[英]Spinner doesn't work setOnItemSelectedListener
Onitemselectedlistener
does not work when I select data in spinner
. 当我在spinner
选择数据时, Onitemselectedlistener
不起作用。 I am not sure what's up? 我不确定是怎么回事?
The data I choose is unreadable. 我选择的数据不可读。 How can I read the data I chose in spinner
? 如何读取spinner
选择的数据? This version of the code does not work, the selected data does not appear. 此版本的代码不起作用,所选数据不会出现。
public class MainActivity extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener, AdapterView.OnItemSelectedListener, View.OnTouchListener {
private Spinner spinner;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
spinner = (Spinner) findViewById(R.id.spinnerMain);
ArrayAdapter < String > adapterSpinner = new ArrayAdapter < String > (MainActivity.this,
android.R.layout.simple_spinner_item, Rooms);
adapterSpinner.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(adapterSpinner);
spinner.setOnItemSelectedListener(MainActivity.this);
adapterSpinner.notifyDataSetChanged();
final AdapterView.OnItemSelectedListener listener = new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView < ? > adapterView, View view, int i, long l) {
switch (i) {
case 0:
break;
case 1:
break;
case 2:
break;
}
}
@Override
public void onNothingSelected(AdapterView < ? > adapterView) {
}
};
final Spinner spnLocale = (Spinner) findViewById(R.id.spinnerMain);
spnLocale.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
public void onItemSelected(AdapterView < ? > adapterView, View view, int i, long l) {
Toast.makeText(MainActivity.this, "Selected", Toast.LENGTH_SHORT).show();
spnLocale.setOnItemSelectedListener(listener);
}
public void onNothingSelected(AdapterView < ? > adapterView) {
return;
}
});
// ...
}
// ...
}
You have already taken the global spinner at the top. 您已经将全球微调器置于顶部。 Implement listener for that like this - 像这样实现监听器-
spinner.setOnItemSelectedListener(new
AdapterView.OnItemSelectedListener() {
public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {
Toast.makeText(MainActivity.this, "Selected", Toast.LENGTH_SHORT).show();
spinner.setOnItemSelectedListener(listener);
}
public void onNothingSelected(AdapterView<?> adapterView) {
return;
}
});
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