CODEWITHSUNDEEP
androidmultithreadingandroid-asynctask
yital9
yital9

Reputation: 6712

Check for working AsyncTask

I have some work to do in the another thread (by doingAsyncTask). Work start when user click on button. But at the same time only one object of doingAsyncTask must do this work, i meen if doingAsyncTask is working, then click on button must not create a new object of doingAsyncTask and execute it, it must wait until work finish. How can i check it?

public class SearchActivity extends Activity {
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //....
    }

    public void onclickButton(View view) {
        new doingAsyncTask().execute();
    }

    public class doingAsyncTask extends AsyncTask<Void, Void, Void> {
    protected Void doInBackground(Void... unused) {
        //doing something
        return(null);
    }

    protected void onProgressUpdate() {
    }
    protected void onPreExecute() {
    }
    protected void onPostExecute() {
    }
   }
}

SOLVED thx all , its works for me

      if(task.getStatus() == AsyncTask.Status.FINISHED)
            task=new ProgressBarShow();
        if(task.getStatus() == AsyncTask.Status.PENDING){
            //task=new ProgressBarShow();
            task.execute();
        }

Upvotes: 4

Views: 14419

Answers (4)

user370305
user370305

Reputation: 109247

Check this AsyncTask.Status

AsyncTask.Status    FINISHED    Indicates that onPostExecute(Result) has finished. 
AsyncTask.Status    PENDING     Indicates that the task has not been executed yet. 
AsyncTask.Status    RUNNING     Indicates that the task is running.

code:

if (doingAsyncTask().getStatus().equals(AsyncTask.Status.FINISHED))
     doingAsyncTask().execute();
else

EDIT:

public class SearchActivity extends Activity {
    doingAsyncTask asyncTask; 

    public void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);             
       // ...
       asyncTask = new doingAsyncTask();   
    }
    public void onclickButton(View view) {
         if(ayncTask.getStatus().equals(AsyncTask.Status.FINISHED) || ayncTask.getStatus().equals(AsyncTask.Status.PENDING)) {
             asyncTask.execute();
         }
         else {
             // do something
         }
    }
    // ...
}

Upvotes: 9

0xC0DED00D
0xC0DED00D

Reputation: 20348

The code could be like this:

doingAsyncTask task;
public void onclickButton(View view) {
    if(task==null){
        task=new doingAsyncTask();
        task.execute();
    }
    else if(task.Status!=RUNNING){
        task=new doingAsyncTask();
        task.execute();
    }
}

Upvotes: 0

Paresh Mayani
Paresh Mayani

Reputation: 128428

You can check the status of AsyncTask => AsyncTask.Status

For example:

    myAsyncTask mtask = new myAsyncTask();
    mtask.execute();

   // write this wherever you want to check status
   if(mtask.getStatus() == AsyncTask.Status.FINISHED){
        // My AsyncTask is done and onPostExecute was called
    }

Upvotes: 2

waqaslam
waqaslam

Reputation: 68187

Use getStatus() of AsyncTask to check its status before setting a new task

Upvotes: 0

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