=0) {
ListView lv = (ListView) findViewById(R.id.list);
lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
recipe_Id = (TextView) view.findViewById(R.id.recipe_Id);
String recipeId = recipe_Id.getText().toString();
Intent objIndent = new Intent(getApplicationContext(), RecipeDetail.class);
objIndent.putExtra("recipe_Id", Integer.parseInt(recipeId));
startActivity(objIndent);
}
});
ListAdapter adapter = new SimpleAdapter(SousChef.this, recipeList, R.layout.view_recipe_entry, new String[]{"id", "category", "name"}, new int[]{R.id.recipe_Id, R.id.recipe_list_category, R.id.recipe_list_name});
lv.setAdapter(adapter);
}else {
Toast.makeText(this, "No recipe!", Toast.LENGTH_SHORT).show();
}
So any advise on setting this up to automatically update would be a huge help. I have been racking my brain over this for a couple days now looking at different examples and what not, but no setup is quite like this one which doesnt allow me to have everything in one file.
And thank you in advance.
category picking image:
Category picking Image
There are for sure more answers but this is one that might help,
Quick Example for the proposed solution
SHORT EXPLANATION
inside MainActivity
//create a public static adapter
public static ListAdapter adapter
inside onCreateView()
//Create your adapter and set it to the right ListView
ListView lv = findViewById(R.id.listView_in_xml);
adapter = new SimpleAdapter(...)
lv.setAdapter(adapter)
inside CustomAdapter which in your case I assume is SimpleAdapter
//add a public method to be called so that the Adapter updates and displays the new data
public void updateMethod(){
//update your List<Recipe> that I would guess you have calling the database again
//if needed update your getCount() return value so that it returns the number of childs in your ListView which most of the cases is just the List<Recipe>.size()
//notifyDataSetChanged()
}
inside your DB HANDLER CLASS
//in every update, add, delete or any method that requires the ListView to Update just call the created method,
MainActivity.CustomAdapter.updateMethod();
PROBLEMS
You will have to make sure the public static adapter has been initialized and is not null, or simply check whether the adapter is not null and update, because if the adapter is null that activity has not launched yet thus no need to trigger the updateMethod().
OTHER SOLUTIONS
Instead of creating a public static adapter create a public static boolean, then whenever data changes set that boolean to true from the database.
Finally, whenever you resume your activity check against that boolean and update your ListViewAdapter if needed.
MORE COMPLICATED SOLUTIONS WHICH I KNOW WORK CAUSE I USE IT
Use TaskAsyncTaskLoader which utilizes a Loader in your MainActivity and implements LoaderManager.LoaderCallbacks.
Optionally, you can make the Loader be, public static Loaderand inside your DBHandler you trigger the loader to load the data again or use any other logic you want.
Proofs of Working suggested solution,
You can Broadcast Intent from the change database file after you get the response in the onCreate() of adapter loading class
Intent intent = new Intent("key_to_identify_the_broadcast");
Bundle bundle = new Bundle();
bundle.putString("edttext", "changed");
intent.putExtra("bundle_key_for_intent", bundle);
context.sendBroadcast(intent);
and then you can receive the bundle in your fragment by using the BroadcastReceiver class
private final BroadcastReceiver mHandleMessageReceiver = new
BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
Bundle bundle =
intent.getExtras().getBundle("bundle_key_for_intent");
if(bundle!=null){
String edttext = bundle.getString("edttext");
}
//you can call any of your methods for using this bundle for your use case
}
};
in onCreate() of your adapter adding class you need to register the broadcast receiver first otherwise this broadcast receiver will not be triggered
IntentFilter filter = new IntentFilter("key_to_identify_the_broadcast");
getActivity().getApplicationContext().
registerReceiver(mHandleMessageReceiver, filter);
Finally you can unregister the receiver to avoid any exceptions
#Override
public void onDestroy() {
try {
getActivity().getApplicationContext().
