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：

[java]

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：

[java]

/** 
 * 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;  
        }  
    }  
}