Play and Pause using the same button

Question

I want to make it only one button that has two function. First click I want to play it and second click I want to pause it. And when I click it again It continues where it left off.

JAVA SIDE;

MediaPlayer ocean;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_sound);
    ocean=MediaPlayer.create(Sound.this,R.raw.ocean);
}
public void play(View v){
    ocean.start();
}
public void pause(View V){
    ocean.pause();
}}

ACTIVITY SIDE:

 <Button
    android:id="@+id/play"
    android:layout_width="165dp"
    android:layout_height="0dp"
    android:layout_marginBottom="285dp"
    android:background="@drawable/oceansound"
    android:onClick="play"
    android:text=""/>

Answer 1

Use a flag that indicates if the player is on or off:

Boolean isOn = false;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_sound);
    ocean=MediaPlayer.create(Sound.this,R.raw.ocean);
}
public void play(View v){
    if (!isOn) {
        ocean.start();
        isOn = true;
    } else {
        ocean.pause();
        isOn = false;
    }
}
}