android開發教程之卸載sd卡對MediaServer的處理

下面這段代碼是android中Music中的處理代碼：

代碼如下：

MediaPlayer.OnErrorListener errorListener = new MediaPlayer.OnErrorListener() {
    public boolean onError(MediaPlayer mp, int what, int extra) {
        switch (what) {
        case MediaPlayer.MEDIA_ERROR_SERVER_DIED:
            mIsInitialized = false;
            mCurrentMediaPlayer.release();
            mCurrentMediaPlayer = new CompatMediaPlayer();
            mCurrentMediaPlayer.setWakeMode(MediaPlaybackService.this, PowerManager.PARTIAL_WAKE_LOCK);
                 mHandler.sendMessageDelayed(mHandler.obtainMessage(SERVER_DIED), 2000);
            return true;
        default:
            Log.d("MultiPlayer", "Error: " + what + "," + extra);
            break;
        }
        return false;
   }
};

簡單來看，就是遇到MediaServer died這種情況，就release掉原來的MediaPlayer,然後重新創建一個MediaPlayer（會在MediaServer重新啟動後關聯起來）。然後可以根據原來的狀態做相應的動作。