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(转摘)Android腾讯微博客户端开发五:利用FootView实现ListView滑动动态加载实现分页

热度：85   发布时间：2016-05-01 18:43:57.0
(转摘)Android腾讯微博客户端开发5:利用FootView实现ListView滑动动态加载实现分页
这张图片左边部分和右边部分还是有很大的不同，不是指内容上，是指布局上，左边的是我今天写这次代码之前的布局，root是用的RelativeLayout，右边是用的FrameLayout，体现在界面上就是右边的list内容可以顶到最上面，而左边的list是在上面的topBar下面。


看布局代码：布局代码还用到了include，主要是用来重用布局的。
Java代码 复制代码?收藏代码
  1. <?xml?version="1.0"?encoding="utf-8"?> ??
  2. <FrameLayout?xmlns:android="http://schemas.android.com/apk/res/android"?android:layout_width="fill_parent"?android:layout_height="fill_parent"> ??
  3. ????<LinearLayout?android:orientation="vertical"?android:background="#ffffffff"?android:layout_width="fill_parent"?android:layout_height="fill_parent"> ??
  4. ????????<ListView?android:id="@id/android:list"?android:paddingTop="45.0dip"?android:paddingBottom="50.0dip"?android:layout_width="fill_parent"?android:cacheColorHint="#00000000"?android:fadingEdge="none"?android:fastScrollEnabled="false"?android:clipToPadding="false"??
  5. ????????????android:layout_height="wrap_content"?android:divider="@drawable/list_divider"/> ??
  6. ????????<TextView?android:text=""?android:textSize="20.0sp"?android:textColor="#ff5a5a5a"?android:gravity="center_horizontal"?android:layout_width="fill_parent"?android:layout_height="wrap_content"?android:paddingTop="15.0dip"?android:visibility="invisible"/> ??
  7. ????</LinearLayout> ??
  8. ????<include?android:id="@+id/home_top"?layout="@layout/top_panel"?android:layout_width="fill_parent"?android:layout_height="wrap_content"?/> ??
  9. </FrameLayout>??
<?xml version="1.0" encoding="utf-8"?><FrameLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent">	<LinearLayout android:orientation="vertical" android:background="#ffffffff" android:layout_width="fill_parent" android:layout_height="fill_parent">		<ListView android:id="@id/android:list" android:paddingTop="45.0dip" android:paddingBottom="50.0dip" android:layout_width="fill_parent" android:cacheColorHint="#00000000" android:fadingEdge="none" android:fastScrollEnabled="false" android:clipToPadding="false"			android:layout_height="wrap_content" android:divider="@drawable/list_divider"/>		<TextView android:text="" android:textSize="20.0sp" android:textColor="#ff5a5a5a" android:gravity="center_horizontal" android:layout_width="fill_parent" android:layout_height="wrap_content" android:paddingTop="15.0dip" android:visibility="invisible"/>	</LinearLayout>	<include android:id="@+id/home_top" layout="@layout/top_panel" android:layout_width="fill_parent" android:layout_height="wrap_content" /></FrameLayout>

把图片往下拉，此时还未到加载到数据的最底部。

继续往下拉，ok，见底了，看到更多的提示了嘛，点击他


出现进度条提示

加载完毕之后显示新的一页，继续往下拉，又会看见更多提示，然后如此循环。主要是利用了隐藏。


下面看看主的Activity的代码：

Java代码 复制代码?收藏代码
  1. public?class?HomeTimeLineActivity?extends?ListActivity?implements?OnItemClickListener,OnItemLongClickListener{ ??
  2. ???? ??
  3. ????private?DataHelper?dataHelper; ??
  4. ????private?UserInfo?user; ??
  5. ????private?MyWeiboSync?weibo; ??
  6. ????private?ListView?listView; ??
  7. ????private?HomeAdapter?adapter; ??
  8. ????private?JSONArray?array; ??
  9. ????private?AsyncImageLoader?asyncImageLoader; ??
  10. ????private?Handler?handler; ??
  11. ????private?ProgressDialog?progressDialog; ??
  12. ????private?View?top_panel; ??
  13. ????private?Button?top_btn_left; ??
  14. ????private?Button?top_btn_right; ??
  15. ????private?TextView?top_title; ??
  16. ????private?LinearLayout?list_footer; ??
  17. ????private?TextView?tv_msg; ??
  18. ????private?LinearLayout?loading; ??
  19. ????private?List<JSONObject>?list;//微博数据列表 ??
