How to use setProgressDrawable() correctly?

Question

I am having problem with setting a new Drawable to my ProgressBar.

If I use the setProgressDrawable() inside onCreate() method it works great. But when I try to call the same method inside a Handler post callback it doesn't work and the progressbar disapears.

Can someone explain this behaviour? How can I solve this problem?

Answer 1

downloadingBar.setProgress(0); 

Drawable progressDrawable = getResources().getDrawable(R.drawable.download_progressbar_pause_bg);

progressDrawable.setBounds(downloadingBar.getProgressDrawable().getBounds()); 

downloadingBar.setProgressDrawable(progressDrawable); 

downloadingBar.setProgress(mCurrentPercent);  

1. First you should reset the progress to zero
2. Set the progress drawable bounds
3. Set new progress drawable
4. Set new progress