ImageSwitcher&Gallery练习

先看图再说：


布局如下：

<?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="fill_parent"
    />
    
    <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="5dp"
    />
</RelativeLayout>

View：

package com.dc.app;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.Window;
import android.view.animation.AnimationUtils;
import android.widget.AdapterView;
import android.widget.Gallery;
import android.widget.ImageSwitcher;
import android.widget.ImageView;
import android.widget.Toast;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.ViewSwitcher.ViewFactory;

import com.dc.adapter.ImageAdapter;

public class App extends Activity implements ViewFactory{
	
	ImageAdapter adapter;
	ImageSwitcher switcher;
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.main);
        switcher=(ImageSwitcher)findViewById(R.id.switcher);
        switcher.setFactory(this);
      //系统的anim中的fade_in.xml 
        switcher.setInAnimation(AnimationUtils.loadAnimation(this, 
                android.R.anim.fade_in)); 
        //系统的anim中的fade_out.xml 
        switcher.setOutAnimation(AnimationUtils.loadAnimation(this, 
                android.R.anim.fade_out)); 
        
        Gallery gallery=(Gallery)findViewById(R.id.gallery);
        adapter=new ImageAdapter(this);
        switcher.setImageResource(adapter.images[0]); 
        gallery.setAdapter(adapter);
//        gallery.setOnItemSelectedListener(new OnItemSelectedListener() {
//
//			@Override
//			public void onItemSelected(AdapterView<?> parent, View view, int position,
//					   long id) {
//				// TODO Auto-generated method stub
//				  switcher.setImageResource(adapter.images[position]); 
//			}
//
//			@Override
//			public void onNothingSelected(AdapterView<?> parent) {
//				// TODO Auto-generated method stub
//				Toast.makeText(App.this, "please select one", Toast.LENGTH_LONG).show();
//			}
//		});
        gallery.setOnItemClickListener(new OnItemClickListener() {

			@Override
			public void onItemClick(AdapterView<?> parent, View view, int position,
					   long id) {
				// TODO Auto-generated method stub
				switcher.setImageResource(adapter.images[position]); 
			}
		});
        
       
        
    }

	@Override
	public View makeView() {
		// TODO Auto-generated method stub
		return new ImageView(this);
	}
}

适配器：

package com.dc.adapter;

import com.dc.app.R;
import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;

public class ImageAdapter extends BaseAdapter {

	Context context;
	public Integer[] images={
			R.drawable.icon,
			R.drawable.image_0,
			R.drawable.image_1,
			R.drawable.image_2,
			R.drawable.image_3,
			R.drawable.image_4,
			R.drawable.image_5,
			R.drawable.image_6,
			R.drawable.image_7,
			R.drawable.image_8,
			R.drawable.image_9,
			};
	
	public ImageAdapter(Context context){
		this.context=context;
	}
	@Override
	public int getCount() {
		// TODO Auto-generated method stub
		return images.length;
	}

	@Override
	public Object getItem(int position) {
		// TODO Auto-generated method stub
		return position;
	}

	@Override
	public long getItemId(int position) {
		// TODO Auto-generated method stub
		return position;
	}

	@Override
	public View getView(int position, View convertView, ViewGroup parent) {
		// TODO Auto-generated method stub
		ImageView imageView=new ImageView(context);
		imageView.setImageResource(images[position]);
//		imageView.setLayoutParams(new Gallery.LayoutParams(120, 100));
		imageView.setMaxWidth(120);
		imageView.setMaxHeight(100);
		imageView.setAdjustViewBounds(true);
		imageView.setScaleType(ImageView.ScaleType.FIT_CENTER);
		return imageView;
	}

}

评论

1 楼 tifang 2011-08-31  

我用这个代码的时候会报错， switcher.setFactory(this);