转载请标明出处： http://blog.csdn.net/android_ls/article/details/9228083
声明：仿人人项目，所用所有图片资源都来源于其它Android移动应用，编写本应用的目的在于学习交流，如涉及侵权请告知，我会及时换掉用到的相关图片。
有关新鲜事模块的实现前面已聊过一部分，这篇在前面Android仿人人客户端（v5.7.1）——新鲜事之状态这篇的基础上，将剩下部分的实现和在实现过程中代码的调整一一详细的聊聊。
一、基于开源组件XListView实现下拉刷新和向上滚动或点击加载更多。
1、在布局文件（fresh_news.xml）中加入XListView组件，如下
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#FFFFFF"
android:orientation="vertical" >
<com.everyone.android.widget.TopMenuNavbar
android:id="@+id/rl_top_menu_navbar"
style="@style/top_navbar" />
<include
android:id="@+id/loading"
layout="@layout/loading_progressbar" />
<com.everyone.android.widget.XListView
android:id="@+id/listview"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="#00000000"
android:cacheColorHint="#00000000"
android:divider="@drawable/v5_0_1_newsfeed_divider"
android:listSelector="@null"
android:fastScrollEnabled="true"
/>
</LinearLayout>
2、在新鲜事视图中做ListView组件替换，让新鲜事视图（FreshNewsLayout）类实现IXListViewListener接口，代码如下：
public class FreshNewsLayout extends FrameLayout implements IXListViewListener, OnClickListener {}
你会发现新鲜事视图（FreshNewsLayout）类中会多如下两个方法：
// 下拉刷新
@Override
public void onRefresh() {
}
// 加载更多
@Override
public void onLoadMore() {
}
用XListView替换掉原生的 ListView组件，并绑定数据适配器和设置事件监听器。具体代码如下：
mListView = (XListView) freshNewsViewRoot.findViewById(R.id.listview);
mListView.setPullLoadEnable(false);
mListView.setPullRefreshEnable(false);
mListView.setXListViewListener(this);
mFreshNewsAdapter = new FreshNewsAdapter(mActivity, mFreshNewsList);
mListView.setAdapter(mFreshNewsAdapter);
3、其它的代码不变，运行程序，效果图如下：
点击顶部左侧的menu按钮，效果图如下：
4、添加下拉刷新和向上滚动加载更多，代码如下：
// 下拉刷新
@Override
public void onRefresh() {
page = 1;
getFreshNews();
}
// 加载更多
@Override
public void onLoadMore() {
page++;
getFreshNews();
}
下拉刷新，运行效果图如下：
向上滑动加载更多运行，效果图如下：
二、选择顶部下拉列表中的Item，对新鲜事进行过滤处理。
1、再次罗列人人官方API 里提供有关新鲜事类型的一系列数字和各个数字含义见下面：
10 更新状态的新鲜事；11 page更新状态的新鲜事； 20 发表日志的新鲜事；21 分享日志的新鲜事；22 page发表日志的新鲜事；
23 page分享日志的新鲜事；30 上传照片的新鲜事；31 page上传照片的新鲜事；32 分享照片的新鲜事；33 分享相册的新鲜事；
34 修改头像的新鲜事；35 page修改头像的新鲜事； 36 page分享照片的新鲜事；40 成为好友的新鲜事；41 成为page粉丝的新鲜事；
50 分享视频的新鲜事；51 分享链接的新鲜事； 52 分享音乐的新鲜事； 53 page分享视频的新鲜事；54 page分享链接的新鲜事；
55 page分享音乐的新鲜事。
对新鲜事类型进行分类，具体代码如下：
/**
* 发表的新鲜事，默认请求所有类型的新鲜事
*/
private static final String FRESH_NEWS_TYPE_ALL = "10,11,20,21,22,23,30,31,32,33,34,35,36";
/**
* 好友内容
*/
private static final String FRESH_NEWS_TYPE_FRIEND = "40";
/**
* 特别关注
*/
private static final String FRESH_NEWS_TYPE_FOCUS = null;
/**
* 状态
*/
private static final String FRESH_NEWS_TYPE_STATUS = "10,11";
/**
* 照片
*/
private static final String FRESH_NEWS_TYPE_PHOTO = "30,31";
/**
* 位置
*/
private static final String FRESH_NEWS_TYPE_PLACE = null;
/**
* 分享的新鲜事
*/
private static final String FRESH_NEWS_TYPE_SHARE = "21,23,32,33,36";
/**
* 日志
*/
private static final String FRESH_NEWS_TYPE_BLOG = "20,22";
注：人人的官方API里没有提供相关的数字表示特别关注和位置，故我目前暂时给赋值为null。有关音频和视屏的部分暂时未去实现。
2、将新鲜事的分类与顶部下拉列表进行关联。
a.将新鲜事类型放入一个数组中，代码如下：
/**
* 新鲜事类型数组
*/
private String[] freshNewsTypes = {FRESH_NEWS_TYPE_ALL, FRESH_NEWS_TYPE_FRIEND,
FRESH_NEWS_TYPE_FOCUS, FRESH_NEWS_TYPE_STATUS,FRESH_NEWS_TYPE_PHOTO,
FRESH_NEWS_TYPE_PLACE, FRESH_NEWS_TYPE_SHARE,FRESH_NEWS_TYPE_BLOG};
b.设置默认的新鲜事类型
/**
* 新鲜事类型,默认为当前所支持的全部类型
*/
private String fresh_news_type = FRESH_NEWS_TYPE_ALL;
c.顶部下拉列表Item单击事件的处理，代码如下：
mPopupListView.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
mPopupWindow.dismiss();
// 当前选择的项与之前的一样，则不做处理。
if (mPopupAdapter.getPosition() == position) {
return;
}
// 新鲜事过滤事件处理
fresh_news_type = freshNewsTypes[position];
LogUtil.i(TAG, "onItemClick position = " + position);
LogUtil.i(TAG, "onItemClick fresh_news_type = " + fresh_news_type);
if(fresh_news_type == null){
Toast.makeText(mActivity.getApplicationContext(), "抱歉，您选择的项官方API暂时未提供如何获取相应的数据！", Toast.LENGTH_LONG).show();
return;
}
mPopupAdapter.setPosition(position);
mPopupAdapter.notifyDataSetChanged();
topMenuNavbar.tvTitle.setText(mTexts[position]);
page = 1;
mFreshNewsList.clear();
getFreshNews();
}
});
d. 向服务器端发送请求的 getFreshNews()方法里面的具体处理，代码如下：
/**
* 向服务器端请求新鲜事的数据
*/
public void getFreshNews() {
String accessToken = mAuthTokenManager.getAccessToken();
LogUtil.e(TAG, "accessToken = " + accessToken);
Map<String, String> parameter = new HashMap<String, String>();
parameter.put("v", "1.0"); // API的版本号，固定值为1.0
parameter.put("access_token", accessToken); // OAuth2.0验证授权后获得的token。
parameter.put("format", "JSON"); // 返回值的格式。请指定为JSON或者XML
parameter.put("call_id", "1.0"); // 请求队列号
parameter.put("method", "feed.get");
parameter.put("type", fresh_news_type); // 新鲜事的类别，多个类型以逗号分隔，type列表
// parameter.put("uid", ""); // 支持传入当前用户的一个好友ID,表示获取此好友的新鲜事，如果不传，默认为获取当前用户的新鲜事
parameter.put("page", page + ""); // 支持分页，指定页号，页号从1开始，默认值为1
parameter.put("count", pageCount + ""); // 支持分页，每一页记录数，默认值为30，最大50
AsyncHttpsPost asyncHttpsPost = new AsyncHttpsPost(Constant.API_SERVER_URL, parameter, new ParseCallback() {
@Override
public LinkedList<FreshNews> parse(String json) throws JSONException {
LogUtil.i(TAG, "json = " + json);
if ("[]".equals(json)) {
return null;
}
Gson gson = new Gson();
java.lang.reflect.Type type = new TypeToken<LinkedList<FreshNews>>() {
}.getType();
LinkedList<FreshNews> freshNewsList = gson.fromJson(json, type);
LogUtil.e(TAG, "freshNewsList = " + freshNewsList.size());
return freshNewsList;
}
}, new ResultCallback() {
@Override
public void onSuccess(final Object obj) {
mHandler.post(new Runnable() {
@Override
public void run() {
if (obj != null && obj instanceof LinkedList) {
@SuppressWarnings("unchecked")
LinkedList<FreshNews> freshNewsList = (LinkedList<FreshNews>) obj;
if (freshNewsList.size() > 0) {
// 下拉刷新的数据去重复处理
if (page == 1 && mFreshNewsList.size() > 0) {
for (FreshNews freshNews : freshNewsList) {
boolean flage = false;
for (FreshNews fresh : mFreshNewsList) {
if(freshNews.getPost_id() == fresh.getPost_id()){
flage = true;
}
}
if(flage == false){
mFreshNewsList.addFirst(freshNews);
}
}
} else {
mFreshNewsList.addAll(freshNewsList);
}
mListView.setPullLoadEnable(true);
mListView.setPullRefreshEnable(true);
}
} else {
mListView.setPullLoadEnable(false);
}
if (page == 1) {
if (mLoadingView.isShown()) {
mLoadingView.setVisibility(View.GONE);
}
mFreshNewsAdapter.notifyDataSetInvalidated();
mListView.stopRefresh();
} else {
mFreshNewsAdapter.notifyDataSetChanged();
mListView.stopLoadMore();
}
// 设置刷新时间
String refreshTime = mDateFormat.format(System.currentTimeMillis());
mListView.setRefreshTime(refreshTime);
}
});
}
@Override
public void onFail(int errorCode) {
LogUtil.i(TAG, "freshNewsList errorCode = " + errorCode);
}
});
mDefaultThreadPool.execute(asyncHttpsPost);
mAsyncRequests.add(asyncHttpsPost);
}
先看下运行后的效果图，按状态过滤，运行效果图如下：
按照片过滤，运行效果图如下：
按分享过滤，运行效果图如下：
按日志过滤，运行效果图如下：
e.看完效果图，我们来看看ListView的Item布局文件（fresh_news_list_item.xml），配置内容如下：
<?xml version="1.0" encoding="UTF-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="@drawable/fresh_news_list_item_selector" >
<!-- 头像 -->
<ImageView
android:id="@+id/iv_user_image"
android:layout_width="43.0dip"
android:layout_height="43.0dip"
android:layout_marginLeft="10.0dip"
android:layout_marginTop="8.0dip"
android:saveEnabled="true"
android:scaleType="center"
android:src="@drawable/v5_0_1_widget_default_head" />
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="8dip"
android:layout_marginRight="8dip"
android:layout_marginTop="8dip"
android:layout_toRightOf="@+id/iv_user_image"
android:orientation="vertical"
android:paddingBottom="8dip" >
<!-- 昵称 -->
<TextView
android:id="@+id/tv_nickname"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="5.0dip"
android:textColor="#ff005092"
android:textSize="16sp" />
<!-- 用户自定义输入的内容 -->
<TextView
android:id="@+id/tv_message_content"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="5.0dip"
android:textColor="#000000"
android:textSize="15.0sp" />
<!-- 状态 -->
<include
android:id="@+id/ll_status"
layout="@layout/fresh_news_item_state"
android:visibility="gone" />
<!-- 图片 -->
<include
android:id="@+id/ll_photo"
layout="@layout/fresh_news_item_photo"
android:visibility="gone" />
<!-- 日志 -->
<include
android:id="@+id/ll_blog"
layout="@layout/fresh_news_item_blog"
android:visibility="gone" />
<!-- 更新头像 -->
<ImageView
android:id="@+id/iv_update_icon"
android:layout_width="80dip"
android:layout_height="80dip"
android:scaleType="centerCrop"
android:visibility="gone" />
<!-- 时间和来源 -->
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content" >
<!-- 时间 -->
<TextView
android:id="@+id/tv_published"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="8.0dip"
android:drawablePadding="3dip"
android:textColor="#ff666666"
android:textSize="12.0sp" />
<!-- 来源 -->
<TextView
android:id="@+id/tv_source"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="15dip"
android:layout_marginTop="8.0dip"
android:layout_toRightOf="@+id/tv_published"
android:textColor="#ff666666"
android:textSize="12.0sp" />
</RelativeLayout>
<!-- 评论信息 -->
<LinearLayout
android:id="@+id/ll_comments_content"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginTop="7.0dip"
android:background="@drawable/fresh_news_popup"
android:orientation="vertical"
android:padding="10dip"
android:visibility="gone" />
</LinearLayout>
</RelativeLayout>
其中包含的有关状态的 布局文件（fresh_news_item_state.xml），内容如下：
<?xml version="1.0" encoding="UTF-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<View
android:layout_width="2dip"
android:layout_height="fill_parent"
android:background="#20333333" />
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="10dip"
android:orientation="vertical" >
<TextView
android:id="@+id/tv_status_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#ff005092"
android:textSize="14sp" />
<TextView
android:id="@+id/tv_status_content"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="8dip"
android:textColor="#ff888888"
android:textSize="14sp" />
</LinearLayout>
</LinearLayout>
其中包含的有关照片的 布局文件（fresh_news_item_photo.xml），内容如下：
<?xml version="1.0" encoding="UTF-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<View
android:id="@+id/v_photo_left_line"
android:layout_width="2dip"
android:layout_height="fill_parent"
android:layout_marginRight="10dip"
android:background="#20333333" />
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<TextView
android:id="@+id/tv_photo_owner_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#ff005092"
android:textSize="14sp" />
<TextView
android:id="@+id/tv_photo_describe"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="10dip"
android:textColor="#000000"
android:textSize="13sp" />
<ImageView
android:id="@+id/iv_photo_image"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="10dip" />
<!-- 人人官方的做法，显示固定大小的图片，并对原图进行剪裁。根据设置的宽高选择适中的区域进行裁剪-->
<!--
<ImageView
android:id="@+id/iv_photo_image"
android:layout_width="150dip"
android:layout_height="150dip"
android:layout_marginTop="10dip"
android:scaleType="centerCrop" />
-->
<TextView
android:id="@+id/tv_photo_source"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="10dip"
android:textColor="#ff888888"
android:textSize="13sp" />
</LinearLayout>
</LinearLayout>
其中包含的有关日志的 布局文件（fresh_news_item_blog.xml），内容如下：
<?xml version="1.0" encoding="UTF-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<View
android:id="@+id/v_blog_left_line"
android:layout_width="2dip"
android:layout_height="fill_parent"
android:layout_marginRight="10dip"
android:background="#20333333" />
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<TextView
android:id="@+id/tv_blog_owner_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#ff005092"
android:textSize="14sp" />
<TextView
android:id="@+id/tv_blog_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="8dip"
android:layout_marginTop="8dip"
android:textColor="#ff005092"
android:textSize="14sp" />
<TextView
android:id="@+id/tv_blog_describe"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#ff888888"
android:textSize="14sp" />
</LinearLayout>
</LinearLayout>
三、完整代码
1、组件XListView的数据适配器（FreshNewsAdapter）的源码如下：
package com.everyone.android.ui.freshnews;
import java.util.LinkedList;
import android.graphics.Color;
import android.text.TextUtils;
import android.util.TypedValue;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewGroup.LayoutParams;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import com.everyone.android.R;
import com.everyone.android.bitmap.ImageLoader;
import com.everyone.android.entity.Attachment;
import com.everyone.android.entity.Comment;
import com.everyone.android.entity.Comments;
import com.everyone.android.entity.FreshNews;
import com.everyone.android.entity.ImageInfo;
import com.everyone.android.entity.Source;
import com.everyone.android.ui.EveryoneActivity;
import com.everyone.android.utils.DensityUtil;
import com.everyone.android.utils.LogUtil;
/**
* 功能描述：新鲜事列表数据适配器
* @author android_ls
*/
public class FreshNewsAdapter extends BaseAdapter {
/**
* LOG打印标签
*/
private static final String TAG = "FreshNewsAdapter";
private LayoutInflater inflater;
private LinkedList<FreshNews> mFreshNewsList;
private EveryoneActivity mActivity;
private ImageLoader mImageLoader;
public FreshNewsAdapter(EveryoneActivity activity, LinkedList<FreshNews> freshNewsList) {
inflater = LayoutInflater.from(activity);
mActivity = activity;
mFreshNewsList = freshNewsList;
this.mImageLoader = new ImageLoader(mActivity);
}
@Override
public int getCount() {
return mFreshNewsList.size();
}
@Override
public Object getItem(int arg0) {
return mFreshNewsList.get(arg0);
}
@Override
public long getItemId(int position) {
return position;
}
/* (non-Javadoc)
* @see android.widget.Adapter#getView(int, android.view.View, android.view.ViewGroup)
*/
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
ViewHolder holder = null;
if (convertView == null) {
convertView = inflater.inflate(R.layout.fresh_news_list_item, null);
holder = new ViewHolder();
holder.imageView1 = (ImageView) convertView.findViewById(R.id.iv_user_image);
holder.text1 = (TextView) convertView.findViewById(R.id.tv_nickname);
holder.text2 = (TextView) convertView.findViewById(R.id.tv_message_content);
holder.linearLayout1 = (LinearLayout) convertView.findViewById(R.id.ll_comments_content);
holder.linearLayout2 = (LinearLayout) convertView.findViewById(R.id.ll_status);
holder.linearLayout3 = (LinearLayout) convertView.findViewById(R.id.ll_photo);
holder.linearLayout4 = (LinearLayout) convertView.findViewById(R.id.ll_blog);
holder.text7 = (TextView) convertView.findViewById(R.id.tv_photo_owner_name);
holder.text8 = (TextView) convertView.findViewById(R.id.tv_photo_describe);
holder.imageView2 = (ImageView) convertView.findViewById(R.id.iv_photo_image);
holder.text9 = (TextView) convertView.findViewById(R.id.tv_photo_source);
holder.text10 = (TextView) convertView.findViewById(R.id.tv_blog_owner_name);
holder.text11 = (TextView) convertView.findViewById(R.id.tv_blog_title);
holder.text12 = (TextView) convertView.findViewById(R.id.tv_blog_describe);
holder.imageView3 = (ImageView) convertView.findViewById(R.id.iv_update_icon);
holder.text3 = (TextView) convertView.findViewById(R.id.tv_published);
holder.text4 = (TextView) convertView.findViewById(R.id.tv_source);
holder.text5 = (TextView) convertView.findViewById(R.id.tv_status_name);
holder.text6 = (TextView) convertView.findViewById(R.id.tv_status_content);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
final FreshNews freshNews = mFreshNewsList.get(position);
// 姓名
holder.text1.setText(freshNews.getName());
LogUtil.i(TAG, "freshNews.getName() = " + freshNews.getName());
LogUtil.i(TAG, "description = " + freshNews.getDescription());
LogUtil.i(TAG, "freshNews.getMessage() = " + freshNews.getMessage());
LogUtil.i(TAG, "freshNews.getTitle() = " + freshNews.getTitle());
// 加载图像
String headurl = freshNews.getHeadurl();
LogUtil.i(TAG, "headurl = " + headurl);
if (!TextUtils.isEmpty(headurl)) {
int widthPx = DensityUtil.dip2px(mActivity, 43);
ImageInfo imgInfo = new ImageInfo(holder.imageView1, headurl, widthPx, widthPx);
mImageLoader.displayImage(imgInfo);
}
// 用户自定义输入的内容
String message = freshNews.getMessage();
if (!TextUtils.isEmpty(message)) {
holder.text2.setVisibility(View.VISIBLE);
holder.text2.setText(message);
} else {
holder.text2.setVisibility(View.GONE);
}
// 内容的前缀
String prefix = freshNews.getPrefix();
LogUtil.i(TAG, "freshNews.getPrefix() = " + prefix);
holder.linearLayout2.setVisibility(View.GONE);
holder.linearLayout3.setVisibility(View.GONE);
holder.linearLayout4.setVisibility(View.GONE);
holder.imageView3.setVisibility(View.GONE);
// 新鲜事中包含的媒体内容
LinkedList<Attachment> attachments = freshNews.getAttachment();
if (attachments != null) {
int size = attachments.size();
LogUtil.i(TAG, "size = " + size);
for (int i = 0; i < size; i++) {
Attachment att = attachments.get(i);
String media_type = att.getMedia_type();
LogUtil.i(TAG, "media_type = " + media_type);
LogUtil.i(TAG, "att.getContent() = " + att.getContent());
LogUtil.i(TAG, "getHref = " + att.getHref());
LogUtil.i(TAG, "att.getOwner_id() = " + att.getOwner_id());
LogUtil.i(TAG, "getOwner_name() = " + att.getOwner_name());
LogUtil.i(TAG, "getRaw_src() = " + att.getRaw_src());
LogUtil.i(TAG, "getScr() = " + att.getScr());
if ("status".equals(media_type)) {
holder.linearLayout2.setVisibility(View.VISIBLE);
holder.text5.setText(att.getOwner_name());
holder.text6.setText(att.getContent());
} else if ("photo".equals(media_type)) {
holder.linearLayout3.setVisibility(View.VISIBLE);
holder.imageView2.setImageBitmap(null);
String raw_src = att.getRaw_src();
if(raw_src != null){
ImageInfo imgInfo = new ImageInfo(holder.imageView2, raw_src);
mImageLoader.displayImage(imgInfo);
}
String owner_name = att.getOwner_name();
if(!TextUtils.isEmpty(owner_name)){
holder.text7.setVisibility(View.VISIBLE);
holder.text7.setText(owner_name);
} else {
holder.text7.setVisibility(View.GONE);
}
String description = freshNews.getDescription();
if(!TextUtils.isEmpty(description)){
holder.text8.setVisibility(View.VISIBLE);
holder.text8.setText(description);
} else {
holder.text8.setVisibility(View.GONE);
}
holder.text9.setText("【" + freshNews.getTitle() + "】");
}else if ("blog".equals(media_type)) {
holder.linearLayout4.setVisibility(View.VISIBLE);
holder.text10.setText(att.getOwner_name());
holder.text11.setText(freshNews.getTitle());
holder.text12.setText(freshNews.getDescription());
}else if ("link".equals(media_type)) {
} else if ("album".equals(media_type)) {
} else if ("link".equals(media_type)) {
} else if ("video".equals(media_type)) {
} else if ("audio".equals(media_type)) {
}
}
}
// page代表公共主页新鲜事
int feedType = freshNews.getFeed_type();
LogUtil.i(TAG, "feedType = " + feedType);
switch (feedType) {
case 10: // 更新状态的新鲜事。
case 11: // page更新状态的新鲜事。
// 设置状态标识图标
holder.text3.setCompoundDrawablesWithIntrinsicBounds(R.drawable.v5_0_1_newsfeed_status_icon, 0, 0, 0);
break;
case 20: // 发表日志的新鲜事。
case 22: // page发表日志的新鲜事。
holder.text3.setCompoundDrawablesWithIntrinsicBounds(R.drawable.v5_0_1_newsfeed_blog_icon, 0, 0, 0);
holder.linearLayout4.setVisibility(View.VISIBLE);
holder.linearLayout4.findViewById(R.id.v_blog_left_line).setVisibility(View.GONE);
holder.text10.setVisibility(View.GONE);
if (!TextUtils.isEmpty(prefix)) {
holder.text2.setVisibility(View.VISIBLE);
holder.text2.setText(prefix);
} else {
holder.text2.setVisibility(View.GONE);
}
holder.text11.setText(freshNews.getTitle());
holder.text12.setText(freshNews.getDescription());
break;
case 30: // 上传照片的新鲜事。
case 31: // page上传照片的新鲜事。
holder.text3.setCompoundDrawablesWithIntrinsicBounds(R.drawable.v5_0_1_newsfeed_photo_icon, 0, 0, 0);
holder.linearLayout3.findViewById(R.id.v_photo_left_line).setVisibility(View.GONE);
break;
case 21: // 分享日志的新鲜事。
case 23: // page分享日志的新鲜事。
case 32: // 分享照片的新鲜事。
case 33: // 分享相册的新鲜事。
// 设置分享标识图标
holder.text3.setCompoundDrawablesWithIntrinsicBounds(R.drawable.v5_0_1_newsfeed_share_icon, 0, 0, 0);
if(feedType == 32 || feedType == 33){
holder.linearLayout3.findViewById(R.id.v_photo_left_line).setVisibility(View.VISIBLE);
}
break;
case 34: // 修改头像的新鲜事。
case 35: // page修改头像的新鲜事。
holder.text2.setVisibility(View.VISIBLE);
holder.text2.setText("更新头像");
holder.imageView3.setVisibility(View.VISIBLE);
ImageInfo imgInfo = new ImageInfo(holder.imageView3, headurl);
mImageLoader.displayImage(imgInfo);
break;
// ...
