Get the length and width of the screen in Android

Android to get the length and width of the screen, referring to the internet there are a lot of code, but the results are not practical, such as my phone is i9000, screen size is 480*800px, the result is 320*533

The result is very unreliable, so I wrote a few lines of code, a close test

Test parameters:

Test environment: i9000 (Samsung)

Physical screen: 480*800px

density:1.5

Test code:

//Get screen density (method 1) int screenwidth = Getwindowmanager (). Getdefaultdisplay (). GetWidth ();      Screen width (pixels, such as: 480px) int screenheight = Getwindowmanager (). Getdefaultdisplay (). GetHeight (); High screen (pixel, such as: 800p) log.e (TAG + "Getdefaultdisplay", "screenwidth=" + ScreenWidth +;


screenheight= "+ screenheight);
Get screen density (method 2) displaymetrics DM = new Displaymetrics ();

DM = Getresources (). Getdisplaymetrics ();        float density = dm.density;     Screen density (pixel scale: 0.75/1.0/1.5/2.0) int densitydpi = dm.densitydpi;
Screen density (pixels per inch: 120/160/240/320) Float xdpi = dm.xdpi;

float ydpi = dm.ydpi; LOG.E (TAG + "Displaymetrics", "xdpi=" + xdpi + ";
Ydpi= "+ ydpi); LOG.E (TAG + "Displaymetrics", "density=" + density + ";

Densitydpi= "+ densitydpi);      ScreenWidth = Dm.widthpixels;     Screen width (pixels, such as: 480px) screenheight = Dm.heightpixels; High screen (pixel, such as: 800px) log.e (TAG + "Displaymetrics", "screenwidth=" + ScreenWidth + ";



screenheight= "+ screenheight); Get screen density (method 3) DM = new DisplaYmetrics ();

Getwindowmanager (). Getdefaultdisplay (). Getmetrics (DM);      density = dm.density;     Screen density (pixel scale: 0.75/1.0/1.5/2.0) densitydpi = dm.densitydpi;
Screen density (pixels per inch: 120/160/240/320) xdpi = dm.xdpi;

ydpi = dm.ydpi; LOG.E (TAG + "Displaymetrics", "xdpi=" + xdpi + ";
Ydpi= "+ ydpi); LOG.E (TAG + "Displaymetrics", "density=" + density + ";

Densitydpi= "+ densitydpi);        int screenwidthdip = Dm.widthpixels;      Screen width (dip, such as: 320dip) int screenheightdip = Dm.heightpixels; Screen width (dip, such as: 533dip) log.e (TAG + "displaymetrics (222)", "screenwidthdip=" + Screenwidthdip + "; 

screenheightdip= "+ Screenheightdip);      ScreenWidth = (int) (Dm.widthpixels * density + 0.5f);     Screen width (px, such as: 480px) screenheight = (int) (Dm.heightpixels * density + 0.5f); High screen (PX, such as: 800px) log.e (TAG + "displaymetrics (222)", "screenwidth=" + ScreenWidth + "; screenheight= "+ screenheight);