Question

如何在Delphi XE5中使用Android的toast？

我尝试使用库FMX.AndroidLike.Toast，但系统在Toast显示之前执行期间关闭。

Answer 1

我知道你已经知道......但是对于其他人......以防万一。

您需要安装该组件，将其添加到您要显示toastmessages的表单并致电...

componentname.now('Your toastmessage string');

如果您想使用基于组件的方法，请不要忘记添加单元FMX.Androidlike.Toast。该组件可以在外观上进行相当多的配置（也就是显示消息的持续时间）。

如果你想使用Brians单元的JNI方法，请使用Android.JNI.Toast并调用程序

toast('Your toastmessage string', youroptionaltoastduration);

您可以找到该组件，现在也可以找到

上的截屏视频链接

https://www.cybertribe.de/info/components/fmx/toast/

Answer 2

实际上有一种更简单的方法：创建自己的吐司单位。

unit toast_unit;

interface

uses
  System.SysUtils, System.Types, System.UITypes, System.Classes,
  System.Variants, FMX.Types, FMX.Controls, FMX.Forms,
  FMX.Graphics, FMX.Dialogs, FMX.StdCtrls,
  FMX.Controls.Presentation;

type
  TToastLength = (LongToast, ShortToast);

type
  TForm1 = class(TForm)
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$IFDEF ANDROID}

uses
  Android.JNI.Toast,
  Androidapi.Helpers,
  FMX.Helpers.Android;

  procedure Toast(const Msg: string; duration: TToastLength);
  var
    ToastLength: Integer;
  begin
    if duration = ShortToast then
      ToastLength := TJToast.JavaClass.LENGTH_SHORT
    else
      ToastLength := TJToast.JavaClass.LENGTH_LONG;

    CallInUiThread (
      procedure
      begin
        TJToast.JavaClass.makeText (SharedActivityContext,
            StrToJCharSequence(Msg), ToastLength).show
      end
    );
  end;

{$ENDIF}


{$R *.fmx}

procedure TForm1.Button1Click(Sender: TObject);
begin
  {$IFDEF ANDROID}
    Toast ('aha', LongToast);
  {$ENDIF}
end;

end.

Answer 3

在Delphi 10.2.3 Tokyo中，我使用了以下方法：

uses Androidapi.JNI.Widget;  
  ....  
  procedure TfrmBeaconClient.ShowMessageToast(const pMsg:String; pDuration :
                    Integer);
  begin
    TThread.Synchronize(nil, procedure begin
      TJToast.JavaClass.makeText(TAndroidHelper.Context, 
        StrToJCharSequence(pMsg), pDuration).show
    end);
  end;


  procedure ....
  begin
  ...    
    ShowmessageToast('Logged in',TJToast.JavaClass.LENGTH_LONG);
  ....

  end;

Answer 4

unit UI.Toast.Android;

// Java bridge class imported by hand by Brian Long (http://blong.com)
interface

{$IFDEF ANDROID}

uses
  UI.Toast,
  Androidapi.JNIBridge,
  Androidapi.JNI.JavaTypes,
  Androidapi.JNI.GraphicsContentViewText;
{$ENDIF}

{$IFDEF ANDROID}
type
  JToast = interface;

  JToastClass = interface(JObjectClass)
    ['{69E2D233-B9D3-4F3E-B882-474C8E1D50E9}']
    { Property methods }
    function _GetLENGTH_LONG: Integer; cdecl;
    function _GetLENGTH_SHORT: Integer; cdecl;
    { Methods }
    function init(context: JContext): JToast; cdecl; overload;
    function makeText(context: JContext; text: JCharSequence; duration: Integer)
      : JToast; cdecl;
    { Properties }
    property LENGTH_LONG: Integer read _GetLENGTH_LONG;
    property LENGTH_SHORT: Integer read _GetLENGTH_SHORT;
  end;

  [JavaSignature('android/widget/Toast')]
  JToast = interface(JObject)
    ['{FD81CC32-BFBC-4838-8893-9DD01DE47B00}']
    { Methods }
    procedure cancel; cdecl;
    function getDuration: Integer; cdecl;
    function getGravity: Integer; cdecl;
    function getHorizontalMargin: Single; cdecl;
    function getVerticalMargin: Single; cdecl;
    function getView: JView; cdecl;
    function getXOffset: Integer; cdecl;
    function getYOffset: Integer; cdecl;
    procedure setDuration(value: Integer); cdecl;
    procedure setGravity(gravity, xOffset, yOffset: Integer); cdecl;
    procedure setMargin(horizontalMargin, verticalMargin: Single); cdecl;
    procedure setText(s: JCharSequence); cdecl;
    procedure setView(view: JView); cdecl;
    procedure show; cdecl;
  end;

  TJToast = class(TJavaGenericImport<JToastClass, JToast>)
  end;

procedure Toast(const Msg: string; duration: TToastLength = ShortToast);

{$ENDIF}

implementation

{$IFDEF ANDROID}

uses
  {$IF CompilerVersion > 27}Androidapi.Helpers, {$ENDIF}
  FMX.Helpers.Android;

procedure Toast(const Msg: string; duration: TToastLength);
var
  ToastLength: Integer;
begin
  if duration = ShortToast then
    ToastLength := TJToast.JavaClass.LENGTH_SHORT
  else
    ToastLength := TJToast.JavaClass.LENGTH_LONG;
  CallInUiThread(
    procedure
    begin
      TJToast.JavaClass.makeText(
        {$IF CompilerVersion > 27}
        TAndroidHelper.Context,
        {$ELSE}
        SharedActivityContext,
        {$ENDIF}
        StrToJCharSequence(Msg),
        ToastLength).show
    end);
end;
{$ENDIF}

end.

https://github.com/yangyxd/FMXUI/blob/master/source/UI.Toast.pas https://github.com/yangyxd/FMXUI/blob/master/source/UI.Toast.Android.pas

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