unregisterReceiver(mHandleMessageReceiver);
} catch (Exception e) {
Log.e("UnRegister Error", "> " + e.getMessage());
}
super.onDestroy();
}
I'm working on an app for a robot where the user can define punch combinations which the robot will later fetch from the device. To allow the user to store these trainings I have defined a class "Trainings" which holds the id, the name and the punch combination of the training. This training is later saved in a database, for which I have written a DatabaseHandler class. Adding and displaying the data works fine, but whenever I want to delete an entry with the method below:
public void deleteTraining(Training training) {
SQLiteDatabase db = this.getWritableDatabase();
db.delete(TABLE_TRAININGS, KEY_ID + " = ?",
new String[] { String.valueOf(training.getID()) });
db.close();
}
and later try to populate my GridView again ( handled by a GridAdapter class), I get a Nullpointer Exception
java.lang.NullPointerException: Attempt to read from field 'java.lang.String com.noeth.tobi.mcrobektrainingsplaner.Training._name' on a null object reference
at com.noeth.tobi.mcrobektrainingsplaner.GridAdapter.getView(GridAdapter.java:50)
the getView method of the GridAdapter:
public View getView(int position, View convertView, ViewGroup parent) {
if (convertView == null) {
// if it's not recycled, initialize some attributes
btn = new Button(context);
btn.setLayoutParams(new GridView.LayoutParams(370, 350));
btn.setPadding(2,100,2,100);
btn.setOnClickListener(new CustomOnClickListener(position, context));
btn.setOnLongClickListener(new CustomOnLongClickListener(position, context, btn));
}
else {
btn = (Button) convertView;
}
btn.setText(db.getTraining(position)._name); //Here the programm throws a Nullpointer Exception AFTER deleting an entry from the database
btn.setTextColor(Color.WHITE);
btn.setBackgroundResource(R.drawable.button_border);
btn.setTag("not_activated");
btn.setId(position);
return btn;
}
I figured that it must have something to do with the id of the deleted training, as the loop simply goes through all ids so I wrote a method recalcIDs which recalculates the id of every item coming after the deleted training:
recalcIDs
public void recalcIDs(){
int k = 1;
int subtract = 1;
int id;
Training training;
for(int i = deleted.get(0)+1; i < db.getTrainingCount(); i++){
if(deleted.size() > 1){
if(i < deleted.get(k)){
training = db.getTraining(i);
id = training.getID();
training.setID(id-subtract);
}
else{
k+=1;
subtract+=1;
}
}
else{
training = db.getTraining(i);
id = training.getID();
training.setID(id-subtract);
}
}
}
However this does not fix it.
When reinstalling the app and starting with a completely new database everythings works again.
Does anybody have an idea what I've done wrong?
P.S.: Here's the getTraining method where it can't find the name:
Training getTraining(int id) {
SQLiteDatabase db = this.getReadableDatabase();
Training training;
Cursor cursor = db.query(TABLE_TRAININGS, new String[] { KEY_ID,
KEY_NAME, KEY_SK}, KEY_ID + "=?",
new String[] { String.valueOf(id) }, null, null, null, null);
if (cursor != null && cursor.moveToFirst()){
training = new Training(Integer.parseInt(cursor.getString(0)),
cursor.getString(1), cursor.getLong(2));
cursor.close();
}
else{
training = null;
Toast.makeText(con,"Couldn't find any training sessions!", Toast.LENGTH_LONG).show();
}
// return training
return training;
}
I'm assuming your the Training.setId method doesn't call the database.
You shouldn't change the id of your training because they get managed by the underlaying database. If you only change the ids in you application logic both datasets (application and database) will differ.
I would recommend to reload all the trainings from the database after a user decided to delete one and call the Gridview.notifyDatasetChanged afterwards.
I am trying to create a database of restaurants and their items for an app as a starter project to get familiar with android. I have a list from a previous activity where a user clicks on the name of the restaurant and the items are shown. I created a helperDB class to handle the insert statements and database setup, although when I called my insert method from inside a new thread, they do not seem to execute. I have provided the code below:
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_display_bar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
Intent intent = getIntent();
String barName = intent.getStringExtra(MainActivity.EXTRA_MESSAGE);
final TextView tv = (TextView) findViewById(R.id.name);
tv.setText(barName);
restaurants = new ArrayList<String>();
mydb = new DBHelper(this);
new Thread(new Runnable() {
#Override
public void run() {
mydb.insertDrink("cake", "McD's", 8);
mydb.insertDrink("muffin", "The Woods", 8);
restaurants = mydb.getDrinks("The Woods");
System.out.println(restaurants);
}
}).start();
ArrayAdapter arrayAdapter=new ArrayAdapter(this,android.R.layout.simple_list_item_1, restaurants);
obj = (ListView)findViewById(R.id.listview);
obj.setAdapter(arrayAdapter);
}
The code for the insert statement and getDrinks method are as follows:
public boolean insertDrink(String drink, String name, int price){
SQLiteDatabase db = this.getWritableDatabase();
ContentValues contentValues = new ContentValues();
contentValues.put("drink", drink);
contentValues.put("name", name);
contentValues.put("price", price);
db.insert("Bars", null, contentValues);
return true;
}
public ArrayList<String> getDrinks(String name){
ArrayList<String> arrayList = new ArrayList<>();
SQLiteDatabase db = this.getReadableDatabase();
Cursor res = db.rawQuery("select * from Bars", null);
res.moveToFirst();
while(res.isAfterLast() == false){
arrayList.add(res.getString(res.getColumnIndex(BAR_COLUMN_DRINK)));
res.moveToNext();
}
return arrayList;
}
I know that I am not supposed to access any android toolkits from any thread besides the UI thread, although I don't think I am doing that. If this is not the normal way to populate a SQLite android database, I of course am willing to learn where to do that as well.
although when I called my insert method from inside a new thread, they
do not seem to execute.
How can you say that? Are you seeing data entries in database? Or by looking only for restaurant ArrayList?
My doubt is you are not getting your Restaurant ArrayList because your Thread runs asynchronously.
And your next statement after Thread executed without waiting to fill restaurnat arrayList.
Solution:
Use AsyncTask call your database stuff in doInBackground() and get result in onPostExecute() and set adapter with result in the same method.
I suggest you to use AsyncTask.
