音乐播放器动画的相关优化修改。

问题点：原始版本在onCreate时就立刻播放动画，无法灵活的停止音乐的动画效果。

更改方式：动画的更新需要独立封装，点击播放就进行动画展示，点击暂停就进行暂停。

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旧代码：StoryViewController.class

mContext.runOnUiThread(new Runnable() {

@Override

public void run() {

Animation rotateAnimation = new RotateAnimation(0, 360, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);

rotateAnimation.setDuration(10000);

rotateAnimation.setFillAfter(true);

rotateAnimation.setRepeatCount(Animation.INFINITE);

rotateAnimation.setInterpolator(mContext, android.R.anim.linear_interpolator);//设置动画插入器

mRotate.startAnimation(rotateAnimation);//立即执行动画

}

});

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新代码： StoryViewController.class

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上面问题涉及到的知识点：自定义接口，当音乐状态更新时进行回调，更新UI. (接口的定义方式)

1: StoryViewController.class

注册：

playerManager.setmOnPlayerStatusListener(mStatusListener);

回调：

private IMediaPlayerStatusListener mStatusListener = new IMediaPlayerStatusListener() {

@Override

public void onPlay() {

mPlayState.setBackgroundResource(R.drawable.music_start_selector);

rotateAnimation.startNow();

}

@Override

public void onPause() {

mPlayState.setBackgroundResource(R.drawable.music_pause_selector);

rotateAnimation.cancel();

}

};

2: MediaPlayerManager.class

public void setmOnPlayerStatusListener(IMediaPlayerStatusListener statusListener) {

this.mOnPlayerStatusListener = statusListener;

}

//当音乐状态更新时进行回调，更新UI.

public void pause() {

if (isPlaying()) {

try {

mMediaPlayer.pause();

} catch (IllegalStateException e) {

LogUtils.d(TAG, "pause() an Error has occur..." + e.getMessage());

}

}

if (mOnPlayerStatusListener != null) {

mOnPlayerStatusListener.onPause();

}

}

3：接口定义

public interface IMediaPlayerStatusListener {

voidonPlay();

voidonPause();

}