default:
break;
}
// 动态生成显示评论信息的Item
Comments comments = freshNews.getComments();
if (comments != null) {
LinkedList<Comment> commentList = comments.getComment();
if (commentList != null) {
holder.linearLayout1.setVisibility(View.VISIBLE);
if (holder.linearLayout1.getChildCount() > 0) {
holder.linearLayout1.removeAllViews();
}
int count = comments.getCount();
if (count > 0) {
TextView tvCount = new TextView(mActivity);
tvCount.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
tvCount.setTextSize(TypedValue.COMPLEX_UNIT_SP, 14);
tvCount.setSingleLine();
tvCount.setCompoundDrawablePadding(5);
tvCount.setPadding(0, 10, 0, 0);
tvCount.setText(count + "条评论");
tvCount.setTextColor(Color.parseColor("#ff005092"));
tvCount.setCompoundDrawablesWithIntrinsicBounds(R.drawable.fresh_news_comment_icon, 0, 0, 0);
holder.linearLayout1.addView(tvCount);
}
int size = commentList.size();
LogUtil.i(TAG, "commentList size = " + size);
for (int i = 0; i < size; i++) {
Comment comment = commentList.get(i);
LayoutParams layoutParams = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
TextView tvContent = new TextView(mActivity);
tvContent.setLayoutParams(layoutParams);
tvContent.setTextColor(Color.BLACK);
tvContent.setTextSize(TypedValue.COMPLEX_UNIT_SP, 14);
tvContent.setSingleLine();
tvContent.setPadding(0, 10, 0, 0);
tvContent.setText(comment.getName() + "：" + comment.getText());
holder.linearLayout1.addView(tvContent);
TextView tvTime = new TextView(mActivity);
tvTime.setTextColor(Color.GRAY);
tvTime.setTextSize(TypedValue.COMPLEX_UNIT_SP, 12);
tvTime.setLayoutParams(layoutParams);
tvContent.setPadding(0, 5, 0, 10);
tvTime.setText(comment.getTime());
holder.linearLayout1.addView(tvTime);
}
} else {
holder.linearLayout1.setVisibility(View.GONE);
}
} else {
holder.linearLayout1.setVisibility(View.GONE);
}
// 对获取的时间字符串的处理
String updateTime = freshNews.getUpdate_time();
if (!TextUtils.isEmpty(updateTime)) {
updateTime = updateTime.substring(updateTime.indexOf("-") + 1, updateTime.lastIndexOf(":"));
updateTime = updateTime.replace("-", "月");
updateTime = updateTime.replace(" ", "日 ");
int index = updateTime.indexOf("0");
if (index == 0) {
updateTime = updateTime.substring(index + 1);
}
holder.text3.setText(updateTime);
}
// 来自那种客户端
Source source = freshNews.getSource();
if (source != null) {
holder.text4.setText("来自:" + source.getText());
}
return convertView;
}
static class ViewHolder {
public LinearLayout linearLayout1;
public LinearLayout linearLayout2;
public LinearLayout linearLayout3;
public LinearLayout linearLayout4;
public ImageView imageView1;
public ImageView imageView2;
public ImageView imageView3;
public TextView text1;
public TextView text2;
public TextView text3;
public TextView text4;
public TextView text5;
public TextView text6;
public TextView text7;
public TextView text8;
public TextView text9;
public TextView text10;
public TextView text11;
public TextView text12;
}
}
2、新鲜事视图完整源码如下：
package com.everyone.android.ui.freshnews;
import java.text.SimpleDateFormat;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import org.json.JSONException;
import android.content.Context;
import android.os.Handler;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.FrameLayout;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.PopupWindow;
import android.widget.Toast;
import com.everyone.android.R;
import com.everyone.android.api.AuthTokenManager;
import com.everyone.android.callback.ParseCallback;
import com.everyone.android.callback.ResultCallback;
import com.everyone.android.entity.FreshNews;
import com.everyone.android.net.AsyncBaseRequest;
import com.everyone.android.net.AsyncHttpsPost;
import com.everyone.android.net.DefaultThreadPool;
import com.everyone.android.ui.EveryoneActivity;
import com.everyone.android.utils.Constant;
import com.everyone.android.utils.LogUtil;
import com.everyone.android.widget.TopMenuNavbar;
import com.everyone.android.widget.XListView;
import com.everyone.android.widget.XListView.IXListViewListener;
import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;
/**
* 功能描述：新鲜事视图
* @author android_ls
*/
public class FreshNewsLayout extends FrameLayout implements IXListViewListener, OnClickListener {
/**
* LOG打印标签
*/
private static final String TAG = "FreshNewsLayout";
private TopMenuNavbar topMenuNavbar;
/**
* 每一页记录数，默认值为30，最大50
*/
private int pageCount = 30;
/**
* 当前获取第几页，默认值为1
*/
private int page = 1;
public TopMenuNavbar getTopMenuNavbar() {
return topMenuNavbar;
}
private EveryoneActivity mActivity;
private List<AsyncBaseRequest> mAsyncRequests;
private DefaultThreadPool mDefaultThreadPool;
private Handler mHandler;
public AuthTokenManager mAuthTokenManager;
private LinearLayout mLoadingView;
private XListView mListView;
private FreshNewsAdapter mFreshNewsAdapter;
/**
* 新鲜事信息集合
*/
private LinkedList<FreshNews> mFreshNewsList = new LinkedList<FreshNews>();
private PopupWindow mPopupWindow;
/**
* 顶部下拉列表
*/
private ListView mPopupListView;
/**
* 顶部下拉列表数据适配器
*/
private FreshNewsPopupAdapter mPopupAdapter;
/**
* 顶部下拉列表的操作提示文本数组
*/
private String[] mTexts;
/**
* 顶部下拉列表的操作指示图标Id数组
*/
private int[] mIcons = {
R.drawable.v5_0_1_newsfeed_popupwindow_type_all_background,
R.drawable.v5_0_1_newsfeed_popupwindow_type_friend_background,
R.drawable.v5_0_1_newsfeed_popupwindow_type_specialfocus_background,
R.drawable.v5_0_1_newsfeed_popupwindow_type_status_background,
R.drawable.v5_0_1_newsfeed_popupwindow_type_photo_background,
R.drawable.v5_0_1_newsfeed_popupwindow_type_place_background,
R.drawable.v5_0_1_newsfeed_popupwindow_type_share_background,
R.drawable.v5_0_1_newsfeed_popupwindow_type_blog_background };
/* 10 更新状态的新鲜事。
11 page更新状态的新鲜事。
20 发表日志的新鲜事。
21 分享日志的新鲜事。
22 page发表日志的新鲜事。
23 page分享日志的新鲜事。
30 上传照片的新鲜事。
31 page上传照片的新鲜事。
32 分享照片的新鲜事。
33 分享相册的新鲜事。
34 修改头像的新鲜事。
35 page修改头像的新鲜事。
36 page分享照片的新鲜事。
40 成为好友的新鲜事。
41 成为page粉丝的新鲜事。
50 分享视频的新鲜事。
51 分享链接的新鲜事。
52 分享音乐的新鲜事。
53 page分享视频的新鲜事。
54 page分享链接的新鲜事。
55 page分享音乐的新鲜事。
*/
/**
* 发表的新鲜事，默认请求所有类型的新鲜事
*/
private static final String FRESH_NEWS_TYPE_ALL = "10,11,20,21,22,23,30,31,32,33,34,35,36";
/**
* 好友内容
*/
private static final String FRESH_NEWS_TYPE_FRIEND = "40";
/**
* 特别关注
*/
private static final String FRESH_NEWS_TYPE_FOCUS = null;
/**
* 状态
*/
