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] view
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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] view
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/**

* 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;

}

}

}