  20. ????private?ExecutorService?executorService; ??
  21. ????private?static?int?PAGE_SIZE?=?5;//每页显示的微博条数 ??
  22. ????private?int?TOTAL_PAGE?=?0;//当前已经记在的微博页数 ??
  23. ????private?static?int?THREADPOOL_SIZE?=?5;//线程池的大小 ??
  24. ???? ??
  25. ????@Override??
  26. ????protected?void?onCreate(Bundle?savedInstanceState)?{ ??
  27. ????????super.onCreate(savedInstanceState); ??
  28. ????????setContentView(R.layout.home); ??
  29. ????????setUpViews(); ??
  30. ????????setUpListeners(); ??
  31. ???????? ??
  32. ????????dataHelper?=?DataBaseContext.getInstance(getApplicationContext()); ??
  33. ????????weibo?=?WeiboContext.getInstance(); ??
  34. ???????? ??
  35. ????????List<UserInfo>?userList?=?dataHelper.GetUserList(false); ??
  36. ???????? ??
  37. ????????SharedPreferences?preferences?=?getSharedPreferences("default_user",Activity.MODE_PRIVATE); ??
  38. ????????String?nick?=?preferences.getString("user_default_nick",?"");//取得默认账号信息 ??
  39. ???????? ??
  40. ????????if?(nick?!=?"")?{ ??
  41. ????????????user?=?dataHelper.getUserByName(nick,userList); ??
  42. ????????????top_title.setText(nick);//顶部工具栏昵称 ??
  43. ????????} ??
  44. ???????? ??
  45. ????????weibo.setAccessTokenKey(user.getToken()); ??
  46. ????????weibo.setAccessTokenSecrect(user.getTokenSecret()); ??
  47. ???????? ??
  48. ????????progressDialog?=?new?ProgressDialog(HomeTimeLineActivity.this);//?生成一个进度条 ??
  49. ????????progressDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER); ??
  50. ????????progressDialog.setTitle("请稍等"); ??
  51. ????????progressDialog.setMessage("正在读取数据中!"); ??
  52. ????????handler?=?new?GetHomeTimeLineHandler(); ??
  53. ???????? ??
  54. ????????executorService.submit(new?GetHomeTimeLineThread());//耗时操作,开启一个新线程获取数据 ??
  55. ????????progressDialog.show(); ??
  56. ????} ??
  57. ???? ??
  58. ????private?void?setUpViews(){ ??
  59. ????????list_footer?=?(LinearLayout)LayoutInflater.from(HomeTimeLineActivity.this).inflate(R.layout.list_footer,?null); ??
  60. ????????tv_msg?=?(TextView)list_footer.findViewById(R.id.tv_msg); ??
  61. ????????loading?=?(LinearLayout)list_footer.findViewById(R.id.loading); ??
  62. ????????listView?=?getListView(); ??
  63. ????????top_panel?=?(View)findViewById(R.id.home_top); ??
  64. ????????top_btn_left?=?(Button)top_panel.findViewById(R.id.top_btn_left); ??
  65. ????????top_btn_right?=?(Button)top_panel.findViewById(R.id.top_btn_right); ??
  66. ????????top_title?=?(TextView)top_panel.findViewById(R.id.top_title); ??
  67. ????????listView.addFooterView(list_footer);//这儿是关键中的关键呀，利用FooterVIew分页动态加载 ??
  68. ????????list?=?new?ArrayList<JSONObject>(); ??
  69. ????????executorService?=?Executors.newFixedThreadPool(THREADPOOL_SIZE); ??
  70. ????} ??
  71. ???? ??
  72. ????private?void?setUpListeners(){ ??
  73. ????????listView.setOnItemClickListener(this); ??
  74. ????????listView.setOnItemLongClickListener(this); ??
  75. ????????top_btn_right.setOnClickListener(new?OnClickListener()?{ ??
  76. ????????????@Override??
  77. ????????????public?void?onClick(View?v)?{ ??
  78. ????????????????Intent?intent?=?new?Intent(HomeTimeLineActivity.this,AddWeiboActivity.class); ??
  79. ????????????????startActivity(intent); ??
  80. ????????????} ??
  81. ????????}); ??
  82. ????????tv_msg.setOnClickListener(new?OnClickListener()?{ ??
  83. ????????????@Override??
  84. ????????????public?void?onClick(View?v)?{ ??
