使用ContentObserver监听数据库变化

监控数据库必须继承ContentObserver类;

class MusicContentObserver extends ContentObserver{

public MusicContentObserver(Handler handler) {

super(handler);

}

@Override

public void onChange(boolean selfChange) {

//数据库变化时

super.onChange(selfChange);

ScanSdcardUtils.this.startScanSdcard();

}

}

//监听数据库

public void startListenMusic(){

MusicContentObserver musicContentObserver=new MusicContentObserver(new Handler());

mContext.getContentResolver().registerContentObserver(MediaStore.Audio.Media.EXTERNAL_CONTENT_URI, true, musicContentObserver);

}