新闻类APP模板详解（android版）
1.概述
本文将介绍一个android版新闻类app模板，是本人整合了网上各类资源后整理出来的，希望对大家有所帮助！
iOS版新闻类app模板详见：
新闻类APP模板详解（iOS版）
本模板app截图如下：
2.具体实现
该模板主体是一个FragmentActivity，布局文件activity_main.xml如下：
其中：
a.
b. 定义了左右滑动、展现新闻类型（头条、咨询、招聘等）的控件；
c. 定义了展现各类新闻列表的viewpager，同样响应左右滑动操作，包含顶部滚动广告栏。
对应的MainActivity文件如下：
package com.latu.qingcheng123.activity;
import java.util.ArrayList;
import com.jeremyfeinstein.slidingmenu.lib.SlidingMenu;
import com.latu.qingcheng123.R;
import com.latu.qingcheng123.adapter.CategoryFragmentPagerAdapter;
import com.latu.qingcheng123.fragment.CategoryFragment;
import com.latu.qingcheng123.util.BaseTools;
import com.latu.qingcheng123.vo.CategoryItem;
import com.latu.qingcheng123.widget.ColumnHorizontalScrollView;
import com.latu.qingcheng123.widget.DrawerView;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.view.Gravity;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup.LayoutParams;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends FragmentActivity {
private ColumnHorizontalScrollView mColumnHorizontalScrollView;
private LinearLayout mRadioGroup_content;
private RelativeLayout rl_column;
private ViewPager mViewPager;
/** 左阴影部分 */
public ImageView shade_left;
/** 右阴影部分 */
public ImageView shade_right;
/** head 头部 的左侧菜单 按钮 */
private ImageView top_head;
protected SlidingMenu side_drawer;
/** 屏幕宽度 */
private int mScreenWidth = 0;
/** Item宽度 */
private int mItemWidth = 0;
private long mExitTime;
/** 当前选中的栏目 */
private int columnSelectIndex = 0;
private ArrayList m_lCategories = new ArrayList();
private ArrayList m_fragments = new ArrayList();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initView();
initSlidingMenu();
}
/**
* 初始化layout控件
*/
private void initView() {
mScreenWidth = BaseTools.getWindowsWidth(this);
mItemWidth = mScreenWidth / 7;// 一个Item宽度为屏幕的1/7
mColumnHorizontalScrollView = (ColumnHorizontalScrollView) findViewById(R.id.mColumnHorizontalScrollView);
mRadioGroup_content = (LinearLayout) findViewById(R.id.mRadioGroup_content);
rl_column = (RelativeLayout) findViewById(R.id.rl_column);
mViewPager = (ViewPager) findViewById(R.id.mViewPager);
shade_left = (ImageView) findViewById(R.id.shade_left);
shade_right = (ImageView) findViewById(R.id.shade_right);
top_head = (ImageView) findViewById(R.id.top_head);
top_head.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if (side_drawer.isMenuShowing()) {
side_drawer.showContent();
} else {
side_drawer.showMenu();
}
}
});
setChangelView();
}
/**
* 当栏目项发生变化时候调用
* */
private void setChangelView() {
initColumnData();
initTabColumn();
initFragment();
}
/** 获取Column栏目 数据 */
private void initColumnData() {
CategoryItem item1 = new CategoryItem();
item1.categoryID = "0";
item1.categoryName = "头条";
m_lCategories.add(item1);
CategoryItem item2 = new CategoryItem();
item2.categoryID = "1";
item2.categoryName = "资讯";
m_lCategories.add(item2);
CategoryItem item3 = new CategoryItem();
item3.categoryID = "2";
item3.categoryName = "招聘";
m_lCategories.add(item3);
CategoryItem item4 = new CategoryItem();
item4.categoryID = "3";
item4.categoryName = "二手";
m_lCategories.add(item4);
CategoryItem item5 = new CategoryItem();
item5.categoryID = "4";
item5.categoryName = "房产";
m_lCategories.add(item5);
CategoryItem item6 = new CategoryItem();
item6.categoryID = "5";
item6.categoryName = "生活";
m_lCategories.add(item6);
CategoryItem item7 = new CategoryItem();
item7.categoryID = "6";
item7.categoryName = "婚恋";
m_lCategories.add(item7);
CategoryItem item8 = new CategoryItem();
item8.categoryID = "7";
