Android 中的ImageSwitcher 和Gallery结合使用

（1）gallery 即绑定一个adapter 即可。

（2）Activity 实现ViewFactory。并实现其中的构造方法

makeView();。这个方法主要是返回一个view对象。并为switcher设置imageSwitcher.setFactory(this);--这个Factory 是用来切换ImageSwitcher的view的。

实现OnItemSelectedListener为gallery重写

onNothingSelected();

onItemSelected（）;

package com.bsn.cc;

import android.app.Activity;
import android.content.Context;
import android.content.res.TypedArray;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.AnimationUtils;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.Gallery.LayoutParams;
import android.widget.BaseAdapter;
import android.widget.Gallery;
import android.widget.ImageSwitcher;
import android.widget.ImageView;
import android.widget.ViewSwitcher.ViewFactory;

public class ImageSwitcherActivity extends Activity implements OnItemSelectedListener,ViewFactory{
private Gallery gallery;
private ImageSwitcher imageSwitcher;
private ImageAdapter imageAdapter;
private int []resId={
R.drawable.item1, R.drawable.item2, R.drawable.item3, R.drawable.item4,
R.drawable.item5, R.drawable.item6, R.drawable.item7,
R.drawable.item8, R.drawable.item9, R.drawable.item10,
R.drawable.item11, R.drawable.item12, R.drawable.item13,
R.drawable.item14, R.drawable.item15
};
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

gallery = (Gallery) findViewById(R.id.dddd);
imageAdapter = new ImageAdapter(this);
gallery.setAdapter(imageAdapter);
gallery.setOnItemSelectedListener(this);
imageSwitcher = (ImageSwitcher) findViewById(R.id.imageswitcher);
imageSwitcher.setFactory(this);

imageSwitcher.setInAnimation(AnimationUtils.loadAnimation(this,
android.R.anim.fade_in));
imageSwitcher.setOutAnimation(AnimationUtils.loadAnimation(this,
android.R.anim.fade_out));
}
private class ImageAdapter extends BaseAdapter{
int mGalleryItemBackground;
private Context mContext;
public ImageAdapter(Context context)
{
mContext = context;
// 这里为自定义属性R.styleable.Gallery ..中的属性定义的是gallery的默认边框
TypedArray typedArray = obtainStyledAttributes(R.styleable.Gallery);
mGalleryItemBackground = typedArray.getResourceId(
R.styleable.Gallery_android_galleryItemBackground, 0);
}
@Override
public int getCount() {
return Integer.MAX_VALUE;
}
@Override
public Object getItem(int arg0) {
// TODO Auto-generated method stub
return arg0;
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ImageView imageView=new ImageView(mContext);
imageView.setImageResource(resId[position]);
imageView.setScaleType(ImageView.ScaleType.FIT_XY);
imageView.setLayoutParams(new Gallery.LayoutParams(136,88));
imageView.setBackgroundResource(mGalleryItemBackground);
return imageView;
}
}
@Override
public View makeView() {

ImageView imageView = new ImageView(this);
imageView.setBackgroundColor(0xFF000000);
imageView.setScaleType(ImageView.ScaleType.FIT_CENTER);
imageView.setLayoutParams(new ImageSwitcher.LayoutParams(
LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));

return imageView;
}
@Override
public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
imageSwitcher.setImageResource(resId[arg2 % resId.length]);

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

}
}