private static final String FRESH_NEWS_TYPE_STATUS = "10,11";
/**
* 照片
*/
private static final String FRESH_NEWS_TYPE_PHOTO = "30,31";
/**
* 位置
*/
private static final String FRESH_NEWS_TYPE_PLACE = null;
/**
* 分享的新鲜事
*/
private static final String FRESH_NEWS_TYPE_SHARE = "21,23,32,33,36";
/**
* 日志
*/
private static final String FRESH_NEWS_TYPE_BLOG = "20,22";
/**
* 新鲜事类型数组
*/
private String[] freshNewsTypes = {FRESH_NEWS_TYPE_ALL, FRESH_NEWS_TYPE_FRIEND,
FRESH_NEWS_TYPE_FOCUS, FRESH_NEWS_TYPE_STATUS,FRESH_NEWS_TYPE_PHOTO,
FRESH_NEWS_TYPE_PLACE, FRESH_NEWS_TYPE_SHARE,FRESH_NEWS_TYPE_BLOG};
/**
* 新鲜事类型,默认为当前所支持的全部类型
*/
private String fresh_news_type = FRESH_NEWS_TYPE_ALL;
private SimpleDateFormat mDateFormat;
public FreshNewsLayout(EveryoneActivity activity) {
super(activity);
mActivity = activity;
this.mAsyncRequests = activity.getAsyncRequests();
this.mDefaultThreadPool = activity.getDefaultThreadPool();
this.mHandler = activity.getHandler();
this.mAuthTokenManager = activity.getAuthTokenManager();
mDateFormat = new SimpleDateFormat("yyyy年MM月dd日 HH:mm:ss");
setupViews();
// 初始化下拉列表
setupPopupWindow();
}
public FreshNewsLayout(Context context, AttributeSet attrs) {
super(context, attrs);
setupViews();
}
private void setupPopupWindow() {
mTexts = mActivity.getResources().getStringArray(R.array.fresh_news_filter_list);
View view = LayoutInflater.from(mActivity).inflate(R.layout.fresh_news_popupwindow, null);
mPopupWindow = new PopupWindow(view, LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT, true);
mPopupWindow.setAnimationStyle(R.style.fresh_news_popup_animation);
mPopupListView = (ListView) view.findViewById(R.id.popup_listview);
mPopupAdapter = new FreshNewsPopupAdapter(mActivity, mIcons, mTexts);
mPopupListView.setAdapter(mPopupAdapter);
mPopupListView.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
mPopupWindow.dismiss();
// 当前选择的项与之前的一样，则不做处理。
if (mPopupAdapter.getPosition() == position) {
return;
}
// 新鲜事过滤事件处理
fresh_news_type = freshNewsTypes[position];
LogUtil.i(TAG, "onItemClick position = " + position);
LogUtil.i(TAG, "onItemClick fresh_news_type = " + fresh_news_type);
if(fresh_news_type == null){
Toast.makeText(mActivity.getApplicationContext(), "抱歉，您选择的项官方API暂时未提供如何获取相应的数据！", Toast.LENGTH_LONG).show();
return;
}
mPopupAdapter.setPosition(position);
mPopupAdapter.notifyDataSetChanged();
topMenuNavbar.tvTitle.setText(mTexts[position]);
page = 1;
mFreshNewsList.clear();
getFreshNews();
}
});
}
private void setupViews() {
final LayoutInflater mLayoutInflater = LayoutInflater.from(getContext());
LinearLayout freshNewsViewRoot = (LinearLayout) mLayoutInflater.inflate(R.layout.fresh_news, null);
addView(freshNewsViewRoot);
// 加载提示进度条
mLoadingView = (LinearLayout) freshNewsViewRoot.findViewById(R.id.loading);
topMenuNavbar = (TopMenuNavbar) freshNewsViewRoot.findViewById(R.id.rl_top_menu_navbar);
topMenuNavbar.mLlDownList.setOnClickListener(this);
topMenuNavbar.mLlRefresh.setOnClickListener(this);
topMenuNavbar.ivRightLine.setVisibility(View.GONE);
topMenuNavbar.tvRightOperationName.setVisibility(View.GONE);
mListView = (XListView) freshNewsViewRoot.findViewById(R.id.listview);
mListView.setPullLoadEnable(false);
mListView.setPullRefreshEnable(false);
mListView.setXListViewListener(this);
mFreshNewsAdapter = new FreshNewsAdapter(mActivity, mFreshNewsList);
mListView.setAdapter(mFreshNewsAdapter);
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.ll_down_list:
if (mPopupWindow != null) {
mPopupWindow.showAsDropDown(topMenuNavbar);
}
break;
case R.id.ll_refresh:
// mHeaderView.setState(XListViewHeader.STATE_REFRESHING);
// page = 1;
// getFreshNews();
break;
default:
break;
}
}
// 下拉刷新
@Override
public void onRefresh() {
page = 1;
getFreshNews();
}
// 加载更多
@Override
public void onLoadMore() {
page++;
getFreshNews();
}
/**
* 向服务器端请求新鲜事的数据
*/
public void getFreshNews() {
String accessToken = mAuthTokenManager.getAccessToken();
LogUtil.e(TAG, "accessToken = " + accessToken);
Map<String, String> parameter = new HashMap<String, String>();
parameter.put("v", "1.0"); // API的版本号，固定值为1.0
parameter.put("access_token", accessToken); // OAuth2.0验证授权后获得的token。
parameter.put("format", "JSON"); // 返回值的格式。请指定为JSON或者XML
parameter.put("call_id", "1.0"); // 请求队列号
parameter.put("method", "feed.get");
parameter.put("type", fresh_news_type); // 新鲜事的类别，多个类型以逗号分隔，type列表
// parameter.put("uid", ""); // 支持传入当前用户的一个好友ID,表示获取此好友的新鲜事，如果不传，默认为获取当前用户的新鲜事
parameter.put("page", page + ""); // 支持分页，指定页号，页号从1开始，默认值为1
parameter.put("count", pageCount + ""); // 支持分页，每一页记录数，默认值为30，最大50
AsyncHttpsPost asyncHttpsPost = new AsyncHttpsPost(Constant.API_SERVER_URL, parameter, new ParseCallback() {
@Override
public LinkedList<FreshNews> parse(String json) throws JSONException {
LogUtil.i(TAG, "json = " + json);
if ("[]".equals(json)) {
return null;
}
Gson gson = new Gson();
java.lang.reflect.Type type = new TypeToken<LinkedList<FreshNews>>() {
}.getType();
LinkedList<FreshNews> freshNewsList = gson.fromJson(json, type);
LogUtil.e(TAG, "freshNewsList = " + freshNewsList.size());
return freshNewsList;
}
}, new ResultCallback() {
@Override
public void onSuccess(final Object obj) {
mHandler.post(new Runnable() {
@Override
public void run() {
if (obj != null && obj instanceof LinkedList) {
@SuppressWarnings("unchecked")
LinkedList<FreshNews> freshNewsList = (LinkedList<FreshNews>) obj;
if (freshNewsList.size() > 0) {
// 下拉刷新的数据去重复处理
if (page == 1 && mFreshNewsList.size() > 0) {
for (FreshNews freshNews : freshNewsList) {
boolean flage = false;
for (FreshNews fresh : mFreshNewsList) {
if(freshNews.getPost_id() == fresh.getPost_id()){
flage = true;
}
}
if(flage == false){
mFreshNewsList.addFirst(freshNews);
}
}
} else {
mFreshNewsList.addAll(freshNewsList);
}
mListView.setPullLoadEnable(true);
mListView.setPullRefreshEnable(true);
}
} else {
mListView.setPullLoadEnable(false);
}
if (page == 1) {
if (mLoadingView.isShown()) {
mLoadingView.setVisibility(View.GONE);
}
mFreshNewsAdapter.notifyDataSetInvalidated();
mListView.stopRefresh();
} else {
mFreshNewsAdapter.notifyDataSetChanged();
mListView.stopLoadMore();
}
// 设置刷新时间
String refreshTime = mDateFormat.format(System.currentTimeMillis());
mListView.setRefreshTime(refreshTime);
}
});
}
@Override
public void onFail(int errorCode) {
