Android Question Check directory or image is synced with gallery

[Alexander Stolte]

how can i check if a directory or image is synchronized with the gallery?
i want to avoid showing unwanted folders.

 

[Alexander Stolte]

What about MediaStore?
I have this Java code:

/**
     * @return
     * gets all folders with pictures on the device and loads each of them in a custom object imageFolder
     * the returns an ArrayList of these custom objects
     */
    private ArrayList<imageFolder> getPicturePaths(){
        ArrayList<imageFolder> picFolders = new ArrayList<>();
        ArrayList<String> picPaths = new ArrayList<>();
        Uri allImagesuri = android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
        String[] projection = { MediaStore.Images.ImageColumns.DATA ,MediaStore.Images.Media.DISPLAY_NAME,
                MediaStore.Images.Media.BUCKET_DISPLAY_NAME,MediaStore.Images.Media.BUCKET_ID};
        Cursor cursor = this.getContentResolver().query(allImagesuri, projection, null, null, null);
        try {
            if (cursor != null) {
                cursor.moveToFirst();
            }
            do{
                imageFolder folds = new imageFolder();
                String name = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DISPLAY_NAME));
                String folder = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Images.Media.BUCKET_DISPLAY_NAME));
                String datapath = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA));

                //String folderpaths =  datapath.replace(name,"");
                String folderpaths = datapath.substring(0, datapath.lastIndexOf(folder+"/"));
                folderpaths = folderpaths+folder+"/";
                if (!picPaths.contains(folderpaths)) {
                    picPaths.add(folderpaths);

                    folds.setPath(folderpaths);
                    folds.setFolderName(folder);
                    folds.setFirstPic(datapath);//if the folder has only one picture this line helps to set it as first so as to avoid blank image in itemview
                    folds.addpics();
                    picFolders.add(folds);
                }else{
                    for(int i = 0;i<picFolders.size();i++){
                        if(picFolders.get(i).getPath().equals(folderpaths)){
                            picFolders.get(i).setFirstPic(datapath);
                            picFolders.get(i).addpics();
                        }
                    }
                }
            }while(cursor.moveToNext());
            cursor.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
        for(int i = 0;i < picFolders.size();i++){
            Log.d("picture folders",picFolders.get(i).getFolderName()+" and path = "+picFolders.get(i).getPath()+" "+picFolders.get(i).getNumberOfPics());
        }

        //reverse order ArrayList
       /* ArrayList<imageFolder> reverseFolders = new ArrayList<>();
        for(int i = picFolders.size()-1;i > reverseFolders.size()-1;i--){
            reverseFolders.add(picFolders.get(i));
        }*/

        return picFolders;
    }

This code gets all image folders?
source:

Android-Simple-Image-Gallery/app/src/main/java/com/androidcodeman/simpleimagegallery/MainActivity.java at master · CodeBoy722/Android-Simple-Image-Gallery

A simple implementation of an image gallery app in android - CodeBoy722/Android-Simple-Image-Gallery

github.com

 

[JohnC]

Maybe running this routine after you change a file or folder will do the trick:

Force media scanner on deleted file

I am writing an app that deletes an image from the Camera directory. That works fine, and my app can re-list the files and the file is no longer present. BUT the problem is that the device default gallery/album still shows the image thumbnail and the image when you click on it. Once the...

www.b4x.com

 

[Erel]

You can convert this code to B4A with ContentResolver library and some work to find all the constants.
Or run it with inline Java. See whether it actually returns what you need.