item8.categoryName = "轻松";
m_lCategories.add(item8);
}
/**
* 初始化Column栏目项
* */
private void initTabColumn() {
mRadioGroup_content.removeAllViews();
int count = m_lCategories.size();
mColumnHorizontalScrollView.setParam(this, mScreenWidth,
mRadioGroup_content, shade_left, shade_right, rl_column);
for (int i = 0; i < count; i++) {
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
mItemWidth, LayoutParams.WRAP_CONTENT);
params.leftMargin = 5;
params.rightMargin = 5;
// TextView localTextView = (TextView)
// mInflater.inflate(R.layout.column_radio_item, null);
TextView columnTextView = new TextView(this);
columnTextView.setTextAppearance(this,
R.style.top_category_scroll_view_item_text);
// localTextView.setBackground(getResources().getDrawable(R.drawable.top_category_scroll_text_view_bg));
columnTextView.setBackgroundResource(R.drawable.radio_buttong_bg);
columnTextView.setGravity(Gravity.CENTER);
columnTextView.setPadding(5, 5, 5, 5);
columnTextView.setId(i);
columnTextView.setText(m_lCategories.get(i).categoryName);
columnTextView.setTextColor(getResources().getColorStateList(
R.color.top_category_scroll_text_color_day));
if (columnSelectIndex == i) {
columnTextView.setSelected(true);
}
columnTextView.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
for (int i = 0; i < mRadioGroup_content.getChildCount(); i++) {
View localView = mRadioGroup_content.getChildAt(i);
if (localView != v)
localView.setSelected(false);
else {
localView.setSelected(true);
mViewPager.setCurrentItem(i);
}
}
Toast.makeText(getApplicationContext(),
m_lCategories.get(v.getId()).categoryName,
Toast.LENGTH_SHORT).show();
}
});
mRadioGroup_content.addView(columnTextView, i, params);
}
}
/**
* 初始化Fragment
* */
private void initFragment() {
int count = m_lCategories.size();
for (int i = 0; i < count; i++) {
Bundle data = new Bundle();
data.putString("name", m_lCategories.get(i).categoryName);
CategoryFragment fragment = new CategoryFragment();
fragment.setArguments(data);
m_fragments.add(fragment);
}
CategoryFragmentPagerAdapter mAdapetr = new CategoryFragmentPagerAdapter(
getSupportFragmentManager(), m_fragments);
// mViewPager.setOffscreenPageLimit(0);
mViewPager.setAdapter(mAdapetr);
mViewPager.setOnPageChangeListener(pageListener);
}
/**
* ViewPager切换监听方法
* */
public OnPageChangeListener pageListener = new OnPageChangeListener() {
@Override
public void onPageScrollStateChanged(int arg0) {
}
@Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
}
@Override
public void onPageSelected(int position) {
mViewPager.setCurrentItem(position);
selectTab(position);
}
};
/**
* 选择的Column里面的Tab
* */
private void selectTab(int tab_postion) {
columnSelectIndex = tab_postion;
for (int i = 0; i < mRadioGroup_content.getChildCount(); i++) {
View checkView = mRadioGroup_content.getChildAt(tab_postion);
int k = checkView.getMeasuredWidth();
int l = checkView.getLeft();
int i2 = l + k / 2 - mScreenWidth / 2;
// rg_nav_content.getParent()).smoothScrollTo(i2, 0);
mColumnHorizontalScrollView.smoothScrollTo(i2, 0);
// mColumnHorizontalScrollView.smoothScrollTo((position - 2) *
// mItemWidth , 0);
}
// 判断是否选中
for (int j = 0; j < mRadioGroup_content.getChildCount(); j++) {
View checkView = mRadioGroup_content.getChildAt(j);
boolean ischeck;
if (j == tab_postion) {
ischeck = true;
} else {
ischeck = false;
}
checkView.setSelected(ischeck);
}
}
protected void initSlidingMenu() {
side_drawer = new DrawerView(this).initSlidingMenu();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK) {
