Android. Layout background stretches

 如果用 ScrollView在最外層 會導致背景拉長 解決辦法
http://stackoverflow.com/questions/11448416/android-layout-background-stretches

<?xml version="1.0" encoding="utf-8"?>



    <bitmap xmlns:android="http://schemas.android.com/apk/res/android"
        android:src="@drawable/m_bg"


   android:gravity="center" />


//don't use this if you want scrollView`
//        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
        se