Android 中的ImageSwitcher 和Gallery結合使用

（1）gallery 即綁定一個adapter 即可。

（2）Activity 實現ViewFactory。並實現其中的構造方法

makeView();。這個方法主要是返回一個view對象。併爲switcher設置imageSwitcher.setFactory(this);--這個Factory 是用來切換ImageSwitcher的view的。

實現OnItemSelectedListener爲gallery重寫

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;
			// 這裏爲自定義屬性R.styleable.Gallery ..中的屬性定義的是gallery的默認邊框
			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) {
		
	}
}