  85. ????????????????//Toast.makeText(HomeTimeLineActivity.this,?"我将消失了",?Toast.LENGTH_SHORT).show(); ??
  86. ????????????????executorService.submit(new?GetHomeTimeLineThread()); ??
  87. ????????????????tv_msg.setVisibility(View.GONE);//隐藏更多提示的TextView ??
  88. ????????????????loading.setVisibility(View.VISIBLE);//显示最下方的进度条 ??
  89. ????????????} ??
  90. ????????}); ??
  91. ????} ??
  92. ???? ??
  93. ????class?GetHomeTimeLineHandler?extends?Handler?{ ??
  94. ????????@Override??
  95. ????????public?void?handleMessage(Message?msg)?{ ??
  96. ????????????adapter?=?new?HomeAdapter(HomeTimeLineActivity.this,?list); ??
  97. ????????????listView.setAdapter(adapter); ??
  98. ????????????listView.setSelection((TOTAL_PAGE-1)*PAGE_SIZE+1);//设置最新获取一页数据成功后显示数据的起始数据 ??
  99. ????????????progressDialog.dismiss();//?关闭进度条 ??
  100. ????????????loading.setVisibility(View.GONE);//隐藏下方的进度条 ??
  101. ????????????tv_msg.setVisibility(View.VISIBLE);//显示出更多提示TextView ??
  102. ????????} ??
  103. ????} ??
  104. ???? ??
  105. ????class?GetHomeTimeLineThread?extends?Thread?{ ??
  106. ????????@Override??
  107. ????????public?void?run()?{ ??
  108. ????????????refreshList(); ??
  109. ????????????Message?msg?=?handler.obtainMessage();//通知线程来处理范围的数据 ??
  110. ????????????handler.sendMessage(msg); ??
  111. ????????} ??
  112. ????} ??
  113. ???? ??
  114. ????private?void?refreshList(){ ??
  115. ????????String?jsonStr?=?weibo.getHomeMsg(weibo.getAccessTokenKey(),?weibo.getAccessTokenSecrect(),?PageFlag.PageFlag_First,?(TOTAL_PAGE+1)*PAGE_SIZE); ??
  116. ????????try?{ ??
  117. ????????????JSONObject?dataObj?=?new?JSONObject(jsonStr).getJSONObject("data"); ??
  118. ????????????array?=?dataObj.getJSONArray("info"); ??
  119. ????????????if(array!=null&&array.length()>0){ ??
  120. ????????????????TOTAL_PAGE++; ??
  121. ????????????????list.clear(); ??
  122. ????????????????int?lenth?=array.length(); ??
  123. ????????????????for(int?i?=?0;i<lenth;i++){ ??
  124. ????????????????????list.add(array.optJSONObject(i)); ??
  125. ????????????????} ??
  126. ????????????} ??
  127. ????????}?catch?(JSONException?e)?{ ??
  128. ????????????e.printStackTrace(); ??
  129. ????????} ??
  130. ????} ??
  131. ???? ??
  132. ???? ??
  133. ????class?HomeAdapter?extends?BaseAdapter?{ ??
  134. ????????private?Context?context; ??
  135. ????????private?LayoutInflater?inflater; ??
  136. ????????private?List<JSONObject>?list; ??
  137. ???????? ??
  138. ????????public?HomeAdapter(Context?context,?List<JSONObject>?list)?{ ??
  139. ????????????super(); ??
  140. ????????????this.context?=?context; ??
  141. ????????????this.list?=?list; ??
  142. ????????????this.inflater?=?LayoutInflater.from(context); ??
  143. ????????} ??
  144. ??
  145. ????????@Override??
  146. ????????public?int?getCount()?{ ??
  147. ????????????return?list.size(); ??
  148. ????????} ??
  149. ??
  150. ????????@Override??
  151. ????????public?Object?getItem(int?position)?{ ??
  152. ????????????return?list.get(position); ??
  153. ????????} ??
  154. ??
  155. ????????@Override??
  156. ????????public?long?getItemId(int?position)?{ ??
  157. ????????????return?position; ??
  158. ????????} ??
  159. ??
  160. ????????@Override??
  161. ????????public?View?getView(final?int?position,?View?convertView,?ViewGroup?parent)?{ ??
  162. ????????????asyncImageLoader?=?new?AsyncImageLoader(); ??
  163. ????????????HomeViewHolder?viewHolder?=?new?HomeViewHolder(); ??
  164. ????????????JSONObject?data?=?(JSONObject)list.get(position); ??
