CommentFragment.java

package com.pan.simplepicture.view.fragment;

import android.os.Bundle;
import android.support.v4.widget.SwipeRefreshLayout;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.text.TextUtils;
import android.view.View;

import com.avos.avoscloud.AVObject;
import com.pan.simplepicture.R;
import com.pan.simplepicture.adapter.BaseRecyclerAdapter;
import com.pan.simplepicture.inter.LoadingState;
import com.pan.simplepicture.inter.OnRetryListener;
import com.pan.simplepicture.presenter.CommentPresenter;
import com.pan.simplepicture.presenter.RecommendPresenter;
import com.pan.simplepicture.utils.NetWorkUtil;
import com.pan.simplepicture.view.holder.CommentHolder;
import com.pan.simplepicture.view.impl.ICommentView;
import com.pan.simplepicture.widget.LoadingView;

import java.util.List;
import java.util.TreeMap;

import butterknife.Bind;
import de.greenrobot.event.EventBus;

public class CommentFragment extends BaseFragment implements ICommentView, SwipeRefreshLayout.OnRefreshListener {

    @Bind(R.id.recycler_view)
    public RecyclerView mRecyclerView;

    private BaseRecyclerAdapter mAdapter;
    private boolean canLoadMore = true;

    @Override
    public void setAdapter(List<AVObject> list) {
        if (mRecyclerView == null) return;
        pageNo = list.size();
        if (pageNo < pageSize)
            canLoadMore = false;
        if (mAdapter == null) {
            mAdapter = new BaseRecyclerAdapter(list, R.layout.comment_item, CommentHolder.class);
            mRecyclerView.setAdapter(mAdapter);
        } else {
            if ((mAdapter.getItem(0) == null) && (list.size() == 0))
                return;
            if ((mAdapter.getItem(0) == null) || (list.size() == 0) || (!((AVObject) mAdapter.getItem(0)).getObjectId().equals(list.get(0).getObjectId())))
                mAdapter.setmDatas(list);
        }
    }

    @Override
    public void loadMore(List<AVObject> list) {
        if (mRecyclerView != null && mAdapter != null && list != null) {
            if (list.size() < pageSize)
                canLoadMore = false;
            if (list.size() <= 0) {
                return;
            }
            mAdapter.addAll(list);
            pageNo += list.size();
        }
    }

    @Override
    public void onRefreshComplete() {
        if (mSwipeRefreshLayout != null && mSwipeRefreshLayout.isRefreshing())
            mSwipeRefreshLayout.setRefreshing(false);
    }

    public void onLoadMoreComplete() {
        isLoadingMore = false;
    }

    @Override
    public CommentPresenter getPresenter() {
        return new CommentPresenter();
    }

    private LinearLayoutManager mLayoutManager;

    @Bind(R.id.swipe_refresh_layout)
    SwipeRefreshLayout mSwipeRefreshLayout;


    @Bind(R.id.fl_loading)
    LoadingView fl_loading;


    @Override
    public void showSuccess() {
        fl_loading.setVisibility(View.GONE);
        mSwipeRefreshLayout.setVisibility(View.VISIBLE);
    }

    @Override
    public void showEmpty() {
        fl_loading.setVisibility(View.VISIBLE);
        mSwipeRefreshLayout.setVisibility(View.GONE);
        fl_loading.setState(LoadingState.STATE_EMPTY);
    }

    @Override
    public boolean checkNet() {
        return NetWorkUtil.isNetWorkConnected(mContext);
    }

    @Override
    public void showFaild() {
        mSwipeRefreshLayout.setVisibility(View.GONE);
        fl_loading.setVisibility(View.VISIBLE);
        fl_loading.setState(LoadingState.STATE_ERROR);
    }

    @Override
    public void showNoNet() {
        mSwipeRefreshLayout.setVisibility(View.GONE);
        fl_loading.setVisibility(View.VISIBLE);
        fl_loading.setState(LoadingState.STATE_NO_NET);
    }

    private String mResId;

    public void setResId(String mResId) {
        this.mResId = mResId;
    }


    public void onEventMainThread(AVObject object) {
        if (object == null) return;
        if (mSwipeRefreshLayout.getVisibility() != View.VISIBLE) {
            fl_loading.setVisibility(View.GONE);
            mSwipeRefreshLayout.setVisibility(View.VISIBLE);
        }
        mAdapter.add(0, object);
        mRecyclerView.scrollToPosition(0);
    }


    @Override
    public void bindView(Bundle savedInstanceState) {
        if (TextUtils.isEmpty(mResId) || mPresenter == null || !(mPresenter instanceof CommentPresenter)) {
            return;
        }
        EventBus.getDefault().register(this);
        fl_loading.withLoadedEmptyText("≥﹏≤ , 连条毛都没有 !").withEmptyIco(R.drawable.note_empty).withBtnEmptyEnnable(false)
                .withErrorIco(R.drawable.ic_chat_empty).withLoadedErrorText("(῀( ˙᷄ỏ˙᷅ )῀)ᵒᵐᵍᵎᵎᵎ,我家程序猿跑路了 !").withbtnErrorText("去找回她!!!")
                .withLoadedNoNetText("你挡着信号啦o(￣ヘ￣o)☞ᗒᗒ 你走").withNoNetIco(R.drawable.ic_chat_empty).withbtnNoNetText("网弄好了，重试")
                .withLoadingIco(R.drawable.loading_animation).withLoadingText("加载中...").withOnRetryListener(new OnRetryListener() {
            @Override
            public void onRetry() {
                ((CommentPresenter) mPresenter).getComments(params);
            }
        }).build();
        mSwipeRefreshLayout.setOnRefreshListener(this);
        mLayoutManager = new LinearLayoutManager(mRecyclerView.getContext());
        mRecyclerView.setLayoutManager(mLayoutManager);
        mRecyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
            @Override
            public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
                super.onScrolled(recyclerView, dx, dy);
                if (canLoadMore)
                    CommentFragment.this.onScrolled(recyclerView, dx, dy);
            }
        });
        params = new TreeMap<String, String>();
        params.put("pageNo", String.valueOf(pageNo));
        params.put("class", "Comment");
        params.put("rsId", mResId);
        params.put("size", String.valueOf(pageSize));
        params.put("order", "published");
        ((CommentPresenter) mPresenter).getComments(params);
    }

    @Override
    public int getContentLayout() {
        return R.layout.list_fragment;
    }

    private TreeMap<String, String> params;
    private int page = 0;
    private int pageNo = 0;
    private final int pageSize = 15;

    @Override
    public void onRefresh() {
        pageNo = 0;
        params.put("pageNo", String.valueOf(pageNo));
        ((CommentPresenter) mPresenter).getComments(params);
    }

    public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
        int lastVisibleItem = mLayoutManager.findLastVisibleItemPosition();
        int totalItemCount = mLayoutManager.getItemCount();
        //lastVisibleItem >= totalItemCount - 2 表示剩下2个item自动加载，各位自由选择
        // dy>0 表示向下滑动
        if (!isLoadingMore && lastVisibleItem >= totalItemCount - 4 && dy > 0) {
            isLoadingMore = true;
            loadPage();//这里多线程也要手动控制isLoadingMore
        }

    }

    private void loadPage() {
        params.put("pageNo", String.valueOf(pageNo));
        ((CommentPresenter) mPresenter).getComments(params);
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        EventBus.getDefault().unregister(this);
    }

    private boolean isLoadingMore;
}