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How to get screen width in inches in ANDROID?

How to get screen width ??

DisplayMetrics metrics = getResources().getDisplayMetrics(); int f = metrics.densityDpi; // getWindowManager().getDefaultDisplay().getMetrics(metrics); int width = metrics.widthPixels; int dp = (int)(width / (metrics.density));

I do this, so let's assume that my density is 120..and the pixel width is 240 .. through the calculation, I get 240 / 0.75 .... so do I have 320 widthdpi?

However, this is not the case .... the widthdpi is less than 320, I think ... because 320 goes wrong with me on the screen .... using 120 works.

on Nexus 4 ... with a width of 768 and a density of dpi 320 ... I divide 768/2 and get 384 of the correct density dpi (works)

But on others, such as 240, 160, 120 dpi ... calculating the dpi width seems wrong ...

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1 answer

The multi-screen support defines the definition of DP

 px = dp * (dpi / 160)

therefore

 dp = px / (dpi / 160)

or equivalent

 dp = px * 160 / dpi

Remember that dp means “density independent pixel,” that is, 1dp is the same physical size on the ldpi device as on the xxhdpi device. Therefore, you should expect that all phones will have approximately ~ 300-400dp width, noting the dimensions of the dp bucket:

  • xlarge screens at least 960dp x 720dp
  • large screens of at least 640dp x 480dp
  • regular screens at least 470dp x 320dp
  • small screens at least 426dp x 320dp
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