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POHow to change a TextView every second in Android
 

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    <p>I've made a simple Android music player. I want to have a TextView that shows the current time in the song in minutes:seconds format. So the first thing I tried was to make the activity Runnable and put this in run():</p> <pre><code>int position = 0; while (MPService.getMP() != null &amp;&amp; position&lt;MPService.duration) { try { Thread.sleep(1000); position = MPService.getSongPosition(); } catch (InterruptedException e) { return; } // ... convert position to formatted minutes:seconds string ... currentTime.setText(time); // currentTime = (TextView) findViewById(R.id.current_time); </code></pre> <p>But that fails because I can only touch a TextView in the thread where it was created. So then I tried using runOnUiThread(), but that doesn't work because then Thread.sleep(1000) is called repeatedly on the main thread, so the activity just hangs at a blank screen. So any ideas how I can solve this?</p> <hr> <p>new code:</p> <pre><code>private int startTime = 0; private Handler timeHandler = new Handler(); private Runnable updateTime = new Runnable() { public void run() { final int start = startTime; int millis = appService.getSongPosition() - start; int seconds = (int) ((millis / 1000) % 60); int minutes = (int) ((millis / 1000) / 60); Log.d("seconds",Integer.toString(seconds)); // no problem here if (seconds &lt; 10) { // this is hit, yet the text never changes from the original value of 0:00 currentTime.setText(String.format("%d:0%d",minutes,seconds)); } else { currentTime.setText(String.format("%d:%d",minutes,seconds)); } timeHandler.postAtTime(this,(((minutes*60)+seconds+1)*1000)); } }; private ServiceConnection onService = new ServiceConnection() { public void onServiceConnected(ComponentName className, IBinder rawBinder) { appService = ((MPService.LocalBinder)rawBinder).getService(); // start playing the song, etc. if (startTime == 0) { startTime = appService.getSongPosition(); timeHandler.removeCallbacks(updateTime); timeHandler.postDelayed(updateTime,1000); } } </code></pre>
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