分类:C#、Android、VS2015; 创建日期:2016-02-08 在Android应用中,常用的对话框有:Toast、AlertDialog、PRogressDialog、时间选择对话框、日期选择对话框等。这一章主要介绍这些常用对话框的基本用法。 本章源程序共有4个示例,这些示例都在同一个项目
分类:C#、Android、VS2015;
创建日期:2016-02-08
在Android应用中,常用的对话框有:Toast、AlertDialog、PRogressDialog、时间选择对话框、日期选择对话框等。这一章主要介绍这些常用对话框的基本用法。
本章源程序共有4个示例,这些示例都在同一个项目中。
项目名:ch06demos
项目模板:Blank App(Android)
1、运行截图
主界面运行截图如下:
点击每行的示例项,即进入对应示例的页面。
2、主界面(Main.axml)
将Main.axml改为下面的代码:
<span style="color: #0000ff;"></span><span style="color: #ff00ff;">xml version="1.0" encoding="utf-8"</span><span style="color: #0000ff;">?></span> <span style="color: #0000ff;"><span style="color: #800000;">LinearLayout </span><span style="color: #ff0000;">xmlns:android</span><span style="color: #0000ff;">="http://schemas.android.com/apk/res/android"</span><span style="color: #ff0000;"> android:orientation</span><span style="color: #0000ff;">="vertical"</span><span style="color: #ff0000;"> android:layout_width</span><span style="color: #0000ff;">="fill_parent"</span><span style="color: #ff0000;"> android:layout_height</span><span style="color: #0000ff;">="fill_parent"</span><span style="color: #0000ff;">></span> <span style="color: #0000ff;"><span style="color: #800000;">ListView </span><span style="color: #ff0000;">android:minWidth</span><span style="color: #0000ff;">="25px"</span><span style="color: #ff0000;"> android:minHeight</span><span style="color: #0000ff;">="25px"</span><span style="color: #ff0000;"> android:layout_width</span><span style="color: #0000ff;">="match_parent"</span><span style="color: #ff0000;"> android:layout_height</span><span style="color: #0000ff;">="match_parent"</span><span style="color: #ff0000;"> android:id</span><span style="color: #0000ff;">="@+id/listView1"</span> <span style="color: #0000ff;">/></span> <span style="color: #0000ff;"></span><span style="color: #800000;">LinearLayout</span><span style="color: #0000ff;">></span></span></span>
3、在AndroidManifest.xml文件中添加使用的主题
设置应用到所有页面的主题。
<span style="color: #0000ff;"></span><span style="color: #ff00ff;">xml version="1.0" encoding="utf-8"</span><span style="color: #0000ff;">?></span> <span style="color: #0000ff;"><span style="color: #800000;">manifest </span><span style="color: #ff0000;">xmlns:android</span><span style="color: #0000ff;">="http://schemas.android.com/apk/res/android"</span><span style="color: #ff0000;"> package</span><span style="color: #0000ff;">="ch06demos.ch06demos"</span><span style="color: #ff0000;"> android:versionCode</span><span style="color: #0000ff;">="1"</span><span style="color: #ff0000;"> android:versionName</span><span style="color: #0000ff;">="1.0"</span><span style="color: #0000ff;">></span> <span style="color: #0000ff;"><span style="color: #800000;">uses-sdk </span><span style="color: #ff0000;">android:minSdkVersion</span><span style="color: #0000ff;">="16"</span> <span style="color: #0000ff;">/></span> <span style="color: #0000ff;"><span style="color: #800000;">application </span><span style="color: #ff0000;">android:label</span><span style="color: #0000ff;">="ch06demos"</span><span style="color: #ff0000;"> android:theme</span><span style="color: #0000ff;">="@android:style/Theme.DeviceDefault.Light"</span><span style="color: #0000ff;">></span> <span style="color: #0000ff;"></span><span style="color: #800000;">application</span><span style="color: #0000ff;">></span> <span style="color: #0000ff;"></span><span style="color: #800000;">manifest</span><span style="color: #0000ff;">></span></span></span></span>
4、主界面对应的活动文件(MainActivity.cs)
本章示例全部完成后MainActivity.cs的代码如下:
