Question

    public class uploadActivity extends Activity  implements OnClickListener {
    protected void onCreate(Bundle savedInstanceState)
    { 
         Spinner spinner = (Spinner) findViewById(R.id.spinner_list);

        // Create an ArrayAdapter using the string array and a default spinner layout
        ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this,
        R.array.spinner_arrays, 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) {
     Toast.makeText(parent.getContext(), "Selected entry in spinner is : " +       parent.getItemAtPosition(pos).toString(), Toast.LENGTH_SHORT).show();
}

      public void onNothingSelected(AdapterView<?> parent) {

}

}

我正在尝试将微调器添加到我的类活动中但是在我的项目中有4个按钮我需要实现OnClickListener并且我已经完成了它的功能所以我不能将onclicklistener更改为OnItemSelectedListener并且我正在尝试下面的方法但是因为我还没有实现OnItemSelectedListener。当我点击条目时不会调用像onItemSelected这样的方法，所以如何在dis case中实现

谢谢

Answer 1

试试这个..

spinner.setOnItemSelectedListener(new OnItemSelectedListener() {
        @Override
        public void onItemSelected(AdapterView<?> arg0, View v,
                int position, long id) {
            Log.v("SpinnerSelected Item",
                    "" + spinner.getSelectedItem());
            Log.v("Clicked position",""+position);
        }

        @Override
        public void onNothingSelected(AdapterView<?> arg0) {
            Log.v("NothingSelected Item",
                    "" + spinner.getSelectedItem());
        }
    });

或者，您可以使用如下

public class uploadActivity extends Activity implements OnClickListener,OnItemSelectedListener{

如何在没有工具的情况下在android中实现微调器？

1 个答案: