重试AsyncTask

Question

例如,我有以下AsyncTask:

  private class MyAsyncTask extends AsyncTask<Void, Void, Boolean> {


     @Override
     protected Void doInBackground(Void... params) {
         try {
             //some code that may throws exception
             return true;
         } catch (IOException ex) {
             return false;
         }
     }


     @Override
     protected void onPostExecute(Boolean param){
        if (!param) {
           AlertDialog.Builder builder = new AlertDialog.Builder(MyActivity.this);
           builder.setMessage("Error");
           builder.setPositiveButton("Retry", new DialogInterface.OnClickListener() {
              public void onClick(DialogInterface dialog, int which) {
                  //I want to retry MyAsyncTask here
              } 
           });
           builder.setNegativeButton("Exit", new DialogInterface.OnClickListener() {
              public void onClick(DialogInterface dialog, int which) {
                 finish();
              } 
           });
           AlertDialog alert = builder.create();
           alert.show();
        }
     }
  }

这样做的最佳做法是什么？我害怕递归此代码.

Answer 1

你不能严格"重试"一个实例AsyncTask.您必须创建一个新实例并执行它,就像您执行第一个实例一样.你不应该遇到递归问题.