我读了这个线程很多类似的问题,但没有人帮助我... 这是我的code:
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();
}
我宣布imc_met为公共字符串imc_met;
。问题是,imc_met不包含微调选定项的值,但它是空...
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...
在哪里的问题?
THX提前。
使用:
imc_met = Spinner.getSelectedItem()的toString();
imc_met=Spinner.getSelectedItem().toString();
相反:
imc_met = parent.getItemAtPosition(POS)的ToString();
imc_met = parent.getItemAtPosition(pos).toString();
更新:
好像你指定监听到你的微调不正确的方法,像做如下:
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
}
});