Android手机操作系统的应用方式灵活，简单，深受广大编程爱好者的喜爱。尤其是它的开源代码，使得我们能够方便的得到自己想要的功能需求。今天我们就为大家带来了有关Android图片浏览的相关方法。
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首先是Android图片浏览中layout xml:

java代码：

 [font=宋体]< ?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">
    < ImageSwitcher
    Android:id="@+id/switcher"
    Android:layout_width="fill_parent"
    Android:layout_height="fill_parent"
    Android:layout_alignParentTop="true"
    Android:layout_alignParentLeft="true" />
    < Gallery
    Android:id="@+id/gallery"
    Android:background="#55000000"
    Android:layout_width="fill_parent"
    Android:layout_height="60dp"
    Android:layout_alignParentBottom="true"
    Android:layout_alignParentLeft="true"
    Android:gravity="center_vertical"
    Android:spacing="16dp" />
    < /RelativeLayout> [/font]

layout里面用到了前面所说的两个控件，ImageSwitcher用啦显示全图，Gallery用来显示缩略图。着重看看ImageSwitcher,在ImageSwitcher1中需要实现ViewSwitcher.ViewFactory这个接口，这个接口里有个方法makeView，这样就产生了用来显示图片的view. ImageSwitcher调用过程是这样的，首先要有一个Factory为它提供一个View，然后ImageSwitcher就可以初始化各种资源了。注意在使用一个ImageSwitcher之前，一定要调用setFactory方法，要不setImageResource这个方法会报空指针异常。

       下面是Android图片浏览代码：

java代码：

  [font=宋体]package com.zx.imageswitcher;

    import Android.app.Activity;
    import Android.content.Context;
    import Android.os.Bundle;
    import Android.view.View;
    import Android.view.ViewGroup;
    import Android.view.animation.AnimationUtils;
    import Android.widget.AdapterView;
    import Android.widget.BaseAdapter;
    import Android.widget.Gallery;
    import Android.widget.ImageSwitcher;
    import Android.widget.ImageView;
    import Android.widget.ViewSwitcher;
    import Android.widget.Gallery.LayoutParams;

    public class ImageSwitcherTest extends Activity implements AdapterView.OnItemSelectedListener, ViewSwitcher.ViewFactory{
    private ImageSwitcher mSwitcher;
    private Integer[] mThumbIds = {
    R.drawable.sample_thumb_0, R.drawable.sample_thumb_1, R.drawable.sample_thumb_2, R.drawable.sample_thumb_3, R.drawable.sample_thumb_4, R.drawable.sample_thumb_5, R.drawable.sample_thumb_6, R.drawable.sample_thumb_7};
    private Integer[] mImageIds = {
    R.drawable.sample_0, R.drawable.sample_1, R.drawable.sample_2, R.drawable.sample_3, R.drawable.sample_4, R.drawable.sample_5, R.drawable.sample_6, R.drawable.sample_7};
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    mSwitcher = (ImageSwitcher) findViewById(R.id.switcher);
    mSwitcher.setFactory(this);
    mSwitcher.setInAnimation(AnimationUtils.loadAnimation(this, Android.R.anim.fade_in)); mSwitcher.setOutAnimation(AnimationUtils.loadAnimation(this, Android.R.anim.fade_out));
    Gallery g = (Gallery) findViewById(R.id.gallery);
    g.setAdapter(new ImageAdapter(this));
    g.setOnItemSelectedListener(this);
    }
    /* * override for ViewSwitcher.ViewFactory#makeView() */
    public View makeView() {
    ImageView i = new ImageView(this);
    i.setBackgroundColor(0xFF000000);
    i.setScaleType(ImageView.ScaleType.FIT_CENTER);
    i.setLayoutParams(new ImageSwitcher.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
    return i;
    }
    /*
    * override for
    * AdapterView.OnItemSelectedListener#onItemSelected()
    */
    public void onItemSelected(AdapterView parent, View v, int position, long id) { mSwitcher.setImageResource(mImageIds[position]);
    }
    /*
    * override for AdapterView.OnItemSelectedListener#onNothingSelected()
    */
    public void onNothingSelected(AdapterView< ?> arg0) {
    // TODO Auto-generated method stub
    }
    public class ImageAdapter extends BaseAdapter {
    public ImageAdapter(Context c) {
    mContext = c;
    }
    public int getCount() {
    return mThumbIds.length;
    }
    public Object getItem(int position) {
    return position;
    }
    public long getItemId(int position) {
    return position;
    }
    public View getView(int position, View convertView, ViewGroup parent) {
    ImageView i = new ImageView(mContext);
    i.setImageResource(mThumbIds[position]);
    i.setAdjustViewBounds(true);
    i.setLayoutParams(new Gallery.LayoutParams( LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
    i.setBackgroundResource(R.drawable.picture_frame);
    return i;
    }
    private Context mContext;
    }

    } [/font]