미디어 플레이어 여러개의 트랙 동시에 일시정지하는법 질문입니다

Question

import android.content.Intent;
import android.media.MediaPlayer;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    MediaPlayer[] mediaPlayer = new MediaPlayer[3];

    private Button sound1StartButton;
    private Button sound2StartButton;
    private Button sound3StartButton;
    private Button sound1StopButton;
    private Button sound2StopButton;
    private Button sound3StopButton;

    private Button playpauseButton;

    private boolean isPlaying;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        sound1StartButton = (Button) findViewById(R.id.sound1StartButton);
        sound2StartButton = (Button) findViewById(R.id.sound2StartButton);
        sound3StartButton = (Button) findViewById(R.id.sound3StartButton);
        sound1StopButton = (Button) findViewById(R.id.sound1StopButton);
        sound2StopButton = (Button) findViewById(R.id.sound2StopButton);
        sound3StopButton = (Button) findViewById(R.id.sound3StopButton);

        playpauseButton = (Button) findViewById(R.id.PlayPauseButton) ;

        sound1StopButton.setVisibility(View.INVISIBLE);
        sound2StopButton.setVisibility(View.INVISIBLE);
        sound3StopButton.setVisibility(View.INVISIBLE);
    }

    public void onPlaySound(View v) {
        switch (v.getId()) {
            case R.id.sound1StartButton:
                mediaPlayer[0] = MediaPlayer.create(getApplicationContext(), R.raw.book);

                mediaPlayer[0].start();

                sound1StartButton.setVisibility(View.INVISIBLE);
                sound1StopButton.setVisibility(View.VISIBLE);

                playpauseButton.setText("Pause");

                isPlaying = true;

                break;

            case R.id.sound2StartButton:
                mediaPlayer[1] = MediaPlayer.create(getApplicationContext(), R.raw.silhum);

                mediaPlayer[1].start();

                sound2StartButton.setVisibility(View.INVISIBLE);
                sound2StopButton.setVisibility(View.VISIBLE);

                playpauseButton.setText("Pause");

                isPlaying = true;

                break;


            case R.id.sound3StartButton:
                mediaPlayer[2] = MediaPlayer.create(getApplicationContext(), R.raw.sunburst);

                mediaPlayer[2].start();

                sound3StartButton.setVisibility(View.INVISIBLE);
                sound3StopButton.setVisibility(View.VISIBLE);

                playpauseButton.setText("Pause");

                isPlaying = true;

                break;

        }
    }

    public void onStopSound(View v) {
        switch (v.getId()) {
            case R.id.sound1StopButton:
                //mediaPlayer = MediaPlayer.create(getApplicationContext(), R.raw.book);

                mediaPlayer[0].stop();
                //mediaPlayer.release();

                sound1StartButton.setVisibility(View.VISIBLE);
                sound1StopButton.setVisibility(View.INVISIBLE);

                playpauseButton.setText("Play");

                isPlaying = false;

                break;

            case R.id.sound2StopButton:
                //mediaPlayer = MediaPlayer.create(getApplicationContext(), R.raw.silhum);

                mediaPlayer[1].stop();
                //mediaPlayer.release();

                sound2StartButton.setVisibility(View.VISIBLE);
                sound2StopButton.setVisibility(View.INVISIBLE);

                playpauseButton.setText("Play");

                isPlaying = false;

                break;

            case R.id.sound3StopButton:
                //mediaPlayer = MediaPlayer.create(getApplicationContext(), R.raw.sunburst);

                mediaPlayer[2].stop();
                //mediaPlayer.release();

                sound3StartButton.setVisibility(View.VISIBLE);
                sound3StopButton.setVisibility(View.INVISIBLE);

                playpauseButton.setText("Play");

                isPlaying = false;

                break;
        }
    }

    public void onPlayPause(View v) {
        if (mediaPlayer == null) {
            Toast.makeText(this, "재생 할 것이 없습니다", Toast.LENGTH_SHORT).show();
        } else {
            if (mediaPlayer.isPlaying()) {
                mediaPlayer.pause();
                playpauseButton.setText("Play");
            } else {
                mediaPlayer.start();
                playpauseButton.setText("Pause");
            }
        }
    }
}

if (mediaPlayer.isPlaying()) {
                mediaPlayer.pause();
                playpauseButton.setText("Play");
            } else {
                mediaPlayer.start();
                playpauseButton.setText("Pause"); <<이 조건문을 어떻게 해야 트랙이 동시에 일시정지되고 일시정지된트랙만 재생시킬수 있을까요??

Answer 1

for(int i = 0; i < mediaPlayer.length;i++) {
    MediaPlayer currentMediaPlayer = mediaPlayer[i];
    if (currentMediaPlayer.isPlaying()) {
        currentMediaPlayer.pause();
    } else {
        currentMediaPlayer.start();
    }
}

if(playpauseButton.getText().toString().equal("Play") ) {
    playpauseButton.setText("Pause");
} else {
    playpauseButton.setText("Play");
}