Java tutorial
//package com.java2s; import android.app.Activity; import android.view.View; import android.view.ViewGroup; import android.widget.FrameLayout; public class Main { public static void addViewToRoot(Activity act, View v) { ViewGroup root = (FrameLayout) act.findViewById(android.R.id.content); root = (ViewGroup) root.getChildAt(0); ViewGroup.LayoutParams params = new FrameLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT); root.addView(v, params); } }