智慧北京开发第三天（下）
头条新闻标题设置 & 使用ViewpagerIndicator实现头条新闻位置指示器
tab_detail_pager.xml
TabDetailPager.java
package com.xbmu.wisdombj.base;
import android.app.Activity;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
import com.google.gson.Gson;
import com.lidroid.xutils.BitmapUtils;
import com.lidroid.xutils.HttpUtils;
import com.lidroid.xutils.ViewUtils;
import com.lidroid.xutils.exception.HttpException;
import com.lidroid.xutils.http.ResponseInfo;
import com.lidroid.xutils.http.callback.RequestCallBack;
import com.lidroid.xutils.http.client.HttpRequest.HttpMethod;
import com.lidroid.xutils.view.annotation.ViewInject;
import com.viewpagerindicator.CirclePageIndicator;
import com.xbmu.wisdombj.R;
import com.xbmu.wisdombj.bean.NewsData.NewsTabData;
import com.xbmu.wisdombj.bean.TabData;
import com.xbmu.wisdombj.bean.TabData.TopNewsData;
import com.xbmu.wisdombj.global.GlobalVariables;
import java.util.ArrayList;
/**
* 页签详情页，表示每一个页签的对象
* Created by Administrator on 2016/2/7 0007.
*/
public class TabDetailPager extends BaseNewsDetailPager implements ViewPager.OnPageChangeListener{
private NewsTabData mTabData;//新闻的 11个子标签标题
@ViewInject(R.id.vp_tab_top)
private ViewPager vpTabPagerTop;
@ViewInject(R.id.lv_tab_list)
private ListView lvTabList;
@ViewInject(R.id.tv_news_title)
private TextView tvNewsTitle;
@ViewInject(R.id.indicator)
private CirclePageIndicator indicator;
private String mUrl;
private TabData tabData;//页签数据
private ArrayList topNewsDatas;//头条新闻数据集合
private TopNewsData topNewsData;//头条新闻数据
public TabDetailPager(Activity mActivity, NewsTabData newsTabDatas) {
super(mActivity);
this.mTabData = newsTabDatas;
mUrl = GlobalVariables.BASE_URL + newsTabDatas.url;
}
@Override
public View initView() {
View view = View.inflate(mActivity, R.layout.tab_detail_pager,null);
ViewUtils.inject(this,view);
return view;
}
@Override
public void initData() {
super.initData();
getDataFromServer();
}
/**
* 从服务器获取数据
*/
public void getDataFromServer() {
HttpUtils httpUtils = new HttpUtils();
httpUtils.send(HttpMethod.GET, mUrl, new RequestCallBack() {
@Override
public void onSuccess(ResponseInfo responseInfo) {
String result = responseInfo.result;
System.out.print("从网络获取的子页签详情数据:" + result);
//解析数据
paserData(result);
}
@Override
public void onFailure(HttpException e, String msg) {
Toast.makeText(mActivity, msg, Toast.LENGTH_SHORT).show();
e.printStackTrace();
}
});
}
/**
* 解析数据
* @param result
*/
private void paserData(String result) {
Gson gson = new Gson();
tabData = gson.fromJson(result, TabData.class);
topNewsDatas = tabData.data.topnews;
if(topNewsDatas!=null){
vpTabPagerTop.setAdapter(new NewsTopAdapter());
indicator.setOnPageChangeListener(this);
indicator.setSnap(true);//支持快照显示
indicator.onPageSelected(0);//让指示器重新定位到第一个点
indicator.setViewPager(vpTabPagerTop);
tvNewsTitle.setText(topNewsDatas.get(0).title);
}
}
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
}
@Override
public void onPageSelected(int position) {
tvNewsTitle.setText(topNewsDatas.get(position).title);
}
@Override
public void onPageScrollStateChanged(int state) {
}
/**
* 新闻头条适配器
*/
private class NewsTopAdapter extends PagerAdapter{
private BitmapUtils bitmapUtils;
public NewsTopAdapter() {
bitmapUtils = new BitmapUtils(mActivity);
bitmapUtils.configDefaultLoadingImage(R.drawable.topnews_item_default);//设置默认图片
}
@Override
public int getCount() {
return topNewsDatas.size();
}
@Override
public boolean isViewFromObject(View view, Object object) {
return view == object;
}
@Override
public Object instantiateItem(ViewGroup container, int position) {
ImageView imageView = new ImageView(mActivity);
imageView.setScaleType(ImageView.ScaleType.FIT_XY);//基于控件大小填充图片
topNewsData = topNewsDatas.get(position);
bitmapUtils.display(imageView, topNewsData.topimage);//传递imageView对象和图片地址
container.addView(imageView);
System.out.println("topNews：" + position);
return imageView;
}
@Override
public void destroyItem(ViewGroup container, int position, Object object) {
container.removeView((View)object);
}
}
}
运行效果：
新闻列表展示 & item布局编写
new_list_item.xml
tab_detail_pager.xml
TabDetailPager.java
package com.xbmu.wisdombj.base;
import android.app.Activity;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
import com.google.gson.Gson;
import com.lidroid.xutils.BitmapUtils;
import com.lidroid.xutils.HttpUtils;
import com.lidroid.xutils.ViewUtils;
import com.lidroid.xutils.exception.HttpException;
import com.lidroid.xutils.http.ResponseInfo;
import com.lidroid.xutils.http.callback.RequestCallBack;
import com.lidroid.xutils.http.client.HttpRequest.HttpMethod;
import com.lidroid.xutils.view.annotation.ViewInject;
import com.viewpagerindicator.CirclePageIndicator;
import com.xbmu.wisdombj.R;
import com.xbmu.wisdombj.bean.NewsData.NewsTabData;
import com.xbmu.wisdombj.bean.TabData;
import com.xbmu.wisdombj.bean.TabData.TabNewsData;
import com.xbmu.wisdombj.bean.TabData.TopNewsData;
import com.xbmu.wisdombj.global.GlobalVariables;
import java.util.ArrayList;
/**
* 页签详情页，表示每一个页签的对象
* Created by Administrator on 2016/2/7 0007.
