android 扫描SDCard.

//android 扫描SDCard.

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

//注册

IntentFilter f = new IntentFilter();
f.addAction(Intent.ACTION_MEDIA_SCANNER_STARTED);
f.addAction(Intent.ACTION_MEDIA_SCANNER_FINISHED);
f.addAction(Intent.ACTION_MEDIA_UNMOUNTED);
f.addDataScheme("file");
registerReceiver(mScanListener, f);