Question

在我的秒表应用程序中，我有一个开始按钮来启动声音，还有一个暂停按钮来停止或暂停声音。

如果仅按下开始按钮一次，声音的开始和暂停工作正常，那么通过按暂停可以很好地停止声音太

但是多次按开始按钮时会出现问题。我按下开始按钮越多，声音就越快。然后 PAUSE 按钮永远不会停止声音。所以，这是一个错误！导致这种情况的原因以及如何在我的代码中解决它？

[注意：只有在多次点击START按钮时才会出现问题]

    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();
}

为什么我的PAUSE按钮不会停止MediaPlayer声音？

1 个答案: