底部弹出popupwindow,背景变为半透明效果,采用两种方式实现
先来看看运行效果图
![popupwindow从底部弹出(ios实现底部弹出popupwindow效果 io","p":true,"g":[{"type":"sug","sa":"s_1","q":"popupwindow从底部弹出"}],"slid":"106898441381590","queryi](http://www.zzvips.com/uploads/allimg/210323/16012923J-0.png)
![popupwindow从底部弹出(ios实现底部弹出popupwindow效果 io","p":true,"g":[{"type":"sug","sa":"s_1","q":"popupwindow从底部弹出"}],"slid":"106898441381590","queryi](http://www.zzvips.com/uploads/allimg/210323/1601293003-1.png)
[方式一]实现从底部弹出popupwindow
原理:定义一个高度为wrap_content的popupwindow布局文件,根据屏幕底部的位置显示在bottom
1.首先定义一个高度为wrap_content的popupwindow布局文件
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<?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:gravity="center"
android:padding="8dp"
android:orientation="vertical" >
<linearlayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:orientation="vertical"
android:background="@drawable/shape_info_bg">
<textview android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="8dp"
android:gravity="center"
android:textcolor="@color/theme_blue"
android:text="拍照"/>
<view android:layout_width="match_parent"
android:layout_height="0.2dp"
android:background="@color/theme_blue"/>
<textview android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="8dp"
android:gravity="center"
android:textcolor="@color/theme_blue"
android:text="相冊"/>
</linearlayout>
<relativelayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margintop="5dp"
android:padding="1dp">
<button
android:id="@+id/btn_cancle"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:padding="8dp"
android:textcolor="@color/theme_blue"
android:background="@drawable/shape_info_bg"
android:text="取消" />
</relativelayout>
</linearlayout>
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2.在popupwindow所在的activity根布局中声明id(在弹出popupwindow作为位置参考的相对view)
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<?xml version="1.0" encoding="utf-8"?>
<linearlayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/root_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="@color/white">
<button android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="底部弹出popupwindow"
android:onclick="openpop"/>
<button android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="半透明底部popupwindow"
android:onclick="openpop2"/>
</linearlayout>
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3.mainactivity中点击按钮弹出popupwindow
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/** 弹出底部对话框 */
public void openpop(view view) {
view popview = layoutinflater.from(mcontext).inflate(
r.layout.pop_bottom, null);
view rootview = findviewbyid(r.id.root_main); // 當前頁面的根佈局
final popupwindow popupwindow = new popupwindow(popview, layoutparams.match_parent,layoutparams.wrap_content);
setbackgroundalpha(0.5f);//设置屏幕透明度
popupwindow.setbackgrounddrawable(new bitmapdrawable());
popupwindow.setfocusable(true);// 点击空白处时,隐藏掉pop窗口
// 顯示在根佈局的底部
popupwindow.showatlocation(rootview, gravity.bottom | gravity.left, 0,
0);
}
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4.设置背景变为半透明效果,由于popupwindow中并未设置背景色,所以弹出时popupwindow以外的部分显示当前acitivity的内容,设置背景色原理通过设置当前activity所在屏幕的透明度来达到背景透明的效果!在退出时popupwindow时,需要恢复屏幕原有透明度
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popupwindow.setondismisslistener(new ondismisslistener() {
@override
public void ondismiss() {
// popupwindow隐藏时恢复屏幕正常透明度
setbackgroundalpha(1.0f);
}
});
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/**
* 设置添加屏幕的背景透明度
*
* @param bgalpha
* 屏幕透明度0.0-1.0 1表示完全不透明
*/
public void setbackgroundalpha(float bgalpha) {
windowmanager.layoutparams lp = ((activity) mcontext).getwindow()
.getattributes();
lp.alpha = bgalpha;
((activity) mcontext).getwindow().setattributes(lp);
}
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[方式二]全屏popupwindow实现底部弹出,背景半透明
原理:弹出一个全屏popupwindow,高度为match_parent,将根布局的gravity属性设置bottom,根布局背景设置为一个半透明的颜色#36000000, 弹出时全屏的popupwindow半透明效果背景覆盖了在activity之上 给人感觉上是popupwindow弹出后,背景变成半透明
布局文件
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<?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:padding="8dp"
android:orientation="vertical"
android:background="#36000000"
android:gravity="bottom">
<linearlayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:orientation="vertical"
android:background="@drawable/shape_info_bg">
<textview android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="8dp"
android:gravity="center"
android:textcolor="@color/theme_blue"
android:text="拍照"/>
<view android:layout_width="match_parent"
android:layout_height="0.2dp"
android:background="@color/theme_blue"/>
<textview android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="8dp"
android:gravity="center"
android:textcolor="@color/theme_blue"
android:text="相冊"/>
</linearlayout>
<relativelayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margintop="5dp"
android:padding="1dp">
<button
android:id="@+id/btn_cancle"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:padding="8dp"
android:textcolor="@color/theme_blue"
android:background="@drawable/shape_info_bg"
android:text="取消" />
</relativelayout>
</linearlayout>
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弹出方法和方式一相似,不过不用再监听popupwindow的退出事件
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/**
* 弹出底部对话框,达到背景背景透明效果
*
* 实现原理:弹出一个全屏popupwindow,将gravity属性设置bottom,根背景设置为一个半透明的颜色,
* 弹出时popupwindow的半透明效果背景覆盖了在activity之上 给人感觉上是popupwindow弹出后,背景变成半透明
*/
public void openpop2(view view) {
view popview = layoutinflater.from(mcontext).inflate(
r.layout.pop_bottom_alpha, null);
view rootview = findviewbyid(r.id.root_main); // 當前頁面的根佈局
final popupwindow popupwindow = new popupwindow(popview,
layoutparams.match_parent, layoutparams.match_parent);
// 设置弹出动画
popupwindow.setanimationstyle(r.style.animationfadebottom);
popupwindow.setbackgrounddrawable(new bitmapdrawable());
// 顯示在根佈局的底部
popupwindow.showatlocation(rootview, gravity.bottom | gravity.left, 0,
0);
}
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以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。
原文链接:http://blog.csdn.net/LANG791534167/article/details/48985101








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