if (side_drawer.isMenuShowing()) {
side_drawer.showContent();
} else {
if ((System.currentTimeMillis() - mExitTime) > 2000) {
Toast.makeText(this,
getResources().getString(R.string.quit_app),
Toast.LENGTH_SHORT).show();
mExitTime = System.currentTimeMillis();
} else {
finish();
}
}
return true;
}
// 拦截MENU按钮点击事件，让他无任何操作
if (keyCode == KeyEvent.KEYCODE_MENU) {
return true;
}
return super.onKeyDown(keyCode, event);
}
}
其中，
a. 显示新闻标题的是ColumnHorizontalScrollView控件（横向滚动控件），initColumnData()和initTabColumn()方法完成 了对其的初始化。
b. initFragment()方法初始化了每个标题对应的新闻列表页面，是一种Fragment，叫CategoryFragment。每个CategoryFragment对应一类新闻页面，其中实现了广告栏、新闻列表（上拉和下拉都可以刷新）功能。
c. side_drawer为左侧抽屉菜单，是一个SlidingMenu，需要引入SlidingMenu-master资源，依赖library_123资源工程。关于SlidingMenu-master，可查阅相关资料，本文不做过多介绍。
DrawerView文件定义了左侧抽屉菜单，内容如下：
package com.latu.qingcheng123.widget;
import android.app.Activity;
import android.view.View;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.widget.Toast;
import com.jeremyfeinstein.slidingmenu.lib.SlidingMenu;
import com.latu.qingcheng123.R;
/**
* 自定义SlidingMenu 测拉菜单类
* */
public class DrawerView {
private final Activity m_activity;
private SlidingMenu localSlidingMenu;
private ImageView ivPortrait;
private TextView tvName;
private RelativeLayout rlMenu1, rlMenu2, rlMenu3;
public DrawerView(Activity activity) {
this.m_activity = activity;
}
public SlidingMenu initSlidingMenu() {
localSlidingMenu = new SlidingMenu(m_activity);
localSlidingMenu.setMode(SlidingMenu.LEFT); // 设置左右滑菜单
localSlidingMenu.setTouchModeAbove(SlidingMenu.SLIDING_WINDOW); // 设置要使菜单滑动，触碰屏幕的范围
// localSlidingMenu.setTouchModeBehind(SlidingMenu.RIGHT);
localSlidingMenu.setShadowWidthRes(R.dimen.shadow_width); // 设置阴影图片的宽度
localSlidingMenu.setShadowDrawable(R.drawable.shadow); // 设置阴影图片
localSlidingMenu.setBehindOffsetRes(R.dimen.slidingmenu_offset); // SlidingMenu划出时主页面显示的剩余宽度
localSlidingMenu.setFadeDegree(0.35F); // SlidingMenu滑动时的渐变程度
localSlidingMenu.attachToActivity(m_activity, SlidingMenu.RIGHT); // 使SlidingMenu附加在Activity右边
// localSlidingMenu.setBehindWidthRes(R.dimen.left_drawer_avatar_size);
// //设置SlidingMenu菜单的宽度
localSlidingMenu.setMenu(R.layout.left_drawer_fragment); // 设置menu的布局文件
// localSlidingMenu.toggle(); //动态判断自动关闭或开启SlidingMenu
localSlidingMenu
.setOnOpenedListener(new SlidingMenu.OnOpenedListener() {
public void onOpened() {
}
});
initView();
return localSlidingMenu;
}
private void initView() {
ivPortrait = (ImageView) localSlidingMenu
.findViewById(R.id.iv_portrait);
ivPortrait.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(m_activity, "click on portrait!",
Toast.LENGTH_SHORT).show();
}
});
tvName = (TextView) localSlidingMenu.findViewById(R.id.tv_name);
tvName.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(m_activity, "click on name!", Toast.LENGTH_SHORT)
.show();
}
});
rlMenu1 = (RelativeLayout) localSlidingMenu
.findViewById(R.id.ll_menu_1);
rlMenu1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(m_activity, "click on menu1!",
Toast.LENGTH_SHORT).show();
// // 跳转页面用下方方式
// m_activity.startActivity(new Intent(m_activity,
// AboutActivity.class));
}
});
rlMenu2 = (RelativeLayout) localSlidingMenu
.findViewById(R.id.ll_menu_2);
rlMenu2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(m_activity, "click on menu2!",
Toast.LENGTH_SHORT).show();
// // 跳转页面用下方方式
// m_activity.startActivity(new Intent(m_activity,
// AboutActivity.class));
}
});
rlMenu3 = (RelativeLayout) localSlidingMenu
.findViewById(R.id.ll_menu_3);
rlMenu3.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(m_activity, "click on menu3!",
