app crashing with "Called From Wrong Thread Exception"
Only the UI thread that created a view hierarchy can touch its views.You are trying to change the text of the UI element in Non UI Thread, so it gives exception.Use runOnUiThread
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);