android – 在AsyncTask中获取/使用Context的最佳方法是什么？

内部类：MyActivity.java

public class MyActivity extends Activity {

    // your other methods of the activity here...


    private class myTask extends AsyncTask<Void,Void,Void> {

         protected Void doInBACkground(Void... param) {

             publishProgress(...);  // this will call onProgressupdate();
         }

         protected Void onProgressupdate(Void... prog) {

             Toast.makeText(getActivity(),"text",1000).show(); 
         }
    }
}

构造函数：myTask.java

public class myTask extends AsyncTask<Void,Void> {

     Context c;

     public myTask(Context C) {
          this.c = c;
     }

     protected Void doInBACkground(Void... param) {

          publishProgress(...);  // this will call onProgressupdate();
     }

     protected Void onProgressupdate(Void... prog) {
          Toast.makeText(c,1000).show();
     }
}

此外,请不要忘记在对话框上调用.show().

AlertDialog.builder builder = new AlertDialog.builder(getActivity());
builder.show();