  165. ????????????JSONObject?source?=?null; ??
  166. ????????????convertView?=?inflater.inflate(R.layout.home_list_item,?null); ??
  167. ????????????try?{ ??
  168. ????????????????source?=?data.getJSONObject("source"); ??
  169. ????????????}?catch?(JSONException?e1)?{ ??
  170. ????????????????e1.printStackTrace();? ??
  171. ????????????} ??
  172. ????????????viewHolder.home_headicon?=?(ImageView)?convertView.findViewById(R.id.home_headicon); ??
  173. ????????????viewHolder.home_nick?=?(TextView)?convertView.findViewById(R.id.home_nick); ??
  174. ????????????viewHolder.home_hasimage?=?(ImageView)?convertView.findViewById(R.id.home_hasimage); ??
  175. ????????????viewHolder.home_timestamp?=?(TextView)?convertView.findViewById(R.id.home_timestamp); ??
  176. ????????????viewHolder.home_origtext?=?(TextView)?convertView.findViewById(R.id.home_origtext); ??
  177. ????????????viewHolder.home_source?=?(TextView)?convertView.findViewById(R.id.home_source); ??
  178. ???????????? ??
  179. ????????????if(data!=null){ ??
  180. ????????????????try?{ ??
  181. ????????????????????convertView.setTag(data.get("id")); ??
  182. ????????????????????//viewHolder.home_headicon.setImageDrawable(ImageUtil.getDrawableFromUrl(data.getString("head")+"/100"));//同步加载图片 ??
  183. ????????????????????viewHolder.home_nick.setText(data.getString("nick")); ??
  184. ????????????????????viewHolder.home_timestamp.setText(TimeUtil.converTime(Long.parseLong(data.getString("timestamp")))); ??
  185. ????????????????????//viewHolder.home_origtext.setText(data.getString("origtext"),?TextView.BufferType.SPANNABLE); ??
  186. ???????????????????? ??
  187. ????????????????????/*Spannable?spannable?=?(Spannable)viewHolder.home_origtext.getText();//加高亮显示 ?
  188. ????????????????????spannable.setSpan(new?BackgroundColorSpan(Color.RED),?0,?1,?Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);*/??
  189. ???????????????????? ??
  190. ????????????????????SpannableString?spannable?=?new?SpannableString(data.getString("origtext")); ??
  191. ????????????????????//把字符串解析成本地表情 ??
  192. ????????????????????spannable?=?TextUtil.getImageSpannableString(spannable,?RegexUtil.getStartAndEndIndex(data.getString("origtext"),?Pattern.compile("\\/[\u4e00-\u9fa5a-zA-Z]{1,3}")),?getResources()); ??
  193. ????????????????????viewHolder.home_origtext.setText(spannable); ??
  194. ???????????????????? ??
  195. ???????????????????? ??
  196. ????????????????????if(source!=null){ ??
  197. ????????????????????????viewHolder.home_source.setText(source.getString("nick")+":"+source.getString("origtext")); ??
  198. ????????????????????????viewHolder.home_source.setBackgroundResource(R.drawable.home_source_bg); ??
  199. ????????????????????} ??
  200. ????????????????????//异步加载图片 ??
  201. ????????????????????Drawable?cachedImage?=?asyncImageLoader.loadDrawable(data.getString("head")+"/100",viewHolder.home_headicon,?new?ImageCallback(){ ??
  202. ????????????????????????@Override??
  203. ????????????????????????public?void?imageLoaded(Drawable?imageDrawable,ImageView?imageView,?String?imageUrl)?{ ??
  204. ????????????????????????????imageView.setImageDrawable(imageDrawable); ??
  205. ????????????????????????} ??
  206. ????????????????????}); ??
  207. ????????????????????if?(cachedImage?==?null)?{ ??
  208. ????????????????????????viewHolder.home_headicon.setImageResource(R.drawable.icon); ??
  209. ????????????????????}?else?{ ??
  210. ????????????????????????viewHolder.home_headicon.setImageDrawable(cachedImage); ??
  211. ????????????????????} ??
  212. ????????????????????if(data.getJSONArray("image")!=null){ ??
  213. ????????????????????????viewHolder.home_hasimage.setImageResource(R.drawable.hasimage); ??
  214. ????????????????????} ??
  215. ????????????????}?catch?(JSONException?e)?{ ??
  216. ????????????????????e.printStackTrace(); ??
  217. ????????????????}?catch?(Exception?e)?{ ??
