MainHomeFragment.java

package com.sxjs.jd.composition.main.homefragment;

import android.os.Build;
import android.os.Bundle;
import android.support.v7.widget.GridLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.FrameLayout;
import android.widget.LinearLayout;

import com.sxjs.common.base.baseadapter.BaseQuickAdapter;
import com.sxjs.common.util.ScreenUtil;
import com.sxjs.common.widget.headerview.JDHeaderView;
import com.sxjs.common.widget.pulltorefresh.PtrFrameLayout;
import com.sxjs.common.widget.pulltorefresh.PtrHandler;
import com.sxjs.jd.R;
import com.sxjs.common.base.BaseFragment;
import com.sxjs.jd.entities.HomeIndex;

import javax.inject.Inject;

import butterknife.BindView;
import butterknife.ButterKnife;

/**
 * @author 作者：admin on 2017/3/15 10:47.
 */
public class MainHomeFragment extends BaseFragment implements JDHeaderView.RefreshDistanceListener ,HomeContract.View, PositionChangedListener, BaseQuickAdapter.RequestLoadMoreListener {
    /**
     * 改变titlebar中icon颜色时的距离
     */
    private static int DISTANCE_WHEN_TO_SELECTED = 40;
    @BindView(R.id.scanning_layout)
    LinearLayout scanningLayout;
    @BindView(R.id.advisory_layout)
    LinearLayout advisoryLayout;
    @BindView(R.id.home_title_bar_layout)
    FrameLayout homeTitleBarLayout;
    @BindView(R.id.home_title_bar_bg_view)
    View homeTitleBarBgView;
    private View rootView = null;
    private RecyclerView recyclerView;
    private JDHeaderView mPtrFrame;
    private HomeMultipleRecycleAdapter adapter;
    private int distanceY;
    /**
     * 加载首页样式标记
     */
    private int flag = 1;

    @Inject
    HomePresenter mPresenter;

    public static MainHomeFragment newInstance() {
        return new MainHomeFragment();
    }



    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        rootView = inflater.inflate(R.layout.fragment_recycle, container, false);
        initBase();
        unbinder = ButterKnife.bind(this, rootView);
        return rootView;
    }

    /**
     * 初始化下拉刷新及滚动距离title发生的改变
     */
    private void initBase() {
        DaggerHomeFragmentComponent.builder()
                .appComponent(getAppComponent())
                .homePresenterModule(new HomePresenterModule(this))
                .build()
                .inject(this);

        initPtrFrame();
        recyclerView = (RecyclerView) this.rootView.findViewById(R.id.recyclerView);
        GridLayoutManager gridLayoutManager = new GridLayoutManager(recyclerView.getContext(), 4, GridLayoutManager.VERTICAL, false);
        recyclerView.setLayoutManager(gridLayoutManager);
        recyclerView.addItemDecoration(new SpaceItemDecoration(ScreenUtil.dip2px(getContext(),3)));
        recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
            @Override
            public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
                super.onScrolled(recyclerView, dx, dy);
                distanceY += dy;
                if (distanceY > ScreenUtil.dip2px(mActivity, 20)) {
                    homeTitleBarBgView.setBackgroundColor(getResources().getColor(R.color.white));
                    if (Build.VERSION.SDK_INT > 10) {
                        homeTitleBarBgView.setAlpha(distanceY * 1.0f / ScreenUtil.dip2px(mActivity, 100));
                    }
                    else {
                        DISTANCE_WHEN_TO_SELECTED = 20;
                    }
                }
                else {
                    homeTitleBarBgView.setBackgroundColor(0);
                }

                if (distanceY > ScreenUtil.dip2px(mActivity, DISTANCE_WHEN_TO_SELECTED) && !scanningLayout.isSelected()) {
                    scanningLayout.setSelected(true);
                    advisoryLayout.setSelected(true);
                }
                else if (distanceY <= ScreenUtil.dip2px(mActivity, DISTANCE_WHEN_TO_SELECTED) && scanningLayout.isSelected()) {
                    scanningLayout.setSelected(false);
                    advisoryLayout.setSelected(false);
                }
            }
        });
        adapter = new HomeMultipleRecycleAdapter();
        /*recyclerView.setOnScrollListener(new RecyclerView.OnScrollListener() {
            @Override
            public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
                switch (newState){
                    //滑动停止
                    case RecyclerView.SCROLL_STATE_IDLE:

