asynctask取消onpostexecute [英] asynctask cancel onpostexecute

问题描述

我尝试在"doInBackground"中捕获，如果应用程序在"doInBackground"中执行catch方法，则我不希望代码运行onPostExecute.代码如下:

i have a try and catch in "doInBackground", i dont wan the code be run the onPostExecute if the apps execute catch method in "doInBackground". code as below:

public class DownloadFileAsync extends AsyncTask<String, Integer, Void> {
        @Override
        protected void onPreExecute(){
             super.onPreExecute();
     }

    @Override
    protected Void doInBackground(String... aurl) {
        try{
           //some code, jump to onPostexecute after complete
        }
        catch{
            //some code, don't do onPostExecute after complete
        }
        return null;

        }

    @Override
    protected void onProgressUpdate(Integer... progress) {          
    //some code
    }

    @Override
    protected void onPostExecute(Void unused) {
    //some code
    }
}

推荐答案

将布尔值数据类型从AsyncTask的doInBackground()返回到onPostExecute().并检查其值，您想要成功完成什么，

Return boolean data type from your doInBackground() to onPostExecute() of your AsyncTask. And check for its values what you want to do for success,

@Override
    protected boolean doInBackground(String... aurl) {
        try{
           //some code, jump to onPostexecute after complete

         return true;
        }
        catch{
            //some code, don't do onPostExecute after complete

        return false;
        }   
      }

和

@Override
    protected void onPostExecute(boolean flag) {
    if(flag)
     {
      //some code
     }
    }

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