fragment、ListFragment使用ListView及自定义Listview等初始化操作
fragment、ListFragment使用ListView及自定义Listview等初始化操作
1.先说一下 从官方api中说fragment碎片中使用Listview有专门的 ListView碎片-> ListFragment 而不能继承Fragment
官方api相关连接：http://developer.android.com/guide/components/fragments.html
2.不废话直接上代码，这是我项目种的代码 2.1版本同样适用
父类封装：
public class BaseListFragment extends ListFragment { public Map<String, String> map; public String tag = this.getClass().getSimpleName(); // tag 用于测试log用 public Context context; // 存储上下文对象 public Activity activity; // 存储上下文对象 @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); context = getActivity(); activity = getActivity(); } }
子类实现：
/** * 新闻分类页面 * @author chen * @date 2012-12-18 下午5:48:02 */ public class NewsFragment extends BaseListFragment { /** 请求url */ private String url; /** ListView */ private PullListView mListView; // /** 分页 */ // private Page page = new Page(); /** 商铺适配器 */ private Adapter mAdapter = new Adapter(activity);; /** 集合数据 */ public ArrayList<News> mListData; /** 是否重新加载 */ private boolean isClear; private LayoutInflater mInflater; /** 新闻详细页面 url */ private String detailUrl = C.http.http_news_detail; public NewsFragment(){} public NewsFragment(Context context, String url) { this.context = context; this.url = url; mListData = null; } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); Log.i(tag, "onCreate"); } // 加载多次 public void onActivityCreated(Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); Log.i(tag, "onActivityCreated"); mListView = (PullListView) getListView();//(ListView) activity.findViewById(android.R.id.list); if(mListData != null && mListData.size() > 0) { return; } mListData = new ArrayList<News>(); setListAdapter(mAdapter); mListView.onRefreshComplete(); mListView.setonRefreshListener(new OnRefreshListener() { public void onRefresh() { isClear = true; // 初始化数据 AnsynHttpRequest.requestByGet(context, callbackData, R.string.http_news, url, true, true, true); } }); // 初始化数据 AnsynHttpRequest.requestByGet(context, callbackData, R.string.http_news, url, true, true, false); } // 加载多次 @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { super.onCreateView(inflater, container, savedInstanceState); View view = inflater.inflate(R.layout.fragment_news_or_hotline, container, false); mInflater = inflater; Log.i(tag, "onCreateView"); return view; } @Override public void onStart() { Log.i(tag, "onStart"); super.onStart(); } @Override public void onStop() { super.onStop(); Log.i(tag, "onStop"); } @Override public void onDestroy() { super.onDestroy(); Log.i(tag, "onDestroy"); } /** * 异步回调回来并处理数据 */ private ObserverCallBack callbackData = new ObserverCallBack(){ public void back(String data, int url) { Message msg = new Message(); switch (url) { case R.string.http_news: // 解析主题信息数据 msg = new Message(); if(data == null) { msg.what = 2; mHandler.sendMessage(msg); return; } try { News news = new News(); ArrayList<News> dataInfo = news.getListInfo(data); if(isClear) { if(dataInfo != null && dataInfo.size()>0) mListData.clear(); isClear = false; } if(mListData != null && mListData.size() > 0) msg.what = 1; else msg.what = 0; if(dataInfo == null || dataInfo.size() == 0){ if( mListData != null && mListData.size() > 0){ msg = new Message(); msg.what = 2; mHandler.sendMessage(msg); return; } } else { mListData.addAll(dataInfo); } mHandler.sendMessage(msg); } catch (Exception e) { e.printStackTrace(); } break; case R.string.http_news_detail: msg = new Message(); if(data == null) { msg.what = 2; mHandler.sendMessage(msg); return; } try { NewsDetail newsDetail = new NewsDetail(); newsDetail = newsDetail.getInfo(data, detailUrl); msg.what = 3; msg.obj = newsDetail; if(newsDetail.content == null || newsDetail.content.length() == 0){ msg = new Message(); msg.what = 2; mHandler.sendMessage(msg); return; } mHandler.sendMessage(msg); } catch (Exception e) { msg = new Message(); msg.what = 2; mHandler.sendMessage(msg); } break; default: break; } }; }; private Handler mHandler = new Handler(){ @Override public void handleMessage(Message msg) { super.handleMessage(msg); switch (msg.what) { case 0: mAdapter.notifyDataSetChanged(); mListView.onRefreshComplete(); // if(mListData.size() == 0){ //// Toast.makeText(context, R.string.dialog_title_nowData, Toast.LENGTH_LONG).show(); // mListView.setVisibility(View.GONE); // } else mListView.setVisibility(View.VISIBLE); break; case 1: mAdapter.notifyDataSetChanged(); // if(mListData.size() == 0){ //// Toast.makeText(context, R.string.dialog_title_nowData, Toast.LENGTH_LONG).show(); // mListView.setVisibility(View.GONE); // }else mListView.setVisibility(View.VISIBLE); break; case 2: Toast.makeText(context, R.string.no_data, Toast.LENGTH_LONG).show(); break; case 3: NewsDetail newsDetail = (NewsDetail) msg.obj; Intent intent = new Intent(context, NewsDetailActivity.class); intent.putExtra("content", newsDetail.content); intent.putExtra("hostUrl", newsDetail.hostUrl); startActivity(intent); break; default: break; } } }; public final class ViewHolder { public TextView title; public TextView time; } // 添加列表内容 public class Adapter extends BaseAdapter { public Adapter(){} @Override public boolean areAllItemsEnabled() { return super.areAllItemsEnabled(); } public Adapter(Context context) { } @Override public int getCount() { return mListData.size(); } @Override public Object getItem(int position) { return null; } @Override public long getItemId(int position) { return position; } @Override public View getView(final int position, View convertView, ViewGroup parent) { final News news = mListData.get(position); ViewHolder holder = null; if (convertView == null) { holder = new ViewHolder(); convertView = mInflater.inflate(R.layout.list_item_mian, null); holder.title = (TextView) convertView.findViewById(R.id.list_main_txt_title); holder.time = (TextView) convertView.findViewById(R.id.list_main_txt_time); convertView.setTag(holder); } else { holder = (ViewHolder) convertView.getTag(); } // 进行数据设置 holder.title.setText(news.title); holder.time.setText(news.time); convertView.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // 加载详细新闻 detailUrl = mListData.get(position).childUrl; AnsynHttpRequest.requestByGet(context, callbackData, R.string.http_news_detail, detailUrl, true, true, false); } }); return convertView; } } }
layout 如下：里面引用的是网上找的自定义下拉上啦刷新 可自行去找
<?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:orientation="vertical" > <com.vv.apps.hua.app.base.view.PullListView android:id="@android:id/list" android:layout_width="fill_parent" android:layout_height="fill_parent" android:cacheColorHint="@color/transparent" android:divider="@null" android:dividerHeight="0dp" android:fastScrollEnabled="true" android:focusable="true" /> </LinearLayout>
