A small example of how Android gets thumbnails of images and videos on the SD card

How to determine files? You can use Cursor to traverse the database and compare the value of the INTERNAL_CONTENT_URI field. This is a Uri, which stores the complete path of the multimedia file on the Android mobile phone SD card.

[Java]

Copy codeThe Code is as follows: Uri originalUri = MediaStore. Images. Media. EXTERNAL_CONTENT_URI;
// If it is a Video, it is MediaStore. Video. Media. EXTERNAL_CONTENT_URI;
ContentResolver cr = this. getContentResolver ();
Cursor cursor = cr. query (originalUri, null );
If (cursor = null ){
Return;
}
For (cursor. moveToFirst ();! Cursor. isAfterLast (); cursor. moveToNext ()){
Long thumbNailsId = cursor. getLong (cursor. getColumnIndex ("_ ID "));
Bitmap bitmap = MediaStore. Images. Thumbnails. getThumbnail (cr,
ThumbNailsId, Video. Thumbnails. MICRO_KIND, null );
// If it is a video, it is
// Bitmap bitmap = MediaStore. Video. Thumbnails. getThumbnail (cr,
// ThumbNailsId, Video. Thumbnails. MICRO_KIND, null );
Return bitmap;
}

Uri originalUri = MediaStore. Images. Media. EXTERNAL_CONTENT_URI;
// If it is a Video, it is MediaStore. Video. Media. EXTERNAL_CONTENT_URI;
ContentResolver cr = this. getContentResolver ();
Cursor cursor = cr. query (originalUri, null );
If (cursor = null ){
Return;
}
For (cursor. moveToFirst ();! Cursor. isAfterLast (); cursor. moveToNext ()){
Long thumbNailsId = cursor. getLong (cursor. getColumnIndex ("_ ID "));
Bitmap bitmap = MediaStore. Images. Thumbnails. getThumbnail (cr,
ThumbNailsId, Video. Thumbnails. MICRO_KIND, null );
// If it is a video, it is
// Bitmap bitmap = MediaStore. Video. Thumbnails. getThumbnail (cr,
// ThumbNailsId, Video. Thumbnails. MICRO_KIND, null );
Return bitmap;
}