如何知道在android中是否选择了微调器项目？

Question

我怎么知道在android中是否选择了微调器中的项？

Answer 1

请参见此处:http: //developer.android.com/resources/tutorials/views/hello-spinner.html

你必须实现一个OnItemSelectedListener.

这里是链接的例子:

public class MyOnItemSelectedListener implements OnItemSelectedListener {

    public void onItemSelected(AdapterView<?> parent,
        View view, int pos, long id) {
      Toast.makeText(parent.getContext()), "The planet is " +
          parent.getItemAtPosition(pos).toString(), Toast.LENGTH_LONG).show();
    }

    public void onNothingSelected(AdapterView parent) {
      // Do nothing.
    }
}

spinner.setOnItemSelectedListener(new MyOnItemSelectedListener());

如果您不想为侦听器显式声明类,也可以使用匿名内部方法.