Android Gets the width and height of the control in OnCreate

A demo, in an XML layout, a row is half the height of another row. Before using Layout_weight, the results are also not ideal.

<?xml version= "1.0" encoding= "UTF-8"?> <linearlayout xmlns:android= "http://schemas.android.com/apk/res/ Android "Android:layout_width=" Match_parent "android:layout_height=" match_parent "android:orientation=" ver Tical "> <linearlayout android:layout_width=" match_parent "android:layout_height=" Wrap_cont Ent "android:background=" #ff0000 "android:layout_weight=" 2 "> <textview Androi D:layout_width= "Wrap_content" android:layout_height= "Wrap_content" android:text= "1" android:textcolor = "@android: Color/white"/> </LinearLayout> <linearlayout android:layout_width= "Match_ Parent "android:layout_height=" wrap_content "android:background=" #cccccc "android:layout_weight=" 2 "&G        T <textview android:layout_width= "wrap_content" android:layout_height= "Wrap_content" android:text= "2 "Android:textcoLor= "@android: Color/black"/> </LinearLayout> <linearlayout android:layout_width= "Match_pare        NT "android:layout_height=" Wrap_content "android:background=" #ddaacc "android:layout_weight=" 1 "> <textview android:layout_width= "wrap_content" android:layout_height= "Wrap_content" android:t         ext= "3" android:textcolor= "@android: Color/black"/> </LinearLayout> <linearlayout Android:layout_width= "Match_parent" android:layout_height= "wrap_content" android:background= "#000" Android oid:layout_weight= "1" > <textview android:layout_width= "wrap_content" Android:layout_ height= "Wrap_content" android:text= "4" android:textcolor= "@android: Color/white"/> </line  Arlayout> </LinearLayout>

It works, but if there's too much content, the layout doesn't work. So we set its height dynamically based on the size of the phone screen.

<pre name= "code" class= "Java" >public class Homeactivity extends Activity{private linearlayout homelayout;// Parent private LinearLayout home1;private linearlayout home2;private linearlayout home3;private LinearLayout Home4;boolean Hasmeasured = false; @Overrideprotected void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate); Setcontentview (r.layout.activity_home); home1 = (linearlayout) Findviewbyid (r.id.home_content_section1); home2 = ( LinearLayout) Findviewbyid (r.id.home_content_section2); Home3 = (linearlayout) Findviewbyid (r.id.home_content_ SECTION3); home4 = (linearlayout) Findviewbyid (r.id.home_content_section4); homelayout = (linearlayout) Findviewbyid ( R.id.home_content); Viewtreeobserver vto = Homelayout.getviewtreeobserver (); Vto.addonpredrawlistener (new Viewtreeobserver.onpredrawlistener () {@Overridepublic Boolean onpredraw () {if (hasmeasured = = False) {//Get H                Width and height of omelayout int height = homelayout.getmeasuredheight (); Int width = Homelayout.getmeasuredwidth ();                Android.view.ViewGroup.LayoutParams LP1 =home1.getlayoutparams ();                LP1.HEIGHT=HEIGHT*2/7;                Android.view.ViewGroup.LayoutParams LP2 =home2.getlayoutparams ();                LP2.HEIGHT=HEIGHT*2/7;                Android.view.ViewGroup.LayoutParams lp3 =home3.getlayoutparams ();                LP3.HEIGHT=HEIGHT*1/7;                Android.view.ViewGroup.LayoutParams LP4 =home4.getlayoutparams ();                LP4.HEIGHT=HEIGHT*2/7;                Hasmeasured = true; }return true;}});}

Android Gets the width and height of the control in OnCreate