Delete photo thumbnail in Gallery after manually delete the photo file

问题

case R.id.menu_delete:
    File photoToDelete = new File(photoPath, photoList[gPosition]);
    photoToDelete.delete();
    checkPhotoFolder();
    galleryAdapter.notifyDataSetChanged();
    Log.d("position", "" + gPosition);
    return true;

I'm manually delete a photo file using above code. But in the system gallery the photo still show the blank thumbnail. The question is how can I delete the photo file and also the thumbnail of it in the gallery?

回答1:

Try invoke the MediaScanner to refresh the gallery

// Tell the media scanner about the new file so that it is
// immediately available to the user.
MediaScannerConnection.scanFile(this,
        new String[] { file.toString() }, null,
        new MediaScannerConnection.OnScanCompletedListener() {
    public void onScanCompleted(String path, Uri uri) {
        Log.i("ExternalStorage", "Scanned " + path + ":");
        Log.i("ExternalStorage", "-> uri=" + uri);
    }
});

Code from Google's example

回答2:

Try this.

getContentResolver().delete(Uri.fromFile(photoToDelete), null, null);

回答3:

You must update the data structure (eg. list or array) that stores the photos. I guess it is photoList. So you should do (assuming photoList is an array):

photoList = photoList.asList().remove(gPosition).toArray();

来源：https://stackoverflow.com/questions/13532285/delete-photo-thumbnail-in-gallery-after-manually-delete-the-photo-file