Develop Reference

Toast from spinner not showing

The spinner has an array list of band genres when selecting any of the genres in the spinner it will display a toast, the toast isn't showing when clicking the spinner, the code isn't showing any errors ? any ideas why ?
String spinnerSelection = null;
Spinner spinner = null;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate( savedInstanceState );
setContentView( R.layout.activity_main );
ArrayAdapter<String> adapter = new ArrayAdapter<>(
this, android.R.layout.simple_spinner_item, spinnerContent);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner = (Spinner) findViewById(R.id.spinner);
spinner.setAdapter(adapter);
Button button = (Button) findViewById(R.id.button);
button.setOnClickListener(new View.OnClickListener() {
public void onItemSelected(AdapterView<?>parent, View v, int position, long id) {
{
Toast.makeText( getBaseContext(),"Hell Yeah", Toast.LENGTH_SHORT).show();
}
}
public void onNothingSelected(AdapterView<?> arg0) {
}
}

Don't forget to add click listener in the spinner
spinner.setOnItemClickListener(this);

You are adding setOnClickListener() on your button. Add setOnItemClickListener() to your spinner.

You need to put #Override for onItemSelected(...) and onNothingSelected(...) functions.
Make sure you set a listener on the spinner:
spinner.setOnItemClickListener(this);
Edit
public class MainActivity extends AppCompatActivity implements AdapterView.OnItemSelectedListener {
MediaPlayer myMusic;
int paused;
public void play(View view) {
if (myMusic == null) {
myMusic = MediaPlayer.create( this, R.raw.fast_and_cold );
myMusic.start();
}
}
public void stop(View view) {
myMusic.reset();
myMusic = null;
}
String spinnerSelection = null;
Spinner spinner = null;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate( savedInstanceState );
setContentView( R.layout.activity_main );
final List<String> spinnerContent = new ArrayList<>();
spinnerContent.add("Black Metal");
spinnerContent.add("Death Metal");
spinnerContent.add("Thrash Metal");
spinnerContent.add("Heavy Metal");
ArrayAdapter<String> adapter = new ArrayAdapter<>(
this, android.R.layout.simple_spinner_item, spinnerContent);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner = (Spinner) findViewById(R.id.spinner);
spinner.setAdapter(adapter);
spinner.setOnItemSelectedListener(this); // add this line
Button button = (Button) findViewById(R.id.button);
button.setOnClickListener(new View.OnClickListener() {
}
#Override // add this line
public void onItemSelected(AdapterView<?>parent, View v, int position, long id) {
Toast.makeText( getBaseContext(),"Show your Devil Horns !!", Toast.LENGTH_SHORT).show();
}
#Override // add this line
public void onNothingSelected(AdapterView<?> arg0) {
}
}

use intent and the putextra method to pass the pos in the following code?

Mainactivity.java
this is the mainactivity which calls the three methods
public class MainActivity extends Activity {
Button b = (Button) findViewById(R.id.button);
public TextView t = (TextView) findViewById(R.id.postp);
public Spinner catspinner,planspinner1,planspinner2;
protected void onCreate(Bundle mbfSplash) {
super.onCreate(mbfSplash);
setContentView(R.layout.activity_main);
chooseCategory();
chooseone();
choosetwo();
}
public void chooseCategory() {
catspinner = (Spinner) findViewById(R.id.catspinner);
ArrayAdapter<CharSequence> catAdapter = ArrayAdapter.createFromResource(this, R.array.states_array, android.R.layout.simple_spinner_item);
catAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
catspinner.setAdapter(catAdapter);
catspinner.setOnItemSelectedListener(new planOnClickListener());
}
private void chooseone(){
planspinner1 = (Spinner) findViewById(R.id.planspinner);
List<String> planlist = new ArrayList<String>();
planlist.add("Mandu");
planlist.add("Chanderi");
planlist.add("Jabalpur");
planlist.add("Orccha");
planlist.add("Bhopal");
ArrayAdapter<String> planAdapter1 = new ArrayAdapter<String>(this,
android.R.layout.simple_spinner_item, planlist);
planAdapter1.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
planspinner1.setAdapter(planAdapter1);
}
private void choosetwo(){
planspinner2 = (Spinner) findViewById(R.id.planspinner);
List<String> planlist1 = new ArrayList<String>();
planlist1.add("Premier Plan");
planlist1.add("The Executive Plan");
planlist1.add("Business Circle Plan");
planlist1.add("Business Diamond Plan");
ArrayAdapter<String> planAdapter2 = new ArrayAdapter<String>(this,
android.R.layout.simple_spinner_item, planlist1);
planAdapter2.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
planspinner2.setAdapter(planAdapter2);
}
public class planOnClickListener implements OnItemSelectedListener {
#Override
public void onItemSelected(AdapterView<?> parent, View v, int pos,
long id) {
final int p = pos;
parent.getItemAtPosition(pos);
if (pos==0){
choosePersonalPlan();
}else if (pos==1){
chooseLargeBusPlan();
} else if (pos==2){
chooseSmallMedPlan();
}
/*Intent intent = new Intent(new Intent("com.example.android.testing.SecondActivity"));
intent.putExtra("value",str);
//---set the data to pass back---
//data.setData(Uri.parse(str));
//setResult(RESULT_OK, data);
//---closes the activity---
//finish();
startActivity(intent);*/
}
#Override
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
}
}
the choosecategory() method gives a selected item from spinner
the next method are choosed on the basis of the first spinner item(i.e. second spinner is dependent on the spinner no. one)
second method maybe choose 1 or choose 2
the method is choosen by the help of the onItemSelected method in the planOnClickListener
thanks for the help...

Just pass your extra to your intent
Intent intent = new Intent(MainActivity.this, SecondActivity.class);
intent.putExtra("key","value");
startActivity(intent);

getting value from two spinner into string variables

I'm trying to pass the strings "año" and "artista" from two spinners to the next activity and I get the value "año" but "artista" is always void. I used this method to get the values in other activity and there it works but here, "artista" is always void. Moreover, I have tried with switch method and without success.
I hope someone helps me and tells me what I'm doing wrong. I read and look for information before ask for help,
This is my code,
public class Buscar extends Activity implements OnItemSelectedListener{
String año;
String artista;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_buscar);
Buscar();
Spinner spinnerBuscarAño = (Spinner) findViewById(R.id.añoSpinner);
String[] añoBuscar = {"1995", "2000", "2005"};
spinnerBuscarAño.setAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_spinner_dropdown_item, añoBuscar));
spinnerBuscarAño.setOnItemSelectedListener(this);
Spinner spinnerBuscarArtista = (Spinner) findViewById(R.id.artistaSpinner);
String[] artistaBuscar = {"Michael Jackson", "U2", "Depeche Mode"};
spinnerBuscarArtista.setAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_spinner_dropdown_item, artistaBuscar));
spinnerBuscarArtista.setOnItemSelectedListener(this);
}
/*
public void onItemSelected(AdapterView<?> parent, View view,int pos, long id) {
switch (parent.getId()) {
case R.id.añoSpinner:
año = parent.getItemAtPosition(pos).toString();
break;
case R.id.artistaSpinner:
artista = parent.getItemAtPosition(pos).toString();
break;
default:
break;
}
}
*/
#Override
public void onItemSelected(AdapterView<?> parent, View v, int position,
long id){
// TODO Auto-generated method stub
Spinner spinner = (Spinner) parent;
if(spinner.getId() == R.id.añoSpinner)
{
año = parent.getItemAtPosition(position).toString();
}
else if(spinner.getId() == R.id.artistaSpinner)
{
artista = parent.getItemAtPosition(position).toString();
}
}
#Override
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
}
public void Buscar() {
Button buttonBuscar = (Button) findViewById(R.id.buscar);
buttonBuscar.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View arg0) {
Toast.makeText(getApplicationContext(),artista, Toast.LENGTH_SHORT).show();
Intent intentBuscar = new Intent(Buscar.this, ListadoMusica.class);
intentBuscar.putExtra("myaño", año);
intentBuscar.putExtra("myartista", artista);
startActivity(intentBuscar);
}
});
}
}
If someone can help me,
Thanks in advance,

