Android automatically adjusts font size based on screen resolution

1. Get phone screen width and height in oncreate

1 New displaymetrics (); 2 Getwindowmanager (). Getdefaultdisplay (). Getmetrics (DM); // Get Window Properties 3 int screenwidth = dm.widthpixels; // width of window 4 int screenheight = dm.heightpixels; // Window Height

2. Get the layout of activity after OnCreate

1 viewgroup viewgroup= (viewgroup)this. Findviewbyid (Android. r.id.content); 2 changeview.changeviewsize (ViewGroup, ScreenWidth, screenheight);

3, ChangeView code as follows

1  Public classChangeView {2     //Traverse Set Font3      Public Static voidChangeviewsize (ViewGroup ViewGroup,intScreenWidth,4             intScreenHeight) {//incoming activity top layout, screen width, screen height5         intAdjustfontsize =adjustfontsize (ScreenWidth, screenheight);6          for(inti = 0; I < Viewgroup.getchildcount (); i++) {7View v =Viewgroup.getchildat (i);8             if(VinstanceofViewGroup) {9 changeviewsize ((viewgroup) v, ScreenWidth, screenheight);Ten}Else if(VinstanceofButton) {//button to enlarge this must be placed on the TextView, because the button also inherits the TextView One(Button) v). Settextsize (Adjustfontsize + 2); A}Else if(VinstanceofTextView) { - ( (TextView) v). Settextsize (adjustfontsize); -                 /* the * if (v.getid () = = r.id.title_msg) {//Top header ((TextView) v - *). Settextsize (adjustfontsize+4); }else{((TextView) v - *). Settextsize (Adjustfontsize); } -                  */ +             } -         } +     } A  at     //Get font size -      Public Static intAdjustfontsize (intScreenWidth,intscreenheight) { -ScreenWidth = ScreenWidth < screenheight?Screenwidth:screenheight; -         /** - * 1. Get the view width in the onsizechanged of the view, normally the default width is 320, so calculate a zoom rate = (float) - * w/320 W is the actual width 2. Then paint.settextsize ((int) (8*rate) when setting the font size; in * 8 is the font size to be set at a resolution width of 320 actual font size = default font size x rate -          */ to         intRate = (int) (5 * (float) screenwidth/320);//I myself test this multiples more suitable, of course you can test and then modify +         returnRate < 15? 15:rate;//the font is too small to look good. -     } the } * //method is transferred from http://hy0664.iteye.com/blog/1360051

4. If you are developing an application that wants to browse on a tablet, add the manifest node in the Androidmanifest.xml file (DTD recommendations on the application node):

1 < Supports-screens 2         android:anydensity = "true" 3         android:largescreens= "true"4        android:normalscreens= " True "5        android:smallscreens=" true "6        android: resizeable= "true"/>

Android automatically adjusts font size based on screen resolution