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POAndroid update TextView in Thread and Runnable
 

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    <p>I want to make a simple timer in Android that updates a TextView every second. It simply counts seconds like in Minesweeper.</p> <p>The problem is when i ignore the tvTime.setText(...) (make it //tvTime.setText(...), in LogCat will be printed the following number every second. But when i want to set this number to a TextView (created in another Thread), the program crashes.</p> <p>Does anyone have an idea how to solve this easily?</p> <p>Here's the code (method is called on startup):</p> <pre><code>private void startTimerThread() { Thread th = new Thread(new Runnable() { private long startTime = System.currentTimeMillis(); public void run() { while (gameState == GameState.Playing) { System.out.println((System.currentTimeMillis() - this.startTime) / 1000); tvTime.setText("" + ((System.currentTimeMillis() - this.startTime) / 1000)); try { Thread.sleep(1000); } catch (InterruptedException e) { e.printStackTrace(); } } } }); th.start(); } </code></pre> <p>EDIT:</p> <p>Finally, I got it. Here is the solution, for those who are interested in.</p> <pre><code>private void startTimerThread() { Thread th = new Thread(new Runnable() { private long startTime = System.currentTimeMillis(); public void run() { while (gameState == GameState.Playing) { runOnUiThread(new Runnable() { @Override public void run() { tvTime.setText(""+((System.currentTimeMillis()-startTime)/1000)); } }); try { Thread.sleep(1000); } catch (InterruptedException e) { e.printStackTrace(); } } } }); th.start(); } </code></pre>
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