Timer t = new Timer();
t.scheduleAtFixedRate(new TimerTask() {
public void run() {
// TODO Auto-generated method stub
Log.i("first iteration","first iteration");
btn1.setTextColor(Color.rgb((int)(Math.random()*255), (int)(Math.random()*255), (int)(Math.random()*255)));
Log.i("iterating","iteratinggggggggg");
}
}, 0, 1000);
in Logcat:
01-07 02:39:09.789: I/first iteration(16568): first iteration
01-07 02:39:09.789: I/iterating(16568): iteratinggggggggg
01-07 02:39:10.781: I/first iteration(16568): first iteration
which means that btn1.setTextColor(...)
is executing only once ! I would like the Button Text to be changed every 1 second .
Any expert can help?
Thank to Ole I could find out a solution for my problem that I would like to share with you:
SOLUTION:
// UPDATING BTN TEXT DYNAMICALLY
Runnable myRunnableUpdater = new Runnable()
{
public void run() {
colorGenerator();
hd.postDelayed(myRunnableUpdater, 1000);
}
};
void startRepeatingTask()
{
myRunnableUpdater.run();
}
void stopRepeatingTask()
{
hd.removeCallbacks(myRunnableUpdater);
}
private void colorGenerator() {
btn1.setTextColor(Color.rgb((int)(Math.random()*255), (int)(Math.random()*255), (int)(Math.random()*255)));
}
//END OF UPDATING BTN TEXT DYNAMICALLY!!
1)Do not forget to declare Handler hd
2)Also, hd = new Handler()
in onCreate()
3) Use startRepeatingTask()
wherever you desire your repetitive code to be repeated.
4) Use stopRepeatingTask()
wherever you desire to stop repeating.
Cheers! ;)
Your application is force-closing because you are trying to update UI elements from a thread created by the Timer
. Only the main thread is allowed to update the UI. This can be solved using a Handler
Have a look at this answer on how to implement this.
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