PopupWindow + RecyclerView的使用

前段时间的项目中，遇到了一个对于当时的我来说，是一个比较麻烦的事，就是在使用PopupWindow做顶部的弹出菜单的时候，我用了GridView来添加itemView，结果发现在点击的时候，会出现itemView的父布局也会出现点击现象，没达到项目要求，然后就使用了RecyclerView来做这个功能。下面贴部分代码：

import android.content.Context;
import android.graphics.drawable.ColorDrawable;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v7.widget.DefaultItemAnimator;
import android.support.v7.widget.GridLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.PopupWindow;
import android.widget.RelativeLayout;

import java.util.List;

/**
 * Created by Virczz on 2015/11/18
 */
public class Fm_ShouYe11 extends Fragment implements View.OnClickListener {
    private View view;

    private String totalUrl = "http://www.test.com";
    private Gson gson = new GsonBuilder().create();
    private PopupWindow popupWindow;
    private RelativeLayout rl_main_titlebar;

    /* 点击PopupWindow后的数据传递 */
    private Handler mHandler = new Handler() {
        @Override
        public void handleMessage(Message msg) {

            switch (msg.what) {
                case 0x11:

                    /* 对UI线程的操作 */

                    break;
            }
        }
    };

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        view = inflater.inflate(R.layout.shouye_fm, null);

         /* 布局代码  */
        initView();

        return view;
    }

    @Override
    /** PopupWindow的点击 */
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.iv_main_menu:
                /* 主页左上角的菜单 */
                if (popupWindow != null && popupWindow.isShowing()) {

                    return;
                } else {
                    /* 第一次打开PopupWindow */
                    showPop();
                }
                break;
            default:
                break;
        }
    }

    /**
     * 初始化视图
     */
    private void initView() {
        ImageView iv_main_menu;

        rl_main_titlebar = (RelativeLayout) view.findViewById(R.id.rl_main_titlebar);
        iv_main_menu = (ImageView) view.findViewById(R.id.iv_main_menu);

        rl_main_titlebar.setOnClickListener(this);
        iv_main_menu.setOnClickListener(this);
    }

    /**
     * 展示CategoryPopupWindow
     */
    private void showPop() {
        CategoryPopupWindow catePop = null;

        catePop = new CategoryPopupWindow(getActivity());

    }

    /**
     * CategoryPopupWindow  封装了PopupWindow的类
     */
    public class CategoryPopupWindow {
        final String cagetoryUrl = "http://www.test.com";
        private Context context;
        
        private CategoriesRvAdapter rvAdapter;
        private RecyclerView popupWindowRecycler;

        /* 获取自定义布局文件categories_view的视图*/
        private LayoutInflater mLayoutInflater;
        private ViewGroup customView;

        private StringBuffer sb = new StringBuffer();

        private CategoryPopupWindow(Context context) {
            this.context = context;
            FirstOpenCategory();

        }

        /**
         * 打开PopupWindow   加载数据和界面
         */
        private void FirstOpenCategory() {
            mLayoutInflater = (LayoutInflater) getActivity().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            customView = (ViewGroup) mLayoutInflater.inflate(R.layout.categories_view, null, false);

            /* 初始化视图 */
            popupWindowRecycler = (RecyclerView) customView.findViewById(R.id.recycler_categories);

            /* 这句话可能导致popupWindowRecycler不能展示并报错：RecyclerView: No adapter attached; skipping layout */
            popupWindowRecycler.requestFocus();

            popupWindowRecycler.setHasFixedSize(true);

            GridLayoutManager cateGridLayoutManager = new GridLayoutManager(context, 3);
            popupWindowRecycler.setLayoutManager(cateGridLayoutManager);
            popupWindowRecycler.setItemAnimator(new DefaultItemAnimator());
            popupWindowRecycler.setFocusable(true);

            /* 网络请求区域 */
            rvAdapter = new CategoriesRvAdapter("你的List");
            popupWindowRecycler.setAdapter(rvAdapter);

            popupWindowRecycler.setClickable(true);
            rvAdapter.setOnItemClickListener(new CategoriesRvAdapter.CustomOnItemClickListener() {
                @Override
                public void onItemClick(View v, int position) {
                    sb.append("http://www.test.com");

                    Message message = mHandler.obtainMessage();
                    message.obj = sb.toString();
                    message.what = 0x11;
                    mHandler.sendMessage(message);

                    popupWindow.dismiss();
                }
            });
            

            /* 创建PopupWindow实例 */
            popupWindow = new PopupWindow(customView, ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT, true);

            /* 设置PopupWindow背景 */
            popupWindow.setBackgroundDrawable(new ColorDrawable(getResources().getColor(R.color.colorWhite)));

            /* 设置动画效果 [R.style.AnimationFade] */
            //popupWindow.setAnimationStyle(R.style.AnimationFade);

            popupWindow.update();
            popupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED);
            popupWindow.setTouchable(true);
            popupWindow.setOutsideTouchable(true);
            popupWindow.setFocusable(true);

            /* 设置popupWindow的位置（相对rl_main_titlebar的位置） */
            int topBarHeight = rl_main_titlebar.getBottom();
            popupWindow.showAsDropDown(rl_main_titlebar, 0, (topBarHeight - rl_main_titlebar.getHeight()) / 2);

            /* 自定义view 添加触摸事件 */
            customView.setOnTouchListener(new View.OnTouchListener() {
                @Override
                public boolean onTouch(View v, MotionEvent event) {
                    int height = customView.findViewById(R.id.recycler_categories).getTop();
                    int y = (int) event.getY();
                    if (event.getAction() == MotionEvent.ACTION_UP) {
                        if (y < height) {
//                            popupWindow.dismiss();//这里是点击空白处消失的方法
                        }
                    }
                    return true;
                }
            });
        }
    }
}

上面在CategiriesRvAdapter里为RecyclerView重写了监听接口。

在适配器里要设置item的参数列表

public class CategoriesRvAdapter extends RecyclerView.Adapter<CategoriesRvAdapter.ViewHolder> {

...
ViewGroup.LayoutParams layoutParams = holder.textView.getLayoutParams();
layoutParams.height = (int) (Math.random() * 100);
layoutParams.height = holder.textView.getMaxHeight();
layoutParams.width = holder.textView.getMaxWidth();
holder.textView.setLayoutParams(layoutParams);
...
}

大致就是这样了，用Handler来传递需要传递的数据，就可以操作UI线程了。