// 监听类
private final BroadcastReceiver sdcardListener = new BroadcastReceiver() {


@Override
public void onReceive(Context context, Intent intent) {


String action = intent.getAction();

Log.d("TAG", "sdcard action:::::" + action);
if(Intent.ACTION_MEDIA_MOUNTED.equals(action)
|| Intent.ACTION_MEDIA_SCANNER_STARTED.equals(action)
|| Intent.ACTION_MEDIA_SCANNER_FINISHED.equals(action)

){
// SD卡成功挂载
                

} else if(Intent.ACTION_MEDIA_REMOVED.equals(action)
|| Intent.ACTION_MEDIA_UNMOUNTED.equals(action)
|| Intent.ACTION_MEDIA_BAD_REMOVAL.equals(action)

){
// SD卡挂载失败
                

}


}

};

// 注册监听
    private void registerSDCardListener(){

IntentFilter intentFilter = new IntentFilter(Intent.ACTION_MEDIA_MOUNTED);

intentFilter.addAction(Intent.ACTION_MEDIA_SCANNER_STARTED);

intentFilter.addAction(Intent.ACTION_MEDIA_SCANNER_FINISHED);

intentFilter.addAction(Intent.ACTION_MEDIA_REMOVED);

intentFilter.addAction(Intent.ACTION_MEDIA_UNMOUNTED);

intentFilter.addAction(Intent.ACTION_MEDIA_BAD_REMOVAL);

intentFilter.addDataScheme("file");

registerReceiver(sdcardListener, intentFilter);

}

unregisterReceiver(sdcardListener);