ShotsFragment.java

/*
 *
 *  * Copyright 2015 Van Shu
 *  *
 *  * Licensed under the Apache License, Version 2.0 (the "License");
 *  * you may not use this file except in compliance with the License.
 *  * You may obtain a copy of the License at
 *  *
 *  *    http://www.apache.org/licenses/LICENSE-2.0
 *  *
 *  * Unless required by applicable law or agreed to in writing, software
 *  * distributed under the License is distributed on an "AS IS" BASIS,
 *  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  * See the License for the specific language governing permissions and
 *  * limitations under the License.
 *
 */

package com.mobimvp.cliques.ui.fragment;

import android.app.Activity;
import android.app.ListFragment;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v4.view.ViewCompat;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AbsListView;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.ListView;

import com.android.volley.Response;
import com.mobimvp.cliques.R;
import com.mobimvp.cliques.model.Shot;
import com.mobimvp.cliques.service.DribbbleApi;
import com.mobimvp.cliques.service.GsonRequest;
import com.mobimvp.cliques.ui.adapter.ShotsAdapter;
import com.mobimvp.cliques.ui.widgets.ListViewUtils;
import com.mobimvp.cliques.ui.widgets.LoadingFooter;

import java.lang.reflect.Array;
import java.util.ArrayList;
import java.util.Arrays;

import static com.mobimvp.cliques.util.LogUtils.makeLogTag;


public class ShotsFragment extends BaseFragment implements AdapterView.OnItemClickListener {
    private static final String TAG = makeLogTag(ShotsFragment.class);
    public static final String POPULAR="comments";
    public static final String RECENT="recent";
    public static final String VIEWS="views";
    private String sort;
    private ArrayList<Shot> shots;
    private ShotsAdapter mShotsAdapter;
    private View mContentView;
    private ListView mListView;
    private LoadingFooter mLoadingFooter;
    protected int mPage = 1;


    public interface Listener {
        public void onFragmentViewCreated(ShotsFragment fragment);
        public void onFragmentAttached(ShotsFragment fragment);
        public void onFragmentDetached(ShotsFragment fragment);
    }

    @Override
    public void onAttach(Activity activity) {
        super.onAttach(activity);
        if(getActivity() instanceof Listener){
            ((Listener)getActivity()).onFragmentAttached(this);
        }
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        sort=getArguments().getString("sort");
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        mContentView=inflater.inflate(R.layout.fragment_shots, container, false);
        mListView= (ListView) mContentView.findViewById(R.id.listview);
        mListView.setOnItemClickListener(this);
        View header = new View(getActivity());
        mLoadingFooter = new LoadingFooter(getActivity());
        mListView.addHeaderView(header);
        mListView.addFooterView(mLoadingFooter.getView());
        shots=new ArrayList<>();
        mShotsAdapter=new ShotsAdapter(shots);
        mListView.setAdapter(mShotsAdapter);
        mListView.setOnScrollListener(new AbsListView.OnScrollListener() {
            @Override
            public void onScrollStateChanged(AbsListView view, int scrollState) {
            }

            @Override
            public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount,
                                 int totalItemCount) {
                if (mLoadingFooter.getState() == LoadingFooter.State.Loading
                        || mLoadingFooter.getState() == LoadingFooter.State.TheEnd) {
                    return;
                }
                if (firstVisibleItem + visibleItemCount >= totalItemCount
                        && totalItemCount != 0
                        && totalItemCount != mListView.getHeaderViewsCount()
                        + mListView.getFooterViewsCount() && mListView.getCount() > 0) {
                    loadNextPage();
                }
            }
        });
        loadFirstPage();
        return super.onCreateView(inflater,container,savedInstanceState);
    }

    @Override
    public void onViewCreated(View view, Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);
        if (getActivity() instanceof Listener) {
            ((Listener) getActivity()).onFragmentViewCreated(this);
        }
    }

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

    @Override
    public void onDetach() {
        super.onDetach();
        if(getActivity() instanceof Listener){
            ((Listener)getActivity()).onFragmentDetached(this);
        }
    }

    private Response.Listener<Shot[]> listener=new Response.Listener<Shot[]>() {
        @Override
        public void onResponse(Shot[] response) {
                if(response==null){
                    setEmptyView();
                } else {
                    showResult();
                    shots.addAll(Arrays.asList(response));
                    mShotsAdapter.notifyDataSetChanged();
                    mLoadingFooter.setState(LoadingFooter.State.Idle);
                }
        }
    };

    public void loadFirstPageAndScrollToTop() {
        ListViewUtils.smoothScrollListViewToTop(mListView);
        loadFirstPage();
    }
    protected  void resetData(){
        mPage=1;
        shots.clear();
    }

    public boolean canCollectionViewScrollUp() {
        return ViewCompat.canScrollVertically(mListView, -1);
    }


    protected void loadNextPage() {
        mLoadingFooter.setState(LoadingFooter.State.Loading);
        loadData(mPage + 1);
        mPage++;
    }


    protected void loadFirstPage() {
        loadData(1);
    }

    private  void loadData(int page){
        addRequest(new GsonRequest<>(DribbbleApi.getShots(page,sort),Shot[].class,listener,errorListener));
    }


    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

    }


    public   ListView getListView(){
        return mListView;
    }
}