Android 利用ViewPager+GridView实现首页导航栏布局分页效果

<?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"  android:background="#CDCDCD" >  <RelativeLayout    android:layout_width="match_parent"    android:layout_height="200dp"    android:background="#fff" >    <android.support.v4.view.ViewPager      android:id="@+id/viewpager"      android:layout_width="match_parent"      android:layout_height="wrap_content" />    <LinearLayout      android:id="@+id/points"      android:layout_width="match_parent"      android:layout_height="wrap_content"      android:layout_alignParentBottom="true"      android:layout_marginBottom="10dp"      android:gravity="center"      android:orientation="horizontal" />  </RelativeLayout></RelativeLayout>

<?xml version="1.0" encoding="utf-8"?><GridView xmlns:android="http://schemas.android.com/apk/res/android"  android:id="@+id/gridView"  android:layout_width="match_parent"  android:layout_height="wrap_content"  android:numColumns="4"></GridView>

package com.item.jiejie.adapter;import java.util.List;import com.item.jiejie.ProdctBean;import com.item.jiejie.R;import android.content.Context;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.ImageView;import android.widget.TextView;import android.widget.Toast;/** * GridView加载数据的适配器 * @author Administrator * */public class MyGridViewAdpter extends BaseAdapter{    private Context context;  private List<ProdctBean> lists;//数据源  private int mIndex; // 页数下标，标示第几页，从0开始  private int mPargerSize;// 每页显示的最大的数量        public MyGridViewAdpter(Context context, List<ProdctBean> lists,      int mIndex, int mPargerSize) {    this.context = context;    this.lists = lists;    this.mIndex = mIndex;    this.mPargerSize = mPargerSize;  }  /**   * 先判断数据及的大小是否显示满本页lists.size() > (mIndex + 1)*mPagerSize   * 如果满足，则此页就显示最大数量lists的个数   * 如果不够显示每页的最大数量，那么剩下几个就显示几个   */  @Override  public int getCount() {    // TODO Auto-generated method stub    return lists.size() > (mIndex + 1) * mPargerSize ?         mPargerSize : (lists.size() - mIndex*mPargerSize);  }  @Override  public ProdctBean getItem(int arg0) {    // TODO Auto-generated method stub    return lists.get(arg0 + mIndex * mPargerSize);  }  @Override  public long getItemId(int arg0) {    // TODO Auto-generated method stub    return arg0 + mIndex * mPargerSize;  }  @Override  public View getView(int position, View convertView, ViewGroup parent) {    // TODO Auto-generated method stub    ViewHolder holder = null;    if(convertView == null){      holder = new ViewHolder();      convertView = View.inflate(context, R.layout.item_view, null);      holder.tv_name = (TextView)convertView.findViewById(R.id.item_name);      holder.iv_nul = (ImageView)convertView.findViewById(R.id.item_image);      convertView.setTag(holder);    }else {      holder = (ViewHolder)convertView.getTag();    }    //重新确定position因为拿到的总是数据源，数据源是分页加载到每页的GridView上的    final int pos = position + mIndex * mPargerSize;//假设mPageSiez    //假设mPagerSize=8，假如点击的是第二页（即mIndex=1）上的第二个位置item(position=1),那么这个item的实际位置就是pos=9    holder.tv_name.setText(lists.get(pos).getName() + "");    holder.iv_nul.setImageResource(lists.get(pos).getUrl());    //添加item监听//    convertView.setOnClickListener(new View.OnClickListener() {//      //      @Override//      public void onClick(View arg0) {//        // TODO Auto-generated method stub//        Toast.makeText(context, "您点击了" + lists.get(pos).getName(), Toast.LENGTH_SHORT).show();//      }//    });    return convertView;  }  static class ViewHolder{    private TextView tv_name;    private ImageView iv_nul;  }}

