android - View Gravity not working -


im overlaying linearlayout.the layout contains button.the button should top right of linearlayout.but gravity doesnt seem work.

code: inside oncreate method of service.

   final windowmanager.layoutparams params3 = new windowmanager.layoutparams(            windowmanager.layoutparams.type_system_alert,            windowmanager.layoutparams.flag_not_touch_modal  |   windowmanager.layoutparams.flag_watch_outside_touch |              windowmanager.layoutparams.flag_not_focusable,             pixelformat.translucent);     linearlayout ll=new linearlayout(this);    linearlayout ll2=new linearlayout(this);    linearlayout.layoutparams lp=new linearlayout.layoutparams(linearlayout.layoutparams.wrap_content,linearlayout.layoutparams.wrap_content);    lp.gravity=gravity.right;    lp.width=30;    lp.height=30;     b=new button(this);    b.setbackgroundresource(r.drawable.x);    params3.gravity=gravity.top;    params3.height=200;    params3.width=200;     ll.addview(b, lp);    wm.addview(ll, params3);

the linearlayout 200x200 created , on top.but button isnt top right.i tried using b.setwidth , b.setheight. not help.

linearlayout default horizontal can't align horizontally in horizontal linearlayout (e.g right, center_horizontal, left) , can't align vertically in vertical linearlayout (e.g top center_vertical, bottom) in vertical linearlayout.

if need align right must either set linearlayout vertical or use different viewgroup, example framelayout. 

linearlayout ll = new linearlayout(this); ll.setorientation(linarlayout.vertical);

ant buttom on top since it's first item. , why not doing in xml? easier when less code.

edit: put button top right of videoview layout this.

<?xml version="1.0" encoding="utf-8"?> <relativelayout xmlns:android="http://schemas.android.com/apk/res/android"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:orientation="vertical" >      <videoview         android:id="@+id/videoview1"         android:layout_width="200dp"         android:layout_height="200dp" />      <button         android:id="@+id/button1"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:layout_margintop="10dp"         android:layout_marginright="10dp"         android:layout_aligntop="@+id/videoview1"         android:layout_alignright="@+id/videoview1"         android:text="button" />  </relativelayout>

put layout in layout res folder of project. project/res/layout/your_layout.xml

to attach layout activity's window:

public final class youractivity         extends activity {     @override     protected void oncreate(bundle savedinstancestate)     {         super.oncreate(savedinstancestate);         setcontentview(r.layout.your_layout);          // videoview         videoview vv = (videoview) findviewbyid(r.id.videoview1);          //get button reference         view button = findviewbyid(r.id.button1);     } }

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