Android简单布局-------相对布局

<RelativeLayout 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"

tools:context=".MainActivity" >

<ImageButton

android:id="@+id/img1"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_centerInParent="true"

android:src="@drawable/hb" />

<ImageButton

android:id="@+id/img2"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_above="@id/img1"

android:layout_toLeftOf="@id/img1"

android:src="@drawable/cm" />

<ImageButton

android:id="@+id/img3"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_above="@id/img1"

android:layout_toRightOf="@id/img1"

android:src="@drawable/fq" />

<ImageButton

android:id="@+id/img4"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_below="@id/img1"

android:layout_toLeftOf="@id/img1"

android:src="@drawable/qj" />

<ImageButton

android:id="@+id/img5"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_below="@id/img1"

android:layout_toRightOf="@id/img1"

android:src="@drawable/xj" />

</RelativeLayout>