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javaandroidscreenscreen-size

Android DisplayMetrics returns incorrect screen size in pixels

I have a Samsung Galaxy S20+.

I run this code:

DisplayMetrics displayMetrics = new DisplayMetrics();
    getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);
    mScreenHeight = displayMetrics.heightPixels;
    mScreenWidth = displayMetrics.widthPixels;

I get:

mScreenHeight = 2201.0 mScreenWidth = 1080.0

Whereas the S20+ screen resolution is 1440x3200 according to this page.

Such a big gap is not just a question of status bar height.

How can I get the real screen size in pixels ?

Thanks !

Solution

  • Recent Galaxy S devices have a setting to change the screen resolution. On the S20+ there are 3 options:

    • WQHD+: 3200x1440
    • FHD+: 2400x1080
    • HD+: 1600x720

    You're likely in the FHD+ mode. Even though the device has a real pixel dimension of 3200x1440, your usable software window is downscaled and this is what the DisplayMetrics object is giving you.