Category: C#, Android, VS2015; Creation date: 2016-02-08 In Android applications, commonly used dialog boxes include: Toast, AlertDialog, PRogressDialog, time selection dialog box, date selection dialog box, etc. This chapter mainly introduces the basic usage of these common dialog boxes. There are 4 examples of the source program in this chapter, and these examples are all in the same project
Category: C#, Android, VS2015;
Creation date: 2016-02-08
In Android applications, commonly used dialog boxes include: Toast, AlertDialog, PRogressDialog, time selection dialog box, date selection dialog box, etc. This chapter mainly introduces the basic usage of these common dialog boxes.
There are 4 examples of the source program in this chapter, and these examples are all in the same project.
Project name: ch06demos
Project template: Blank App(Android)
1. Running screenshots
The main interface operation screenshot is as follows:
Click on the example item in each row to enter the page of the corresponding example.
2. Main interface (Main.axml)
Change Main.axml to the following code:
<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. Add the theme used in the AndroidManifest.xml file
Set a theme that applies to all pages.
<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. Activity file corresponding to the main interface (MainActivity.cs)
After all the examples in this chapter are completed, the code of MainActivity.cs is as follows:
<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>