ImageSwitcher 练习（android）

ImageSwitch 需要一个 ViewFactory 接口方法，返回一个 ImageView 对像，同时指定 setFactory 方法

其中试了试用 ImageView 实现 ImageSwitcher ，并没有发现有什么不同，还有是其它什么不同呢？

 

代码如下：

xml

 

<? xml version="1.0" encoding="utf-8" ?>
< LinearLayout  xmlns:android ="http://schemas.android.com/apk/res/android"
    android:layout_width ="fill_parent"
    android:layout_height ="fill_parent"
    android:orientation ="vertical"   >

     < TextView
         android:layout_width ="fill_parent"
        android:layout_height ="wrap_content"
        android:text ="@string/hello"   />
      < ImageView 
          android:id ="@+id/iv"
         android:layout_width ="wrap_content"
         android:layout_height ="wrap_content"
          />
      < Button 
          android:id ="@+id/btn"
         android:layout_width ="wrap_content"
         android:layout_height ="wrap_content"
         android:text ="切换图片"
          />
     
      < ImageSwitcher 
          android:id ="@+id/imageswitch"
         android:layout_width ="wrap_content"
         android:layout_height ="wrap_content"   
          ></ ImageSwitcher >
      < Button 
          android:id ="@+id/btn2"
         android:layout_width ="wrap_content"
         android:layout_height ="wrap_content"
         android:text ="切换图片2"
          />
</ LinearLayout >

 

java代码

package zziss.android.imageswitchtest;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageSwitcher;
import android.widget.ImageView;
import android.widget.ViewSwitcher.ViewFactory;

public  class ImageSwitchTestActivity  extends Activity  implements ViewFactory {
     /**  Called when the activity is first created.  */
     private ImageView iv;
     private ImageSwitcher imw;
     private Button    btn;
     private Button    btn2;
     private  int       i;
     private  int       index;
    @Override
     public  void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        iv = (ImageView) this.findViewById(R.id.iv);
        btn = (Button) this.findViewById(R.id.btn);
        btn2 = (Button) this.findViewById(R.id.btn2);
        
        imw  = (ImageSwitcher) this.findViewById(R.id.imageswitch);
        imw.setFactory( this);
        i = 0;
        index =0;
        btn.setOnClickListener( new View.OnClickListener() {
            
            @Override
             public  void onClick(View v) {
                 //  TODO Auto-generated method stub
                 /* if (i==0)
                {
                    iv.setImageResource(R.drawable.png1410);
                    i=1;
                }
                else
                {
                    iv.setImageResource(R.drawable.png1411);
                    i=0;
                } */
                 if (index>=3)
                    index = 0;
                iv.setImageResource(imagelist[index]);
                index++;
            }
        });
        
        btn2.setOnClickListener( new View.OnClickListener() {
            
            @Override
             public  void onClick(View v) {
                 //  TODO Auto-generated method stub
                 if (index>=3)
                    index = 0;
                imw.setImageResource(imagelist[index]);
                index++;
            }
        });
        
    }
    
     private  static  int[] imagelist =
        {
            R.drawable.png1410,
            R.drawable.png1411,
            R.drawable.png1412
        };
    @Override
     public View makeView() {
         //  TODO Auto-generated method stub
         return  new ImageView( this);
    }
}