LogUtil.i(TAG, "freshNewsList errorCode = " + errorCode);
}
});
mDefaultThreadPool.execute(asyncHttpsPost);
mAsyncRequests.add(asyncHttpsPost);
}
}
3、 新鲜事视图顶部，下拉列表数据适配器的完整源码如下：
package com.everyone.android.ui.freshnews;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.CheckBox;
import android.widget.ImageView;
import com.everyone.android.R;
/**
* 功能描述：新鲜事视图顶部下拉列表数据适配器
* @author android_ls
*
*/
public class FreshNewsPopupAdapter extends BaseAdapter {
private LayoutInflater mInflater;
private int[] mIcon;
private String[] mName;
private int mPosition;
public int getPosition() {
return mPosition;
}
public void setPosition(int mPosition) {
this.mPosition = mPosition;
}
public FreshNewsPopupAdapter(Context context, int[] icon, String[] name) {
mInflater = LayoutInflater.from(context);
mIcon = icon;
mName = name;
}
public int getCount() {
return mIcon.length;
}
public Object getItem(int position) {
return null;
}
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder = null;
if (convertView == null) {
convertView = mInflater.inflate(R.layout.fresh_news_popupwindow_item, null);
holder = new ViewHolder();
holder.checkBox = (CheckBox) convertView.findViewById(R.id.cb_text_icon);
holder.imageView = (ImageView) convertView.findViewById(R.id.iv_checked);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.checkBox.setButtonDrawable(mIcon[position]);
holder.checkBox.setText(mName[position]);
holder.checkBox.setChecked(false);
holder.imageView.setVisibility(View.GONE);
if (position == mPosition) {
holder.checkBox.setChecked(true);
holder.imageView.setVisibility(View.VISIBLE);
}
return convertView;
}
static class ViewHolder {
CheckBox checkBox;
ImageView imageView;
}
}
四、开源组件的源码
1、XListView组件的源码：
/**
* @file XListView.java
* @package me.maxwin.view
* @create Mar 18, 2012 6:28:41 PM
* @author Maxwin
* @description An ListView support (a) Pull down to refresh, (b) Pull up to load more.
* Implement IXListViewListener, and see stopRefresh() / stopLoadMore().
*/
package com.everyone.android.widget;
import android.content.Context;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewTreeObserver.OnGlobalLayoutListener;
import android.view.animation.DecelerateInterpolator;
import android.widget.AbsListView;
import android.widget.AbsListView.OnScrollListener;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.RelativeLayout;
import android.widget.Scroller;
import android.widget.TextView;
import com.everyone.android.R;
public class XListView extends ListView implements OnScrollListener {
private float mLastY = -1; // save event y
private Scroller mScroller; // used for scroll back
private OnScrollListener mScrollListener; // user's scroll listener
// the interface to trigger refresh and load more.
private IXListViewListener mListViewListener;
// -- header view
private XListViewHeader mHeaderView;
// header view content, use it to calculate the Header's height. And hide it
// when disable pull refresh.
private RelativeLayout mHeaderViewContent;
private TextView mHeaderTimeView;
private int mHeaderViewHeight; // header view's height
private boolean mEnablePullRefresh = true;
private boolean mPullRefreshing = false; // is refreashing.
// -- footer view
private XListViewFooter mFooterView;
private boolean mEnablePullLoad;
private boolean mPullLoading;
private boolean mIsFooterReady = false;
// total list items, used to detect is at the bottom of listview.
private int mTotalItemCount;
// for mScroller, scroll back from header or footer.
private int mScrollBack;
private final static int SCROLLBACK_HEADER = 0;
private final static int SCROLLBACK_FOOTER = 1;
private final static int SCROLL_DURATION = 400; // scroll back duration
private final static int PULL_LOAD_MORE_DELTA = 50; // when pull up >= 50px
// at bottom, trigger
// load more.
private final static float OFFSET_RADIO = 1.8f; // support iOS like pull
// feature.
/**
* @param context
*/
public XListView(Context context) {
super(context);
initWithContext(context);
}
public XListView(Context context, AttributeSet attrs) {
super(context, attrs);
initWithContext(context);
}
public XListView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
initWithContext(context);
}
private void initWithContext(Context context) {
mScroller = new Scroller(context, new DecelerateInterpolator());
// XListView need the scroll event, and it will dispatch the event to
// user's listener (as a proxy).
super.setOnScrollListener(this);
// init header view
mHeaderView = new XListViewHeader(context);
mHeaderViewContent = (RelativeLayout) mHeaderView.findViewById(R.id.xlistview_header_content);
mHeaderTimeView = (TextView) mHeaderView.findViewById(R.id.xlistview_header_time);
addHeaderView(mHeaderView);
// init footer view
mFooterView = new XListViewFooter(context);
// init header height
mHeaderView.getViewTreeObserver().addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
mHeaderViewHeight = mHeaderViewContent.getHeight();
getViewTreeObserver().removeGlobalOnLayoutListener(this);
}
});
}
@Override
public void setAdapter(ListAdapter adapter) {
// make sure XListViewFooter is the last footer view, and only add once.
if (mIsFooterReady == false) {
mIsFooterReady = true;
addFooterView(mFooterView);
}
super.setAdapter(adapter);
}
/**
* enable or disable pull down refresh feature.
*
* @param enable
*/
public void setPullRefreshEnable(boolean enable) {
mEnablePullRefresh = enable;
if (!mEnablePullRefresh) { // disable, hide the content
mHeaderViewContent.setVisibility(View.INVISIBLE);
} else {
mHeaderViewContent.setVisibility(View.VISIBLE);
}
}
/**
* enable or disable pull up load more feature.
*
* @param enable
*/
public void setPullLoadEnable(boolean enable) {
mEnablePullLoad = enable;
if (!mEnablePullLoad) {
mFooterView.hide();
mFooterView.setOnClickListener(null);
} else {
mPullLoading = false;
mFooterView.show();
mFooterView.setState(XListViewFooter.STATE_NORMAL);
// both "pull up" and "click" will invoke load more.
mFooterView.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
startLoadMore();
}
});
}
}
/**
* stop refresh, reset header view.
*/
public void stopRefresh() {
if (mPullRefreshing == true) {
mPullRefreshing = false;
resetHeaderHeight();
}
}
/**
* stop load more, reset footer view.
