pullfreshGrideview

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<com.handmark.pulltorefresh.library.PullToRefreshGridView
xmlns:ptr="http://schemas.android.com/apk/res-auto"
android:layout_height="match_parent"
android:layout_width="match_parent"
android:numColumns="2"
android:id="@+id/refresh_grid_view"
ptr:ptrDrawable="@drawable/default_ptr_flip"
ptr:ptrAnimationStyle="flip"
ptr:ptrHeaderBackground="#383838"
ptr:ptrHeaderTextColor="#FFFFFF" >

</com.handmark.pulltorefresh.library.PullToRefreshGridView>

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public class FragmentGridView extends Fragment {

private PullToRefreshGridView refreshGridView;
private int page_num = 1;
private List<DataDataBean.ResultsBean> list = new ArrayList<>();//记录当前展示的所有数据
private ILoadingLayout startLabels;
private GridViewAdapter gridViewAdapter;

@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {

View view = inflater.inflate(R.layout.fragment_gridview_layout,container,false);

refreshGridView = view.findViewById(R.id.refresh_grid_view);

return view;
}

@Override
public void onActivityCreated(@Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);

//1.默认的获取第一页的数据,然后设置适配器
getDataFromNet();

//2.设置可以刷新的模式
refreshGridView.setMode(PullToRefreshBase.Mode.BOTH);

//3.设置刷新的时候展示的文字(状态)
startLabels = refreshGridView.getLoadingLayoutProxy(true, false);
startLabels.setPullLabel("下拉刷新");
startLabels.setRefreshingLabel("正在刷新...");
startLabels.setReleaseLabel("放开刷新");
ILoadingLayout endLabels = refreshGridView.getLoadingLayoutProxy(false, true);
endLabels.setPullLabel("上拉刷新");
endLabels.setRefreshingLabel("正在载入...");
endLabels.setReleaseLabel("放开刷新...");

//4.设置下拉和上拉刷新的监听事件
refreshGridView.setOnRefreshListener(new PullToRefreshBase.OnRefreshListener2<GridView>() {
@Override
public void onPullDownToRefresh(PullToRefreshBase<GridView> refreshView) {
//下拉刷新....请求第一页的数据,清空之前的数据,然后再添加设置适配器
getRefreshData();
}

@Override
public void onPullUpToRefresh(PullToRefreshBase<GridView> refreshView) {
//上拉刷新/加载...加载的时候页数++
page_num++;
getDataFromNet();
}
});

}

/**
* 下拉刷新获取数据
*/
private void getRefreshData() {
NetDataUtil.getData("http://gank.io/api/data/Android/10/1", getActivity(), new JsonCallBack() {
@Override
public void getJsonString(String json) {
//解析
Gson gson = new Gson();

DataDataBean dataDataBean = gson.fromJson(json, DataDataBean.class);
//先清空一下数据
list.clear();

//添加到集合的最前边,,,,(0,,,,)
list.addAll(0,dataDataBean.getResults());

//设置适配器
setAdapter();

//设置适配器之后停止刷新的操作
refreshGridView.onRefreshComplete();

//可以设置刷新的时间....
startLabels.setLastUpdatedLabel("上次更新时间:"+new SimpleDateFormat("HH:mm").format(new Date(System.currentTimeMillis())));//last最近的,最后一次update修改/更新
}
});

}

/**
* 刚开始进入页面获取网络数据....还可以作为上拉加载获取数据的操作
*
*
*/
private void getDataFromNet() {
//第一个参数是接口,第二个上下文,第三个回调json数据
NetDataUtil.getData("http://gank.io/api/data/Android/10/"+page_num, getActivity(), new JsonCallBack() {
@Override
public void getJsonString(String json) {

//解析
Gson gson = new Gson();

DataDataBean dataDataBean = gson.fromJson(json, DataDataBean.class);

//往后面添加...
list.addAll(dataDataBean.getResults());

//设置适配器
setAdapter();

//停止刷新
refreshGridView.onRefreshComplete();
}
});

}

/**
* 设置适配器的方法
*/
private void setAdapter() {
if (gridViewAdapter == null){

gridViewAdapter = new GridViewAdapter(getActivity(),list);
refreshGridView.setAdapter(gridViewAdapter);

}else {
gridViewAdapter.notifyDataSetChanged();
}
}
}

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