Android入门之Gallery用法实例解析

本文实例介绍的Android的Gallery控件是个很不错的看图控件，可以大大减轻开发者对于看图功能的开发，并且效果也很美观。本文实例中的Gallery的用法，主要实现用反射机制来动态读取资源中的图片。

该实例代码运行的效果图如下：

 

main.xml源码如下:

Java程序源码如下：

package com.testImageView; 
 
import java.lang.reflect.Field; 
import java.util.ArrayList; 
 
import android.app.Activity; 
import android.content.Context; 
import android.graphics.Bitmap; 
import android.graphics.BitmapFactory; 
import android.os.Bundle; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.AdapterView; 
import android.widget.BaseAdapter; 
import android.widget.Gallery; 
import android.widget.ImageView; 
import android.widget.AdapterView.OnItemClickListener; 
 
public class testImageView extends Activity { 
  private Gallery mGallery; 
  @Override 
  public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.main); 
     
    mGallery = (Gallery)findViewById(R.id.gallery); 
    try { 
      mGallery.setAdapter(new ImageAdapter(this)); 
    } catch (IllegalArgumentException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
    } catch (IllegalAccessException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
    } 
    mGallery.setOnItemClickListener(new OnItemClickListener() { 
      public void onItemClick(AdapterView parent, View v, int position, long id) { 
        testImageView.this.setTitle(String.valueOf(position)); 
      } 
    }); 
  } 
   
  /* 
   * class ImageAdapter is used to control gallery source and operation. 
   */ 
  private class ImageAdapter extends BaseAdapter{ 
    private Context mContext; 
    private ArrayList imgList=new ArrayList(); 
    private ArrayList