为什么我的 PAUSE 按钮不能停止 MediaPlayer 的声音？

Question

在我的秒表应用程序中，我有一个 Start 按钮来启动声音，还有一个 Pause 按钮来停止或暂停声音。

如果只按一次开始按钮，声音的开始和暂停工作正常，然后按暂停[可以很好地停止声音=27=] 也是。

但是当 开始 按钮被按下多次时就会出现问题。我越按 Start 按钮，声音运行得越快。然后 PAUSE 按钮永远不会停止声音。所以，这是一个错误！是什么原因导致的以及如何在我的代码中解决它？

[注意：仅当多次单击“开始”按钮时才会出现此问题]

    public class MainActivity extends Activity {

    private Button startButton;
    private Button pauseButton;
    private Button resetButton;
    private TextView timerValue;

    private long startTime = 0L;

    private Handler customHandler = new Handler();

    long timeInMilliseconds = 0L;
    long timeSwapBuff = 0L;
    long updatedTime = 0L;
    private MediaPlayer mp;


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

        timerValue = (TextView) findViewById(R.id.timerValue);

        startButton = (Button) findViewById(R.id.startButton);

        startButton.setOnClickListener(new View.OnClickListener() {

            public void onClick(View view) {
                startTime = SystemClock.uptimeMillis();
                customHandler.postDelayed(updateTimerThread, 0);
                mp = MediaPlayer.create(getApplicationContext(), R.raw.sound);
                mp.start();
                mp.setLooping(true);

            }
        });

        pauseButton = (Button) findViewById(R.id.pauseButton);

        pauseButton.setOnClickListener(new View.OnClickListener() {

            public void onClick(View view) {

                timeSwapBuff += timeInMilliseconds;
                customHandler.removeCallbacks(updateTimerThread);
                mp.stop();

            }
        });
        resetButton = (Button) findViewById(R.id.reset);


        resetButton.setOnClickListener(new View.OnClickListener() {

            public void onClick(View view) {

                timerValue.setText("" + 00 + ":"
                        + String.format("%02d", 00) + ":"
                        + String.format("%03d", 00));
                startTime = SystemClock.uptimeMillis();
                timeSwapBuff = 0;

            }
        });

    }

    private Runnable updateTimerThread = new Runnable() {

        public void run() {

            timeInMilliseconds = SystemClock.uptimeMillis() - startTime;

            updatedTime = timeSwapBuff + timeInMilliseconds;

            int secs = (int) (updatedTime / 1000);
            int mins = secs / 60;
            secs = secs % 60;
            int milliseconds = (int) (updatedTime % 1000);
            timerValue.setText("" + mins + ":"
                    + String.format("%02d", secs) + ":"
                    + String.format("%03d", milliseconds));
            customHandler.postDelayed(this, 0);
        }

    };
}

Answer 1

在您的停止按钮中尝试此代码。

if(mp.isPlaying())
{
mp.stop();
mp.reset();
}

如果您想暂停媒体播放器

if(mp.isPlaying())
{
mp.pause();
}