android ViewSwticher

import java.util.ArrayList;
import java.util.List;

import android.app.Activity;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.ViewSwitcher;
import android.widget.ViewSwitcher.ViewFactory;

import com.example.android_lb_day2.R;

public class ViewSwitcherTest extends Activity {
       //定义一个常量，用于显示每屏的应用程序总数
       public static final int SCREEN=12;
       //每个程序的名字和图标
       public static class DataItem{
             public String name ;
             public Drawable drawable ;
      }
       //保存所有程序的集合
      List<DataItem> list = new ArrayList<DataItem>();
       //记录当前正在显示第几屏的程序
       private int screenNo =-1;
       //保存程序所占的总屏数
       private int screenCount ;
      
      ViewSwitcher switcher;
      LayoutInflater inflater;
       @Override
       protected void onCreate(Bundle savedInstanceState) {
             // TODO Auto-generated method stub
             super.onCreate(savedInstanceState);
            setContentView(R.layout. activity_swticher);
             inflater=LayoutInflater.from( this);
            getScreenApplication();
            
             /**
             * 计算应用程序所占的总屏数,如果能整出SCREEN，除法的结果就是总屏数、否则要加1
             * */
             screenCount =list .size()%SCREEN==0? list.size()/SCREEN : list.size()/SCREEN+1;
            
             switcher=(ViewSwitcher)findViewById(R.id.swticher);
             switcher.setFactory(new ViewFactory() {
                  
                   @Override
                   public View makeView() {
                         //加载布局,就是一个GridView组件
                         return inflater.inflate(R.layout.swticher_gridview, null);
                  }
            });
             //页面加载的时候先显示第一屏
            next( null);
      }
       public void next(View v) {
             if(screenNo <screenCount-1){
                   screenNo++;
                   //为Switcher显示过程设置动画
                   switcher.setInAnimation(this,R.anim.slide_in_right);
                   //为Switcher隐藏过程设置动画
                   switcher.setOutAnimation(this,R.anim.slide_out_left);
                   //控制下一屏将要显示的GridView对应的Adapter
                  ((GridView) switcher.getNextView()).setAdapter(adapter );
                   switcher.showNext();
            }
            
      }
       public void pre(View v) {
             if(screenNo >0){
                   screenNo--;
                   //为Switcher显示过程设置动画
                   switcher.setInAnimation(this,R.anim.slide_out_left);
                   //为Switcher隐藏过程设置动画
                   switcher.setOutAnimation(this,R.anim.slide_in_right);
                   //控制下一屏将要显示的GridView对应的Adapter
                  ((GridView) switcher.getNextView()).setAdapter(adapter );
                   switcher.showPrevious();
            }
            
      }
       BaseAdapter adapter =  new BaseAdapter() {
                  
                   @Override
                   public View getView(int position, View convertView, ViewGroup parent) {
                        View view = convertView;
                         if(convertView==null){
                               //加载switcher_label布局文件
                              view= inflater.inflate(R.layout.swticher_label, null);
                        }
                         //获取他们的id并为控件赋值
                        ImageView imageView =(ImageView)view.findViewById(R.id.labelImg );
                        imageView.setImageDrawable(getItem(position). drawable);
                        
                        TextView text = (TextView)view.findViewById(R.id.labelText );
                        text.setText(getItem(position). name);
                         return view;
                  }
                  
                   @Override
                   public long getItemId(int position) {
                         // TODO Auto-generated method stub
                         return position;
                  }
                  
                   @Override
                   public DataItem getItem(int position) {
                        
                         return list .get(screenNo* SCREEN+position);
                  }
                  
                   @Override
                   public int getCount() {
                         //如果到了最后一屏
                         if(screenNo ==screenCount -1&&list.size()% SCREEN!=0){
                               return list .size()&SCREEN;
                        }
                         return SCREEN ;
                  }
            };
             //循环给List里面加入DataItem集合
             public void getScreenApplication(){
                   for(int i =0;i<100;i++){
                        String label= ""+i;
                        Drawable daDrawable =getResources().getDrawable(R.drawable.ic_launcher);
                        DataItem item = new DataItem();
                        item. name=label;
                        item. drawable=daDrawable;
                         list.add(item);
                  }
            }
      
            

}

<span style="font-size:14px;"><?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" >    <ViewSwitcher        android:id="@+id/swticher"        android:layout_width="wrap_content"        android:layout_height="wrap_content" >    </ViewSwitcher >    <Button        android:id="@+id/pre"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignParentBottom="true"        android:layout_alignParentLeft="true"        android:text="<"        android:onClick="pre" />    <Button        android:id="@+id/next"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignParentBottom="true"        android:layout_alignParentRight="true"        android:text=">"        android:onClick="next" /></RelativeLayout></span>

<?xml version="1.0" encoding= "utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical"    android:gravity="center" >    <ImageView        android:id="@+id/labelImg"        android:layout_width="wrap_content"        android:layout_height="wrap_content" />    <TextView        android:id="@+id/labelText"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="TextView"        android:gravity="center" /></LinearLayout><span style="color:#008080;"></span>

<?xml version="1.0" encoding= "utf-8"?><set xmlns:android="http://schemas.android.com/apk/res/android" >    <translate android:fromXDelta= "0"        android:toXDelta="-100%p"        android:duration="@android:integer/config_mediumAnimTime" >           </translate ></set><?xml version="1.0" encoding= "utf-8"?><set xmlns:android="http://schemas.android.com/apk/res/android" >    <translate android:fromXDelta= "100%p"        android:toXDelta="0"        android:duration="@android:integer/config_mediumAnimTime" >           </translate ></set>