Toast.LENGTH_SHORT).show();
// // 跳转页面用下方方式
// m_activity.startActivity(new Intent(m_activity,
// AboutActivity.class));
}
});
}
}
如上所述，CategoryFragment实现了获取新闻、显示列表等一系列功能，代码如下：
package com.latu.qingcheng123.fragment;
import java.util.ArrayList;
import java.util.Date;
import java.util.LinkedList;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
import com.latu.qingcheng123.R;
import com.latu.qingcheng123.adapter.NewsAdapter;
import com.latu.qingcheng123.util.GlobalParam;
import com.latu.qingcheng123.vo.AdsItem;
import com.latu.qingcheng123.vo.NewsItem;
import com.latu.qingcheng123.widget.xlistview.XListView;
import com.latu.qingcheng123.widget.xlistview.XListView.IXListViewListener;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class CategoryFragment extends Fragment implements IXListViewListener {
private Activity m_activity;
private String m_categoryName;
private XListView mListView;
private NewsAdapter mAdapter;
private LinkedList newsList = new LinkedList();
private ArrayList adsList = new ArrayList();
private Handler mHandler;
private ScheduledExecutorService scheduledExecutorService; // 控制广告滚动
private int indexNew = 20;
private int indexOld = 20;
private static final String[] URLS = {
"https://img-my.csdn.net/uploads/201403/03/1393854094_4652.jpg",
"https://img-my.csdn.net/uploads/201403/03/1393854084_6138.jpg",
"https://img-my.csdn.net/uploads/201403/03/1393854084_1323.jpg",
"https://img-my.csdn.net/uploads/201403/03/1393854084_8439.jpg",
"https://img-my.csdn.net/uploads/201403/03/1393854083_6511.jpg",
"https://img-my.csdn.net/uploads/201403/03/1393854083_2323.jpg" };
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Bundle args = getArguments();
m_categoryName = args != null ? args.getString("name") : "";
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View viewContent = LayoutInflater.from(m_activity).inflate(
R.layout.fragment_category, null);
mListView = (XListView) viewContent.findViewById(R.id.xListView);
mListView.setPullLoadEnable(true);
mAdapter = new NewsAdapter(m_activity, newsList, adsList);
mListView.setAdapter(mAdapter);
// mListView.setPullLoadEnable(false);
// mListView.setPullRefreshEnable(false);
mListView.setXListViewListener(this);
mHandler = new Handler();
getAds();
getNews();
mAdapter.notifyDataSetChanged();
return viewContent;
}
@Override
public void onStart() {
// if (scheduledExecutorService != null)
// {
// scheduledExecutorService.shutdown();
// }
scheduledExecutorService = Executors.newSingleThreadScheduledExecutor();
scheduledExecutorService.scheduleAtFixedRate(new ScrollTask(), 1, 2,
TimeUnit.SECONDS);
super.onStart();
}
@Override
public void onStop() {
if (scheduledExecutorService != null) {
scheduledExecutorService.shutdown();
}
super.onStop();
}
/**
* 广告滚动线程
*
*/
private class ScrollTask implements Runnable {
public void run() {
if (mAdapter != null) {
synchronized (mAdapter) {
mAdapter.scrollAds();
}
}
}
}
private void getAds() {
adsList.clear();
AdsItem item1 = new AdsItem();
item1.adsId = "1";
item1.title = "广告1";
item1.imgURL = "https://img-my.csdn.net/uploads/201404/13/1397393290_5765.jpeg";
adsList.add(item1);
AdsItem item2 = new AdsItem();
item2.adsId = "2";
item2.title = "广告内容2";
item2.imgURL = "https://img-my.csdn.net/uploads/201403/03/1393854084_8439.jpg";
adsList.add(item2);
AdsItem item3 = new AdsItem();
item3.adsId = "3";
item3.title = "广告推广信息3";
item3.imgURL = "https://img-my.csdn.net/uploads/201403/03/1393854083_2323.jpg";
adsList.add(item3);
}
