android - android音乐播放器项目中的前进、后退按钮

Question

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Answer 1

快进歌曲:

public void forwardSong() {
    if (mPlayer != null) {
        int currentPosition = mPlayer.getCurrentPosition();
        if (currentPosition + seekForwardTime <= mPlayer.getDuration()) {
            mPlayer.seekTo(currentPosition + seekForwardTime);
        } else {
            mPlayer.seekTo(mPlayer.getDuration());
        }
    }
}

倒带歌曲:

public void rewindSong() {
    if (mPlayer != null) {
        int currentPosition = mPlayer.getCurrentPosition();
        if (currentPosition - seekBackwardTime >= 0) {
            mPlayer.seekTo(currentPosition - seekBackwardTime);
        } else {
            mPlayer.seekTo(0);
        }
    }
}

mPlayer是MediaPlayer的对象。

seekForwardTime 和 seekBackwardTime 是两个变量，用于在定义的秒内前进或后退歌曲。

private int seekForwardTime = 5 * 1000; // default 5 second
private int seekBackwardTime = 5 * 1000; // default 5 second

希望这会有所帮助...