Android：24次點擊后聲音無法播放

Question

因此，我是一名編程初學者，在制作帶有8個按鈕的簡單音板應用程序時，遇到一個奇怪的問題，即在按下24個按鈕后它停止播放聲音。這是Java代碼：

public class MainActivity extends AppCompatActivity {

    MediaPlayer mediaPlayer;
    int i = 0;
    public void playSound(View view){

            switch(view.getId())
            {
                case R.id.button1:
                    mediaPlayer = MediaPlayer.create(this, R.raw.doyouspeakenglish);
                    break;
                case R.id.button2:
                    mediaPlayer = MediaPlayer.create(this, R.raw.goodevening);
                    break;
                case R.id.button3:
                    mediaPlayer = MediaPlayer.create(this, R.raw.hello);
                    break;
                case R.id.button4:
                    mediaPlayer = MediaPlayer.create(this, R.raw.howareyou);
                    break;
                case R.id.button5:
                    mediaPlayer = MediaPlayer.create(this, R.raw.ilivein);
                    break;
                case R.id.button6:
                    mediaPlayer = MediaPlayer.create(this, R.raw.mynameis);
                    break;
                case R.id.button7:
                    mediaPlayer = MediaPlayer.create(this, R.raw.please);
                    break;
                case R.id.button8:
                    mediaPlayer = MediaPlayer.create(this, R.raw.welcome);
                    break;
                default:
                    throw new RuntimeException("Unknown button ID");
            }
            i++;
        Log.i("klik", Integer.toString(i));
            mediaPlayer.start();
    }

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

這是錯誤消息，我不允許以新用戶身份發布圖像，因此這是一個鏈接

Answer 1

您沒有釋放媒體播放器資源，因此也需要關閉並釋放它們。

Releasing the MediaPlayer

public void playSound(View view){
        if (null != mediaPlayer) {
            mediaPlayer.stop();
            mediaPlayer.release();
        }

        switch(view.getId())
        {
            case R.id.button1:
                mediaPlayer = MediaPlayer.create(this, R.raw.doyouspeakenglish);
                break;
            case R.id.button2:
                mediaPlayer = MediaPlayer.create(this, R.raw.goodevening);
                break;
            case R.id.button3:
                mediaPlayer = MediaPlayer.create(this, R.raw.hello);
                break;
            case R.id.button4:
                mediaPlayer = MediaPlayer.create(this, R.raw.howareyou);
                break;
            case R.id.button5:
                mediaPlayer = MediaPlayer.create(this, R.raw.ilivein);
                break;
            case R.id.button6:
                mediaPlayer = MediaPlayer.create(this, R.raw.mynameis);
                break;
            case R.id.button7:
                mediaPlayer = MediaPlayer.create(this, R.raw.please);
                break;
            case R.id.button8:
                mediaPlayer = MediaPlayer.create(this, R.raw.welcome);
                break;
            default:
                throw new RuntimeException("Unknown button ID");
        }
        i++;
    Log.i("klik", Integer.toString(i));
        mediaPlayer.start();
}

Answer 2

請閱讀媒體播放器上的注釋：

使用MediaPlayer完成后，應調用release（）釋放資源。 如果未發布，那么太多MediaPlayer實例將導致異常。

因此，在再次調用MediaPlayer.create之前，只需調用

mediaPlayer.stop();
mediaPlayer.release();