private void getNews() {
for (int i = 0; i != 5; ++i) {
NewsItem item = new NewsItem();
item.newsId = "" + indexOld;
item.leftImgURL = URLS[i % 6];
item.title = "新闻标题" + indexOld;
item.source = "新浪新闻";
item.commentNum = indexOld;
newsList.add(item);
indexOld++;
}
}
private void getLatestNews() {
for (int i = 0; i != 5 && indexNew > 0; ++i) {
indexNew--;
NewsItem item = new NewsItem();
item.newsId = "" + indexNew;
item.leftImgURL = URLS[i % 6];
item.title = "新闻标题" + indexNew;
item.source = "新浪新闻";
item.commentNum = indexNew;
newsList.addFirst(item);
}
}
private void onFinishLoad() {
mListView.stopRefresh();
mListView.stopLoadMore();
mListView.setRefreshTime(GlobalParam.g_dateFormat.format(new Date(
System.currentTimeMillis())));
}
@Override
public void onRefresh() {
mHandler.postDelayed(new Runnable() {
@Override
public void run() {
getLatestNews();
mAdapter.notifyDataSetChanged();
onFinishLoad();
}
}, 1000);
}
@Override
public void onLoadMore() {
mHandler.postDelayed(new Runnable() {
@Override
public void run() {
getNews();
mAdapter.notifyDataSetChanged();
onFinishLoad();
}
}, 1000);
}
/** 此方法意思为fragment是否可见 ,可见时候加载数据 */
@Override
public void setUserVisibleHint(boolean isVisibleToUser) {
if (isVisibleToUser) {
} else {
// fragment不可见时不执行操作
}
super.setUserVisibleHint(isVisibleToUser);
}
@Override
public void onAttach(Activity activity) {
this.m_activity = activity;
super.onAttach(activity);
}
}
其中，
a. 展现新闻列表的是XListView，是一个响应下拉和上拉刷新的自定义ListView，需要实现IXListViewListener接口。对应的布局文件fragment_category.xml比较简单，就一个listview。
b. 组织和显示新闻列表的adapter（数据适配器）是一个NewsAdapter对象mAdapter。NewsAdapter自定义了广告和新闻的组织、显示方式。使用时，需要根据您的数据要求做相应的调整。代码如下：
package com.latu.qingcheng123.adapter;
import java.io.File;
import java.util.ArrayList;
import java.util.List;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.ImageRequest;
import com.latu.qingcheng123.R;
import com.latu.qingcheng123.util.BaseTools;
import com.latu.qingcheng123.util.GlobalParam;
import com.latu.qingcheng123.util.ProfessionalTools;
import com.latu.qingcheng123.vo.AdsItem;
import com.latu.qingcheng123.vo.NewsItem;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;
import android.os.Handler;
import android.os.Parcelable;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.Toast;
import android.widget.ImageView.ScaleType;
import android.widget.LinearLayout;
import android.widget.TextView;
public class NewsAdapter extends BaseAdapter {
private Context mContext;
// 新闻列表
private List newsList;
// 广告列表
private List adsList;
private NewsViewHolder mHolder;
private LayoutInflater mInflater;
private ViewPager vpAds;
private AdsAdapter adsAdapter;
private TextView tvAdsTitle;
private LinearLayout llAdsPage;
private List ads_imageViews; // 滑动的图片集合
private List ads_dots; // 图片标题正文的那些点
private int ads_currentItem = 0; // 当前图片的索引号
public NewsAdapter(Context context, List newsList,
List adsList) {
super();
this.mContext = context;
this.newsList = newsList;
this.adsList = adsList;
mInflater = LayoutInflater.from(mContext);
ads_imageViews = new ArrayList();
ads_dots = new ArrayList();
adsAdapter = new AdsAdapter();
}
@Override
public int getCount() {
if (adsList != null && adsList.size() > 0) {
if (newsList != null && newsList.size() > 0) {
return newsList.size() + 1;
} else {
return 1;
}
} else {
if (newsList != null && newsList.size() > 0) {
return newsList.size();
} else {
return 0;
}
}
}
@Override
public Object getItem(int position) {
return null;
}
@Override
public long getItemId(int position) {
