main.xml....................

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="horizontal"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="@drawable/background"
    android:id="@+id/layout"
    >
</LinearLayout>

activi..............................

package com.example.ui;

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

public class MainActivity extends Activity {

private ImageView [] img=new ImageView[4];   //声明保存一个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.j1,R.drawable.j2,R.drawable.j3,R.drawable.w1
 };
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.main);
  
  LinearLayout layout=(LinearLayout)findViewById(R.id.layout);//获取个xml文件中定义的线性布局管理器
  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, 5);//设置ImageView组件的内边距
   LayoutParams params=new LayoutParams(253,148);//设置图片的宽度和高度
   img[i].setLayoutParams(params);//为ImageView组件设置布局参数
   layout.addView(img[i]);//将ImageView组件添加到布局管理器中
  }
 }

@Override
 public boolean onCreateOptionsMenu(Menu menu) {
  // Inflate the menu; this adds items to the action bar if it is present.
  getMenuInflater().inflate(R.menu.main, menu);
  return true;
 }

}

效果如下图：