Android gets screen width and height

1.

WindowManager wm = (WindowManager) getcontext ()                    . Getsystemservice (Context.window_service);       int width = wm.getdefaultdisplay (). getwidth ();      int height = wm.getdefaultdisplay (). GetHeight ();

2.

 This . Getwindowmanager ();       int width = wm.getdefaultdisplay (). getwidth ();      int height = wm.getdefaultdisplay (). GetHeight ();

3. In an activity's OnCreate method, write the following code:

New displaymetrics ();        Getwindowmanager (). Getdefaultdisplay (). Getmetrics (metric);         int width = metric.widthpixels;     // screen width (pixels)        int height = metric.heightpixels;   // screen height (pixels)        float density = metric.density;      // screen Density (0.75/1.0/1.5)        int densitydpi = metric.densitydpi;  // screen density dpi (120/160/240)

However, it should be noted that on a low-density small-screen mobile phone, only the above code is not able to get the correct size. For example, a 240x320 pixel low-density mobile phone, if you run the above code, the screen size obtained is 320x427. As a result, the study found that without multi-resolution support, the Android system would convert the 240x320 low-density (120) size to a medium-density (160) dimension, which would greatly affect the coding of the program. Therefore, it is necessary to add the Supports-screens node in the project's Androidmanifest.xml file, the specific content is as follows:

<supports-Screens            Android:smallscreens= "true"            android:normalscreens= "true"             Android:largescreens= "true"            android:resizeable= "true"            android:anydensity= " True "/>

In this case, the current Android program supports a variety of resolutions, so you can get the correct physical size.

Android gets screen width and height