return 0;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
if (adsList != null && adsList.size() > 0) {
if (position == 0) {
convertView = mInflater.inflate(R.layout.ads_head, null);
tvAdsTitle = (TextView) convertView
.findViewById(R.id.tv_ads_title);
llAdsPage = (LinearLayout) convertView
.findViewById(R.id.ll_ads_page);
vpAds = (ViewPager) convertView.findViewById(R.id.vp_ads);
vpAds.setAdapter(adsAdapter);
vpAds.setOnPageChangeListener(new MyPageChangeListener());
// llAdsPage.removeAllViews();
// vpAds.removeAllViews();
ads_dots.clear();
ads_imageViews.clear();
for (int i = 0; i < adsList.size(); i++) {
final AdsItem item = adsList.get(i);
ImageView imageView = new ImageView(mContext);
setImageViewPic(imageView, item.imgURL);
imageView.setScaleType(ScaleType.CENTER_CROP);
imageView.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(mContext, item.title,
Toast.LENGTH_SHORT).show();
}
});
ads_imageViews.add(imageView);
View vDot = new View(mContext);
LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(
10, 10);
lp.setMargins(5, 0, 5, 0);
vDot.setLayoutParams(lp);
if (i == ads_currentItem) {
vDot.setBackgroundResource(R.drawable.dot_focused);
} else {
vDot.setBackgroundResource(R.drawable.dot_normal);
}
llAdsPage.addView(vDot);
ads_dots.add(vDot);
}
vpAds.setCurrentItem(ads_currentItem);
tvAdsTitle.setText(adsList.get(ads_currentItem).title);
return convertView;
} else {
convertView = mInflater.inflate(R.layout.news_list_item, null);
mHolder = new NewsViewHolder();
mHolder.llCommon = (LinearLayout) convertView
.findViewById(R.id.ll_common);
mHolder.ivLeftImg = (ImageView) convertView
.findViewById(R.id.iv_left_image);
mHolder.tvTitle = (TextView) convertView
.findViewById(R.id.tv_title);
mHolder.tvSource = (TextView) convertView
.findViewById(R.id.tv_source);
mHolder.tvCommentCount = (TextView) convertView
.findViewById(R.id.tv_comment_count);
if (newsList != null && newsList.size() > position - 1) {
NewsItem item = newsList.get(position - 1);
mHolder.tvTitle.setText(item.title);
mHolder.tvSource.setText(item.source);
mHolder.tvCommentCount.setText("" + item.commentNum);
setImageViewPic(mHolder.ivLeftImg, item.leftImgURL);
}
return convertView;
}
} else {
convertView = mInflater.inflate(R.layout.news_list_item, null);
mHolder = new NewsViewHolder();
mHolder.llCommon = (LinearLayout) convertView
.findViewById(R.id.ll_common);
mHolder.ivLeftImg = (ImageView) convertView
.findViewById(R.id.iv_left_image);
mHolder.tvTitle = (TextView) convertView
.findViewById(R.id.tv_title);
mHolder.tvSource = (TextView) convertView
.findViewById(R.id.tv_source);
mHolder.tvCommentCount = (TextView) convertView
.findViewById(R.id.tv_comment_count);
if (newsList != null && newsList.size() > position) {
NewsItem item = newsList.get(position);
mHolder.tvTitle.setText(item.title);
mHolder.tvSource.setText(item.source);
mHolder.tvCommentCount.setText("" + item.commentNum);
setImageViewPic(mHolder.ivLeftImg, item.leftImgURL);
}
return convertView;
}
}
// 切换当前显示的图片
private Handler handler = new Handler() {
public void handleMessage(android.os.Message msg) {
if (vpAds != null) {
vpAds.setCurrentItem(ads_currentItem);// 切换当前显示的图片
}
};
};
/**
* 广告滚动
*/
public void scrollAds() {
ads_currentItem = (ads_currentItem + 1) % ads_imageViews.size();
handler.obtainMessage().sendToTarget(); // 通过Handler切换图片
}
/**
* 当ViewPager中页面的状态发生改变时调用
*
*/
private class MyPageChangeListener implements OnPageChangeListener {
private int oldPosition = 0;
/**
* This method will be invoked when a new page becomes selected.
