android开发_ImageSwitcher

新建项目：

项目结构：

运行效果：

代码部分：

imageswitcherpage.xml

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent"> 
    
    <ImageSwitcher android:id="@+id/switcher"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_alignParentTop="true"
        android:layout_alignParentLeft="true"
    />
    
    <Gallery android:id="@+id/gallery"
        android:background="#55000000"
        android:layout_width="match_parent"
        android:layout_height="60dp"
        android:layout_alignParentBottom="true"
        android:layout_alignParentLeft="true"
        
        android:gravity="center_vertical"
        android:spacing="16dp"
    />

</RelativeLayout>

MainActivity.java

package com.b510;

import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;
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.AdapterView.OnItemSelectedListener;
import android.widget.Gallery.LayoutParams;
import android.widget.ViewSwitcher.ViewFactory;

public class MainActivity extends Activity implements OnItemSelectedListener,
        ViewFactory {
    /** 定义一个切换图片对象is */
    private ImageSwitcher is;
    /** 定义一个画廊Galley对象 */
    private Gallery gallery;

    /** 定义图片资源 */
    private Integer[] mThumbIds = { R.drawable.b, R.drawable.p4, R.drawable.d,
            R.drawable.f, R.drawable.p8, R.drawable.p1, R.drawable.p2,
            R.drawable.p3, R.drawable.c, R.drawable.p5, R.drawable.p6,
            R.drawable.p7, R.drawable.g, };
    /** 定义图片的id */
    private Integer[] mImageIds = { R.drawable.b, R.drawable.p4, R.drawable.d,
            R.drawable.f, R.drawable.p8, R.drawable.p1, R.drawable.p2,
            R.drawable.p3, R.drawable.c, R.drawable.p5, R.drawable.p6,
            R.drawable.p7, R.drawable.g, };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        // 关掉在屏幕顶端的标题
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        // 得到图片的布局文件
        setContentView(R.layout.imageswitcherpage);
        // 初始化is对象
        is = (ImageSwitcher) findViewById(R.id.switcher);
        // 设置工厂用来创建两种视图的ViewSwitcher之间会翻转
        is.setFactory(this);
        // 定义的动画
        is.setInAnimation(AnimationUtils.loadAnimation(this,
                android.R.anim.fade_in));
        is.setOutAnimation(AnimationUtils.loadAnimation(this,
                android.R.anim.fade_out));

        gallery = (Gallery) findViewById(R.id.gallery);
        // 给画廊添加适配器
        gallery.setAdapter(new ImageAdapter(this));
        // 给画廊中的每一个item设置选择监听器
        gallery.setOnItemSelectedListener(this);
    }

    // 重写makeView方法
    @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;
    }

    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.e);
            return i;
        }

        private Context mContext;

    }

    @Override
    public void onItemSelected(AdapterView<?> parent, View view, int position,
            long id) {
        // 当每一个对象被选择时得到图像的id
        is.setImageResource(mImageIds[position]);

    }

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

    }
}