Java如何显示然后隐藏（GONE）视图-Android

Question

I am developing an APP in Android Studio (cause I'm not a Java pro-just learning...) I am not sure if my code is not working-which it looks like it is not to me. Can anyone lend a hand?

I have a music file that when it plays I won't to show the progress bar-THEN hide it with visibility (GONE). Everything works just fine, except I cant' get the VISIBILITY to change if (!mediaPlayer.isPlaying)...

Basically after the 10-seconds of audio plays the progress bar needs to change the view back to gone.

   final ProgressBar Pbar;
   Pbar = (ProgressBar) findViewById(R.id.progressBar);

   final MediaPlayer mediaPlayer = MediaPlayer.create(this, 
   R.raw.soundttt);
    Button playsound = (Button) this.findViewById(R.id.play_sound_ten);
    playsound.setOnClickListener(new View.OnClickListener(){
        @Override
        public void onClick(View v) {
            mediaPlayer.start();
            if (mediaPlayer.isPlaying()) {
                Pbar.setVisibility(View.VISIBLE);
            }
            else if (!mediaPlayer.isPlaying()){
                Pbar.setVisibility(View.GONE);
            }
        }

    });

I have been trying for three days, have done my fair share of reading including the numerous threads on MediaPlayer.

StackOverFlow 1 Any help would be appreciated! Thank you in advance!

Answer 1

else if (!mediaPlayer.isPlaying()){
    Pbar.setVisibility(View.GONE);
}

Above code will be executed immediately after media player has started playing. This condition will be false, as a result view's visibility is not impacted.

If you wan't to toggle the Visibility after 10 seconds, do it using Handler as follows:

 new Handler().postDelayed(new Runnable() {
     @Override
     public void run() {
         Pbar.setVisibility(View.GONE);
     }
 },10000);