Scaling drawables not to density (dip), but actual pixel resolution (px)

Question

I've been working on an app where it is important that drawables are always the same size relative to the display's width, e.g. always 1/8 of the screen height in pixels. I understand how density independent pixels work, but as their goal is to always represent the same physical size, it is pretty much the opposite of what i need. How can I achive this? I have tried using a .png-file with a very high resolution and downscale accordingly, but its always blurry and the quality loss is unbelievable. Thank you for your help, best regards.

Answer 1

Had the exact same issue. Here's my solution:

DisplayMetrics displayMetrics = getApplicationContext().getResources().getDisplayMetrics();
Double newHeight = 0.125 * displayMetrics.heightPixels;
yourImageView.getLayoutParams().height = newHeight.intValue();

Alternatively, use a LinearLayout. Set your ImageView's weight to 1, and the LinearLayout's weightSum to 8.