그리드 뷰 명쾌한 해답법 부탁드려요!

Question

Display display = ((WindowManager)getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay();

Point point = new Point();

 

display.getSize(point);

int height = point.y;

int width = point.x;

디바이스의 길이를 3등분으로 나누어 이미지 View의 width와 height로 정하고 싶습니다. 

 

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 
	android:id="@+id/llImageCellBg"
	xmlns:android="http://schemas.android.com/apk/res/android"
	android:layout_width="fill_parent" 
	android:layout_height="fill_parent"
	android:orientation="vertical"
	android:background="@null">           
	<RelativeLayout 
	    android:layout_width="fill_parent" 
	    android:layout_height="fill_parent"
	    android:gravity="center_horizontal"
	    android:orientation="vertical"
	    android:fillViewport="true"
	    android:background="@drawable/no_bg" >
	    
		<ImageView
			android:id="@+id/ivImage"
			android:layout_width="fill_parent"
			android:layout_height="200dp"
			android:scaleType="centerCrop"
			android:src="@null"
			android:layout_alignParentTop="true"
			android:visibility="visible" /> 
			
		<CheckBox
			android:id="@+id/chkImage"
			android:layout_width="wrap_content"
    		android:layout_height="wrap_content"
    		android:layout_alignParentTop="true"
			android:clickable="false"
			android:focusable="false" />
			
	</RelativeLayout>
</LinearLayout> 

 

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 
	xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent"
    android:gravity="center_horizontal"
    android:orientation="vertical"
    android:fillViewport="true"
    android:background="#FFFFFF" >
    
	<LinearLayout 
		android:id="@+id/llTitle"
		android:layout_width="fill_parent"
		android:layout_height="50dp"
		android:orientation="vertical"
		android:gravity="center_vertical"
		android:background="#FEF2EE"
		android:layout_alignParentTop="true">		
	    <TextView 
	        android:layout_width="fill_parent"
	        android:layout_height="wrap_content"
	        android:gravity="center_horizontal|center_vertical"
	        android:textSize="24sp"
	        android:textColor="#000000"
	        android:text="My Gallery"
	        android:typeface="monospace"
	        android:textStyle="bold" />
	</LinearLayout>    

	<LinearLayout  
		android:id="@+id/llImageList"
		android:orientation="vertical"
	  	android:layout_width="fill_parent"
	  	android:layout_height="fill_parent"
	  	android:layout_below="@+id/llTitle"
	  	android:layout_above="@+id/llBottomLayout">
	  	<GridView 
	  		android:id="@+id/gvImageList"
	  		android:layoutAnimation="@anim/layout_wave_scale"
	  		android:layout_width="fill_parent"
	  		android:layout_height="fill_parent"
	  		android:numColumns="3"
	  		android:verticalSpacing="5dp"
	  		android:horizontalSpacing="5dp"
	  		android:columnWidth="60dip"
	  		android:stretchMode="columnWidth"
	  		android:gravity="center"/>

	</LinearLayout>
	
	<!-- 버튼-->
	<LinearLayout
		android:id="@+id/llBottomLayout"
		android:orientation="horizontal"
		android:layout_width="fill_parent"
		android:layout_height="wrap_content"
		android:layout_alignParentBottom="true"
		android:gravity="center_horizontal|bottom" 
		android:layout_gravity="center_horizontal|bottom" 
		android:layout_weight="1"
		android:padding="5dp"
		android:background="#747574">
		<Button 
			android:id="@+id/btnSelectOk"
			android:layout_width="80dp"
			android:layout_height="65px"
			android:textSize="16sp"
			android:text="Ok"
			android:layout_weight="1" />
		<Button 
			android:id="@+id/btnSelectCancel"
			android:layout_width="80dp"
			android:layout_height="65px"
			android:textSize="16sp"
			android:text="Cancel"
			android:layout_weight="1" />		
	</LinearLayout>  	
</RelativeLayout>