画廊视图Gallery

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1.布局

 1 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 2     xmlns:tools="http://schemas.android.com/tools" 3     android:layout_width="match_parent" 4     android:layout_height="match_parent" 5     android:orientation="vertical" 6     tools:context=".AndroidGalleryActivity" > 7  8     <ImageSwitcher 9         android:id="@+id/imgswi"10         android:layout_width="320dp"11         android:layout_height="320dp" />12 13     <Gallery14         android:id="@+id/gallery"15         android:layout_width="match_parent"16         android:layout_height="wrap_content"17         android:layout_marginTop="25dp"18         android:unselectedAlpha="0.6"19         android:spacing="3pt"20          />21 22 </LinearLayout>

2.逻辑控制

  1 package com.example.androidgallery;  2   3 import android.os.Bundle;  4 import android.app.Activity;  5 import android.content.res.TypedArray;  6 import android.support.v4.view.ViewPager.LayoutParams;  7 import android.view.Menu;  8 import android.view.View;  9 import android.view.ViewGroup; 10 import android.view.animation.AnimationUtils; 11 import android.widget.AdapterView; 12 import android.widget.AdapterView.OnItemSelectedListener; 13 import android.widget.BaseAdapter; 14 import android.widget.Gallery; 15 import android.widget.ImageSwitcher; 16 import android.widget.ImageView; 17 import android.widget.ViewSwitcher.ViewFactory; 18  19 public class AndroidGalleryActivity extends Activity { 20  21     int[] imageIds=new int[]{ 22     R.drawable.mm, 23     R.drawable .mm2, 24     R.drawable.mm3, 25     R.drawable.mm4 26     } ; 27      28     @Override 29     protected void onCreate(Bundle savedInstanceState) { 30         super.onCreate(savedInstanceState); 31         setContentView(R.layout.activity_android_gallery); 32         final Gallery gallery=(Gallery)this.findViewById(R.id.gallery); 33         final ImageSwitcher imgswi=(ImageSwitcher)this.findViewById(R.id.imgswi); 34         //设置ViewFactory对象 35         imgswi.setFactory(new ViewFactory() { 36              37             @Override 38             public View makeView() { 39                 ImageView imageView=new ImageView(AndroidGalleryActivity.this); 40                 imageView.setBackgroundColor(0xff0000); 41                 imageView.setScaleType(ImageView.ScaleType.FIT_CENTER); 42                 imageView.setLayoutParams(new ImageSwitcher.LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT)); 43                 return imageView; 44             } 45         }); 46         //设置图片更换动画效果 47         imgswi.setInAnimation(AnimationUtils.loadAnimation(this, android.R.anim.fade_in)); 48         imgswi.setOutAnimation(AnimationUtils.loadAnimation(this,android.R.anim.fade_out)); 49         //创建一个BaseAdapter对象，负责提供Gallery显示每张图片 50         BaseAdapter adapter=new BaseAdapter() { 51              52             @Override 53             public View getView(int position, View convertview, ViewGroup parent) { 54                 //创建一个ImageView 55                 ImageView imageView=new ImageView(AndroidGalleryActivity.this); 56                 imageView.setImageResource(imageIds[position%imageIds.length]); 57                 //设置ImageView缩放类型 58                 imageView.setScaleType(ImageView.ScaleType.FIT_XY); 59                 imageView.setLayoutParams(new Gallery.LayoutParams(75,100)); 60                 /*TypedArray typeArray=obtainStyledAttributes(R.styleable.Gallery); 61                 imageView.setBackgroundResource(TypedArray)*/ 62                 return imageView; 63             } 64              65             @Override 66             public long getItemId(int arg0) { 67                 // TODO Auto-generated method stub 68                 return arg0; 69             } 70              71             @Override 72             public Object getItem(int arg0) { 73                 // TODO Auto-generated method stub 74                 return arg0; 75             } 76              77             @Override 78             public int getCount() { 79                 // TODO Auto-generated method stub 80                 return imageIds.length; 81             } 82         }; 83          84         gallery.setAdapter(adapter); 85         gallery.setOnItemSelectedListener(new OnItemSelectedListener() { 86  87             @Override 88             public void onItemSelected(AdapterView<?> parent, View view, 89                     int position, long id) { 90                 // TODO Auto-generated method stub 91                 imgswi.setImageResource(imageIds[position%imageIds.length]); 92             } 93  94             @Override 95             public void onNothingSelected(AdapterView<?> parent) { 96                 // TODO Auto-generated method stub 97                  98             } 99             100         });101     }102 103     @Override104     public boolean onCreateOptionsMenu(Menu menu) {105         // Inflate the menu; this adds items to the action bar if it is present.106         getMenuInflater().inflate(R.menu.activity_android_gallery, menu);107         return true;108     }109 110 }

画廊视图Gallery

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