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Getting Called From Wrong Thread Exception


Getting Called From Wrong Thread Exception

By : jaeyoung.kim
Date : November 21 2020, 11:01 PM
this will help I have activity which creates Thread to communicate with server. This thread every few seconds receives a String. I would like to add this String to list and display in activity (in ListView) but I'm getting CalledFromWrongThreadException when trying to do that. , Switch back to the UI thread before you manipulate the list.
code :
      list.post (new Runnable()
      {
        @Override public void run() 
        {
          String dataFromServer = networkManager.receiveData();
          list.add(dataFromServer);
          adapter.notifyDataSetChanged();
        }
      });


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Called From Wrong Thread Exception

Called From Wrong Thread Exception


By : user3047805
Date : March 29 2020, 07:55 AM
like below fixes the issue I am getting an exception here when I try to bring another view to the front. It happens in the last method of my BoardView class where it says if(lives == 0). Can anybody see where I should be calling this bringToFront method from?? , You need to run the bring to front on the right thread. Try this:
code :
final View v = ((BoardView) getParent()).findViewById(1);
v.post(new Runnable(){ public void run(){ v.bringToFront(); } });
called from wrong Thread Exception

called from wrong Thread Exception


By : P. Olin
Date : March 29 2020, 07:55 AM
To fix this issue Try to implement a AsyncTask to get the String from the document ( in the doInBackground ) then use the onPostExecute to set the Text on the TextViews.
Is is the best method on doing background logic without blocking the UI thread.
Called From Wrong Thread Exception with AsyncTask

Called From Wrong Thread Exception with AsyncTask


By : dmurphi
Date : March 29 2020, 07:55 AM
wish help you to fix your issue Try wrapping your file access code with runOnUIThread(new Runnable{/*code goes here*/}())
app crashing with "Called From Wrong Thread Exception"

app crashing with "Called From Wrong Thread Exception"


By : Samar Saleh
Date : March 29 2020, 07:55 AM
it helps some times I added this part of the code in my onCreate() method and it crashes my app. need help.
code :
Only the UI thread that created a view hierarchy can touch its views.
 Timer t = new Timer();
 t.schedule(new TimerTask() {
 public void run() {
        timerInt++;
        Log.d("timer", "timer");

        runOnUiThread(new Runnable() {
            @Override
            public void run() {
                timerDisplayPanel.setText("Time =" + timerInt + "Sec");
            }
        });

    }
}, 10, 1000);
How Android handles "called from wrong thread" exception

How Android handles "called from wrong thread" exception


By : Александр Шведов
Date : March 29 2020, 07:55 AM
will be helpful for those in need Looking at one of those stacktraces it appears that all calls that modify(invalidating the View and making it to need a redraw) a View ends up in the android.view.ViewRootImpl class which is:
The top of a view hierarchy, implementing the needed protocol between View and the WindowManager.
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