Image Setting Dynamically

private int imageHeight, imageWidth, w;
private ImageView imageSingleFoodItem;
 
onCreate() {

  // w = (int) (getScreenWidth(this) * 0.80);
        w = (int) (getScreenWidth(this));
        
         //drawable image and you want that size you can get like this way
        BitmapFactory.Options options = new BitmapFactory.Options();
        options.inJustDecodeBounds = true;
        BitmapFactory.decodeResource(getResources(), R.drawable.food3, options);
        imageHeight = options.outHeight;
        imageWidth = options.outWidth;

        imageSingleFoodItem.getLayoutParams().height = (int) Math.ceil((imageHeight * w) / imageWidth);
        imageSingleFoodItem.getLayoutParams().width = w;
        imageSingleFoodItem.requestLayout();
        imageSingleFoodItem.setImageResource(R.drawable.food3);
}


public static int getScreenWidth(Context context) {
        return context.getResources().getDisplayMetrics().widthPixels;
}