效果图：

res/layout/main.xml:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="@drawable/backgroud"
    android:id="@+id/layout">


</LinearLayout>

package com.example.test;


import android.app.Activity;
import android.os.Bundle;
import android.view.ViewGroup.LayoutParams;
import android.widget.ImageView;
import android.widget.LinearLayout;


public class MainActivity extends Activity {
     private ImageView[] img=new ImageView[4];//声明一个ImageView组件的数组
     private int[] imagePath=new int[]{ //声明并初始化一个保存访问图片的数组
    		 R.drawable.img01,R.drawable.img02,R.drawable.img03,R.drawable.img04
     };
     
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		//获取XML文件中定义的线性布局管理器
	    LinearLayout linearLayout =(LinearLayout)findViewById(R.id.layout);
	    for (int i = 0; i < imagePath.length; i++) {
			img[i]=new ImageView(this);//创建一个ImageView组件
			img[i].setImageResource(imagePath[i]);//为ImageView组件指定要显示的图片
			img[i].setPadding(5,5,5);//设置ImageView的内边距
			LayoutParams params=new LayoutParams(253,148);//设置图片宽度和高度
			img[i].setLayoutParams(params);//为ImageView组件设置布局参数
			linearLayout.addView(img[i]);//将ImageView组件添加到布局管理器中
			
		}
	}
}