弹出PopupWindow背景变暗的实现

弹出PopuoWindow后代码里设置的是PopupWindow默认获取焦点所以PopupWindow显示的时候其它控件点击是没有反应的

用到的方法是

pwMyPopWindow.setFocusable(true);

代码里还设置了

pwMyPopWindow.setBackgroundDrawable(this.getResources().getDrawable(
        R.mipmap.ic_launcher));// 设置背景图片，不能在布局中设置，要通过代码来设置
pwMyPopWindow.setOutsideTouchable(true);// 触摸popupwindow外部，popupwindow消失。这个要求你的popupwindow要有背景图片才可以成功
这样点击PopupWindow外部就会自行消失

当我们弹出PopupWindow的时候让背景变半透明  当PopuuWindow消失时让背景变回原样  这样就实现了多数app中PouupWindow的使用效果
用到的方法是

WindowManager.LayoutParams lp = getWindow().getAttributes();
lp.alpha = bgAlpha; //0.0-1.0
getWindow().setAttributes(lp);

下面是代码

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    tools:context=".MainActivity"

    android:background="#ffffff" >

    <LinearLayout

        android:id="@+id/ll_head_bar"

        android:layout_width="wrap_content"

        android:layout_height="400dp"

        android:orientation="vertical">

   <!--这个图片按钮按下时弹出PopupWindow-->

        <ImageButton

            android:id="@+id/ib_operate_more"

           android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:src="@mipmap/ic_launcher" />
<!--这个按钮是测试当PoupWindow显示时点击此按钮没反应 因为此按钮没获取焦点-->

        <Button

            android:layout_marginTop="200dp"

            android:layout_gravity="bottom"

            android:id="@+id/ib_operate_more2"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:text="测试按钮" />

    </LinearLayout>

</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:gravity="center"

    android:orientation="vertical" >

    <TextView

        android:id="@+id/tv_list_item"

        android:layout_width="match_parent"

        android:layout_height="match_parent"

        android:gravity="center"

        android:minHeight="40dp"

        android:minWidth="120dp"

        android:textSize="20sp"

        />

</LinearLayout>

list_item_popupwindow.xml

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="match_parent"

    android:layout_height="wrap_content"

    android:orientation="vertical"

    android:background="#d93c58b3"

    >"

    <ListView

        android:id="@+id/lv_popup_list"

        android:layout_width="match_parent"

        android:layout_height="match_parent"

        android:listSelector="#00000000"

        android:focusableInTouchMode="true"

        android:background="#d42a2a"

        />

</LinearLayout>

task_detail_popupwindow.xml

package com.ceshi.popupwindow;

import android.app.Activity;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.view.WindowManager;

import android.widget.AdapterView;

import android.widget.Button;

import android.widget.ImageButton;

import android.widget.ListView;

import android.widget.PopupWindow;

import android.widget.SimpleAdapter;

import android.widget.Toast;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

public class MainActivity extends Activity {

    private ImageButton ibOperationMore;

    private Button ibOperationMore2;

    List<Map<String, String>> moreList;

    private PopupWindow pwMyPopWindow;// popupwindow

    private ListView lvPopupList;// popupwindow中的ListView

    private int NUM_OF_VISIBLE_LIST_ROWS = 3;// 指定popupwindow中Item的数量

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        iniData();

        iniPopupWindow();

        // 更多操作按钮

        ibOperationMore = (ImageButton) findViewById(R.id.ib_operate_more);

        //ibOperationMore2是用来测试焦点问题  这样popupwindow显示的时候其他的控件是不能点击的

        //换句话说其它控件点击时没反应

        ibOperationMore2 = (Button) findViewById(R.id.ib_operate_more2);

        ibOperationMore2.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View v) {

            Toast.makeText(MainActivity.this,"cao",Toast.LENGTH_SHORT).show();

            }

        });

        ibOperationMore.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View v) {

                if (pwMyPopWindow.isShowing()) {

                    pwMyPopWindow.dismiss();// 关闭

                } else {

                    pwMyPopWindow.showAsDropDown(ibOperationMore);// 显示

                    backgroundAlpha(0.7f);

                }

            }

        });

    }

    private void iniData() {

        moreList = new ArrayList<Map<String, String>>();

        Map<String, String> map;

        map = new HashMap<String, String>();

        map.put("share_key", "复制");

        moreList.add(map);

        map = new HashMap<String, String>();

        map.put("share_key", "删除");

        moreList.add(map);

        map = new HashMap<String, String>();

        map.put("share_key", "修改");

        moreList.add(map);

    }

    private void iniPopupWindow() {

        LayoutInflater inflater = (LayoutInflater) this

                .getSystemService(LAYOUT_INFLATER_SERVICE);

        View layout = inflater.inflate(R.layout.task_detail_popupwindow, null);

        lvPopupList = (ListView) layout.findViewById(R.id.lv_popup_list);

        pwMyPopWindow = new PopupWindow(layout, ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);

        pwMyPopWindow.setFocusable(true);// 加上这个popupwindow中的ListView才可以接收点击事件

        lvPopupList.setAdapter(new SimpleAdapter(MainActivity.this, moreList,

                R.layout.list_item_popupwindow, new String[] { "share_key" },

                new int[] { R.id.tv_list_item }));

        lvPopupList.setOnItemClickListener(new AdapterView.OnItemClickListener() {

            @Override

            public void onItemClick(AdapterView<?> parent, View view,

                                    int position, long id) {

                pwMyPopWindow.dismiss();

                Toast.makeText(MainActivity.this,

                        moreList.get(position).get("share_key"),

                        Toast.LENGTH_LONG).show();

            }

        });

        // 控制popupwindow的宽度和高度自适应

        /*lvPopupList.measure(View.MeasureSpec.UNSPECIFIED,

                View.MeasureSpec.UNSPECIFIED);

        pwMyPopWindow.setWidth(lvPopupList.getMeasuredWidth());

        pwMyPopWindow.setHeight((lvPopupList.getMeasuredHeight() + 20)

                * NUM_OF_VISIBLE_LIST_ROWS);*/

        // 控制popupwindow点击屏幕其他地方消失

        pwMyPopWindow.setBackgroundDrawable(this.getResources().getDrawable(

                R.mipmap.ic_launcher));// 设置背景图片，不能在布局中设置，要通过代码来设置

        pwMyPopWindow.setOutsideTouchable(true);// 触摸popupwindow外部，popupwindow消失。这个要求你的popupwindow要有背景图片才可以成功，如上

        pwMyPopWindow.setOnDismissListener(new PopupWindow.OnDismissListener() {

            @Override

            public void onDismiss() {

                //popupwindow消失的时候恢复成原来的透明度

                backgroundAlpha(1f);

            }

        });

    }

    /**

     * 设置添加屏幕的背景透明度

     * @param bgAlpha

     */

    public void backgroundAlpha(float bgAlpha)

    {

        WindowManager.LayoutParams lp = getWindow().getAttributes();

        lp.alpha = bgAlpha; //0.0-1.0

        getWindow().setAttributes(lp);

    }

}

MainActivity

效果图

弹出PopupWindow背景变暗的实现-LMLPHP

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