android 獲取.thumbnail文件下的小圖標

今天用到了個獲取android  .thumbnail文件下的小圖標的需求。弄了好久，終於出來了，同大家分享下！

public static Bitmap getThumbnail(Activity activity, String path) {
     ContentResolver resolver = activity.getContentResolver();
     Cursor cursor = activity.managedQuery(Images.Media.EXTERNAL_CONTENT_URI,
    new String[] {Images.Media._ID},
    "LOWER(" + Images.Media.DATA + ")" + "=?",
    new String[] {path.toLowerCase()},
    Images.Media.DEFAULT_SORT_ORDER);
     long origId = 0;
     if (cursor.moveToNext()) {
      origId = cursor.getLong(0);
  }
  return Thumbnails.getThumbnail(resolver, origId, Thumbnails.MICRO_KIND, null);
 }