Android 扫描SDCard下的音乐文件以及监听扫描事件

广播接收机代码：

public class ScanSdReceiver extends BroadcastReceiver    {        @Override          public void onReceive(Context context, Intent intent)        {        	String action = intent.getAction();            if (Intent.ACTION_MEDIA_SCANNER_STARTED.equals(action))            {            	//开始扫描，把你的代码放这里            }            else if (Intent.ACTION_MEDIA_SCANNER_FINISHED.equals(action))            {            	//扫描结束，把你的代码放这里            }        }    }

注册广播接收机，监听SDcard扫描事件

IntentFilter intentfilter = new IntentFilter(Intent.ACTION_MEDIA_SCANNER_STARTED);intentfilter.addAction(Intent.ACTION_MEDIA_SCANNER_FINISHED);  intentfilter.addDataScheme("file");  ScanSdReceiver scanSdReceiver = new ScanSdReceiver();registerReceiver(scanSdReceiver, intentfilter);

扫描SDCard

sendBroadcast(new Intent(Intent.ACTION_MEDIA_MOUNTED,    Uri.parse("file://" + Environment.getExternalStorageDirectory().getAbsolutePath())));