Android实例-消息框(XE8+小米2)

方法一支持。

方法二与方法三都是三方单元，功能相同。

方法4与方法5报错，提示平台不支持。

第三方单元一：

 1 unit Android.JNI.Toast;
 2 
 3 // Java bridge class imported by hand by Brian Long (http://blong.com)
 4 interface
 5 
 6 {$IFDEF ANDROID}
 7 
 8 uses
 9  Androidapi.Helpers,
10  Androidapi.JNIBridge,
11  Androidapi.JNI.JavaTypes,
12  Androidapi.JNI.GraphicsContentViewText;
13 {$ENDIF}
14 {$IFDEF ANDROID}
15 
16 type
17  TToastLength = (LongToast, ShortToast);
18 
19 JToast = interface;
20 
21 JToastClass = interface(JObjectClass)
22  ['{69E2D233-B9D3-4F3E-B882-474C8E1D50E9}']
23  { Property methods }
24  function _GetLENGTH_LONG: Integer; cdecl;
25  function _GetLENGTH_SHORT: Integer; cdecl;
26  { Methods }
27  function init(context: JContext): JToast; cdecl; overload;
28  function makeText(context: JContext; text: JCharSequence; duration: Integer)
29  : JToast; cdecl;
30  { Properties }
31  property LENGTH_LONG: Integer read _GetLENGTH_LONG;
32  property LENGTH_SHORT: Integer read _GetLENGTH_SHORT;
33  end;
34 
35 [JavaSignature('android/widget/Toast')]
36  JToast = interface(JObject)
37  ['{FD81CC32-BFBC-4838-8893-9DD01DE47B00}']
38  { Methods }
39  procedure cancel; cdecl;
40  function getDuration: Integer; cdecl;
41  function getGravity: Integer; cdecl;
42  function getHorizontalMargin: Single; cdecl;
43  function getVerticalMargin: Single; cdecl;
44  function getView: JView; cdecl;
45  function getXOffset: Integer; cdecl;
46  function getYOffset: Integer; cdecl;
47  procedure setDuration(value: Integer); cdecl;
48  procedure setGravity(gravity, xOffset, yOffset: Integer); cdecl;
49  procedure setMargin(horizontalMargin, verticalMargin: Single); cdecl;
50  procedure setText(s: JCharSequence); cdecl;
51  procedure setView(view: JView); cdecl;
52  procedure show; cdecl;
53  end;
54 
55 TJToast = class(TJavaGenericImport<JToastClass, JToast>)
56  end;
57 
58 procedure Toast(const Msg: string; duration: TToastLength = ShortToast);
59 
60 {$ENDIF}
61 
62 implementation
63 
64 {$IFDEF ANDROID}
65 
66 uses
67  FMX.Helpers.Android;
68 
69 procedure Toast(const Msg: string; duration: TToastLength);
70 var
71  ToastLength: Integer;
72 begin
73  if duration = ShortToast then
74  ToastLength := TJToast.JavaClass.LENGTH_SHORT
75  else
76  ToastLength := TJToast.JavaClass.LENGTH_LONG;
77  CallInUiThread(
78  procedure
79  begin
80  TJToast.JavaClass.makeText(SharedActivityContext, StrToJCharSequence(Msg),
81  ToastLength).show
82  end);
83 end;
84 {$ENDIF}
85 
86 end.

