垂直拆分Android布局，在两侧将重力添加到中心对象

Question

I have an android layout I'd like to split down the middle vertically and then add gravity so I can center items within the left and the right halves of the layout.

Can someone explain or post an example of how this might be accomplished?

Thus far I've created a layout and a horizontal layout. My problem is the horizontal layout needs balance so I'd like to figure out a way to change my current layout (show below) to include a way of centering the objects within the left and right halves of the screen.

SOURCE:

<?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:background="@drawable/background"
    android:orientation="vertical" >

     <ImageView
         android:id="@+id/emblem"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_alignParentLeft="true"
         android:layout_alignParentTop="true"
         android:layout_marginTop="24dp"
         android:gravity="center"
         android:scaleType="fitStart"
         android:src="@drawable/apn_app_logo" />

     <Button
         android:id="@+id/go_button"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_alignBottom="@+id/emblem"
         android:layout_alignParentRight="true"
         android:layout_marginBottom="23dp"
         android:layout_marginRight="22dp"
         android:background="@drawable/apn_app_go_button" />

     <TextView
         android:id="@+id/text"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_alignParentRight="true"
         android:layout_below="@+id/go_button"
         android:gravity="center"
         android:text="@string/start_text2"
         android:textColor="#000000"
         android:textSize="18sp" />

</RelativeLayout>

Answer 1

First of all android:orientation attribute will not work in Relative Layout .If you want to split the screen half into two equal layout your parent layout will be a linear layout with android:orientation= horizontal . Then inside that have 2 LinearLayout with each android:orientation= vertical . Inside 1st Linear layout you can have the ImageView , Button and TextView with each of their layout_gravity=center .

Hope this helps. If you want to do something in the 2nd half of teh screen , do all teh stuffs in the 2nd LinearLayout. Happy Coding.

Answer 2

Here's some code which should be self-explanotory:

    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal"
    tools:context=".MainActivity" >

    <LinearLayout
        android:layout_width="0dp"
        android:layout_height="match_parent"
        android:layout_weight="1"
        android:orientation="horizontal"
        android:background="#00dd00"
        android:gravity="center"
     >

      <Button 
          android:text="Button"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          />

    </LinearLayout>

    <LinearLayout
        android:layout_width="0dp"
        android:layout_height="match_parent"
        android:layout_weight="1"
        android:orientation="horizontal"
        android:background="#dd0000"
        android:gravity="center_horizontal"
    >

        <Button 
          android:text="Button"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          />


    </LinearLayout>

</LinearLayout>

and here's what you'll achieve: