assistant-android/app/src/main/java/com/gh/gamecenter/GameNewsActivity.java

package com.gh.gamecenter;

import android.os.Bundle;
import android.support.v4.util.ArrayMap;
import android.support.v7.widget.GridLayoutManager;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.text.TextUtils;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
import android.widget.TextView;

import com.gh.base.BaseActivity;
import com.gh.common.util.DisplayUtils;
import com.gh.gamecenter.adapter.GameNewsAdapter;
import com.gh.gamecenter.adapter.GameNewsTypeListAdapter;
import com.gh.gamecenter.eventbus.EBTypeChange;
import com.gh.gamecenter.retrofit.Response;
import com.gh.gamecenter.retrofit.RetrofitManager;

import java.util.ArrayList;
import java.util.List;

import butterknife.BindView;
import retrofit2.adapter.rxjava.HttpException;
import rx.android.schedulers.AndroidSchedulers;
import rx.schedulers.Schedulers;

/**
 * Created by LGT on 2016/8/29.
 * 游戏新闻界面
 */
public class GameNewsActivity extends BaseActivity implements View.OnClickListener {

    @BindView(R.id.game_news_list)
    RecyclerView game_news_list;
    @BindView(R.id.game_news_top_type_list)
    RecyclerView game_news_top_type_list;
    @BindView(R.id.reuse_none_data)
    LinearLayout mNoDataLl;
    @BindView(R.id.reuse_tv_none_data)
    TextView mNoDataTv;

    private GameNewsAdapter adapter;
    private GameNewsTypeListAdapter typeListAdapter;
    private LinearLayoutManager layoutManager;
    private ImageView ivSearch;

    private ArrayMap<String, GameNewsAdapter> adapterMap;

    private List<String> typeList;

    private String gameId;
    private String entrance;

    private float startY = 0;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        entrance = getIntent().getStringExtra("entrance");

        View contentView = View.inflate(this, R.layout.activity_game_news, null);

        ivSearch = new ImageView(this);
        ivSearch.setImageResource(R.drawable.ic_search_white);

        RelativeLayout.LayoutParams ivSearchParams = new RelativeLayout.LayoutParams(
                DisplayUtils.dip2px(this, 20), DisplayUtils.dip2px(this, 20));
        ivSearchParams.addRule(RelativeLayout.CENTER_VERTICAL);
        ivSearchParams.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);
        ivSearchParams.setMargins(0, 0, DisplayUtils.dip2px(this, 10), 0);

        RelativeLayout reuse_actionbar = (RelativeLayout) contentView.findViewById(R.id.reuse_actionbar);
        reuse_actionbar.addView(ivSearch, ivSearchParams);
        ivSearch.setOnClickListener(this);
        ivSearch.setVisibility(View.GONE);

        String gameName = getIntent().getStringExtra("gameName");
        init(contentView, gameName);

        mNoDataTv.setText("暂无内容");

        adapterMap = new ArrayMap<>();

        typeList = new ArrayList<>();

        gameId = getIntent().getStringExtra("gameId");

        game_news_list.setHasFixedSize(true);
        layoutManager = new LinearLayoutManager(this);
        game_news_list.setLayoutManager(layoutManager);

        game_news_list.addOnScrollListener(new RecyclerView.OnScrollListener() {
            @Override
            public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
                super.onScrolled(recyclerView, dx, dy);

                if (layoutManager.findFirstVisibleItemPosition() >= 1) {
                    game_news_top_type_list.setVisibility(View.VISIBLE);
                    ivSearch.setVisibility(View.VISIBLE);
                } else {
                    game_news_top_type_list.setVisibility(View.GONE);
                    ivSearch.setVisibility(View.GONE);
                }

            }

            @Override
            public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
                super.onScrollStateChanged(recyclerView, newState);
                if (adapter != null && newState == RecyclerView.SCROLL_STATE_IDLE
                        && layoutManager.findLastVisibleItemPosition() == adapter.getItemCount() - 1) {
                    if (!adapter.isRemove() && !adapter.isLoading() && !adapter.isNetworkError()) {
                        adapter.addList(adapter.getNewsList().size());
                    }
                }
            }
        });

        game_news_top_type_list.setHasFixedSize(true);
        game_news_top_type_list.setLayoutManager(new GridLayoutManager(this, 5));

        //禁止由于滑动出现的阴影
        game_news_top_type_list.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View v, MotionEvent event) {
                if (event.getAction() == MotionEvent.ACTION_DOWN) {
                    startY = event.getY();
                } else if (event.getAction() == MotionEvent.ACTION_MOVE) {
                    if (Math.abs(startY - event.getY()) > 0) {
                        return true;
                    }
                }
                return false;
            }
        });

        if (!TextUtils.isEmpty(gameId)) {
            getGameArticleType();
        }
    }

    private void getGameArticleType() {
        RetrofitManager.getApi()
                .getGameArticleType(gameId)
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(new Response<List<String>>() {
                    @Override
                    public void onResponse(List<String> response) {
                        super.onResponse(response);
                        typeList = response;
                        typeList.add(0, "全部");
                        adapter = new GameNewsAdapter(GameNewsActivity.this, typeList, game_news_list, gameId, "全部", entrance, mNoDataLl);                        adapterMap.put("全部", adapter);
                        game_news_list.setAdapter(adapter);

                        typeListAdapter = new GameNewsTypeListAdapter(GameNewsActivity.this, typeList, "全部");
                        game_news_top_type_list.setAdapter(typeListAdapter);

                        ViewGroup.LayoutParams params = game_news_top_type_list.getLayoutParams();
                        params.height = (int) Math.ceil(typeList.size() / 5f) * DisplayUtils.dip2px(GameNewsActivity.this, 35)
                                + DisplayUtils.dip2px(GameNewsActivity.this, 12);
                        game_news_top_type_list.setLayoutParams(params);
                    }

                    @Override
                    public void onFailure(HttpException e) {
                        super.onFailure(e);
                    }
                });
    }

    public void onEventMainThread(EBTypeChange change) {
        adapter = adapterMap.get(change.getType());
        if (adapter == null) {
            adapter = new GameNewsAdapter(GameNewsActivity.this, typeList, game_news_list, gameId, change.getType(), entrance, mNoDataLl);
            adapterMap.put(change.getType(), adapter);
        }
        game_news_list.setAdapter(adapter);

        game_news_top_type_list.setVisibility(View.GONE);
        ivSearch.setVisibility(View.GONE);
        typeListAdapter.setNewsType(change.getType(), change.getPosition());
    }

    @Override
    public void onClick(View v) {
        if (v == ivSearch) {
            game_news_list.scrollToPosition(0);
            game_news_top_type_list.setVisibility(View.GONE);
            ivSearch.setVisibility(View.GONE);
            adapter.openKeyBoard();
        }
    }
}