*/
public class TabDetailPager extends BaseNewsDetailPager implements ViewPager.OnPageChangeListener {
private NewsTabData mTabData;//新闻的 11个子标签标题
@ViewInject(R.id.vp_tab_top)
private ViewPager vpTabPagerTop;
@ViewInject(R.id.lv_tab_list)
private ListView lvTabList;
@ViewInject(R.id.tv_news_title)
private TextView tvNewsTitle;
@ViewInject(R.id.indicator)
private CirclePageIndicator indicator;
private String mUrl;
private TabData tabData;//页签数据
private ArrayList topNewsDatas;//头条新闻数据集合
private TopNewsData topNewsData;//头条新闻数据
private ArrayList tabNewsDatas;//新闻列表对象
private View newTopView;//新闻顶部广告条
public TabDetailPager(Activity mActivity, NewsTabData newsTabDatas) {
super(mActivity);
this.mTabData = newsTabDatas;
mUrl = GlobalVariables.BASE_URL + newsTabDatas.url;
}
@Override
public View initView() {
View view = View.inflate(mActivity, R.layout.tab_detail_pager, null);
newTopView = View.inflate(mActivity, R.layout.new_top_ads, null);
ViewUtils.inject(this, view);
ViewUtils.inject(this, newTopView);
return view;
}
@Override
public void initData() {
super.initData();
getDataFromServer();
}
/**
* 从服务器获取数据
*/
public void getDataFromServer() {
HttpUtils httpUtils = new HttpUtils();
httpUtils.send(HttpMethod.GET, mUrl, new RequestCallBack() {
@Override
public void onSuccess(ResponseInfo responseInfo) {
String result = responseInfo.result;
System.out.print("从网络获取的子页签详情数据:" + result);
//解析数据
paserData(result);
}
@Override
public void onFailure(HttpException e, String msg) {
Toast.makeText(mActivity, msg, Toast.LENGTH_SHORT).show();
e.printStackTrace();
}
});
}
/**
* 解析数据
*
* @param result
*/
private void paserData(String result) {
Gson gson = new Gson();
tabData = gson.fromJson(result, TabData.class);
topNewsDatas = tabData.data.topnews;
if (topNewsDatas != null) {
vpTabPagerTop.setAdapter(new NewsTopAdapter());
indicator.setOnPageChangeListener(this);
indicator.setSnap(true);//支持快照显示
indicator.onPageSelected(0);//让指示器重新定位到第一个点
indicator.setViewPager(vpTabPagerTop);
tvNewsTitle.setText(topNewsDatas.get(0).title);
}
tabNewsDatas = tabData.data.news;
if (tabNewsDatas != null) {
lvTabList.addHeaderView(newTopView);
lvTabList.setAdapter(new NewsItemAdapter());
}
}
private class NewsItemAdapter extends BaseAdapter {
private BitmapUtils bitmapUtils;
public NewsItemAdapter() {
bitmapUtils = new BitmapUtils(mActivity);
}
@Override
public int getCount() {
return tabNewsDatas.size();
}
@Override
public TabNewsData getItem(int position) {
return tabNewsDatas.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder viewHolder;
if(convertView==null){
convertView = View.inflate(mActivity,R.layout.new_list_item,null);
viewHolder = new ViewHolder();
viewHolder.ivNewIcon = (ImageView) convertView.findViewById(R.id.iv_pic);
viewHolder.tvNewTitle = (TextView) convertView.findViewById(R.id.tv_title);
viewHolder.tvNewDate = (TextView) convertView.findViewById(R.id.tv_date);
convertView.setTag(viewHolder);
}else{
viewHolder = (ViewHolder) convertView.getTag();
}
viewHolder.tvNewTitle.setText(getItem(position).title);
viewHolder.tvNewDate.setText(getItem(position).pubdate);
bitmapUtils.display(viewHolder.ivNewIcon,getItem(position).listimage);
return convertView;
}
}
static class ViewHolder{
ImageView ivNewIcon;
TextView tvNewTitle;
TextView tvNewDate;
}
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
}
@Override
public void onPageSelected(int position) {
tvNewsTitle.setText(topNewsDatas.get(position).title);
}
@Override
public void onPageScrollStateChanged(int state) {
}
/**
* 新闻头条适配器
*/
private class NewsTopAdapter extends PagerAdapter {
private BitmapUtils bitmapUtils;
public NewsTopAdapter() {
bitmapUtils = new BitmapUtils(mActivity);
bitmapUtils.configDefaultLoadingImage(R.drawable.topnews_item_default);//设置默认图片
}
@Override
public int getCount() {
return topNewsDatas.size();
}
@Override
public boolean isViewFromObject(View view, Object object) {
return view == object;
}
@Override
public Object instantiateItem(ViewGroup container, int position) {
ImageView imageView = new ImageView(mActivity);
imageView.setScaleType(ImageView.ScaleType.FIT_XY);//基于控件大小填充图片
topNewsData = topNewsDatas.get(position);
bitmapUtils.display(imageView, topNewsData.topimage);//传递imageView对象和图片地址
container.addView(imageView);
System.out.println("topNews：" + position);
return imageView;
}
@Override
public void destroyItem(ViewGroup container, int position, Object object) {
container.removeView((View) object);
}
}
}
全部代码：
http://download.csdn.net/detail/btt2013/9429457
http://download.csdn.net/detail/btt2013/9429457