*/
public void stopLoadMore() {
if (mPullLoading == true) {
mPullLoading = false;
mFooterView.setState(XListViewFooter.STATE_NORMAL);
}
}
/**
* set last refresh time
*
* @param time
*/
public void setRefreshTime(String time) {
mHeaderTimeView.setText(time);
}
private void invokeOnScrolling() {
if (mScrollListener instanceof OnXScrollListener) {
OnXScrollListener l = (OnXScrollListener) mScrollListener;
l.onXScrolling(this);
}
}
private void updateHeaderHeight(float delta) {
mHeaderView.setVisiableHeight((int) delta + mHeaderView.getVisiableHeight());
if (mEnablePullRefresh && !mPullRefreshing) { // 未处于刷新状态，更新箭头
if (mHeaderView.getVisiableHeight() > mHeaderViewHeight) {
mHeaderView.setState(XListViewHeader.STATE_READY);
} else {
mHeaderView.setState(XListViewHeader.STATE_NORMAL);
}
}
setSelection(0); // scroll to top each time
}
/**
* reset header view's height.
*/
private void resetHeaderHeight() {
int height = mHeaderView.getVisiableHeight();
if (height == 0) // not visible.
return;
// refreshing and header isn't shown fully. do nothing.
if (mPullRefreshing && height <= mHeaderViewHeight) {
return;
}
int finalHeight = 0; // default: scroll back to dismiss header.
// is refreshing, just scroll back to show all the header.
if (mPullRefreshing && height > mHeaderViewHeight) {
finalHeight = mHeaderViewHeight;
}
mScrollBack = SCROLLBACK_HEADER;
mScroller.startScroll(0, height, 0, finalHeight - height, SCROLL_DURATION);
// trigger computeScroll
invalidate();
}
private void updateFooterHeight(float delta) {
int height = mFooterView.getBottomMargin() + (int) delta;
if (mEnablePullLoad && !mPullLoading) {
if (height > PULL_LOAD_MORE_DELTA) { // height enough to invoke load
// more.
mFooterView.setState(XListViewFooter.STATE_READY);
} else {
mFooterView.setState(XListViewFooter.STATE_NORMAL);
}
}
mFooterView.setBottomMargin(height);
// setSelection(mTotalItemCount - 1); // scroll to bottom
}
private void resetFooterHeight() {
int bottomMargin = mFooterView.getBottomMargin();
if (bottomMargin > 0) {
mScrollBack = SCROLLBACK_FOOTER;
mScroller.startScroll(0, bottomMargin, 0, -bottomMargin, SCROLL_DURATION);
invalidate();
}
}
private void startLoadMore() {
mPullLoading = true;
mFooterView.setState(XListViewFooter.STATE_LOADING);
if (mListViewListener != null) {
mListViewListener.onLoadMore();
}
}
@Override
public boolean onTouchEvent(MotionEvent ev) {
if (mLastY == -1) {
mLastY = ev.getRawY();
}
switch (ev.getAction()) {
case MotionEvent.ACTION_DOWN:
mLastY = ev.getRawY();
break;
case MotionEvent.ACTION_MOVE:
final float deltaY = ev.getRawY() - mLastY;
mLastY = ev.getRawY();
if (getFirstVisiblePosition() == 0 && (mHeaderView.getVisiableHeight() > 0 || deltaY > 0)) {
// the first item is showing, header has shown or pull down.
updateHeaderHeight(deltaY / OFFSET_RADIO);
invokeOnScrolling();
} else if (getLastVisiblePosition() == mTotalItemCount - 1 && (mFooterView.getBottomMargin() > 0 || deltaY < 0)) {
// last item, already pulled up or want to pull up.
updateFooterHeight(-deltaY / OFFSET_RADIO);
}
break;
default:
mLastY = -1; // reset
if (getFirstVisiblePosition() == 0) {
// invoke refresh
if (mEnablePullRefresh && mHeaderView.getVisiableHeight() > mHeaderViewHeight) {
mPullRefreshing = true;
mHeaderView.setState(XListViewHeader.STATE_REFRESHING);
if (mListViewListener != null) {
mListViewListener.onRefresh();
}
}
resetHeaderHeight();
} else if (getLastVisiblePosition() == mTotalItemCount - 1) {
// invoke load more.
if (mEnablePullLoad && mFooterView.getBottomMargin() > PULL_LOAD_MORE_DELTA) {
startLoadMore();
}
resetFooterHeight();
}
break;
}
return super.onTouchEvent(ev);
}
@Override
public void computeScroll() {
if (mScroller.computeScrollOffset()) {
if (mScrollBack == SCROLLBACK_HEADER) {
mHeaderView.setVisiableHeight(mScroller.getCurrY());
} else {
mFooterView.setBottomMargin(mScroller.getCurrY());
}
postInvalidate();
invokeOnScrolling();
}
super.computeScroll();
}
@Override
public void setOnScrollListener(OnScrollListener l) {
mScrollListener = l;
}
@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
if (mScrollListener != null) {
mScrollListener.onScrollStateChanged(view, scrollState);
}
}
@Override
public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
// send to user's listener
mTotalItemCount = totalItemCount;
if (mScrollListener != null) {
mScrollListener.onScroll(view, firstVisibleItem, visibleItemCount, totalItemCount);
}
}
public void setXListViewListener(IXListViewListener l) {
mListViewListener = l;
}
/**
* you can listen ListView.OnScrollListener or this one. it will invoke
* onXScrolling when header/footer scroll back.
*/
public interface OnXScrollListener extends OnScrollListener {
public void onXScrolling(View view);
}
/**
* implements this interface to get refresh/load more event.
*/
public interface IXListViewListener {
public void onRefresh();
public void onLoadMore();
}
}
2、 XListViewHeader的源码如下：
package com.everyone.android.widget;
import android.content.Context;
import android.util.AttributeSet;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.RotateAnimation;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.ProgressBar;
import android.widget.TextView;
import com.everyone.android.R;
public class XListViewHeader extends LinearLayout {
private LinearLayout mContainer;
private ImageView mArrowImageView;
private ProgressBar mProgressBar;
private TextView mHintTextView;
private int mState = STATE_NORMAL;
private Animation mRotateUpAnim;
private Animation mRotateDownAnim;
private final int ROTATE_ANIM_DURATION = 180;
public final static int STATE_NORMAL = 0;
public final static int STATE_READY = 1;
public final static int STATE_REFRESHING = 2;
public XListViewHeader(Context context) {
super(context);
initView(context);
}
/**
* @param context
* @param attrs
*/
public XListViewHeader(Context context, AttributeSet attrs) {
super(context, attrs);
initView(context);
}
private void initView(Context context) {
// 初始情况，设置下拉刷新view高度为0
LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(
LayoutParams.FILL_PARENT, 0);
mContainer = (LinearLayout) LayoutInflater.from(context).inflate(
R.layout.xlistview_header, null);
addView(mContainer, lp);
setGravity(Gravity.BOTTOM);
mArrowImageView = (ImageView)findViewById(R.id.xlistview_header_arrow);
mHintTextView = (TextView)findViewById(R.id.xlistview_header_hint_textview);
mProgressBar = (ProgressBar)findViewById(R.id.xlistview_header_progressbar);
mRotateUpAnim = new RotateAnimation(0.0f, -180.0f,
Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF,
0.5f);
mRotateUpAnim.setDuration(ROTATE_ANIM_DURATION);
mRotateUpAnim.setFillAfter(true);
mRotateDownAnim = new RotateAnimation(-180.0f, 0.0f,
Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF,
0.5f);
mRotateDownAnim.setDuration(ROTATE_ANIM_DURATION);
mRotateDownAnim.setFillAfter(true);
}
public void setState(int state) {
if (state == mState) return ;
if (state == STATE_REFRESHING) { // 显示进度
mArrowImageView.clearAnimation();
mArrowImageView.setVisibility(View.INVISIBLE);
mProgressBar.setVisibility(View.VISIBLE);
} else { // 显示箭头图片
mArrowImageView.setVisibility(View.VISIBLE);
mProgressBar.setVisibility(View.INVISIBLE);
}
switch(state){
case STATE_NORMAL:
if (mState == STATE_READY) {
mArrowImageView.startAnimation(mRotateDownAnim);
}
if (mState == STATE_REFRESHING) {
mArrowImageView.clearAnimation();
}