第三方单元二：

  1 {***************************************************************************}
  2 {                                                                           }
  3 {       功能：Android Toast提示消息框                                         }
  4 {       名称：Androidapi.JNI.Widget.Toast.pas                               }
  5 {       版本：1.0                                                           }
  6 {       环境：Win7 Sp1 64bit                                                }
  7 {       工具：Delphi XE7                                                    }
  8 {       日期：2014-11-23 19:45:35                                           }
  9 {       用法：TToast.Show(MessageText, isLongHint)                          }
 10 {--------------------------------------------------------------------------}
 11 {       原版作者：ying32                                                     }
 12 {       QQ：396506155                                                       }
 13 {       MSN ：ying_32@live.cn                                               }
 14 {       E-mail：yuanfen3287@vip.qq.com                                      }
 15 {       Website：http://blog.csdn.net/zyjying520/article/details/26158941   }
 16 {       版权所有 (C) 2013-2013 ying32.tk All Rights Reserved                 }
 17 {---------------------------------------------------------------------------}
 18 {       修改者：tht2009                                                      }
 19 {       改动：1、去掉注释掉的方法                                               }
 20 {            2、移动FMX.Helpers.Android引用声明到实现区                         }
 21 {            3、增加Androidapi.Helpers引用                                    }
 22 {                                                                           }
 23 {***************************************************************************}
 24 
 25 unit Androidapi.JNI.Widget.Toast;
 26 
 27 interface
 28 
 29 uses
 30   Androidapi.JNIBridge,
 31   Androidapi.JNI.JavaTypes,
 32   Androidapi.JNI.GraphicsContentViewText;
 33 
 34 type
 35   JToast = interface;//android.widget.Toast
 36 
 37   JToastClass = interface(JObjectClass)
 38   ['{CF455B66-683D-41F9-B386-0C49E42D4F92}']
 39     {Property Methods}
 40     function _GetLENGTH_LONG: Integer;
 41     function _GetLENGTH_SHORT : Integer;
 42     {Methods}
 43     // public Toast (Context context)
 44     function init(context: JContext): JToast; cdecl;
 45     // public static Toast makeText (Context context, int resId, int duration)
 46     function makeText(context: JContext; resId: Integer; duration: Integer): JToast;cdecl;overload;
 47     // public static Toast makeText (Context context, CharSequence text, int duration)
 48     function makeText(context: JContext; text: JCharSequence; duration: Integer): JToast;cdecl;overload;
 49     {Properties}
 50     property LENGTH_LONG: Integer read _GetLENGTH_LONG;
 51     property LENGTH_SHORT: Integer read _GetLENGTH_SHORT;
 52   end;
 53 
 54   [JavaSignature('android/widget/Toast')]
 55   JToast = interface(JObject)
 56   ['{4A284317-000C-4048-8674-C475F505CFAF}']
 57     {Methods}
 58     // public void cancel ()
 59     procedure cancel;cdecl;
 60     // public int getDuration ()
 61     function getDuration: Integer; cdecl;
 62     // public int getGravity ()
 63     function getGravity: Integer; cdecl;
 64     // public float getHorizontalMargin ()
 65     function getHorizontalMargin: Single; cdecl;
 66     // public float getVerticalMargin ()
 67     function getVerticalMargin: Single; cdecl;
 68     // public View getView ()
 69     function getView: JView; cdecl;
 70     // public int getXOffset ()
 71     function getXOffset: Integer; cdecl;
 72     // public int getYOffset ()
 73     function getYOffset: Integer; cdecl;
 74     // public void setDuration (int duration)
 75     procedure setDuration(duration: Integer); cdecl;
 76     // public void setGravity (int gravity, int xOffset, int yOffset)
 77     procedure setGravity(gravity, xOffset, yOffset: Integer);cdecl;
 78     // public void setMargin (float horizontalMargin, float verticalMargin)
 79     procedure setMargin(horizontalMargin, verticalMargin: Single);cdecl;
 80     // public void setText (int resId)
 81     procedure setText(resId: Integer);cdecl;overload;
 82     // public void setText (CharSequence s)
 83     procedure setText(s: JCharSequence);cdecl;overload;
 84     // public void setView (View view)
 85     procedure setView(view: JView);cdecl;
 86     // public void show ()
 87     procedure show;cdecl;
 88   end;
 89 
 90   TJToast = class(TJavaGenericImport<JToastClass, JToast>) end;
 91 
 92   { TToast }
 93   TToast = class
 94   public
 95     class procedure Show(const text: string; LongHint: Boolean = False);
 96   end;
 97 
 98 implementation
 99 
100 uses FMX.Helpers.Android, Androidapi.Helpers;
101 
102 { TToast }
103 
104 class procedure TToast.Show(const text: string; LongHint: Boolean);
105 var
106   LDuration: Integer;
107 begin
108    CallInUIThread
109    (
110      procedure
111      begin
112        case LongHint of
113          True  : LDuration := TJToast.JavaClass.LENGTH_LONG;
114          False : LDuration := TJToast.JavaClass.LENGTH_SHORT;
115        end;
116        TJToast.JavaClass.makeText(SharedActivityContext, StrToJCharSequence(text), LDuration).show;
117      end
118    );
119 end;
120 
121 end.

应用单元：

 1 unit Unit1;
 2 
 3 interface
 4 
 5 uses
 6   System.SysUtils, System.Types, System.UITypes, System.Classes, System.Variants,
 7   FMX.Types, FMX.Controls, FMX.Forms, FMX.Graphics, FMX.Dialogs,
 8   FMX.Controls.Presentation, FMX.StdCtrls;
 9 
10 type
11   TForm1 = class(TForm)
12     Button1: TButton;
13     Button2: TButton;
14     Button3: TButton;
15     Button4: TButton;
16     Button5: TButton;
17     Button6: TButton;
18     Button7: TButton;
19     procedure Button1Click(Sender: TObject);
20     procedure Button2Click(Sender: TObject);
21     procedure Button3Click(Sender: TObject);
22     procedure Button4Click(Sender: TObject);
23     procedure Button5Click(Sender: TObject);
24     procedure Button6Click(Sender: TObject);
25     procedure Button7Click(Sender: TObject);
26   private
27     { Private declarations }
28   public
29     { Public declarations }
30   end;
31 
32 var
33   Form1: TForm1;
34 
35 implementation
36 
37 uses
38   Android.JNI.Toast, Androidapi.JNI.Widget.Toast;
39 {$R *.fmx}
40 {$R *.NmXhdpiPh.fmx ANDROID}
41 
42 procedure TForm1.Button1Click(Sender: TObject);
43 begin
44   ShowMessage('与原来的一样哦！'); //消息提示方法一
45 end;
46 
47 procedure TForm1.Button2Click(Sender: TObject);
48 begin
49   Toast('消息提示方法二', LongToast);
50 end;
51 
52 procedure TForm1.Button3Click(Sender: TObject);
53 begin
54   Toast('消息提示方法二', ShortToast);
55 end;
56 
57 procedure TForm1.Button4Click(Sender: TObject);
58 begin
59   TToast.Show('消息提示方法3。', False);
60 end;
61 
62 procedure TForm1.Button5Click(Sender: TObject);
63 begin
64   TToast.Show('消息提示方法3。', True);
65 end;
66 
67 procedure TForm1.Button6Click(Sender: TObject);
68 begin
69   if MessageDlg('你喜欢我吗？', TMsgDlgType.mtConfirmation,
70   [TMsgDlgBtn.mbYes, TMsgDlgBtn.mbNo], -1) = mrYes then
71   begin
72 
73   end;
74 end;
75 
76 procedure TForm1.Button7Click(Sender: TObject);
77 var
78   msresult: string;
79 begin
80   msresult := FMX.Dialogs.InputBox('询问', '你多大了？', '我 10 岁了。');
81   ShowMessage('你输入的是:' + msresult);
82 end;
83 
84 end.

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原文地址：https://www.cnblogs.com/FKdelphi/p/4690020.html