Android实例-设置消息提醒(XE8+小米2)

相关资料：

1.官网实例：http://docwiki.embarcadero.com/RADStudio/XE5/en/Mobile_Tutorial:_Using_the_Notification_Center_(iOS_and_Android)

结果：

1.二个按钮可以新建消息提醒，最小化也是新建消息提醒。

2.程序必须最小化后才能点击消息提醒Label2才会有反映。

实例代码：

 unit Unit1;

 interface

 uses
   System.SysUtils, System.Types, System.UITypes, System.Classes, System.Variants,
   FMX.Types, FMX.Controls, FMX.Forms, FMX.Graphics, FMX.Dialogs,
   FMX.Notification, FMX.Controls.Presentation, FMX.StdCtrls,
   FMX.Platform;//需要引入

 type
   TForm1 = class(TForm)
     NotificationCenter1: TNotificationCenter;
     Button1: TButton;
     Button2: TButton;
     Label1: TLabel;
     Label2: TLabel;
     Button3: TButton;
     procedure Button1Click(Sender: TObject);
     procedure Button2Click(Sender: TObject);
     procedure Button3Click(Sender: TObject);
     procedure FormCreate(Sender: TObject);
     procedure NotificationCenter1ReceiveLocalNotification(Sender: TObject;
       ANotification: TNotification);
   private
     flag: Boolean;
     function HandleAppEvent(AAppEvent: TApplicationEvent; AContext: TObject): Boolean;
     { Private declarations }
   public
     { Public declarations }
   end;

 var
   Form1: TForm1;

 implementation
 {$R *.fmx}
 {$R *.NmXhdpiPh.fmx ANDROID}

 //延时新建一个消息提醒
 procedure TForm1.Button1Click(Sender: TObject);
 var
   MyNotification: TNotification;
 begin
   //通过消息中心创建消息
   MyNotification := NotificationCenter1.CreateNotification;
   try
     MyNotification.Name := '消息的名称'; //设置消息的名称
     MyNotification.AlertBody := '消息的内容'; //设置消息的内容
     MyNotification.Number := ;//设置图标标号
     MyNotification.FireDate := Now + EncodeTime(,, , ); //设置 10 秒后触发消息
     //将消息提交消息中心，并于指定时间触发
     NotificationCenter1.ScheduleNotification(MyNotification);
     Label2.Text := '';
   finally
     MyNotification.DisposeOf; //释放消息接口
   end;
 end;

 //即时新建消息提醒
 procedure TForm1.Button2Click(Sender: TObject);
 var
   MyNotification: TNotification;
 begin
   MyNotification :=NotificationCenter1.CreateNotification; //通过消息中心创建消息
   try
     MyNotification.Name:= '消息的名称'; //设置消息的名称
     MyNotification.AlertBody := '消息的内容'; //设置消息的内容
     MyNotification.Number := ;//设置图标标号
     MyNotification.EnableSound := True;//有提示音
     NotificationCenter1.PresentNotification(MyNotification);  //将消息提交消息中心
     Label2.Text := '';
   finally
     MyNotification.DisposeOf; //释放消息接口
   end;
 end;

 //取消消息提醒
 procedure TForm1.Button3Click(Sender: TObject);
 begin
   NotificationCenter1.CancelNotification('消息的名称');
 end;

 //主要是为程序挂接事件
 procedure TForm1.FormCreate(Sender: TObject);
 var
   aFMXApplicationEventService: IFMXApplicationEventService;
 begin
   flag := True;
   if TPlatformServices.Current.SupportsPlatformService(IFMXApplicationEventService, IInterface(aFMXApplicationEventService)) then
     aFMXApplicationEventService.SetApplicationEventHandler(HandleAppEvent)
   else
   flag := False;
 end;

 //将要挂接在程序上的事件，此事件是最小化时新建一个消息提醒
 function TForm1.HandleAppEvent(AAppEvent: TApplicationEvent;
   AContext: TObject): Boolean;
 var
   MyNotification: TNotification;
 begin
   if flag = False then
     Exit;
   case AAppEvent of
     TApplicationEvent.aeEnteredBackground://监测，当程序后台运行时执行以下事件
     begin
       //通过消息中心创建消息
       MyNotification := NotificationCenter1.CreateNotification;
       try
         MyNotification.Name :='消息的名称'; //设置消息的名称
         //设置消息的内容
         MyNotification.AlertBody := '消息的内容';
         MyNotification.Number := ; //设置图标标号
         MyNotification.EnableSound := True;
         NotificationCenter1.PresentNotification(MyNotification); //将消息提交消息中心
         Label2.Text := '';
       finally
         MyNotification.DisposeOf; //释放消息接口
       end;
     end;
   end;
   Result := True;
 end;

 //程序最小化后，点消提醒时，发生此事件
 procedure TForm1.NotificationCenter1ReceiveLocalNotification(Sender: TObject;
   ANotification: TNotification);
 begin
   //收到消息后程序的操作
   Label2.Text := '收到' + ANotification.Name + '的消息！';
 end;

 end.