                        break;
                    //手指触摸屏幕停止或拖动时
                    case RecyclerView.SCROLL_STATE_DRAGGING:

                        break;
                    //滑动且手指离开屏幕
                    case RecyclerView.SCROLL_STATE_SETTLING:

                        break;
                }

            }
        });*/

        /*recyclerView.setOnFlingListener(new RecyclerView.OnFlingListener() {
            @Override
            public boolean onFling(int velocityX, int velocityY) {
                if(Math.abs(velocityY) > 5000){

                }
                return false;
            }
        });*/
        adapter.setOnLoadMoreListener(this);
        adapter.setEnableLoadMore(true);
        adapter.setListener(this);
        recyclerView.setAdapter(adapter);
        mPresenter.getHomeIndexData(flag);
        flag = 0;
    }

    /**
     * 初始化下拉刷新
     */
    private void initPtrFrame() {
        mPtrFrame = (JDHeaderView) rootView.findViewById(R.id.rotate_header_list_view_frame);
        mPtrFrame.setOnRefreshDistanceListener(this);
        mPtrFrame.setPtrHandler(new PtrHandler() {
            @Override
            public void onRefreshBegin(PtrFrameLayout frame) {
                updateData();
            }
        });

        // 是否进入页面就开始显示刷新动作
        /*mPtrFrame.postDelayed(new Runnable() {
            @Override
            public void run() {
                mPtrFrame.autoRefresh();
            }
        }, 100);*/
    }

    /**
     * 下拉后刷新数据
     */
    private void updateData() {
        mPtrFrame.postDelayed(new Runnable() {
            @Override
            public void run() {
                mPresenter.getHomeIndexData(flag);
                if(flag == 0){
                    flag = 1;
                }
                else{
                    flag = 0;
                }
            }
        }, 1000);
    }

    @Override
    public void onStart() {
        super.onStart();

    }


    @Override
    public void onPositionChange(int currentPosY) {
        if (currentPosY > 0) {
            if (homeTitleBarLayout.getVisibility() == View.VISIBLE) {
                homeTitleBarLayout.setVisibility(View.GONE);
            }
        } else {
            if (homeTitleBarLayout.getVisibility() == View.GONE) {
                homeTitleBarLayout.setVisibility(View.VISIBLE);
                distanceY = 0;
            }
        }
    }


    @Override
    public void setHomeIndexData(HomeIndex homeIndex) {
        if(homeIndex == null){
            mPtrFrame.refreshComplete();
            return;
        }
        adapter.getData().clear();
        adapter.resetMaxHasLoadPosition();
        adapter.setNewData(homeIndex.itemInfoList);
        mPtrFrame.refreshComplete();
    }

    @Override
    public void setRecommendedWares(HomeIndex recommendedProducts) {
        adapter.getData().addAll(recommendedProducts.itemInfoList);
        adapter.loadMoreComplete();
    }

    @Override
    public void setMoreRecommendedWares(HomeIndex moreRecommendedProducts) {
        adapter.getData().addAll(moreRecommendedProducts.itemInfoList);
        adapter.loadMoreComplete();
    }

    /**
     * 当前recyclerView 的position的回调
     * @param position
     */
    @Override
    public void currentPosition(int position) {

    }

    @Override
    public void onLoadMoreRequested() {
        recyclerView.postDelayed(new Runnable() {
            @Override
            public void run() {
                if (adapter.getData().size() >= 90){
                    adapter.loadMoreEnd(false);
                }
                else{
                    mPresenter.getRecommendedWares();
                }
            }
        },1000);
    }
}