  218. ????????????????????e.printStackTrace(); ??
  219. ????????????????} ??
  220. ????????????} ??
  221. ????????????return?convertView; ??
  222. ????????} ??
  223. ????} ??
  224. ???? ??
  225. ????static?class?HomeViewHolder?{ ??
  226. ????????private?ImageView?home_headicon; ??
  227. ????????private?TextView?home_nick; ??
  228. ????????private?TextView?home_timestamp; ??
  229. ????????private?TextView?home_origtext; ??
  230. ????????private?TextView?home_source; ??
  231. ????????private?ImageView?home_hasimage; ??
  232. ????} ??
  233. ??
  234. ????@Override??
  235. ????public?boolean?onItemLongClick(AdapterView<?>?arg0,?View?arg1,?int?position,long?arg3)?{ ??
  236. ????????CharSequence?[]?items?=?null; ??
  237. ????????try?{ ??
  238. ????????????items=?new?CharSequence[]{"转播","对话","点评","收藏",((JSONObject)array.opt(position)).getString("nick"),"取消"}; ??
  239. ????????}?catch?(JSONException?e)?{ ??
  240. ????????????e.printStackTrace(); ??
  241. ????????} ??
  242. ????????new?AlertDialog.Builder(HomeTimeLineActivity.this).setTitle("选项").setItems(items,new?DialogInterface.OnClickListener()?{ ??
  243. ????????????@Override??
  244. ????????????public?void?onClick(DialogInterface?dialog,?int?which)?{ ??
  245. ????????????????????????switch?(which)?{ ??
  246. ????????????????????????case?0:?{ ??
  247. ????????????????????????} ??
  248. ????????????????????????????break; ??
  249. ????????????????????????case?1:?{ ??
  250. ????????????????????????} ??
  251. ????????????????????????????break; ??
  252. ????????????????????????case?2:?{ ??
  253. ????????????????????????} ??
  254. ????????????????????????????break; ??
  255. ????????????????????????case?3:?{ ??
  256. ????????????????????????} ??
  257. ????????????????????????????break; ??
  258. ????????????????????????case?4:?{ ??
  259. ????????????????????????} ??
  260. ????????????????????????????break; ??
  261. ????????????????????????case?5:?{ ??
  262. ????????????????????????} ??
  263. ????????????????????????????break; ??
  264. ????????????????????????default: ??
  265. ????????????????????????????break; ??
  266. ????????????????????????} ??
  267. ????????????} ??
  268. ????????}).show(); ??
  269. ????????return?false; ??
  270. ????} ??
  271. ??
  272. ????@Override??
  273. ????public?void?onItemClick(AdapterView<?>?arg0,?View?arg1,?int?position,?long?arg3)?{ ??
  274. ????????JSONObject?weiboInfo?=?(JSONObject)array.opt(position); ??
  275. ????????Intent?intent?=?new?Intent(HomeTimeLineActivity.this,?WeiboDetailActivity.class); ??
  276. ????????try?{ ??
  277. ????????????intent.putExtra("weiboid",?weiboInfo.getString("id")); ??
  278. ????????????startActivity(intent); ??
  279. ????????}?catch?(JSONException?e)?{ ??
  280. ????????????e.printStackTrace(); ??
  281. ????????} ??
  282. ????} ??
  283. ???? ??
  284. ????@Override??
  285. ????public?boolean?onCreateOptionsMenu(Menu?menu){ ??
  286. ????????super.onCreateOptionsMenu(menu); ??
  287. ????????MenuInflater?menuInflater?=?getMenuInflater(); ??
  288. ????????menuInflater.inflate(R.menu.home_timeline_menu,?menu); ??
  289. ????????return?true; ??
  290. ????} ??
  291. ???? ??
  292. ????@Override??
  293. ????public?boolean?onOptionsItemSelected(MenuItem?item)?{ ??
  294. ????????switch?(item.getItemId())?{ ??
  295. ????????case?R.id.menu_settings:?{ ??
  296. ??
  297. ????????} ??
  298. ????????????break; ??
  299. ????????case?R.id.menu_official:?{ ??
  300. ??
  301. ????????} ??
  302. ????????????break; ??
  303. ????????case?R.id.menu_feedback:?{ ??
  304. ??
  305. ????????} ??
  306. ????????????break; ??
  307. ????????case?R.id.menu_account:?{ ??
  308. ????????????Intent?intent?=?new?Intent(HomeTimeLineActivity.this, ??
  309. ????????????????????AccountActivity.class); ??
