ShowGoodsFragment.java

package com.dreamspace.uucampus.ui.fragment.Market;

import android.os.Bundle;
import android.support.v4.widget.SwipeRefreshLayout;
import android.view.View;
import android.widget.AdapterView;

import com.dreamspace.uucampus.R;
import com.dreamspace.uucampus.adapter.market.GoodsListAdapter;
import com.dreamspace.uucampus.api.ApiManager;
import com.dreamspace.uucampus.common.utils.NetUtils;
import com.dreamspace.uucampus.common.utils.PreferenceUtils;
import com.dreamspace.uucampus.common.utils.TLog;
import com.dreamspace.uucampus.model.api.SearchGoodsRes;
import com.dreamspace.uucampus.ui.activity.Market.FastInAct;
import com.dreamspace.uucampus.ui.activity.Market.GoodDetailAct;
import com.dreamspace.uucampus.ui.base.BaseLazyFragment;
import com.dreamspace.uucampus.widget.LoadMoreListView;

import butterknife.Bind;
import retrofit.Callback;
import retrofit.RetrofitError;
import retrofit.client.Response;

/**
 * Created by Lx on 2015/9/22.
 * 首页快速进入用来展示商品的fragment
 */
public class ShowGoodsFragment extends BaseLazyFragment {
    @Bind(R.id.swiperefresh_id)
    SwipeRefreshLayout swipeRefreshLayout;
    @Bind(R.id.load_more_lv)
    LoadMoreListView loadMoreListView;

    private String label;
    private String category;
    private int goodPage = 1;//当前good的page
    private boolean fragmentDestory = false;
    private boolean alreadyGetData = false;//判断是否已经获取了数据
    private boolean firstGetGoods = true;//判断是不是第一次获取数据，第一次获取数据需要显示“加载中”界面
    private GoodsListAdapter adapter;
    private String order;

    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //获取从activity传递过来的category和label，根据这两个属性获取自己要获取的内容
        label = getArguments() == null? "null":getArguments().getString(FastInAct.LABEL);
        category = getArguments() == null? "null":getArguments().getString(FastInAct.CATEGORY);
    }

    @Override
    protected void onFirstUserVisible() {
        swipeRefreshLayout.setColorSchemeColors(getResources().getColor(R.color.app_theme_color));
        //避免有数据重新加载数据
        if(!alreadyGetData){
            order = ((FastInAct)getActivity()).getOrder();
            getGoods();
        }else{
            if(adapter != null){
                loadMoreListView.setAdapter(adapter);
            }else{
                toggleShowEmpty(true,getString(R.string.no_such_shop),getGoodsClickListener);
            }
        }
    }

    @Override
    protected void onUserVisible() {
        //排列方式变化，重新获取数据
        if(!order.equals(((FastInAct)getActivity()).getOrder())){
            order = ((FastInAct)getActivity()).getOrder();
            firstGetGoods = true;
            goodPage = 1;
            getGoods();
        }
    }

    @Override
    protected void onUserInvisible() {

    }

    @Override
    protected View getLoadingTargetView() {
        return swipeRefreshLayout;
    }

    @Override
    protected void initViewsAndEvents() {
        loadMoreListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                Bundle bundle = new Bundle();
                bundle.putString(GoodDetailAct.GOOD_ID, adapter.getItem(position).getGoods_id());
                readyGo(GoodDetailAct.class, bundle);
            }
        });

        loadMoreListView.setOnLoadMoreListener(new LoadMoreListView.OnLoadMoreListener() {
            @Override
            public void onLoadMore() {
                loadMoreListView.setLoading(true);
                goodPage++;
                getGoods();
            }
        });

        swipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
            @Override
            public void onRefresh() {
                firstGetGoods = true;
                goodPage = 1;
                getGoods();
            }
        });
    }

    @Override
    protected int getContentViewLayoutID() {
        return R.layout.fragment_show_items;
    }

    //order需要根据用户的选择传递进来
    private void getGoods(){
        if(firstGetGoods){
            toggleShowLoading(true,null);
        }
        if(!NetUtils.isNetworkConnected(mContext)){
            showNetWorkError();
            if(firstGetGoods){
                toggleNetworkError(true,getGoodsClickListener);
            }
            loadMoreListView.setLoading(false);
            swipeRefreshLayout.setRefreshing(false);
            return;
        }

        ApiManager.getService(mContext).searchGoods(null, order, category, label, null, null, goodPage,
                PreferenceUtils.getString(getActivity(),PreferenceUtils.Key.LOCATION), new Callback<SearchGoodsRes>() {
            @Override
            public void success(SearchGoodsRes searchGoodsRes, Response response) {
                if (searchGoodsRes != null && !fragmentDestory) {
                    alreadyGetData = true;
                    loadMoreListView.setLoading(false);
                    swipeRefreshLayout.setRefreshing(false);
                    if (goodPage == 1 && searchGoodsRes.getResult().size() == 0) {
                        toggleShowEmpty(true, getString(R.string.no_such_good), null);
                        adapter = null;
                        return;
                    }

                    if (goodPage != 1 && searchGoodsRes.getResult().size() == 0) {
                        //没有更多
                        return;
                    }

                    if (firstGetGoods) {
                        adapter = new GoodsListAdapter(mContext, searchGoodsRes.getResult(), GoodsListAdapter.ViewHolder.class);
                        loadMoreListView.setAdapter(adapter);
                        toggleRestore();
                        firstGetGoods = false;
                    } else {
                        adapter.addEntities(searchGoodsRes.getResult());
                        adapter.notifyDataSetChanged();
                    }
                }
            }

            @Override
            public void failure(RetrofitError error) {
                if(!fragmentDestory){
                    alreadyGetData = false;
                    if(goodPage == 1){
                        toggleShowEmpty(true, null, getGoodsClickListener);
                    }else{
                        showInnerError(error);
                    }
                    loadMoreListView.setLoading(false);
                    swipeRefreshLayout.setRefreshing(false);
                }
            }
        });
    }

    //当更换排序方式时，activity对调用此方法
    public void orderChange(String order){
        firstGetGoods = true;
        goodPage = 1;
        this.order = order;
        getGoods();
    }

    private View.OnClickListener getGoodsClickListener = new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            getGoods();
        }
    };

    @Override
    public void onDestroy() {
        fragmentDestory = true;
        super.onDestroy();
    }
}