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

package com.example.testviewpager;

import java.util.ArrayList;
import java.util.List;
import android.app.Activity;
import android.os.Bundle;
import android.support.v4.view.ViewPager;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.View;
import android.widget.ImageView;

public class MainActivity extends Activity {

    private List<ObjectEntity> dataSource;
    private List<View>             itemViews;
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        initItems();
        
        ViewPager viewPager = (ViewPager)findViewById(R.id.mainViewPager);
        MyAdapter viewPageAdapter = new MyAdapter(this,dataSource,itemViews);
        
        viewPager.setAdapter(viewPageAdapter);
    }

    private void initItems() {
        // TODO Auto-generated method stub

        dataSource = new ArrayList<ObjectEntity>();
        for (int i = 0; i < 5; i++) {
            
            ObjectEntity objectEntity = new ObjectEntity();
            
            objectEntity.resId = R.drawable.guangzhou;
            objectEntity.imgUrl = "http://b.hiphotos.baidu.com/album/w%3D2048/sign=dd21c55132fa828bd1239ae3c9274034/d31b0ef41bd5ad6ebcdb25be80cb39dbb6fd3c47.jpg";
        
            dataSource.add(objectEntity);
        }
        
        itemViews = new ArrayList<View>();
        for (int i = 0; i < dataSource.size(); i++) {
            
            LayoutInflater inflater = getLayoutInflater();
            View view = inflater.inflate(R.layout.item, null);
            
            itemViews.add(view);
        }
    }
}

对象实体ObjectEntity.java

package com.example.testviewpager;

import android.R.string;

public class ObjectEntity {

    public int    resId;
    public String imgUrl;
}

适配器Mydapter.java，命名不是很好，不过仅仅用来学习足够～

package com.example.testviewpager;

import java.util.List;

import net.tsz.afinal.FinalBitmap;
import android.content.Context;
import android.support.v4.view.PagerAdapter;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;

public class MyAdapter extends PagerAdapter {

    private Context                _context;
    private List<ObjectEntity> _dataSource;
    private List<View>             _views;
    
    private FinalBitmap         _finalMab;
    
    public MyAdapter(Context context,List<ObjectEntity> ds,List<View> views) {

        _context = context;
        _dataSource = ds;
        _views = views;
    }

    @Override
    public int getCount() {
        // TODO Auto-generated method stub
        return _views.size();
    }

    @Override
    public void destroyItem(ViewGroup container, int position, Object object) {
        // TODO Auto-generated method stub
        
        container.removeView(_views.get(position));
    }

    @Override
    public Object instantiateItem(ViewGroup container, int position) {
        // TODO Auto-generated method stub
        
        View itemView = _views.get(position);
        ObjectEntity objectEntity = _dataSource.get(position);
        
        ImageView imageView = (ImageView) itemView.findViewById(R.id.imageView1);
        
        _finalMab = FinalBitmap.create(_context);//初始化FinalBitmap模块
        _finalMab.configLoadingImage(objectEntity.resId);
        _finalMab.display(imageView,objectEntity.imgUrl);
        
        container.addView(itemView);
        
        return itemView;
    }

    @Override
    public boolean isViewFromObject(View arg0, Object arg1) {
        // TODO Auto-generated method stub
        return arg0 == arg1;
    }

}

下面是布局文件activity_main.xml

<RelativeLayout 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: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=".MainActivity" >
    
    <android.support.v4.view.ViewPager
        android:id="@+id/mainViewPager"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent" >

    </android.support.v4.view.ViewPager>
    
</RelativeLayout>

作为子项加载到ViewPager里面的item.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" >

    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="fill_parent" >

        <ImageView
            android:id="@+id/imageView1"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:scaleType="fitXY" />

    </LinearLayout>

</LinearLayout>