  310. ????????????startActivity(intent); ??
  311. ????????} ??
  312. ????????????break; ??
  313. ????????case?R.id.menu_about:?{ ??
  314. ????????????Intent?intent?=?new?Intent(HomeTimeLineActivity.this, ??
  315. ????????????????????AddWeiboActivity.class); ??
  316. ????????????startActivity(intent); ??
  317. ????????} ??
  318. ????????????break; ??
  319. ????????case?R.id.menu_quit:?{ ??
  320. ??
  321. ????????} ??
  322. ????????????break; ??
  323. ????????default: ??
  324. ????????????break; ??
  325. ????????} ??
  326. ????????return?true; ??
  327. ????} ??
  328. }??
public class HomeTimeLineActivity extends ListActivity implements OnItemClickListener,OnItemLongClickListener{		private DataHelper dataHelper;	private UserInfo user;	private MyWeiboSync weibo;	private ListView listView;	private HomeAdapter adapter;	private JSONArray array;	private AsyncImageLoader asyncImageLoader;	private Handler handler;	private ProgressDialog progressDialog;	private View top_panel;	private Button top_btn_left;	private Button top_btn_right;	private TextView top_title;	private LinearLayout list_footer;	private TextView tv_msg;	private LinearLayout loading;	private List<JSONObject> list;//微博数据列表	private ExecutorService executorService;	private static int PAGE_SIZE = 5;//每页显示的微博条数	private int TOTAL_PAGE = 0;//当前已经记在的微博页数	private static int THREADPOOL_SIZE = 5;//线程池的大小		@Override	protected void onCreate(Bundle savedInstanceState) {		super.onCreate(savedInstanceState);		setContentView(R.layout.home);		setUpViews();		setUpListeners();				dataHelper = DataBaseContext.getInstance(getApplicationContext());		weibo = WeiboContext.getInstance();				List<UserInfo> userList = dataHelper.GetUserList(false);				SharedPreferences preferences = getSharedPreferences("default_user",Activity.MODE_PRIVATE);		String nick = preferences.getString("user_default_nick", "");//取得默认账号信息				if (nick != "") {			user = dataHelper.getUserByName(nick,userList);			top_title.setText(nick);//顶部工具栏昵称		}				weibo.setAccessTokenKey(user.getToken());		weibo.setAccessTokenSecrect(user.getTokenSecret());				progressDialog = new ProgressDialog(HomeTimeLineActivity.this);// 生成一个进度条		progressDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);		progressDialog.setTitle("请稍等");		progressDialog.setMessage("正在读取数据中!");		handler = new GetHomeTimeLineHandler();				executorService.submit(new GetHomeTimeLineThread());//耗时操作,开启一个新线程获取数据		progressDialog.show();	}		private void setUpViews(){		list_footer = (LinearLayout)LayoutInflater.from(HomeTimeLineActivity.this).inflate(R.layout.list_footer, null);		tv_msg = (TextView)list_footer.findViewById(R.id.tv_msg);		loading = (LinearLayout)list_footer.findViewById(R.id.loading);		listView = getListView();		top_panel = (View)findViewById(R.id.home_top);		top_btn_left = (Button)top_panel.findViewById(R.id.top_btn_left);		top_btn_right = (Button)top_panel.findViewById(R.id.top_btn_right);		top_title = (TextView)top_panel.findViewById(R.id.top_title);		listView.addFooterView(list_footer);//这儿是关键中的关键呀，利用FooterVIew分页动态加载		list = new ArrayList<JSONObject>();		executorService = Executors.newFixedThreadPool(THREADPOOL_SIZE);	}		private void setUpListeners(){		listView.setOnItemClickListener(this);		listView.setOnItemLongClickListener(this);		top_btn_right.setOnClickListener(new OnClickListener() {			@Override			public void onClick(View v) {				Intent intent = new Intent(HomeTimeLineActivity.this,AddWeiboActivity.class);				startActivity(intent);			}		});		tv_msg.setOnClickListener(new OnClickListener() {			@Override			public void onClick(View v) {				//Toast.makeText(HomeTimeLineActivity.this, "我将消失了", Toast.LENGTH_SHORT).show();				executorService.submit(new GetHomeTimeLineThread());				tv_msg.setVisibility(View.GONE);//隐藏更多提示的TextView				loading.setVisibility(View.VISIBLE);//显示最下方的进度条			}		});	}		class GetHomeTimeLineHandler extends Handler {		@Override		public void handleMessage(Message msg) {			adapter = new HomeAdapter(HomeTimeLineActivity.this, list);			listView.setAdapter(adapter);			