[Android] Chapter 6 (1) Dialog Box--The main interface of this chapter's example

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>