I found the Answer:
first: I implemented OnPageChangeListener
so I can create the sound on OnPageSelected method
second: I reset the sound then create it and finally start it
ex (on the OnPageSelected) method:
case 1:
if (soundplayer1.isPlaying()) {
soundplayer1.stop();
// soundplayer1.release();
} else {
soundplayer2.reset();
soundplayer2 = MediaPlayer.create(this, R.raw.soundtest);
soundplayer2.start();
}
soundplayer2.reset();
soundplayer2 = MediaPlayer.create(this, R.raw.soundtest);
soundplayer2.start();
Log.i("pageSelected", "start");
break;