ImageSwitcher和Gallery的运用

1.布局文件activity.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    
   >
<!-- ImageSwitcher的布局 -->
    <ImageSwitcher
        android:id="@+id/imageSwitcher1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
       
        android:layout_marginTop="184dp"
       >
          </ImageSwitcher>
        
<!-- Gallery的布局 -->
        <Gallery
            android:id="@+id/gallery1"
            android:layout_width="wrap_content"
            android:layout_height="60dp"
             android:gravity="center_horizontal"
            />

  
</RelativeLayout>

2.MainActivity.java

package cn.edu.cn.imageswitcher;

import android.os.Bundle;
import android.app.Activity;
import android.content.Context;
import android.content.res.TypedArray;
import android.view.Menu;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;

import android.view.animation.AnimationUtils;
import android.widget.AdapterView;

import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.BaseAdapter;
import android.widget.Gallery;
import android.widget.Gallery.LayoutParams;
import android.widget.ImageSwitcher;
import android.widget.ImageView;
import android.widget.ViewSwitcher.ViewFactory;

public class MainActivity extends Activity implements OnItemSelectedListener,
		ViewFactory {
	private ImageSwitcher is;
	private Gallery gallery;
	// 画廊显示的小图
	private Integer[] mThumIds = { R.drawable.a, R.drawable.b, R.drawable.c,
			R.drawable.d };
	// ImageSwitcher显示的所对应的大图
	private Integer[] mImageIds = { R.drawable.a, R.drawable.b, R.drawable.c,
			R.drawable.d };

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		// 此句话的含义为设置Activity无标题
		requestWindowFeature(Window.FEATURE_NO_TITLE);
		setContentView(R.layout.activity_main);
		// 查找组件
		is = (ImageSwitcher) this.findViewById(R.id.imageSwitcher1);
		is.setFactory(this);
		// 切入动画
		is.setInAnimation(AnimationUtils.loadAnimation(this,
				android.R.anim.slide_in_left));
		// 动画显示
		is.setInAnimation(AnimationUtils.loadAnimation(this,
				android.R.anim.slide_out_right));
		// 查找组件
		gallery = (Gallery) this.findViewById(R.id.gallery1);
		// 为Gallery设置适配器
		gallery.setAdapter(new ImageAdapter(this));
		// 设置监听事件
		gallery.setOnItemSelectedListener(this);

	}

	// 适配器继承自BaseAdapter
	public class ImageAdapter extends BaseAdapter {
		int mGalleryItemBackground;;

		public ImageAdapter() {
			// 为图片加边框
			TypedArray typedArray = obtainStyledAttributes(R.styleable.HelloGallery);
			mGalleryItemBackground = typedArray.getResourceId(
					R.styleable.HelloGallery_android_galleryItemBackground, 0);
			typedArray.recycle();
		}

		public ImageAdapter(Context c) {
			mContent = c;
		}

		@Override
		public int getCount() {

			return mThumIds.length;
		}

		@Override
		public Object getItem(int position) {

			return position;
		}

		@Override
		public long getItemId(int position) {

			return position;
		}

		@Override
		public View getView(int position, View convertView, ViewGroup parent) {

			ImageView i = new ImageView(mContent);
			i.setImageResource(mThumIds[position]);
			i.setAdjustViewBounds(true);
			i.setLayoutParams(new Gallery.LayoutParams(
					LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
			i.setBackgroundResource(mGalleryItemBackground);
			return i;

		}

	}

	private Context mContent;

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {

		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}

	@Override
	public View makeView() {

		ImageView i = new ImageView(this);
		i.setBackgroundColor(0XFF000000);
		i.setScaleType(ImageView.ScaleType.FIT_CENTER);
		i.setLayoutParams(new ImageSwitcher.LayoutParams(

		LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));

		return i;

	}

	@Override
	public void onItemSelected(AdapterView<?> parent, View view, int position,
			long id) {
		is.setImageResource(mImageIds[position]);

	}

	@Override
	public void onNothingSelected(AdapterView<?> arg0) {

	}

}

3.运行效果图