package com.item.jiejie;import java.util.ArrayList;import java.util.List;import com.item.jiejie.adapter.MyGridViewAdpter;import com.item.jiejie.adapter.MyViewPagerAdapter;import android.app.Activity;import android.os.Bundle;import android.support.v4.view.ViewPager;import android.view.View;import android.widget.AdapterView;import android.widget.AdapterView.OnItemClickListener;import android.widget.GridView;import android.widget.ImageView;import android.widget.LinearLayout;import android.widget.Toast;/** * 实现仿美团首页导航栏布局分页效果  * @author Administrator * */public class MyActivity extends Activity {  private ViewPager viewPager;  private LinearLayout group;//圆点指示器  private ImageView[] ivPoints;//小圆点图片的集合  private int totalPage; //总的页数  private int mPageSize = 8; //每页显示的最大的数量  private List<ProdctBean> listDatas;//总的数据源  private List<View> viewPagerList;//GridView作为一个View对象添加到ViewPager集合中  //private int currentPage;//当前页    private String[] proName = {"名称0","名称1","名称2","名称3","名称4","名称5",      "名称6","名称7","名称8","名称9","名称10","名称11","名称12","名称13",      "名称14","名称15","名称16","名称17","名称18","名称19"};  @Override  protected void onCreate(Bundle savedInstanceState) {    // TODO Auto-generated method stub    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_my);    //初始化控件    initView();    //添加业务逻辑    initData();  }    private void initView() {    // TODO Auto-generated method stub    viewPager = (ViewPager)findViewById(R.id.viewpager);    group = (LinearLayout)findViewById(R.id.points);    listDatas = new ArrayList<ProdctBean>();    for(int i =0 ; i < proName.length; i++){      listDatas.add(new ProdctBean(proName[i], R.drawable.iv_driving));    }  }  private void initData() {    // TODO Auto-generated method stub    //总的页数向上取整    totalPage = (int) Math.ceil(listDatas.size() * 1.0 / mPageSize);    viewPagerList = new ArrayList<View>();    for(int i = 0; i < totalPage; i++){      //每个页面都是inflate出一个新实例      final GridView gridView = (GridView)View.inflate(this, R.layout.item_gridview, null);      gridView.setAdapter(new MyGridViewAdpter(this, listDatas, i, mPageSize));      //添加item点击监听      gridView.setOnItemClickListener(new OnItemClickListener() {        @Override        public void onItemClick(AdapterView<?> arg0, View arg1,            int position, long arg3) {          // TODO Auto-generated method stub          Object obj = gridView.getItemAtPosition(position);          if(obj != null && obj instanceof ProdctBean){            System.out.println(obj);            Toast.makeText(MyActivity.this, ((ProdctBean)obj).getName(), Toast.LENGTH_SHORT).show();          }        }      });      //每一个GridView作为一个View对象添加到ViewPager集合中            viewPagerList.add(gridView);    }    //设置ViewPager适配器    viewPager.setAdapter(new MyViewPagerAdapter(viewPagerList));        //添加小圆点    ivPoints = new ImageView[totalPage];    for(int i = 0; i < totalPage; i++){      //循坏加入点点图片组      ivPoints[i] = new ImageView(this);      if(i==0){        ivPoints[i].setImageResource(R.drawable.page_focuese);      }else {        ivPoints[i].setImageResource(R.drawable.page_unfocused);      }      ivPoints[i].setPadding(8, 8, 8, 8);      group.addView(ivPoints[i]);    }    //设置ViewPager的滑动监听，主要是设置点点的背景颜色的改变    viewPager.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener(){      @Override      public void onPageSelected(int position) {        // TODO Auto-generated method stub        //currentPage = position;        for(int i=0 ; i < totalPage; i++){          if(i == position){            ivPoints[i].setImageResource(R.drawable.page_focuese);          }else {            ivPoints[i].setImageResource(R.drawable.page_unfocused);          }        }      }    });  }}

package com.item.jiejie.adapter;import java.util.List;import android.support.v4.view.PagerAdapter;import android.view.View;import android.view.ViewGroup;/** * ViewPage的适配器 * @author Administrator * */public class MyViewPagerAdapter extends PagerAdapter{    private List<View> viewList;//View就二十GridView      public MyViewPagerAdapter(List<View> viewList) {    this.viewList = viewList;  }  @Override  public int getCount() {    // TODO Auto-generated method stub    return viewList!=null ? viewList.size() : 0;  }  @Override  public boolean isViewFromObject(View arg0, Object arg1) {    // TODO Auto-generated method stub    return arg0 == arg1;  }  /**   * 将当前的View添加到ViewGroup容器中   * 这个方法，return一个对象，这个对象表明了PagerAdapter适配器选择哪个对象放在当前的ViewPage上   */  @Override  public Object instantiateItem(ViewGroup container, int position) {    // TODO Auto-generated method stub    container.addView(viewList.get(position));    return viewList.get(position);  }    @Override  public void destroyItem(ViewGroup container, int position, Object object) {    // TODO Auto-generated method stub     container.removeView((View) object);  }}