拉刷新和loadmore列表视图，如Facebook [英] pull to refresh and loadmore listview like facebook
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问题描述
在这里我使用的滑动抽屉。在上点击主页图标它显示了3个标签
1）我应该申请标签这概念？
2）我想申请 pulltoreferesh 和 loadmore 在列表视图，如Facebook？
在你还看到，滚动起来的进度时，得到隐藏，并要求得到解除。
解决方案
公共类ListDemo扩展片段{
ArrayAdapter＆LT;字符串＆GT;文件;
私人链表＆LT;字符串＆GT; mListItems;
PullAndLoadListView LYT;
// ListView控件LV1;
//中的数据将被显示在ListView
私有String [] mNames = {法比安，卡洛斯，亚历克斯，安德烈，卡拉，
弗雷迪，拉扎罗，赫克托，州，埃德温，为Jhon
Edelmira，安德烈斯};
//中的数据将被显示在ListView
私有String [] mAnimals = {佩罗，小鲨鱼，Oveja，ELEFANTE，佩斯，
Nicuro，Bocachico，Chucha，居里，顿，阿吉拉，
莱昂，Jirafa};
公共查看onCreateView（LayoutInflater充气，容器的ViewGroup，
捆绑savedInstanceState）{
super.onCreateView（充气，容器，savedInstanceState）;
最终的视图V = inflater.inflate（R.layout.tab_frag3_layout，集装箱，假）;
mListItems =新的LinkedList＆LT;字符串＆GT;（）;
mListItems.addAll（Arrays.asList（mNames））;
LYT =（PullAndLoadListView）v.findViewById（R.id.tab_frag3_listview1）;
如果（集装箱== NULL）{
返回null;
}
文件=新的ArrayAdapter＆LT;字符串＆GT;（getActivity（），android.R.layout.simple_list_item_1，mListItems）;
lyt.setAdapter（文件）;
lyt.setOnRefreshListener（新OnRefreshListener（）{
@覆盖
公共无效onRefresh（）{
// TODO自动生成方法存根
新PullToRefreshDataTask（）执行（）。
}
}）;
lyt.setOnLoadMoreListener（新OnLoadMoreListener（）{
@覆盖
公共无效onLoadMore（）{
// TODO自动生成方法存根
新LoadMoreDataTask（）执行（）;
}
}）;
返回伏;
}
私有类LoadMoreDataTask扩展的AsyncTask＆LT;虚空，虚空，虚空＆GT; {
@覆盖
保护无效doInBackground（虚空...... PARAMS）{
如果（isCancelled（））{
返回null;
}
//模拟一个后台任务
尝试 {
视频下载（1000）;
}赶上（InterruptedException异常E）{
}
的for（int i = 0; I＆LT; mAnimals.length;我++）
mListItems.add（mAnimals [I]）;
返回null;
}
@覆盖
保护无效onPostExecute（无效的结果）{
mListItems.add（补充后装载更多）;
//我们需要通知该数据已更改适配器
files.notifyDataSetChanged（）;
//调用onLoadMoreComplete当LoadMore任务，已完成
lyt.onLoadMoreComplete（）;
super.onPostExecute（结果）;
}
@覆盖
保护无效onCancelled（）{
//通知更多操作已完成的加载
lyt.onLoadMoreComplete（）;
}
}
私有类PullToRefreshDataTask扩展的AsyncTask＆LT;虚空，虚空，虚空＆GT; {
@覆盖
保护无效doInBackground（虚空...... PARAMS）{
如果（isCancelled（））{
返回null;
}
//模拟一个后台任务
尝试 {
视频下载（1000）;
}赶上（InterruptedException异常E）{
}
的for（int i = 0; I＆LT; mAnimals.length;我++）
mListItems.addFirst（mAnimals [I]）;
返回null;
}
@覆盖
保护无效onPostExecute（无效的结果）{
mListItems.addFirst（加拉刷新后）;
//我们需要通知该数据已更改适配器
files.notifyDataSetChanged（）;
//调用onLoadMoreComplete当LoadMore任务，已完成
lyt.onRefreshComplete（）;
super.onPostExecute（结果）;
}
@覆盖
保护无效onCancelled（）{
//通知更多操作已完成的加载
lyt.onLoadMoreComplete（）;
}
}
}
这里是拉来刷新和负载更多的库。
here i am using sliding drawer. in that on click home icon it shows 3 tabs
1) which concept should i apply for tab ?
