android之横向滚动图

问了下做android的老湿们，原来横向滚动的玩意用viewPager，我一直以为和ios一样用scrollview，蛋疼了下。。。。

模式也是控件+适配器，直接上代码

MainActivity.java

 1 package com.example.testviewpager; 2  3 import java.util.ArrayList; 4 import java.util.List; 5 import android.app.Activity; 6 import android.os.Bundle; 7 import android.support.v4.view.ViewPager; 8 import android.view.LayoutInflater; 9 import android.view.Menu;10 import android.view.View;11 import android.widget.ImageView;12 13 public class MainActivity extends Activity {14 15     private List<ObjectEntity> dataSource;16     private List<View>             itemViews;17     18     @Override19     protected void onCreate(Bundle savedInstanceState) {20         super.onCreate(savedInstanceState);21         setContentView(R.layout.activity_main);22         23         initItems();24         25         ViewPager viewPager = (ViewPager)findViewById(R.id.mainViewPager);26         MyAdapter viewPageAdapter = new MyAdapter(this,dataSource,itemViews);27         28         viewPager.setAdapter(viewPageAdapter);29     }30 31     private void initItems() {32         // TODO Auto-generated method stub33 34         dataSource = new ArrayList<ObjectEntity>();35         for (int i = 0; i < 5; i++) {36             37             ObjectEntity objectEntity = new ObjectEntity();38             39             objectEntity.resId = R.drawable.guangzhou;40             objectEntity.imgUrl = "http://b.hiphotos.baidu.com/album/w%3D2048/sign=dd21c55132fa828bd1239ae3c9274034/d31b0ef41bd5ad6ebcdb25be80cb39dbb6fd3c47.jpg";41         42             dataSource.add(objectEntity);43         }44         45         itemViews = new ArrayList<View>();46         for (int i = 0; i < dataSource.size(); i++) {47             48             LayoutInflater inflater = getLayoutInflater();49             View view = inflater.inflate(R.layout.item, null);50             51             itemViews.add(view);52         }53     }54 }

对象实体ObjectEntity.java

1 package com.example.testviewpager;2 3 import android.R.string;4 5 public class ObjectEntity {6 7     public int    resId;8     public String imgUrl;9 }

适配器Mydapter.java，命名不是很好，不过仅仅用来学习足够～

 1 package com.example.testviewpager; 2  3 import java.util.List; 4  5 import net.tsz.afinal.FinalBitmap; 6 import android.content.Context; 7 import android.support.v4.view.PagerAdapter; 8 import android.view.View; 9 import android.view.ViewGroup;10 import android.widget.ImageView;11 12 public class MyAdapter extends PagerAdapter {13 14     private Context                _context;15     private List<ObjectEntity> _dataSource;16     private List<View>             _views;17     18     private FinalBitmap         _finalMab;19     20     public MyAdapter(Context context,List<ObjectEntity> ds,List<View> views) {21 22         _context = context;23         _dataSource = ds;24         _views = views;25     }26 27     @Override28     public int getCount() {29         // TODO Auto-generated method stub30         return _views.size();31     }32 33     @Override34     public void destroyItem(ViewGroup container, int position, Object object) {35         // TODO Auto-generated method stub36         37         container.removeView(_views.get(position));38     }39 40     @Override41     public Object instantiateItem(ViewGroup container, int position) {42         // TODO Auto-generated method stub43         44         View itemView = _views.get(position);45         ObjectEntity objectEntity = _dataSource.get(position);46         47         ImageView imageView = (ImageView) itemView.findViewById(R.id.imageView1);48         49         _finalMab = FinalBitmap.create(_context);//初始化FinalBitmap模块50         _finalMab.configLoadingImage(objectEntity.resId);51         _finalMab.display(imageView,objectEntity.imgUrl);52         53         container.addView(itemView);54         55         return itemView;56     }57 58     @Override59     public boolean isViewFromObject(View arg0, Object arg1) {60         // TODO Auto-generated method stub61         return arg0 == arg1;62     }63 64 }

下面是布局文件activity_main.xml

 1 <RelativeLayout 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:paddingBottom="@dimen/activity_vertical_margin" 6     android:paddingLeft="@dimen/activity_horizontal_margin" 7     android:paddingRight="@dimen/activity_horizontal_margin" 8     android:paddingTop="@dimen/activity_vertical_margin" 9     tools:context=".MainActivity" >10     11     <android.support.v4.view.ViewPager12         android:id="@+id/mainViewPager"13         android:layout_width="fill_parent"14         android:layout_height="fill_parent" >15 16     </android.support.v4.view.ViewPager>17     18 </RelativeLayout>

作为子项加载到ViewPager里面的item.xml

 1 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 2     android:layout_width="fill_parent" 3     android:layout_height="fill_parent" > 4  5     <LinearLayout 6         android:layout_width="fill_parent" 7         android:layout_height="fill_parent" > 8  9         <ImageView10             android:id="@+id/imageView1"11             android:layout_width="fill_parent"12             android:layout_height="fill_parent"13             android:scaleType="fitXY" />14 15     </LinearLayout>16 17 </LinearLayout>

更多相关文章

随机推荐