Android-基类PopupWindow创建及使用

BasePopupWindow

主要功能

• 实现了弹出时背景半透明效果

  实现

BasePopupWindow.java

public class BasePopupWindow extends PopupWindow {
    private Activity activity;

    public BasePopupWindow(Activity activity) {
        this.activity = activity;
    }

    /**
     * 设置页面的透明度
     * @param bgAlpha 1表示不透明
     */
    public  void setBackgroundAlpha(float bgAlpha) {
        WindowManager.LayoutParams lp = activity.getWindow().getAttributes();
        lp.alpha = bgAlpha;
        if (bgAlpha == 1) {
            activity.getWindow().clearFlags(WindowManager.LayoutParams.FLAG_DIM_BEHIND);//不移除该Flag的话,在有视频的页面上的视频会出现黑屏的bug
        } else {
            activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_DIM_BEHIND);//此行代码主要是解决在华为手机上半透明效果无效的bug
        }
        activity.getWindow().setAttributes(lp);
    }
    
    public void onDismiss() {
        if (activity != null) {
            setBackgroundAlpha(1f);
        }
    }
}

例子

实现选择车辆的弹出选择框

TruckPop.java

import android.app.Activity;
import android.graphics.Color;
import android.graphics.drawable.ColorDrawable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

import androidx.annotation.NonNull;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;

import com.chad.library.adapter.base.BaseQuickAdapter;
import com.chad.library.adapter.base.listener.OnItemClickListener;
import com.hhkj.mcb.R;
import com.hhkj.mcb.common.ui.bean.CarBean;
import com.hhkj.mcb.seller.callbuy.adapter.TruckAdapter;

import java.util.List;

import butterknife.BindView;
import butterknife.ButterKnife;

/**
 * @ClassName: TruckPop
 * @Description:
 * @Author: pinguoooo
 * @Date: 2020/12/11 13:57
 */
public class TruckPop extends BasePopupWindow {
    @BindView(R.id.rv_truck)
    RecyclerView rvTruck;

    private final View view;
    private Activity activity;
    private List<CarBean> carBeanList;
    private TruckAdapter truckAdapter;
    private OnSelectedListener onSelectedListener;
    private int selectIndex = 0;

    public TruckPop(Activity activity, int height, List<CarBean> carBeanList) {
        this(activity,height,carBeanList,0);
    }

    public TruckPop(Activity activity, int height, List<CarBean> carBeanList, int selectIndex) {
        super(activity);
        this.activity = activity;
        this.carBeanList = carBeanList;
        this.selectIndex = selectIndex;

        setOutsideTouchable(true);
        setFocusable(true);
        setWidth(ViewGroup.LayoutParams.MATCH_PARENT);
        setHeight(height);
        setBackgroundDrawable(new ColorDrawable(0x30000000));
        view = LayoutInflater.from(activity).inflate(R.layout.pop_truck, null);
        setContentView(view);
        ButterKnife.bind(this, view);
        initView();
    }



    private void initView() {
        view.setOnClickListener(view -> {
            dismiss();
        });

        rvTruck.setLayoutManager(new LinearLayoutManager(activity));
        rvTruck.setAdapter(truckAdapter = new TruckAdapter(R.layout.truck_item,selectIndex));
        View headerView = LayoutInflater.from(activity).inflate(R.layout.truck_item, null);
        TextView header = headerView.findViewById(R.id.tv_carNumber);
        headerView.setBackgroundColor(Color.WHITE);
        header.setText("全部");
        header.setTextColor(Color.parseColor("#31C863"));
        truckAdapter.addHeaderView(headerView);
        truckAdapter.setList(carBeanList);
        truckAdapter.setOnItemClickListener(new OnItemClickListener() {
            @Override
            public void onItemClick(@NonNull BaseQuickAdapter<?, ?> adapter, @NonNull View view, int position) {
                CarBean carBean = (CarBean) adapter.getData().get(position);
                truckAdapter.setSelectIndex(position);
                if (onSelectedListener != null) {
                    onSelectedListener.onSelect(carBean, position);
                }
            }
        });

    }

    public interface OnSelectedListener {
        void onSelect(CarBean carBean, int position);
    }

    public OnSelectedListener getOnSelectedListener() {
        return onSelectedListener;
    }

    public void setOnSelectedListener(OnSelectedListener onSelectedListener) {
        this.onSelectedListener = onSelectedListener;
    }
}

pop_truck.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/rv_truck"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>

TruckAdapter.java

import android.graphics.Color;
import com.blankj.utilcode.util.ToastUtils;
import com.chad.library.adapter.base.BaseQuickAdapter;
import com.chad.library.adapter.base.viewholder.BaseViewHolder;
import com.hhkj.mcb.R;
import com.hhkj.mcb.common.ui.bean.CarBean;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import java.util.List;

/**
 * @ClassName: PickUpAdapter
 * @Description:
 * @Author: pinguoooo
 * @Date: 2020/11/9 11:29
 */
public class TruckAdapter extends BaseQuickAdapter<CarBean, BaseViewHolder> {
    private int selectIndex;


    public TruckAdapter(int layoutResId, @Nullable List<CarBean> data, int selectIndex) {
        super(layoutResId, data);
        this.selectIndex = selectIndex;
    }

    public TruckAdapter(int layoutResId, int selectIndex) {
        super(layoutResId);
        this.selectIndex = selectIndex;
        ToastUtils.showShort(selectIndex);
    }

    @Override
    protected void convert(@NotNull BaseViewHolder baseViewHolder, CarBean carBean) {
        //因为添加了列表头部，在获取位置索引时需要 -1
        if (selectIndex == baseViewHolder.getLayoutPosition() - 1) {
            //LogUtils.d("layoutPosition:" + baseViewHolder.getLayoutPosition());
            baseViewHolder.itemView.setBackgroundColor(Color.WHITE);
            baseViewHolder.setTextColor(R.id.tv_carNumber, Color.parseColor("#31C863"));
        } else {
            baseViewHolder.itemView.setBackgroundColor(Color.parseColor("#F7F7F7"));
            baseViewHolder.setTextColor(R.id.tv_carNumber, Color.parseColor("#666666"));
        }
    }


    public void setSelectIndex(int selectIndex) {
        this.selectIndex = selectIndex;
        //LogUtils.d("selectIndex:" + selectIndex);
        notifyDataSetChanged();
    }

    public int getSelectIndex() {
        return selectIndex;
    }
}

效果如下