Retrieving xhdpi app icons from packageManager?

Question

I have an activity in my app wherein a ListView of all installed apps is generated. In addition to the app name, the app icon appears as well. I had created an array of obje

Answer 1

Here's a new answer to an old question, just to put everything in one place. You'll need to get the devices default density, and resize the image to ensure that you have a properly conforming size, as just requesting the icon does not always return proper size.

Consider these two methods, one to obtain device size, and the second to resize your drawable:

private int getDeviceDpi(){
        DisplayMetrics dm = new DisplayMetrics();
        getWindowManager().getDefaultDisplay().getMetrics(dm);
        return dm.densityDpi;
}

private Drawable getSizedAppIcon(Context context, String packageName, int Density) throws PackageManager.NameNotFoundException {
    //for @param Density you can use a static from DisplayMetrics.

        PackageManager pm = Objects.requireNonNull(context).getPackageManager();
        ApplicationInfo appInfo = this.getPackageManager().getApplicationInfo(packageName, 0);
        Drawable icon = pm.getApplicationIcon(appInfo);
        Bitmap bitmap = ((BitmapDrawable) icon).getBitmap();
        switch (Density){
            case DisplayMetrics.DENSITY_LOW: //120
                return new BitmapDrawable(getResources(), Bitmap.createScaledBitmap(bitmap,
                        32, 32, true));
            case DisplayMetrics.DENSITY_MEDIUM: //160
                return new BitmapDrawable(getResources(), Bitmap.createScaledBitmap(bitmap,
                        48, 48, true));
            case DisplayMetrics.DENSITY_HIGH: //240
                return new BitmapDrawable(getResources(), Bitmap.createScaledBitmap(bitmap,
                        72, 72, true));
            case DisplayMetrics.DENSITY_XHIGH: //320
                return new BitmapDrawable(getResources(), Bitmap.createScaledBitmap(bitmap,
                        96, 96, true));
            case DisplayMetrics.DENSITY_XXHIGH: //480
                return new BitmapDrawable(getResources(), Bitmap.createScaledBitmap(bitmap,
                        144, 144, true));
            case DisplayMetrics.DENSITY_XXXHIGH: //640
                return new BitmapDrawable(getResources(), Bitmap.createScaledBitmap(bitmap,
                        192, 192, true));
            default:
                return icon;
        }

}

Then call them like in this example:

try{
    getSizedAppIcon(this, "com.example.app",getDeviceDpi());
}catch (Exception ignore) {}