for循环中的异步任务进度条

Question

-I have tried to hit web service using Async Task method.

-Here the for loop will dismiss the progress dialog from the first and crashes the Application. Kindly check this code and give suggestions.

Code

for(Pageview pg:views)
{
 value1=url1+"userid="+pg.getuserid()+"&chapterid="+pg.getchapterid()+"&pageno="+pg.getpageno()+"&view%20time="+pg.getviewtime()+"&IMEI%20no="+pg.getimeino()+"&feedback="+pg.getfeedback()+"&Comments="+pg.getcomments();
//Toast.makeText(getApplicationContext(), value1, Toast.LENGTH_LONG).show();
 System.out.println(value1);
// feedbackdata feedback1=new feedbackdata();
 feedbak.execute(value1);
    feedbackdata.loadingProgress = GUIStaticMethod.returnProgressBar(getApplicationContext());

        //myLoginDataFatcher.start();

GUIStaticMethod.mProgressDialog.setOnDismissListener(new OnDismissListener() {

    public void onDismiss(DialogInterface dialog) {



        if(res1.contains("Page View Insertion Successfully")==true)
        {
            Toast.makeText(getApplicationContext(), res1, Toast.LENGTH_LONG).show();

        }
        else if(res1.contains("Page View Insertion Failed")==true)
        {

        }
    }


 });

ERROR

04-02 10:52:34.956: E/AndroidRuntime(234): Uncaught handler: thread main exiting due to uncaught exception
04-02 10:52:34.976: E/AndroidRuntime(234): java.lang.IllegalStateException: Cannot execute task: the task has already been executed (a task can be executed only once)
04-02 10:52:34.976: E/AndroidRuntime(234):  at android.os.AsyncTask.execute(AsyncTask.java:383)
04-02 10:52:34.976: E/AndroidRuntime(234):  at com.example.wireframe.webviewurl$11.onDismiss(webviewurl.java:1751)
04-02 10:52:34.976: E/AndroidRuntime(234):  at android.app.Dialog$ListenersHandler.handleMessage(Dialog.java:1058)
04-02 10:52:34.976: E/AndroidRuntime(234):  at android.os.Handler.dispatchMessage(Handler.java:99)
04-02 10:52:34.976: E/AndroidRuntime(234):  at android.os.Looper.loop(Looper.java:123)
04-02 10:52:34.976: E/AndroidRuntime(234):  at android.app.ActivityThread.main(ActivityThread.java:4363)
04-02 10:52:34.976: E/AndroidRuntime(234):  at java.lang.reflect.Method.invokeNative(Native Method)
04-02 10:52:34.976: E/AndroidRuntime(234):  at java.lang.reflect.Method.invoke(Method.java:521)
04-02 10:52:34.976: E/AndroidRuntime(234):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
04-02 10:52:34.976: E/AndroidRuntime(234):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
04-02 10:52:34.976: E/AndroidRuntime(234):  at dalvik.system.NativeStart.main(Native Method)

Answer 1

Create a new AsyncTask instance for every iteration.

new AsyncTask().execute(value);

The reason being that you cannot execute a thread again, because once the thread is done with the run() method, you cannot restart it. And that's why when you try to restart it, it gives you the IllegalStateException .

Answer 2

You cannot execute same AsyncTask multiple time as exception suggested. Initialize feedback object under the for loop and then execute

According to AsyncTask Threading rules

The task can be executed only once (an exception will be thrown if a second execution is attempted.)

Answer 3

It says: Cannot execute task: the task has already been executed (a task can be executed only once) . That is, you create an AsyncTask, execute it once , and let it be garbage-collected. You cannot call execute() more than once for the same instance.