Wallpaper not properly fit on device screen

Question

I have one set of images in one drawable folder. I have one button to set image as wallpaper on device screen. But when I set this image as wallpaper its either zoom or crop

Answer 1

try this code

Bitmap bmap2 =BitmapFactory.decodeStream(getResources().openRawResource(mThumb[position]));
    DisplayMetrics metrics = new DisplayMetrics(); 
    getWindowManager().getDefaultDisplay().getMetrics(metrics);
    int height = metrics.heightPixels; 
    int width = metrics.widthPixels;
    Bitmap bitmap = Bitmap.createScaledBitmap(bmap2, width, height, true); 
    WallpaperManager wallpaperManager = WallpaperManager.getInstance(this); 
    wallpaperManager.setWallpaperOffsetSteps(1, 1);
    wallpaperManager.suggestDesiredDimensions(width, height);
    try {
      wallpaperManager.setBitmap(bitmap);
      } catch (IOException e) {
      e.printStackTrace();
    }