i want to use one same button to play and pause.First click I want to play it & second click I want to pause it

Question

And when I click it again I want to play it. Here is my code but it's not working as when i click the button again and again is starts repeating the same audio again and again instead of pausing is. Please help me

Button button_attention = (Button)findViewById(R.id.button_one);
        button_attention.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                 player=MediaPlayer.create(MainActivity.this, R.raw.alarm_effect);
                {
                    if (player.isPlaying()){
                        player.stop();}
                    else {
                        player.start();
                    }
                }

Answer 1

You are re-defining the media player inside of the on-click handler each time that it is called, therefore it will not work. You need to move the definition outside of the on-click handler and then reference it from within.

//Move it to here
player=MediaPlayer.create(MainActivity.this, R.raw.alarm_effect);

Button button_attention = (Button)findViewById(R.id.button_one);
    button_attention.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
                if (player.isPlaying()){
                    //This maybe should be pause.
                    player.stop();
                }
                else {
                    player.start();
                }

EDIT: Further to your comment regarding how to use this for multiple tracks, you should do something like the following.

Implement a method, such as the following:

private void changeTrack(int resourceId){
    player = MediaPlayer.create(MainActivity.this, resourceId);
}

Simply call this method when you wish to change the track using:

changeTrack(R.raw.MEDIA_NAME);