<span style="color: #0000ff;">using</span><span style="color: #000000;"> System.Collections.Generic; </span><span style="color: #0000ff;">using</span><span style="color: #000000;"> Android.App; </span><span style="color: #0000ff;">using</span><span style="color: #000000;"> Android.Widget; </span><span style="color: #0000ff;">using</span><span style="color: #000000;"> Android.OS; </span><span style="color: #0000ff;">using</span><span style="color: #000000;"> ch06demos.SrcActivity; </span><span style="color: #0000ff;">namespace</span><span style="color: #000000;"> ch06demos { [Activity(Label </span>= <span style="color: #800000;">"</span><span style="color: #800000;">ch06demos</span><span style="color: #800000;">"</span>, MainLauncher = <span style="color: #0000ff;">true</span>, Icon = <span style="color: #800000;">"</span><span style="color: #800000;">@drawable/icon</span><span style="color: #800000;">"</span><span style="color: #000000;">)] </span><span style="color: #0000ff;">public</span> <span style="color: #0000ff;">class</span><span style="color: #000000;"> MainActivity : Activity { </span><span style="color: #0000ff;">string</span><span style="color: #000000;">[] items; </span><span style="color: #0000ff;">protected</span> <span style="color: #0000ff;">override</span> <span style="color: #0000ff;">void</span><span style="color: #000000;"> OnCreate(Bundle bundle) { </span><span style="color: #0000ff;">base</span><span style="color: #000000;">.OnCreate(bundle); SetContentView(Resource.Layout.Main); items </span>= <span style="color: #0000ff;">new</span> <span style="color: #0000ff;">string</span><span style="color: #000000;">[] { </span><span style="color: #800000;">"</span><span style="color: #800000;">Demo01:Toast</span><span style="color: #800000;">"</span><span style="color: #000000;">, </span><span style="color: #800000;">"</span><span style="color: #800000;">Demo02:AlertDialog</span><span style="color: #800000;">"</span><span style="color: #000000;">, </span><span style="color: #800000;">"</span><span style="color: #800000;">Demo03:ProgressDialog</span><span style="color: #800000;">"</span><span style="color: #000000;">, </span><span style="color: #800000;">"</span><span style="color: #800000;">Demo04:DatePicker、TimePicker</span><span style="color: #800000;">"</span><span style="color: #000000;"> }; ListView listView1 </span>= FindViewById<listview><span style="color: #000000;">(Resource.Id.listView1); listView1.Adapter </span>= <span style="color: #0000ff;">new</span> ArrayAdapterstring>(<span style="color: #0000ff;">this</span><span style="color: #000000;">, Android.Resource.Layout.SimpleListItem2, items); listView1.ItemClick </span>+= (s, e) =><span style="color: #000000;"> { </span><span style="color: #0000ff;">int</span> index = e.Position + <span style="color: #800080;">1</span><span style="color: #000000;">; </span><span style="color: #0000ff;">switch</span><span style="color: #000000;"> (index) { </span><span style="color: #0000ff;">case</span> <span style="color: #800080;">1</span><span style="color: #000000;">: StartActivity(</span><span style="color: #0000ff;">typeof</span><span style="color: #000000;">(Demo01Toast)); </span><span style="color: #0000ff;">break</span><span style="color: #000000;">; </span><span style="color: #0000ff;">case</span> <span style="color: #800080;">2</span><span style="color: #000000;">: StartActivity(</span><span style="color: #0000ff;">typeof</span><span style="color: #000000;">(Demo02AlertDialog)); </span><span style="color: #0000ff;">break</span><span style="color: #000000;">; </span><span style="color: #0000ff;">case</span> <span style="color: #800080;">3</span><span style="color: #000000;">: StartActivity(</span><span style="color: #0000ff;">typeof</span><span style="color: #000000;">(Demo03ProgressDialog)); </span><span style="color: #0000ff;">break</span><span style="color: #000000;">; </span><span style="color: #0000ff;">case</span> <span style="color: #800080;">4</span><span style="color: #000000;">: StartActivity(</span><span style="color: #0000ff;">typeof</span><span style="color: #000000;">(Demo04DatePickerDialog)); </span><span style="color: #0000ff;">break</span><span style="color: #000000;">; } }; } } }</span></listview>

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