How do I add a border to my entire android app programmatically? -

i trying add 10 pixel border sides of app, breaks every time try add margin/padding. can give me clue need doing make happen? i've included code below. first post if have done wrong apologize in advance.

import android.app.activity; import android.content.context; import android.os.bundle; import android.view.motionevent; import android.view.keyevent; import android.view.window; import android.view.windowmanager; import android.view.view; import android.view.viewgroup; import android.widget.textview; import android.widget.edittext; import android.text.editable; import android.widget.button; import android.widget.imageview; import android.widget.linearlayout; import android.widget.framelayout; import android.graphics.drawable.drawable; import android.content.res.configuration; import android.app.notification; import android.app.notificationmanager; import android.app.pendingintent; import android.content.intent; import android.view.view.onkeylistener; import android.view.menuitem; import android.view.menu; import android.view.gravity; import android.text.method.textkeylistener; import java.util.linkedlist; import java.io.sequenceinputstream; import java.io.bufferedinputstream; import java.io.ioexception; import java.io.inputstream; import java.io.outputstream; import java.io.fileoutputstream; import java.io.file; import java.io.fileinputstream; import java.util.zip.*; import java.util.zip.zipentry; import java.util.zip.zipinputstream; import java.util.set; import android.text.spannedstring; import java.io.bufferedreader; import java.io.bufferedinputstream; import java.io.inputstreamreader; import android.view.inputmethod.inputmethodmanager; import android.content.pm.packageinfo; import android.content.pm.packagemanager; import android.os.handler; import android.os.message; import java.util.concurrent.semaphore; import android.content.pm.activityinfo; import android.view.display; import android.text.inputtype; import android.util.log;  public class mainactivity extends activity {     @override     protected void oncreate(bundle savedinstancestate)     {         super.oncreate(savedinstancestate);          setrequestedorientation(globals.horizontalorientation ? activityinfo.screen_orientation_landscape : activityinfo.screen_orientation_portrait);          instance = this;         // fullscreen mode         requestwindowfeature(window.feature_no_title);         getwindow().setflags(windowmanager.layoutparams.flag_fullscreen,                 windowmanager.layoutparams.flag_fullscreen);         if(globals.inhibitsuspend)             getwindow().setflags(windowmanager.layoutparams.flag_keep_screen_on,                     windowmanager.layoutparams.flag_keep_screen_on);          log.i("sdl", "libsdl: creating startup screen");         _layout = new linearlayout(this);         _layout.setorientation(linearlayout.vertical);         _layout.setlayoutparams(new linearlayout.layoutparams(viewgroup.layoutparams.fill_parent, viewgroup.layoutparams.fill_parent));         _layout2 = new linearlayout(this);         _layout2.setlayoutparams(new linearlayout.layoutparams(viewgroup.layoutparams.fill_parent, viewgroup.layoutparams.wrap_content));          final semaphore loadedlibraries = new semaphore(0); 

farther down...

setcontentview(_videolayout);          class callback implements runnable         {             mainactivity p;             callback( mainactivity _p ) { p = _p; }             public void run()             {                 try {                     thread.sleep(200);                 } catch( interruptedexception e ) {};                  if(p.maudiothread == null)                 {                     log.i("sdl", "libsdl: loading libraries");                     p.loadlibraries();                     p.maudiothread = new audiothread(p);                     log.i("sdl", "libsdl: loading settings");                     final semaphore loaded = new semaphore(0);                     class callback2 implements runnable                     {                         public mainactivity parent;                         public void run()                         {                             settings.load(parent);                             loaded.release();                             loadedlibraries.release();                         }                     }                     callback2 cb = new callback2();                     cb.parent = p;                     p.runonuithread(cb);                     loaded.acquireuninterruptibly();                     if(!globals.compatibilityhacksstaticinit)                         p.loadapplicationlibrary(p);                 } 

main.xml

<?xml version="1.0" encoding="utf-8"?> <linearlayout xmlns:android="http://schemas.android.com/apk/res/android"     android:orientation="vertical"     android:layout_width="fill_parent"     android:layout_height="fill_parent"     > </linearlayout>