HEGII.ss.mes.pda/res/layout/exit_layout.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center_vertical|center_horizontal"
    android:orientation="vertical" >
       
        
        <TextView
            android:id="@+id/titleTv"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:text="确定退出程序？"
            android:layout_marginBottom="7dp"
            android:gravity="center"
            android:textSize="@dimen/textsize_20"
            android:textColor="#2E2E2E"
            />
        
        
        <LinearLayout 
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:orientation="horizontal" >
            
            <Button
                android:id="@+id/btOK"
                android:layout_width="100dip"
                android:layout_height="40dip"
                android:text="确定"
                android:layout_gravity="center"
                android:textSize="@dimen/textsize_20"
                android:textColor="@color/white"
                android:background="@drawable/exitbtn_selector"
                />
            
            <Button
                android:id="@+id/btCancel"
                android:layout_width="100dip"
                android:layout_height="40dip"
                android:layout_gravity="center"
                android:text="取消"
                android:layout_marginLeft="10dp"
                android:textSize="@dimen/textsize_20"
                android:textColor="@color/white"
                android:background="@drawable/exitbtn_selector"
                />
            
	</LinearLayout>     

</LinearLayout>