Possibly you are trying to catch a string of intent with another name.
Try this code:
SpinnerTest.java
public class SpinnerTest extends Activity implements AdapterView.OnItemSelectedListener {
String year;
String artist;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.spinner_activity);
Spinner spinnerYear = (Spinner) findViewById(R.id.spinner1);
final String[] years = {"1995", "2000", "2005"};
spinnerYear.setAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_spinner_dropdown_item, years));
spinnerYear.setOnItemSelectedListener(this);
Spinner spinnerArtists = (Spinner) findViewById(R.id.spinner2);
final String[] artists = {"Michael Jackson", "U2", "Depeche Mode"};
spinnerArtists.setAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_spinner_dropdown_item, artists));
spinnerArtists.setOnItemSelectedListener(this);
Button btnSearch = (Button) findViewById(R.id.btnSearch);
btnSearch.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent searchIntent = new Intent(SpinnerTest.this, SearchActivity.class);
searchIntent.putExtra("year", year);
searchIntent.putExtra("artist", artist);
startActivity(searchIntent);
}
});
}
#Override
public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {
switch (adapterView.getId()){
case R.id.spinner1:
year = adapterView.getSelectedItem().toString();
Toast.makeText(SpinnerTest.this, year, Toast.LENGTH_LONG).show();
break;
case R.id.spinner2:
artist = adapterView.getSelectedItem().toString();
Toast.makeText(SpinnerTest.this, artist, Toast.LENGTH_LONG).show();
break;
}
}
#Override
public void onNothingSelected(AdapterView<?> adapterView) {
}
}
SearchActivity.java:
public class SearchActivity extends ActionBarActivity {
String year;
String artist;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_receive_spinner_value);
TextView txtYear = (TextView) findViewById(R.id.txtYear);
TextView txtArtist = (TextView) findViewById(R.id.txtArtist);
if(getIntent().hasExtra("year")){
year = getIntent().getStringExtra("year");
txtYear.setText(year);
}
if(getIntent().hasExtra("artist")){
artist = getIntent().getStringExtra("artist");
txtArtist.setText(artist);
}
}
}
It works for me

Get selected item on spinner won't work

I was tried to retrieve data from database based selected item on spinner.
Here is my database structure
Here is my Activity:
public class help_activity extends Activity implements OnClickListener{
Spinner spinner1;
SQLiteConnector sqlConnect;
ListView lvUsers;
Button b1;
String colors[] = {"Bristleback","Sven","Tiny","Undying", "Naix","Weaver","Spectre","Lich"};
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.layout_help);
spinner1 = (Spinner) findViewById(R.id.spinner1);
lvUsers = (ListView) findViewById(R.id.listView1);
b1 = (Button) findViewById(R.id.btn1);
sqlConnect = new SQLiteConnector(this);
addListenerOnSpinnerItemSelection();
final String nameSelected = spinner1.getSelectedItem().toString();
final ArrayAdapter<String> adapter = new ArrayAdapter<String>(
this, android.R.layout.simple_list_item_1, sqlConnect.getAllRecord(nameSelected));
b1.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
if (nameSelected.equals("Bristleback")) {
lvUsers.setAdapter(adapter);
adapter.notifyDataSetChanged();
}
else if (nameSelected.equals("Sven")) {
lvUsers.setAdapter(adapter);
adapter.notifyDataSetChanged();
}
else if (nameSelected.equals("Tiny")) {
lvUsers.setAdapter(adapter);
}
else if (nameSelected.equals("Undying")) {
lvUsers.setAdapter(adapter);
adapter.notifyDataSetChanged();
}
else if (nameSelected.equals("Naix")) {
lvUsers.setAdapter(adapter);
adapter.notifyDataSetChanged();
}
else if (nameSelected.equals("Weaver")) {
lvUsers.setAdapter(adapter);
adapter.notifyDataSetChanged();
}
else if (nameSelected.equals("Spectre")) {
lvUsers.setAdapter(adapter);
adapter.notifyDataSetChanged();
}
else if (nameSelected.equals("Lich")) {
lvUsers.setAdapter(adapter);
adapter.notifyDataSetChanged();
}
// TODO Auto-generated method stub
}
});
}
public void addListenerOnSpinnerItemSelection() {
ArrayAdapter<String> spinnerArrayAdapter = new ArrayAdapter<String>
(this, android.R.layout.simple_spinner_dropdown_item,colors );
spinner1.setAdapter(spinnerArrayAdapter);
}
#Override
public void onClick(View v) {
}
}
And this my method to retrieve data from database:
public List<String> getAllRecord(String nameSelected) {
List<String> namagambar = new ArrayList<String>();
String selectQuery = "SELECT * FROM " + TABLE_RECORD + " WHERE "
+ HERO_NAME + "=?";
database = dbHelper.getReadableDatabase();
cursor = database.rawQuery(selectQuery, new String[]{nameSelected});
if (cursor.moveToFirst()) {
do {
namagambar.add(cursor.getString(1));
} while (cursor.moveToNext());
}
database.close();
return namagambar;
}
So, when user selected an item on spinner, then the data at nama_hero will showed at listview based on the selected name hero on spinner. But when i running my code, it just showed the top of data on the database
So when i selected name Sven on spinner, the name that showed on listview not "sven" but "bristleback". And it happened also when I choose other hero name.
I think my method to get the name of the selected item in the spinner does not work
Please help me to fix this problem.
SOLVED !!!