mHintTextView.setText(R.string.xlistview_header_hint_normal);
break;
case STATE_READY:
if (mState != STATE_READY) {
mArrowImageView.clearAnimation();
mArrowImageView.startAnimation(mRotateUpAnim);
mHintTextView.setText(R.string.xlistview_header_hint_ready);
}
break;
case STATE_REFRESHING:
mHintTextView.setText(R.string.xlistview_header_hint_loading);
break;
default:
}
mState = state;
}
public void setVisiableHeight(int height) {
if (height < 0)
height = 0;
LinearLayout.LayoutParams lp = (LinearLayout.LayoutParams) mContainer
.getLayoutParams();
lp.height = height;
mContainer.setLayoutParams(lp);
}
public int getVisiableHeight() {
return mContainer.getHeight();
}
}
3、 XListViewFooter的源码如下：
package com.everyone.android.widget;
import android.content.Context;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.LinearLayout;
import android.widget.TextView;
import com.everyone.android.R;
public class XListViewFooter extends LinearLayout {
public final static int STATE_NORMAL = 0;
public final static int STATE_READY = 1;
public final static int STATE_LOADING = 2;
private Context mContext;
private View mContentView;
private View mProgressBar;
private TextView mHintView;
private TextView mLoadTextView;
public XListViewFooter(Context context) {
super(context);
initView(context);
}
public XListViewFooter(Context context, AttributeSet attrs) {
super(context, attrs);
initView(context);
}
public void setState(int state) {
mHintView.setVisibility(View.INVISIBLE);
mProgressBar.setVisibility(View.INVISIBLE);
mHintView.setVisibility(View.INVISIBLE);
mLoadTextView.setVisibility(View.INVISIBLE);
if (state == STATE_READY) {
mHintView.setVisibility(View.VISIBLE);
mHintView.setText(R.string.xlistview_footer_hint_ready);
} else if (state == STATE_LOADING) {
mProgressBar.setVisibility(View.VISIBLE);
mLoadTextView.setVisibility(View.VISIBLE);
} else {
mHintView.setVisibility(View.VISIBLE);
mHintView.setText(R.string.xlistview_footer_hint_normal);
}
}
public void setBottomMargin(int height) {
if (height < 0) return ;
LinearLayout.LayoutParams lp = (LinearLayout.LayoutParams)mContentView.getLayoutParams();
lp.bottomMargin = height;
mContentView.setLayoutParams(lp);
}
public int getBottomMargin() {
LinearLayout.LayoutParams lp = (LinearLayout.LayoutParams)mContentView.getLayoutParams();
return lp.bottomMargin;
}
/**
* normal status
*/
public void normal() {
mHintView.setVisibility(View.VISIBLE);
mProgressBar.setVisibility(View.GONE);
mLoadTextView.setVisibility(View.GONE);
}
/**
* loading status
*/
public void loading() {
mHintView.setVisibility(View.GONE);
mProgressBar.setVisibility(View.VISIBLE);
mLoadTextView.setVisibility(View.VISIBLE);
}
/**
* hide footer when disable pull load more
*/
public void hide() {
LinearLayout.LayoutParams lp = (LinearLayout.LayoutParams)mContentView.getLayoutParams();
lp.height = 0;
mContentView.setLayoutParams(lp);
}
/**
* show footer
*/
public void show() {
LinearLayout.LayoutParams lp = (LinearLayout.LayoutParams)mContentView.getLayoutParams();
lp.height = LayoutParams.WRAP_CONTENT;
mContentView.setLayoutParams(lp);
}
private void initView(Context context) {
mContext = context;
LinearLayout moreView = (LinearLayout)LayoutInflater.from(mContext).inflate(R.layout.xlistview_footer, null);
addView(moreView);
moreView.setLayoutParams(new LinearLayout.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));
mContentView = moreView.findViewById(R.id.xlistview_footer_content);
mProgressBar = moreView.findViewById(R.id.xlistview_footer_progressbar);
mLoadTextView = (TextView)moreView.findViewById(R.id.xlistview_footer_load_textView);
mHintView = (TextView)moreView.findViewById(R.id.xlistview_footer_hint_textview);
}
}
xlistview_header.xml文件源码：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="bottom" >
<RelativeLayout
android:id="@+id/xlistview_header_content"
android:layout_width="fill_parent"
android:layout_height="60dp" >
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:gravity="center"
android:orientation="vertical" android:id="@+id/xlistview_header_text">
<TextView
android:id="@+id/xlistview_header_hint_textview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/xlistview_header_hint_normal" />
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="3dp" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/xlistview_header_last_time"
android:textSize="12sp" />
<TextView
android:id="@+id/xlistview_header_time"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="12sp" />
</LinearLayout>
</LinearLayout>
<ImageView
android:id="@+id/xlistview_header_arrow"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@id/xlistview_header_text"
android:layout_centerVertical="true"
android:layout_marginLeft="-35dp"
android:src="@drawable/xlistview_arrow" />
<ProgressBar
android:id="@+id/xlistview_header_progressbar"
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_alignLeft="@id/xlistview_header_text"
android:layout_centerVertical="true"
android:layout_marginLeft="-40dp"
android:visibility="invisible" />
</RelativeLayout>
</LinearLayout>
xlistview_footer.xml的源码如下：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content" >
<RelativeLayout
android:id="@+id/xlistview_footer_content"
android:layout_width="fill_parent"
android:layout_height="45dip"
android:background="#FFFFFF" >
<TextView
android:id="@+id/xlistview_footer_hint_textview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:text="@string/xlistview_footer_hint_normal" />
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="45dip"
android:gravity="center_horizontal|center_vertical"
android:orientation="horizontal" >
<ProgressBar
android:id="@+id/xlistview_footer_progressbar"
android:layout_width="30dip"
android:layout_height="30dip" />
<TextView
android:id="@+id/xlistview_footer_load_textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingLeft="10dip"
android:text="正在加载"
android:textColor="#000000"
android:textSize="15sp" />
</LinearLayout>
</RelativeLayout>
</LinearLayout>
strings.xml文件的源码如下：
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="app_name">CopyEveryone</string>
<string-array name="left_panel_group_names">
<item>常用</item>
<item>更多</item>
<item>操作</item>
</string-array>
<string-array name="left_panel_first_group_names">
<item>新鲜事</item>
<item>消息</item>
<item>聊天</item>
<item>好友</item>
<item>找人</item>
</string-array>
<string-array name="left_panel_second_group_names">
<item>附近</item>
<item>公共主页</item>
<item>热门分享</item>
<item>应用与游戏</item>
</string-array>
<string-array name="left_panel_group_three_names">
<item>选项</item>
<item>注销登录</item>
</string-array>
<string-array name="fresh_news_filter_list">
<item>新鲜事</item>
<item>好友内容</item>
<item>特别关注</item>
<item>状态</item>
<item>照片</item>
<item>位置</item>
<item>分享</item>
<item>日志</item>
</string-array>
<string name="xlistview_header_hint_normal">下拉刷新</string>
<string name="xlistview_header_hint_ready">松开刷新数据</string>
<string name="xlistview_header_hint_loading">正在加载</string>
<string name="xlistview_header_last_time">上次更新时间：</string>
<string name="xlistview_footer_hint_normal">查看更多</string>
<string name="xlistview_footer_hint_ready">松开载入更多</string>
</resources>
开源组件XListView的demo的下载地址：https://github.com/Maxwin-z/XListView-Android (大家到这个网址去下载吧，我试过了没问题可以下载的。之前我上传的有网友说下载下来不全，我试图再次上传，几次上传都以失败告终。之前不全的资源也删不了，CSDN的上传资源貌似有问题，每次传到百分之XX就不动了，无语)
这一篇就聊到这里了，好久不写博客，手有些生疏了，讲的不到位的请大家谅解。前段时间公司的事比较多，就没有更新博客，后面我会继续更新的，谢谢大家的关注。