2) I want to apply pulltoreferesh and loadmore in listview like facebook ?
in that you have also seen that when scrolling up progressbar gets hide and request get cancel.
解决方案
public class ListDemo extends Fragment{
ArrayAdapter<String> files;
private LinkedList<String> mListItems;
PullAndLoadListView lyt ;
// ListView lv1;
// The data to be displayed in the ListView
private String[] mNames = { "Fabian", "Carlos", "Alex", "Andrea", "Karla",
"Freddy", "Lazaro", "Hector", "Carolina", "Edwin", "Jhon",
"Edelmira", "Andres" };
// The data to be displayed in the ListView
private String[] mAnimals = { "Perro", "Gato", "Oveja", "Elefante", "Pez",
"Nicuro", "Bocachico", "Chucha", "Curie", "Raton", "Aguila",
"Leon", "Jirafa" };
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
super.onCreateView(inflater, container, savedInstanceState);
final View v = inflater.inflate(R.layout.tab_frag3_layout, container, false);
mListItems = new LinkedList<String>();
mListItems.addAll(Arrays.asList(mNames));
lyt = (PullAndLoadListView)v.findViewById(R.id.tab_frag3_listview1);
if (container == null) {
return null;
}
files = new ArrayAdapter<String>(getActivity(),android.R.layout.simple_list_item_1,mListItems);
lyt.setAdapter(files);
lyt.setOnRefreshListener(new OnRefreshListener() {
@Override
public void onRefresh() {
// TODO Auto-generated method stub
new PullToRefreshDataTask().execute();
}
});
lyt.setOnLoadMoreListener(new OnLoadMoreListener() {
@Override
public void onLoadMore() {
// TODO Auto-generated method stub
new LoadMoreDataTask().execute();
}
});
return v;
}
private class LoadMoreDataTask extends AsyncTask<Void, Void, Void> {
@Override
protected Void doInBackground(Void... params) {
if (isCancelled()) {
return null;
}
// Simulates a background task
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
}
for (int i = 0; i < mAnimals.length; i++)
mListItems.add(mAnimals[i]);
return null;
}
@Override
protected void onPostExecute(Void result) {
mListItems.add("Added after load more");
// We need notify the adapter that the data have been changed
files.notifyDataSetChanged();
// Call onLoadMoreComplete when the LoadMore task, has finished
lyt.onLoadMoreComplete();
super.onPostExecute(result);
}
@Override
protected void onCancelled() {
// Notify the loading more operation has finished
lyt.onLoadMoreComplete();
}
}
private class PullToRefreshDataTask extends AsyncTask<Void, Void, Void> {
@Override
protected Void doInBackground(Void... params) {
if (isCancelled()) {
return null;
}
// Simulates a background task
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
}
for (int i = 0; i < mAnimals.length; i++)
mListItems.addFirst(mAnimals[i]);
return null;
}
@Override
protected void onPostExecute(Void result) {
mListItems.addFirst("Added after pull to refresh");
// We need notify the adapter that the data have been changed
files.notifyDataSetChanged();
// Call onLoadMoreComplete when the LoadMore task, has finished
lyt.onRefreshComplete();
super.onPostExecute(result);
}
@Override
protected void onCancelled() {
// Notify the loading more operation has finished
lyt.onLoadMoreComplete();
}
}
}
here is source code of pull-to-refresh and load-more library.
这篇关于拉刷新和loadmore列表视图，如Facebook的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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