Android - ProgressBar setVisibility to GONE not working

Question

I\'ve been adding a ProgressBar to the fragments in my app. I\'ve set it up to the two main fragments (used as tabs) as follows:

ProgressBar in

Answer 1

I had a same issue (progressBar.setVisibility() was not working).

As @Illegal Argument said,

// in Activity
ProgressBar mProgressBar = (ProgressBar)findViewById(R.id.progressBar1);
mProgressBar.setVisibility(View.GONE); 

should be working, if that code runs on uiThread(mainThread).

My problem was that I was trying to run the code not on uiThread. So I solved the issue by changing code from

mProgressBar.setVisibility(View.GONE);

to

runOnUiThread(new Runnable() {
    @Override
    public void run() {
        mProgressBar.setVisibility(View.GONE);
    }
});