Maybe something like this:
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_display_bar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
Intent intent = getIntent();
String barName = intent.getStringExtra(MainActivity.EXTRA_MESSAGE);
final TextView tv = (TextView) findViewById(R.id.name);
tv.setText(barName);
new AsyncTask<Void, Void, ArrayList<String>> {
protected Long doInBackground() {
DBHelper mydb = new DBHelper(ThisActivityClassName.this);
mydb.insertDrink("cake", "McD's", 8);
mydb.insertDrink("muffin", "The Woods", 8);
return mydb.getDrinks("The Woods");
}
protected void onPostExecute(ArrayList<String> restaurants) {
ArrayAdapter arrayAdapter=new ArrayAdapter(this,android.R.layout.simple_list_item_1, restaurants);
obj = (ListView)findViewById(R.id.listview);
obj.setAdapter(arrayAdapter);
}
}.execute();
}
My Function In SQLAdapter class is
public ArrayList<Airline> getairlinedetails(String bookingdate) {
Cursor curCalllog =db.rawQuery("SELECT * FROM "+ BOOK +
" WHERE " + date +
" BETWEEN '" + startdate + "' AND '" + enddate + "'", null);
if (curCalllog != null) {
if (curCalllog.moveToFirst()) {
do {
a=new Airline();
//a.setBookingdate(curCalllog.getString(1));
a.setPickupadd(curCalllog.getString(2));
a.setCity(curCalllog.getString(3));
a.setTrip(curCalllog.getString(4));
a.setFdate(curCalllog.getString(5));
a.setFtime(curCalllog.getString(6));
a.setCdate(curCalllog.getString(7));
a.setPtime(curCalllog.getString(8));
a.setSeats(curCalllog.getInt(9));
a.setAmount(curCalllog.getInt(10));
update.add(a);
} while (curCalllog.moveToNext());
}
}
return update;
}
M Fetching data between two dates and
I Want To show the fetched data into listview please help me how to do it I m new in android development.
You can use SimpleCursorAdapter for showing Databse contents in Listview. Make instance of SimpleCursorAdapter and pass Cursor object into it. Refer this link
If you want Customized Listview, you can customize SimpleCursorAdapter by extending this with your custom adapter class.
you can follow this example :
DataManipulator.java -helper class
//to retrieve data in a list
public List<String[]> selectAll()
{
List<String[]> list = new ArrayList<String[]>();
Cursor cursor = db.query(TABLE_NAME, new String[] { "id","name","number","skypeId","address" },
null, null, null, null, "name asc");
int x=0;
if (cursor.moveToFirst()) {
do {
String[] b1=new String[]{cursor.getString(0),cursor.getString(1),cursor.getString(2),cursor.getString(3),cursor.getString(4)};
list.add(b1);
x=x+1;
} while (cursor.moveToNext());
}
if (cursor != null && !cursor.isClosed()) {
cursor.close();
}
cursor.close();
return list;
}
CheckData.java
// to show data in a list view
public class CheckData extends ListActivity {
TextView selection;
public int idToModify;
DataManipulator dm;
List<String[]> list = new ArrayList<String[]>();
List<String[]> names2 =null ;
String[] stg1;
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.check);
dm = new DataManipulator(this);
names2 = dm.selectAll();
stg1=new String[names2.size()];
int x=0;
String stg;
for (String[] name : names2) {
stg = name[1]+" - "+name[2]+ " - "+name[3]+" - "+name[4];
stg1[x]=stg;
x++;
}
ArrayAdapter<String> adapter = new ArrayAdapter<String>(
this,android.R.layout.simple_list_item_1,
stg1);
this.setListAdapter(adapter);
selection=(TextView)findViewById(R.id.selection);
}
public void onListItemClick(ListView parent, View v, int position, long id) {
selection.setText(stg1[position]);
}
}
follow this link for complete tutorial
I assume you are getting data from database and there by complete ArrayList with Airline objects.
Now to display data in ListView from ArrayList<Airline>, you have to define Custom adapter class by extending either BaseAdapter or ArrayAdapter.
Here you go: How to define custom adapter for ListView?
I Want To show the fetched data into listview please help me how to do
it I m new in android development
Simpliest way is to use ArrayAdapter with build-in ListView's row layout.
ListView list = (ListView) findViewById(R.id.yourList);
ArrayList<Airline> data = db.getairlinedetails("someString");
ArrayAdapter<Airline> adapter = new ArrayAdapter<Airline>(this,
android.R.layout.simple_list_item_1, data);
list.setAdapter(adapter);
But since this you need to also override toString() method in your Airline class.
Reason is that your ArrayAdapter will convert each child(provided list of airlines) to String and if you won't override toString() you will get default string representation of object but you probably need to show for instance name of airline so your method can looks like
#Override
public String toString() {
return this.name;
}
Note:
This is simple way. But if you want to get more control over ListView and create custom list i recommend you to create own subclass of ListAdapter for example BaseAdapter and define your own Adapter. Sorry but i won't write you implementation because it requires much more code but nice examples you can find here:
Customizing Android ListView Items with Custom ArrayAdapter
Android ListView, ListActivity and ListFragment - Tutorial
Android Custom ListView with Image and Text