[SOLVED] Change Device Wallpaper in Python/Kivy

Change Device Wallpaper in Python/Kivy

I have a simple app and,among other things, I need this app to be able to change the wallpaper of a device on Android.

Now, I've looked around on the net and pyjnius seems like the obvious choice. The problem now is I don't know the first thing about java but a quick google search produces the WallpaperManager as something I could use.

Here's the question: How do I implement that wallpaper manager functionality on my kivy app with pyjnius. Again, NOT a java dev so don't shoot

Solution

I don't know Java either but after examining some java examples i generated a solution. Don't forget to add SET_WALLPAPER permission to your buildozer.spec file. You also need to get storage permission to have this example work.

from jnius import autoclass, cast

PythonActivity = autoclass('org.kivy.android.PythonActivity')

try:
    Environment = autoclass("android.os.Environment")
    path = Environment.getExternalStorageDirectory().toString()
    
    currentActivity = cast('android.app.Activity', PythonActivity.mActivity)
    context = cast('android.content.Context', currentActivity.getApplicationContext())
    
    File = autoclass('java.io.File')
    file = File(path+"/test.jpg")
    
    BitmapFactory = autoclass('android.graphics.BitmapFactory')
    bitmap = BitmapFactory.decodeFile(file.getAbsolutePath())
    
    WallpaperManager = autoclass('android.app.WallpaperManager')
    manager = WallpaperManager.getInstance(context)
    manager.setBitmap(bitmap)
          
except Exception as e:
    print(e)