<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
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    xmlns:tools="http://schemas.android.com/tools" 
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    android:layout_width="match_parent" 
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    android:layout_height="match_parent" 
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    android:paddingBottom="@dimen/activity_vertical_margin" 
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    android:paddingLeft="@dimen/activity_horizontal_margin" 
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    android:paddingRight="@dimen/activity_horizontal_margin" 
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    android:paddingTop="@dimen/activity_vertical_margin" 
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    > 
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    <LinearLayout 
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        android:layout_width="match_parent" 
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        android:layout_height="match_parent" > 
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        <Button 
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            android:id="@+id/btn_toPay_oneyuan" 
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            style="?android:attr/buttonStyleSmall" 
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            android:layout_width="wrap_content" 
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            android:layout_height="wrap_content" 
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            android:layout_toLeftOf="@id/logout" 
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            android:text="充值1元" /> 
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        <Button 
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            android:id="@+id/btn_toPay_twoyuan" 
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            style="?android:attr/buttonStyleSmall" 
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            android:layout_width="wrap_content" 
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            android:layout_height="wrap_content" 
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            android:layout_toLeftOf="@id/logout" 
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            android:text="充值2元" /> 
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    </LinearLayout> 
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</RelativeLayout> 
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