Get All Installed Application icons in Android : java.lang.ClassCastException

狂风中的少年 提交于 2019-11-29 03:50:52

Your Problem is that your Icon is no instance of BitmapDrawable, one can check like that:

Bitmap APKicon;
if(icon instanceof BitmapDrawable) {
  APKicon  = ((BitmapDrawable)icon).getBitmap();
}

in this case your solution would be right, one can just cast it, but if not (and that is your case) one needs to do something like that:

else{
     Bitmap bitmap = Bitmap.createBitmap(icon.getIntrinsicWidth(),icon.getIntrinsicHeight(), Config.ARGB_8888);
     Canvas canvas = new Canvas(bitmap); 
     icon.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
     icon.draw(canvas);
     APKicon = bitmap;
}

this solution will work in any case

public Bitmap getAppIcon(String path) {
    PackageInfo pi = pm.getPackageArchiveInfo(path, 0);
    Drawable icon = pi.applicationInfo.loadIcon(pm);
    Bitmap APKicon = ((NinePatchDrawable) icon).getBitmap();
    return APKicon;
}

You have to cast the icon into NinePatchDrawable (line 4).

Caused by: java.lang.ClassCastException: android.graphics.drawable.NinePatchDrawable cannot be cast to android.graphics.drawable.BitmapDrawable

Problem :

You are trying to typecast BitmapDrawable to NinePatchDrawable

Solution:

Try this:

public Bitmap getAppIcon(String path) {
        PackageInfo pi = pm.getPackageArchiveInfo(path, 0);
        pi.applicationInfo.sourceDir = path;
        pi.applicationInfo.publicSourceDir = path;
        Drawable icon = pi.applicationInfo.loadIcon(pm);
        Bitmap APKicon = ((NinePatchDrawable) icon).getBitmap();  // cast to NinePatchDrawable
        return APKicon;
    }

PackageManager.GetApplicationInfo returns a Drawable object. It might not be a BitmapDrawable.

You can test whether it is a BitmapDrawable with:

If pm.GetApplicationIcon(packname) Is BitmapDrawable Then ...

If you want to convert a non-BitmapDrawable to a BitmapDrawable then you need to:

  • Create a mutable bitmap.
  • Draw the drawable with Canvas.DrawDrawable
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