listView.setSelection((TOTAL_PAGE-1)*PAGE_SIZE+1);//设置最新获取一页数据成功后显示数据的起始数据			progressDialog.dismiss();// 关闭进度条			loading.setVisibility(View.GONE);//隐藏下方的进度条			tv_msg.setVisibility(View.VISIBLE);//显示出更多提示TextView		}	}		class GetHomeTimeLineThread extends Thread {		@Override		public void run() {			refreshList();			Message msg = handler.obtainMessage();//通知线程来处理范围的数据			handler.sendMessage(msg);		}	}		private void refreshList(){		String jsonStr = weibo.getHomeMsg(weibo.getAccessTokenKey(), weibo.getAccessTokenSecrect(), PageFlag.PageFlag_First, (TOTAL_PAGE+1)*PAGE_SIZE);		try {			JSONObject dataObj = new JSONObject(jsonStr).getJSONObject("data");			array = dataObj.getJSONArray("info");			if(array!=null&&array.length()>0){				TOTAL_PAGE++;				list.clear();				int lenth =array.length();				for(int i = 0;i<lenth;i++){					list.add(array.optJSONObject(i));				}			}		} catch (JSONException e) {			e.printStackTrace();		}	}			class HomeAdapter extends BaseAdapter {		private Context context;		private LayoutInflater inflater;		private List<JSONObject> list;				public HomeAdapter(Context context, List<JSONObject> list) {			super();			this.context = context;			this.list = list;			this.inflater = LayoutInflater.from(context);		}		@Override		public int getCount() {			return list.size();		}		@Override		public Object getItem(int position) {			return list.get(position);		}		@Override		public long getItemId(int position) {			return position;		}		@Override		public View getView(final int position, View convertView, ViewGroup parent) {			asyncImageLoader = new AsyncImageLoader();			HomeViewHolder viewHolder = new HomeViewHolder();			JSONObject data = (JSONObject)list.get(position);			JSONObject source = null;			convertView = inflater.inflate(R.layout.home_list_item, null);			try {				source = data.getJSONObject("source");			} catch (JSONException e1) {				e1.printStackTrace(); 			}			viewHolder.home_headicon = (ImageView) convertView.findViewById(R.id.home_headicon);			viewHolder.home_nick = (TextView) convertView.findViewById(R.id.home_nick);			viewHolder.home_hasimage = (ImageView) convertView.findViewById(R.id.home_hasimage);			viewHolder.home_timestamp = (TextView) convertView.findViewById(R.id.home_timestamp);			viewHolder.home_origtext = (TextView) convertView.findViewById(R.id.home_origtext);			viewHolder.home_source = (TextView) convertView.findViewById(R.id.home_source);						if(data!=null){				try {					convertView.setTag(data.get("id"));					//viewHolder.home_headicon.setImageDrawable(ImageUtil.getDrawableFromUrl(data.getString("head")+"/100"));//同步加载图片					viewHolder.home_nick.setText(data.getString("nick"));					viewHolder.home_timestamp.setText(TimeUtil.converTime(Long.parseLong(data.getString("timestamp"))));					//viewHolder.home_origtext.setText(data.getString("origtext"), TextView.BufferType.SPANNABLE);										/*Spannable spannable = (Spannable)viewHolder.home_origtext.getText();//加高亮显示					spannable.setSpan(new BackgroundColorSpan(Color.RED), 0, 1, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);*/										SpannableString spannable = new SpannableString(data.getString("origtext"));					//把字符串解析成本地表情					spannable = TextUtil.getImageSpannableString(spannable, RegexUtil.getStartAndEndIndex(data.getString("origtext"), Pattern.compile("\\/[\u4e00-\u9fa5a-zA-Z]{1,3}")), getResources());					viewHolder.home_origtext.setText(spannable);															if(source!=null){						viewHolder.home_source.setText(source.getString("nick")+":"+source.getString("origtext"));						viewHolder.home_source.setBackgroundResource(R.drawable.home_source_bg);					}					//异步加载图片					Drawable cachedImage = asyncImageLoader.loadDrawable(data.getString("head")+"/100",viewHolder.home_headicon, new ImageCallback(){	                    @Override	                    public void imageLoaded(Drawable imageDrawable,ImageView imageView, String imageUrl) {	                        imageView.setImageDrawable(imageDrawable);	                    }	                });					if (cachedImage == null) {						viewHolder.home_headicon.setImageResource(R.drawable.icon);					} else {						viewHolder.home_headicon.setImageDrawable(cachedImage);					}					if(data.getJSONArray("image")!