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
[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
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
|
<?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> |
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)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
|
<?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> |
3.mainactivity中点击按钮弹出popupwindow
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
|
/** 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); } |
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
1
2
3
4
5
6
7
|
popupwindow.setondismisslistener( new ondismisslistener() { @override public void ondismiss() { // popupwindow隐藏时恢复屏幕正常透明度 setbackgroundalpha(1.0f); } }); |
1
2
3
4
5
6
7
8
9
10
11
12
|
/** * 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); } |
[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
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
|
<?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> |
弹出方法和方式一相似,不过不用再监听popupwindow的退出事件
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
|
/** * 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); } |
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