i read many similar questions on this thread, but none of them help me... This is my code:
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Spinner spinner = (Spinner) findViewById(R.id.imc_spinner);
// Create an ArrayAdapter using the string array and a default spinner layout
ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this,
R.array.imc_array, android.R.layout.simple_spinner_item);
// Specify the layout to use when the list of choices appears
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
// Apply the adapter to the spinner
spinner.setAdapter(adapter);
}
public void onItemSelected(AdapterView<?> parent, View view, int pos, long id) {
// An item was selected. You can retrieve the selected item using
imc_met = parent.getItemAtPosition(pos).toString();
}
I declare imc_met as public String imc_met;
. The problem is that imc_met does not contain the value of the selected item of the spinner, but it's null...
Where's the problem?
Thx in advance.
Use:
imc_met=Spinner.getSelectedItem().toString();
Instead:
imc_met = parent.getItemAtPosition(pos).toString();
Updated:
Seem you assigning Listener to your spinner not in correct way, do something like below:
spin.setOnItemSelectedListener(new OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
String imc_met=spin.getSelectedItem().toString();
}
@Override
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
}
});
Try this:
imc_met=Spinner.getSelectedItem().toString();
I'm sorry. I forgot
spinner.setOnItemSelectedListener(new OnItemSelectedListener() {
public void onItemSelected(AdapterView<?> parentView, View selectedItemView, int position, long id) {
imc_met=Spinner.getSelectedItem().toString();
}
}
is
imc_met=spinner.getSelectedItem().toString();
not
imc_met=Spinner.getSelectedItem().toString();
int position = Arrays.asList(getResources().getStringArray(R.array.country_value_array)).indexOf(address.getCountry());
这将通过值获得索引。
如果在onCreate()方法中没有定义微调器,则必须使用:
String spinner_value = ((Spinner)findViewById(R.id.spinner1)).getSelectedItem().toString();
在onCreate()
方法中尝试以下代码:
spinner.setOnItemSelectedListener(this);
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