Android基础TOP6_3：Gally和ImageSwitcher实现画廊

结构：

Activity：

 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:orientation="vertical"
     android:paddingBottom="@dimen/activity_vertical_margin"
     android:paddingLeft="@dimen/activity_horizontal_margin"
     android:paddingRight="@dimen/activity_horizontal_margin"
     android:paddingTop="@dimen/activity_vertical_margin"
     tools:context="com.example.top6_3.MainActivity" >
    <Gallery
     android:id="@+id/gly"
     android:layout_height="60dp"
     android:layout_width="fill_parent"
     android:animationDuration=""
     android:gravity="center_vertical"
     android:spacing="20dp"
     android:unselectedAlpha="0.5"
     android:background="#55000000"
      />
 <ImageSwitcher
     android:paddingTop="10dp"
     android:id="@+id/is"
     android:layout_width="wrap_content"
     android:layout_height="match_parent"></ImageSwitcher>

 </LinearLayout>

JAVA:

MainActivity类：

 package com.example.top6_3;

 import android.app.Activity;
 import android.os.Bundle;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
 import android.view.animation.Animation;
 import android.view.animation.AnimationUtils;
 import android.widget.Gallery.LayoutParams;
 import android.widget.AdapterView;
 import android.widget.Gallery;
 import android.widget.ImageSwitcher;
 import android.widget.ImageView;
 import android.widget.ViewSwitcher.ViewFactory;

 public class MainActivity extends Activity {
     private Gallery gal;
     private ImageView iv;
     private ImageAdapter adapter;
     private ImageSwitcher is;
     private static final int[]  imgslds={
         R.drawable.bjl,
         R.drawable.dfhgc,
         R.drawable.fg,
         R.drawable.gj
 };
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
          is=(ImageSwitcher) findViewById(R.id.is);
          is.setFactory(new ViewFactory() {

             @Override
             public View makeView() {
                 // TODO Auto-generated method stub
                 ImageView i=new ImageView(getApplicationContext());
                 //i.setBackgroundColor(0Xff000000);
                 i.setScaleType(ImageView.ScaleType.FIT_CENTER);
                 i.setLayoutParams(new ImageSwitcher.LayoutParams(LayoutParams.MATCH_PARENT,
                         LayoutParams.MATCH_PARENT));
                 return i;
             }
         });
          is.setInAnimation(AnimationUtils.loadAnimation(this, android.R.anim.fade_in));
       is.setOutAnimation(AnimationUtils.loadAnimation(this, android.R.anim.fade_out));
       gal=(Gallery) findViewById(R.id.gly);
       adapter=new ImageAdapter(this);
       gal.setAdapter(adapter);
        gal.setOnItemSelectedListener(gaILidstener);
        }
            private Gallery.OnItemSelectedListener gaILidstener=new Gallery.OnItemSelectedListener() {

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

            @Override
            public void onNothingSelected(AdapterView<?> parent) {
                // TODO Auto-generated method stub

            }

            };
 }

ImageAdapter类：

 package com.example.top6_3;

 import android.R.integer;
 import android.content.Context;
 import android.view.Gravity;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.BaseAdapter;
 import android.widget.Gallery;
 import android.widget.ImageView;

 public class ImageAdapter extends BaseAdapter {
     private Context context;

     private static final int[]  imgslds={
         R.drawable.bjl,
         R.drawable.dfhgc,
         R.drawable.fg,
         R.drawable.gj
 };
     public ImageAdapter(Context c){
         context=c;

     }
     public int getCount() {
         // TODO Auto-generated method stub
         //
         return imgslds.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 iv=new ImageView(context);
         iv.setImageResource(imgslds[position]);
         iv.setScaleType(ImageView.ScaleType.FIT_CENTER);
         iv.setLayoutParams(new Gallery.LayoutParams(,));
         //iv.setBackgroundResource(R.drawable.bjl);
         return iv; 

     }

 }

效果图：