=null){						viewHolder.home_hasimage.setImageResource(R.drawable.hasimage);					}				} catch (JSONException e) {					e.printStackTrace();				} catch (Exception e) {					e.printStackTrace();				}			}			return convertView;		}	}		static class HomeViewHolder {		private ImageView home_headicon;		private TextView home_nick;		private TextView home_timestamp;		private TextView home_origtext;		private TextView home_source;		private ImageView home_hasimage;	}	@Override	public boolean onItemLongClick(AdapterView<?> arg0, View arg1, int position,long arg3) {		CharSequence [] items = null;		try {			items= new CharSequence[]{"转播","对话","点评","收藏",((JSONObject)array.opt(position)).getString("nick"),"取消"};		} catch (JSONException e) {			e.printStackTrace();		}		new AlertDialog.Builder(HomeTimeLineActivity.this).setTitle("选项").setItems(items,new DialogInterface.OnClickListener() {			@Override			public void onClick(DialogInterface dialog, int which) {						switch (which) {						case 0: {						}							break;						case 1: {						}							break;						case 2: {						}							break;						case 3: {						}							break;						case 4: {						}							break;						case 5: {						}							break;						default:							break;						}			}		}).show();		return false;	}	@Override	public void onItemClick(AdapterView<?> arg0, View arg1, int position, long arg3) {		JSONObject weiboInfo = (JSONObject)array.opt(position);		Intent intent = new Intent(HomeTimeLineActivity.this, WeiboDetailActivity.class);		try {			intent.putExtra("weiboid", weiboInfo.getString("id"));			startActivity(intent);		} catch (JSONException e) {			e.printStackTrace();		}	}		@Override	public boolean onCreateOptionsMenu(Menu menu){		super.onCreateOptionsMenu(menu);		MenuInflater menuInflater = getMenuInflater();		menuInflater.inflate(R.menu.home_timeline_menu, menu);		return true;	}		@Override	public boolean onOptionsItemSelected(MenuItem item) {		switch (item.getItemId()) {		case R.id.menu_settings: {		}			break;		case R.id.menu_official: {		}			break;		case R.id.menu_feedback: {		}			break;		case R.id.menu_account: {			Intent intent = new Intent(HomeTimeLineActivity.this,					AccountActivity.class);			startActivity(intent);		}			break;		case R.id.menu_about: {			Intent intent = new Intent(HomeTimeLineActivity.this,					AddWeiboActivity.class);			startActivity(intent);		}			break;		case R.id.menu_quit: {		}			break;		default:			break;		}		return true;	}}


下面的布局文件是你所看见的更多提示和下方的进度条布局文件：

Java代码 复制代码?收藏代码
  1. <?xml?version="1.0"?encoding="UTF-8"?> ??
  2. <LinearLayout?android:layout_width="fill_parent"?android:layout_height="wrap_content"?android:minHeight="?android:listPreferredItemHeight"??
  3. ??xmlns:android="http://schemas.android.com/apk/res/android"> ??
  4. ????<TextView?android:textSize="16.0sp"?android:textColor="#ff545454"?android:gravity="center"?android:id="@id/tv_msg"?android:layout_width="fill_parent"?android:layout_height="fill_parent"?android:text="更多"/> ??
  5. ????<LinearLayout?android:gravity="center"?android:layout_gravity="center"?android:orientation="horizontal"?android:id="@id/loading"?android:layout_width="fill_parent"?android:layout_height="fill_parent"> ??
  6. ????????<ProgressBar?android:layout_gravity="center_vertical"?android:id="@id/footprogress"?android:layout_width="wrap_content"?android:layout_height="wrap_content"?android:indeterminateBehavior="repeat"?style="?android:progressBarStyleSmallInverse"?/> ??
  7. ????????<TextView?android:textColor="#ff000000"?android:gravity="left|center"?android:padding="3.0px"?android:layout_width="wrap_content"?android:layout_height="wrap_content"?android:text="读取中"?/> ??
  8. ????</LinearLayout> ??
  9. </LinearLayout>??
  10. http://helloandroid.iteye.com/blog/1133545
1 楼 wenjundiandian 2011-12-28  
这个代码太多了，新手看懂有压力啊············不过是好东西      ···········
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