* position: Position index of the new selected page.
*/
public void onPageSelected(int position) {
ads_currentItem = position;
tvAdsTitle.setText(adsList.get(position).title);
ads_dots.get(oldPosition).setBackgroundResource(
R.drawable.dot_normal);
ads_dots.get(position)
.setBackgroundResource(R.drawable.dot_focused);
oldPosition = position;
}
public void onPageScrollStateChanged(int arg0) {
}
public void onPageScrolled(int arg0, float arg1, int arg2) {
}
}
/**
* 填充ViewPager页面的适配器
*
*/
private class AdsAdapter extends PagerAdapter {
@Override
public int getCount() {
return ads_imageViews.size();
}
@Override
public Object instantiateItem(View arg0, int arg1) {
ViewPager vp = (ViewPager) arg0;
vp.addView(ads_imageViews.get(arg1));
return ads_imageViews.get(arg1);
}
@Override
public void destroyItem(View arg0, int arg1, Object arg2) {
ViewPager vp = (ViewPager) arg0;
vp.removeView((View) arg2);
}
@Override
public boolean isViewFromObject(View arg0, Object arg1) {
return arg0 == arg1;
}
@Override
public void restoreState(Parcelable arg0, ClassLoader arg1) {
}
@Override
public Parcelable saveState() {
return null;
}
@Override
public void startUpdate(View arg0) {
}
@Override
public void finishUpdate(View arg0) {
}
}
private void setImageViewPic(final ImageView iv, String picUrl) {
if (picUrl != null && !"".equals(picUrl)) {
String picNameTemp = ProfessionalTools.MD5(picUrl);
final String strFilePath = BaseTools.getImageCachePath(mContext)
+ File.separator + picNameTemp;
File picFile = new File(strFilePath);
if (picFile.exists()) // 本地有缓存
{
Bitmap bitmap = BaseTools.getLocalBitmap(strFilePath);
if (bitmap != null) {
iv.setImageBitmap(bitmap);
}
} else {
ImageRequest imageRequest = new ImageRequest(picUrl,
new Response.Listener() {
@Override
public void onResponse(Bitmap response) {
iv.setImageBitmap(response);
BaseTools.saveBitmapInLocal(response,
strFilePath);
}
}, 0, 0, Config.RGB_565, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError arg0) {
iv.setImageResource(R.drawable.loadpic_empty_listpage);
}
});
GlobalParam.g_volleyRequestQueue.add(imageRequest);
}
}
}
static class NewsViewHolder {
LinearLayout llCommon;
ImageView ivLeftImg;
TextView tvTitle;
TextView tvSource;
TextView tvCommentCount;
}
}
其中，
a. 显示广告的布局文件为ads_head.xml，用一个自定义ViewPager（AdsViewPager）来显示滚动广告。
b. 显示新闻的布局文件为news_list_item.xml，内容比较简单，这里就不贴了。
c. 广告滚动是外部类CategoryFragment定时调用NewsAdapter的scrollAds()方法来实现的。
d. 广告列表也有自身的adapter，AdsAdapter。
代码部分讲到这里，大伙可以下载工程源码进行研究！
3.源码
模板工程源码：
http://download.csdn.net/detail/chadeltu/8363897