启动MediaScanner服务，扫描媒体文件，程序通过发送下面的Intent启动MediaScanner服务。
扫描指定文件
public void scanFile(Context ctx, String filePath) {
Intent scanIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
scanIntent.setData(Uri.fromFile(new File(filePath)));
ctx.sendBroadcast(scanIntent);
}
扫描指定目录
public static final String ACTION_MEDIA_SCANNER_SCAN_DIR = "android.intent.action.MEDIA_SCANNER_SCAN_DIR";
public void scanDirAsync(Context ctx, String dir) {
Intent scanIntent = new Intent(ACTION_MEDIA_SCANNER_SCAN_DIR);
scanIntent.setData(Uri.fromFile(new File(dir)));
ctx.sendBroadcast(scanIntent);
}
扫描Sallery
public void sdScan(){
sendBroadcast(new Intent(Intent.ACTION_MEDIA_MOUNTED, Uri.parse("file://"
+ Environment.getExternalStorageDirectory())));
}