Android AsyncTask问题

Question

我有一个要使用 AsyncTask 类更新的字符串这是我的代码:

public class MainActivity extends Activity{

private String str = "oldString";

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        getString();
        }
       private void getString(){
              new CustomTask().execute();
       }

     private class CustomTask extends AsyncTask<Void, Void, String>{

          @Override
          protected String doInBackground(Void... params) {
           // TODO Auto-generated method stub
           Log.i("Lesson3", "doInBackground method");
           str = "newString";
           return "someString";
          }

          protected void onPostExecute(String s){
           Log.i("Lesson3", "onPostExecute method");

          }

}

没有调用 onPostExecute 方法，这就是问题所在？？

谢谢

Answer 1

答案很简单，

@Override
protected void onPostExecute(String s){
       Log.i("Lesson3", "onPostExecute method");
}

您忘记了父类(super class)的 @Override 执行调用 onPostExecute，因为它还没有被覆盖。