Done !!
I already solved this problem, thanks stackoverflow
I change my setOnclickListener become like this b1.setOnClickListener(this);
And move all the items that were in previous to:
public void onClick(View v) {
}

Try to get selected item inside ClickListener
b1.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
String nameSelected = spinner1.getSelectedItem().toString();

any advice or hints for refreshing ArrayAdapter?

here I have a Fragment, I use this code and everything works normally, and what I want to do is update my shown list if there is a new file, could you guys give any advice or hint?
CODE:
public class HomeFragment extends Fragment {
public static final String TITLE = "title";
private List<String> library = new ArrayList<String>();
private TextView tv;
private ListView lv;
private ArrayAdapter<String> adapter;
public static Handler handHF;
private String[] temp;
private Object UIlock = new Object();
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.home_fragment, container,
false);
library = getLibraryList();
if (!library.isEmpty()) {
if (tv != null) {
tv.setVisibility(View.GONE);
} else {
temp = library.toArray(new String[library.size()]);
lv = (ListView) rootView.findViewById(R.id.library_list);
adapter = new ArrayAdapter<String>(rootView.getContext(),
android.R.layout.simple_list_item_1, temp);
lv.setAdapter(adapter);
setListener(lv);
tv = (TextView) rootView.findViewById(R.id.library_tv1);
tv.setVisibility(View.GONE);
tv = null;
}
} else {
tv = (TextView) rootView.findViewById(R.id.library_tv1);
tv.setText("No Manga found...");
}
return rootView;
}
#SuppressLint("HandlerLeak")
#Override
public void onResume() {
/*
* Fragment on pause state
*/
super.onResume();
handHF = new Handler(Looper.getMainLooper()) {
#Override
public void handleMessage(Message msg) {
if (msg.what == 0) {
refreshAdapter();
}
}
};
}
private void setListener(ListView lv) {
/*
* Sets listener on listView
*/
lv.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
Intent myIntent = new Intent(view.getContext(),
ChapterActivity.class);
myIntent.putExtra(TITLE, parent.getItemAtPosition(position)
.toString());
startActivity(myIntent);
}
});
lv.setOnItemLongClickListener(new OnItemLongClickListener() {
public boolean onItemLongClick(AdapterView<?> parent, View view,
int position, long id) {
Toast.makeText(view.getContext(),
parent.getItemAtPosition(position).toString(),
Toast.LENGTH_SHORT).show();
return true;
}
});
}
private final List<String> getLibraryList() {
/*
* Returns List<String> of library
*/
List<String> l = new ArrayList<String>();
File dir = new File(Constants.UNDUH);
if (dir.exists()) {
File[] dirs = dir.listFiles();
for (File i : dirs) {
l.add(i.getName());
}
return l;
} else {
return l;
}
}
private void refreshAdapter() {
/*
* It will update library and
*/
synchronized (UIlock) {
getActivity().runOnUiThread(new Runnable() {
public void run() {
if (tv != null) {
tv.setVisibility(View.GONE);
}
library = getLibraryList();
temp = library.toArray(new String[library.size()]);
lv = (ListView) getActivity().findViewById(
R.id.library_list);
adapter = new ArrayAdapter<String>(getActivity(),
android.R.layout.simple_list_item_1, temp);
lv.setAdapter(adapter);
}
});
}
}
}
any advice will be appreciated, thank you!

Update your list of string which you are passing to the ListView in your case you are using
private String[] temp;
Use notifyDataSetChanged Method, just call this after your adapter and it will automatically adds more items to list if your temp[] increments.
like this
adapter = new ArrayAdapter<String>(getActivity(),
android.R.layout.simple_list_item_1, temp);
lv.setAdapter(adapter);
adapter.notifyDataSetChanged();
Where you are adding more data into temp[]
add an extra line
((ArrayAdapter) lv.getAdapter()).notifyDataSetChanged();