Question

我刚按完按钮

播放声音

但是我的声音比“哔”短，短于1秒

如何按下按钮播放声音，直到按下按钮？

<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/adLinear"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fillViewport="true">


    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

        <ListView
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:layout_weight="3" />

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:layout_weight="1"
            android:background="@color/colorAccent">


        </LinearLayout>

    </LinearLayout>

</ScrollView>

Answer 1

使用OnTouchListener

bt.setOnTouchListener(new View.OnTouchListener() {        
@Override
public boolean onTouch(View v, MotionEvent event) {
    switch(event.getAction()) {
        case MotionEvent.ACTION_DOWN: // Button Pressed    
            mp.reset();
            mp.setDataSource(mediapath);
            mp.prepare();
            mp.start();        

            return true; 
        case MotionEvent.ACTION_UP:// Button released
            mp.stop();
            return true; 
    }
    return false;
}
});

Answer 2

您可以使用以下代码：

bt.setOnTouchListener(this);

@Override
public boolean onTouch(View arg0, MotionEvent event) {

    switch (event.getAction() ) { 
    case MotionEvent.ACTION_DOWN: 
        System.out.println("touch");
        mp.setLooping(true);
        mp.start();
        break;
    case MotionEvent.ACTION_UP:
        System.out.println("up");
        mp.pause();
        break; 
    }

    return true;
}

我做了一些研究，发现Android Mediaplayer在循环时播放无间隙声音有问题。

请参阅：Gapless Playback with android MediaPlayer

我也找到了几个解决方案：

使用ogg格式声音文件（https://en.wikipedia.org/wiki/.ogg）
可以使用soundpool，它有一个用于媒体播放的循环和缓存工具（https://developer.android.com/reference/android/media/SoundPool.html）

您还可以使用以下类：查看它是否有效..

    public class LoopMediaPlayer {

    public static final String TAG = LoopMediaPlayer.class.getSimpleName();

    private Context mContext = null;
    private int mResId = 0;
    private int mCounter = 1;

    private MediaPlayer mCurrentPlayer = null;
    private MediaPlayer mNextPlayer = null;

    public static LoopMediaPlayer create(Context context, int resId) {
        return new LoopMediaPlayer(context, resId);
    }

    private LoopMediaPlayer(Context context, int resId) {
        mContext = context;
        mResId = resId;

        mCurrentPlayer = MediaPlayer.create(mContext, mResId);
        mCurrentPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
            @Override
            public void onPrepared(MediaPlayer mediaPlayer) {
                mCurrentPlayer.start();
            }
        });

        createNextMediaPlayer();
    }

    private void createNextMediaPlayer() {
        mNextPlayer = MediaPlayer.create(mContext, mResId);
        mCurrentPlayer.setNextMediaPlayer(mNextPlayer);
        mCurrentPlayer.setOnCompletionListener(onCompletionListener);
    }

    private MediaPlayer.OnCompletionListener onCompletionListener = new MediaPlayer.OnCompletionListener() {
        @Override
        public void onCompletion(MediaPlayer mediaPlayer) {
            mediaPlayer.release();
            mCurrentPlayer = mNextPlayer;

            createNextMediaPlayer();

            Log.d(TAG, String.format("Loop #%d", ++mCounter));
        }
    };
}

使用它只需调用

LoopMediaPlayer.create(context, R.raw.sound_file_name);

mp.setLooping(true);

Android按下按钮可以长时间播放声音

2 个答案: