HotUserFragment.java

package com.example.gitnb.module.search;

import java.util.ArrayList;

import com.example.gitnb.R;
import com.example.gitnb.app.BaseFragment;
import com.example.gitnb.model.User;
import com.example.gitnb.model.search.UsersSearch;
import com.example.gitnb.module.MainFragment;
import com.example.gitnb.module.user.UserDetailActivity;
import com.example.gitnb.module.user.UserListAdapter;

import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.text.TextUtils;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.OvershootInterpolator;
import android.view.inputmethod.InputMethodManager;

import jp.wasabeef.recyclerview.adapters.ScaleInAnimationAdapter;
import jp.wasabeef.recyclerview.adapters.SlideInBottomAnimationAdapter;
import rx.Observer;
import rx.android.schedulers.AndroidSchedulers;
import rx.schedulers.Schedulers;

public class HotUserFragment extends BaseFragment implements MainFragment.TabClickListener,MainFragment.UpdateListener {
	private String TAG = HotUserFragment.class.getName();
	public static String USER = "user_key";
    private boolean isAlreadyLoadData = false;
    private RecyclerView recyclerView;
    private UserListAdapter adapter;
	private boolean isLoadingMore;
	private int page;

	@Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment_list_data, container, false);
        initSwipeRefreshLayout(view);
        recyclerView = (RecyclerView) view.findViewById(R.id.recyclerView);
        page = 1;
        //recyclerView.addItemDecoration(new HorizontalDividerItemDecoration.Builder(getActivity()).build());
        recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
        /*
        recyclerView.addOnScrollListener(new OnScrollListener() {
            @Override
            public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
                super.onScrolled(recyclerView, dx, dy);
                int lastVisibleItem = ((LinearLayoutManager) mLayoutManager).findLastVisibleItemPosition();
                int totalItemCount = adapter.getItemCount();

                if (lastVisibleItem >= totalItemCount - 4 && dy > 0) {
                    if(isLoadingMore){
                        Log.d(TAG,"ignore manually update!");
                    } else{
	                   	page++;
	                   	requestHotUser(true);
                        isLoadingMore = true;
                    }
                }
            }
        });*/

		startRefresh();
        return view;
    }

	@Override
	public void setUserVisibleHint(boolean isVisibleToUser) {
		super.setUserVisibleHint(isVisibleToUser);
		if (isVisibleToUser && !isAlreadyLoadData) {
			isAlreadyLoadData = true;
			startRefresh();
		} else {
	
		}
	}
	
	@Override
	public void startRefresh(){
		super.startRefresh();
    	requestHotUser();
    }

	private String getKey(){
		if(adapter != null && adapter.getShowSearch()){
			return adapter.getSearchText();
		}
		else{
			return ((SearchActivity)getActivity()).getSearchText();
		}
	}

	private String getLanguage(){
		return ((SearchActivity)getActivity()).getLanguageText();
	}

	private void updateAdapter(ArrayList<User> ts){
		if(adapter == null) {
			adapter = new UserListAdapter(getActivity());;
			adapter.update(ts);
			adapter.setOnItemClickListener(new UserListAdapter.OnItemClickListener() {

				@Override
				public void onItemClick(View view, int position) {
					Intent intent = new Intent(getActivity(), UserDetailActivity.class);
					Bundle bundle = new Bundle();
					bundle.putParcelable(USER, adapter.getItem(position));
					intent.putExtras(bundle);
					startActivity(intent);
				}
			});
			adapter.setOnLoadMoreClickListener(new UserListAdapter.OnItemClickListener() {

				@Override
				public void onItemClick(View view, int position) {
					if(isLoadingMore){
						Log.d(TAG,"ignore manually update!");
					} else{
						page++;
						isLoadingMore = true;
						startRefresh();
					}
				}
			});
			adapter.setOnSearchClickListener(new UserListAdapter.OnItemClickListener() {

				@Override
				public void onItemClick(View view, int position) {
					page = 1;
					startRefresh();
				}
			});

			ScaleInAnimationAdapter scaleInAdapter = new ScaleInAnimationAdapter(adapter);
			SlideInBottomAnimationAdapter slideInAdapter = new SlideInBottomAnimationAdapter(scaleInAdapter);
			slideInAdapter.setDuration(300);
			slideInAdapter.setInterpolator(new OvershootInterpolator());
			recyclerView.setAdapter(slideInAdapter);
			recyclerView.scheduleLayoutAnimation();
			recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
				@Override
				public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
					super.onScrollStateChanged(recyclerView, newState);
					if (newState == RecyclerView.SCROLL_STATE_DRAGGING){
						((InputMethodManager)getActivity().getSystemService(Context.INPUT_METHOD_SERVICE))
								.hideSoftInputFromWindow(getActivity().getCurrentFocus().getWindowToken(),
										InputMethodManager.HIDE_NOT_ALWAYS);
					}
				}
			});
		}
		else{
			if(page == 1){
				adapter.update(ts);
				recyclerView.scrollToPosition(0);
			}
			else{
				isLoadingMore = false;
				adapter.insertAtBack(ts);
			}
		}
	}

	public void onOK(UsersSearch data) {
		updateAdapter((ArrayList<User>)data.items);
		endRefresh();
	}

    private void requestHotUser(){
    	String q = "";
		if(!TextUtils.isEmpty(getKey()))
		{
			q += getKey();
		}
		if(!TextUtils.isEmpty(getLanguage()))
		{
			q += "+language:" + getLanguage();
		}
    	//q += "+followers:%3E200";
		if(TextUtils.isEmpty(q)) {
			endRefresh();
			return;
		}
		//searchClient.users(q, "followers", "desc", page);
        getApiService().usersPaginated(q, "followers", "desc", page)
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(new Observer<UsersSearch>() {
                    @Override
                    public void onNext(UsersSearch result) {
                        onOK(result);
                    }

                    @Override
                    public void onCompleted() {
                    }

                    @Override
                    public void onError(Throwable error) {
                        endError(error.getMessage());
                    }
                });
	}

	public Void update() {
		startRefresh();
		return null;
	}

	@Override
	public Void moveToUp() {
		recyclerView.smoothScrollToPosition(0);
		return null;
	}

}