我读了这个线程很多类似的问题,但没有人帮助我。这是我的代码:
@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作为public String imc_met;
。 问题是,imc_met不包含微调的所选项目的价值,但它是空...
哪里的问题呢?
THX提前。
使用:
。imc_met = Spinner.getSelectedItem()的toString();
代替:
imc_met = parent.getItemAtPosition(POS)的ToString();
更新:
似乎你在正确的方式分配监听到你的微调不是,这样做如下:
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
}
});
试试这个:
imc_met=Spinner.getSelectedItem().toString();
对不起。 我忘了
spinner.setOnItemSelectedListener(new OnItemSelectedListener() {
public void onItemSelected(AdapterView<?> parentView, View selectedItemView, int position, long id) {
imc_met=Spinner.getSelectedItem().toString();
}
}
是
imc_met=spinner.getSelectedItem().toString();
不
imc_met=Spinner.getSelectedItem().toString();
int position = Arrays.asList(getResources().getStringArray(R.array.country_value_array)).indexOf(address.getCountry());
这将通过价值得到指数。
如果微调没有在的onCreate()方法定义然后必须使用此:
String spinner_value = ((Spinner)findViewById(R.id.spinner1)).getSelectedItem().toString();
试试这个代码在你onCreate()
方法:
spinner.setOnItemSelectedListener(this);
文章来源: Android - How to get the selected item value from a spinner and put it into a string?