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  • first 作业

     <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"
        android:paddingBottom="@dimen/activity_vertical_margin"
        android:paddingLeft="@dimen/activity_horizontal_margin"
        android:paddingRight="@dimen/activity_horizontal_margin"
        android:paddingTop="@dimen/activity_vertical_margin"
        tools:context="com.example.dinghaiyang.MainActivity" >
        

        <Button
           android:id="@+id/but_one"
            android:layout_width="80dp"
            android:layout_height="80dp"
            android:layout_centerInParent="true"
            android:background="#000000"
           />

         <Button
            android:id="@+id/but_two"
            android:layout_width="80dp"
            android:layout_height="80dp"
            android:layout_alignBaseline="@+id/but_four"
            android:layout_alignBottom="@+id/but_four"
            android:layout_alignLeft="@+id/but_one"
            android:background="#FFF0F5" />
        <Button
            android:id="@+id/but_three"
            android:layout_width="80dp"
            android:layout_height="80dp"
            android:layout_alignBaseline="@+id/but_two"
            android:layout_alignBottom="@+id/but_two"
            android:layout_toLeftOf="@+id/but_two"
            android:background="#FFFFFF" />

        <Button
            android:id="@+id/but_four"
            android:layout_width="80dp"
            android:layout_height="80dp"
            android:layout_above="@+id/but_one"
            android:layout_toRightOf="@+id/but_one"
            android:background="#FFFF00" />

        <Button
            android:id="@+id/but_five"
            android:layout_width="80dp"
            android:layout_height="80dp"
            android:layout_alignLeft="@+id/but_four"
            android:layout_centerVertical="true"
            android:background="#483D8B" />

        <Button
            android:id="@+id/but_six"
            android:layout_width="80dp"
            android:layout_height="80dp"
            android:layout_below="@+id/but_one"
            android:layout_toRightOf="@+id/but_one"
            android:background="#008000" />

        <Button
            android:id="@+id/but_seven"
            android:layout_width="80dp"
            android:layout_height="80dp"
            android:layout_alignBaseline="@+id/but_six"
            android:layout_alignBottom="@+id/but_six"
            android:layout_toLeftOf="@+id/but_six"
            android:background="#87CEEB" />

        <Button
            android:id="@+id/but_eight"
            android:layout_width="80dp"
            android:layout_height="80dp"
            android:layout_alignLeft="@+id/but_three"
            android:layout_below="@+id/but_one"
            android:background="#FF0000" />

        <Button
            android:id="@+id/but_nine"
            android:layout_width="80dp"
            android:layout_height="80dp"
            android:layout_above="@+id/but_eight"
            android:layout_alignLeft="@+id/but_eight"
            android:background="#00FF7F" />

       
        

    </RelativeLayout> 
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  • 原文地址:https://www.cnblogs.com/DOCEAN/p/11451483.html
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