popwind 如何使背景变暗

//设置背景颜色变暗

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

lp.alpha=0.3f;

getWindow().setAttributes(lp);

可以设置背景透明度

Popupwindow 完美demo

原文 http://blog.csdn.net/geeklei/article/details/39684495
主题 PopupWindow

Popupwindow 完美demo实现

图示：

关键代码说明：

1.弹出popupwindow，背景变暗

ColorDrawable cd = new ColorDrawable(0x000000);

popuWindow1.setBackgroundDrawable(cd);

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

lp.alpha = 0.4f;

getWindow().setAttributes(lp);

2.popupwindow消失之后，背景恢复

public void onDismiss(){

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

lp.alpha = 1f;

getWindow().setAttributes(lp);

}

3.popupwindow圆角矩形

rounded_corners_bg.xml

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

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

<solid android:color="#FFFFFF" />

<corners

android:topLeftRadius="5dp"

android:topRightRadius="5dp"

android:bottomRightRadius="5dp"

android:bottomLeftRadius="5dp"/>

</shape>

pupopwindow布局文件中设置背景

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

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

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_gravity="center"

android:background="@drawable/rounded_corners_bg"

android:orientation="vertical" >

...

...

...

</RelativeLayout >

4.点击popupwindow外部，popupwindow也会dismiss

popuWindow1.setOutsideTouchable(true);

popuWindow1.setFocusable(true);

完整代码：

1.MainActivity.java

package com.popupwindowdemo;

import android.app.Activity;

import android.content.Intent;

import android.graphics.drawable.ColorDrawable;

import android.net.Uri;

import android.os.Bundle;

import android.view.Gravity;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.view.WindowManager;

import android.widget.Button;

import android.widget.PopupWindow;

import android.widget.TextView;

import android.widget.PopupWindow.OnDismissListener;

public class MainActivity extends Activity {

//popupwindow

private PopupWindow popuWindow1;

private View contentView1;

private TextView textview1;

private Button btn1;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

textview1 = (TextView)findViewById(R.id.textView2);

btn1 = (Button)findViewById(R.id.button1);

btn1.setOnClickListener(new View.OnClickListener() {

public void onClick(View v) {

initPopuWindow1(v);

}

});

textview1.setOnClickListener(new View.OnClickListener() {

public void onClick(View v) {

final Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse("http://blog.csdn.net/geeklei/article/"));

startActivity(intent);

}

});

}

private void initPopuWindow1(View parent) {

if (popuWindow1 == null) {

LayoutInflater mLayoutInflater = LayoutInflater.from(this);

contentView1 = mLayoutInflater.inflate(R.layout.popuwindow1, null);

popuWindow1 = new PopupWindow(contentView1,ViewGroup.LayoutParams.WRAP_CONTENT,

ViewGroup.LayoutParams.WRAP_CONTENT);

}

ColorDrawable cd = new ColorDrawable(0x000000);

popuWindow1.setBackgroundDrawable(cd);

//产生背景变暗效果

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

lp.alpha = 0.4f;

getWindow().setAttributes(lp);

popuWindow1.setOutsideTouchable(true);

popuWindow1.setFocusable(true);

popuWindow1.showAtLocation((View)parent.getParent(), Gravity.CENTER|Gravity.CENTER_HORIZONTAL, 0, 0);

popuWindow1.update();

popuWindow1.setOnDismissListener(new OnDismissListener(){

//在dismiss中恢复透明度

public void onDismiss(){

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

lp.alpha = 1f;

getWindow().setAttributes(lp);

}

});

}

}

2.activity_main.xml

<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"

android:paddingBottom="@dimen/activity_vertical_margin"

android:paddingLeft="@dimen/activity_horizontal_margin"

android:paddingRight="@dimen/activity_horizontal_margin"

android:paddingTop="@dimen/activity_vertical_margin"

tools:context="com.popupwindowdemo.MainActivity" >

<TextView

android:id="@+id/textView1"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="@string/hello_world" />

<TextView

android:id="@+id/textView2"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_alignLeft="@+id/textView1"

android:layout_below="@+id/textView1"

android:layout_marginTop="23dp"

android:text="click to visit my csdn blog"

android:textColor="#1C86EE" />

<Button

android:id="@+id/button1"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_below="@+id/textView2"

android:layout_centerHorizontal="true"

android:layout_marginTop="103dp"

android:text="click to show popupwindow" />

</RelativeLayout>

3.popupwindow1.xml

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

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

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_gravity="center"

android:background="@drawable/rounded_corners_bg"

android:orientation="vertical" >

<LinearLayout

android:layout_width="220dp"

android:layout_height="wrap_content"

android:layout_centerInParent="true"

android:layout_gravity="center_vertical|center"

android:orientation="vertical" >

<TextView

android:id="@+id/group_menu1_passfile"

android:layout_width="fill_parent"

android:layout_height="40dp"

android:layout_marginLeft="20dp"

android:gravity="center_vertical"

android:text="item1"

android:textColor="#000000"

android:textSize="13sp" />

<View

android:layout_width="match_parent"

android:layout_height="0.5dp"

android:background="#999999" />

<TextView

android:id="@+id/group_menu1_playgame"

android:layout_width="fill_parent"

android:layout_height="40dp"

android:layout_marginLeft="20dp"

android:gravity="center_vertical"

android:text="item2"

android:textColor="#000000"

android:textSize="13sp" />

<View

android:layout_width="match_parent"

android:layout_height="0.5dp"

android:background="#999999" />

<TextView

android:id="@+id/group_menu1_removefriend"

android:layout_width="fill_parent"

android:layout_height="40dp"

android:layout_marginLeft="20dp"

android:gravity="center_vertical"

android:text="item3"

android:textColor="#000000"

android:textSize="13sp" />

<View

android:layout_width="match_parent"

android:layout_height="0.5dp"

android:background="#999999" />

<TextView

android:id="@+id/group_menu1_setremark"

android:layout_width="fill_parent"

android:layout_height="40dp"

android:layout_marginLeft="20dp"

android:gravity="center_vertical"

android:text="item4"

android:textColor="#000000"

android:textSize="13sp" />

<View

android:layout_width="match_parent"

android:layout_height="0.5dp"

android:background="#999999" />

<TextView

android:id="@+id/group_menu1_brokemate"

android:layout_width="fill_parent"

android:layout_height="40dp"

android:layout_marginLeft="20dp"

android:gravity="center_vertical"

android:text="item5"

android:textColor="#000000"

android:textSize="13sp" />

</LinearLayout>

</RelativeLayout>

4.rounded_corners_bg.xml

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

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

<solid android:color="#FFFFFF" />

<corners

android:topLeftRadius="5dp"

android:topRightRadius="5dp"

android:bottomRightRadius="5dp"

android:bottomLeftRadius="5dp"/>

</shape>

demo下载地址：
http://download.csdn.net/detail/geeklei/7991521
//window.setWindowAnimations(R.style.dialogstyle); // 添加动画

// 设置PopupWindow外部区域是否可触摸

window.setAnimationStyle(R.style.dialogstyle);

window.setFocusable(false); // 设置PopupWindow可获得焦点

window.setTouchable(true); // 设置PopupWindow可触摸

window.setOutsideTouchable(false); // 设置非PopupWindow区域可触摸