Android – QDAC数据访问组件网站

[教程]使用 Delphi 获取当前操作系统的时区

2019-04-112019-04-11 • C++ Builder、Delphi、教程 • 暂无评论 • swish •浏览 2,375 次

嗯，这段代码实际上已经集成到 QString 单元了，所以你可以直接调用 GetTimezone 函数来获得时区了。用 GetTimezoneText 可以获得时区的字符串表示。代码不长，用起来也简单，它实际上返回的时区对应的分钟数，比如北京时间是480，也就是 8 小时，其它依次类推。使用 GetTimezonTe

[FMX] FMX.Graphics.Android 中对 GIF 判断的问题的修正

2016-09-052016-09-05 • Android、C++ Builder、Delphi、更新 • 1 条评论 • swish •浏览 2,493 次

关于这个 Bug 的详情，大家可以参考：https://quality.embarcadero.com/browse/RSP-12424 Berlin 中的 FMX.Graphics.Android 实现的原始代码如下：

class function TBitmapCodecAndroid.IsGIFStream(const Stream: TStream): Boolean;
const
  IDCharCount = 3;
var
  PrevPosition: Int64;
  Builder: TStringBuilder;
  I: Integer;
  Value: Char;
begin
  if (Stream = nil) or (Stream.Size < IDCharCount) then
    Exit(False);

  PrevPosition := Stream.Position;
  try
    Builder := TStringBuilder.Create(IDCharCount);
    try
      for I := 0 to 2 do
      begin
        Stream.ReadBuffer(Value, 1);
        Builder.Append(Value);
      end;

      Result := SameText(Builder.ToString, 'GIF');
    finally
      Builder.Free;
    end;
  finally
    Stream.Position := PrevPosition;
  end;
end;

class function TBitmapCodecAndroid.IsGIFStream(const Stream: TStream): Boolean;

const

IDCharCount = 3;

var

PrevPosition: Int64;

Builder: TStringBuilder;

I: Integer;

Value: Char;

begin

if (Stream = nil) or (Stream.Size < IDCharCount) then

Exit(False);

PrevPosition := Stream.Position;

try

Builder := TStringBuilder.Create(IDCharCount);

try

for I := 0 to 2 do

begin

Stream.ReadBuffer(Value, 1);

Builder.Append(Value);

end;

Result := SameText(Builder.ToString, 'GIF');

finally

Builder.Free;

end;

finally

Stream.Position := PrevPosition;

end;

存在的问题：第一个判定不完善，

[杂谈]！错误！在 Android 下这么用 ShowModal 是错误的！

2016-03-032016-03-04 • Android、C++ Builder、Delphi、杂谈 • 1 条评论 • swish •浏览 5,300 次

1、直接调用 ShowModal 肯定是不行的，Android 下直接抛出异常。而 iOS、OSX、Windows 下是没问题的。 2、像下面这样用循环模拟 ShowModal 也是不行的，如果只是这么简单，Delphi 早就实现了。这个代码在我手机上实测存在的主要问题就是你按回退键没响应。 [crayon-62c6a

[FMX] Android APP 启动黑屏优化补丁

2016-01-172016-01-17 • Android、Delphi • 暂无评论 • 爱音乐的孩子是小白 •浏览 4,111 次

使用说明 *************************************************** Android APP 启动黑屏优化补丁作者： Swish, YangYxd 2016.01.16 Version: 1.0.0 QDAC官方群: 250530692 ******************

[FMX] 在 Delphi/C++ Builder 中开发低功耗蓝牙设备

2015-12-24 • Android、C++ Builder、Delphi、杂谈 • 1 条评论 • swish •浏览 6,512 次

从蓝牙4.0开始定义了不同类型的蓝牙协议，原来的蓝牙协议改称为经典蓝牙（Classic Bluetooth），新的低功耗版本被称为BLE(Bluetooth Low Energy)。要在 Delphi 或 C++ Builder 中使用低功能蓝牙，需要做以下步骤： 1、在你的工程中放一个 TBlueToothLE 组

密码保护：[译]RAD Studio 移动开发（西雅图版）- 前言

2015-12-032015-12-04 • Android、C++ Builder、Delphi • 要查看留言请输入您的密码。 • swish •浏览 1,921 次

无法提供摘要。这是一篇受保护的文章。

Android 反编译工具

2015-04-10 • Delphi • 暂无评论 • 爱音乐的孩子是小白 •浏览 2,589 次

想必玩安卓的童鞋大多都知道，安卓的APK安装包是可以反编译出源代码的，如果开发人员发布时没有对其混淆等加密处理，反编译出来的代码几乎与真实的源代码一模一样。想要反编译apk，需要用到apktool.jar，目前它已经更新了到了apktool_2.0.0rc6了。apktool.jar通过命令行即可反编译apk，而且网

[FMX] Android 按键定义

2015-02-04 • Android、杂谈 • 暂无评论 • swish •浏览 2,304 次

在FMX中，默认的按键定义位于 FMX.UITypes 文件中，以 vk 打头，如 vkReturn 代表回车键，但其定义并不全面。因此，我们找到 Android 源码中相关的列表，列出来供大家参考：

#define KEY_RESERVED 0
#define KEY_ESC 1
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define KEY_1 2
#define KEY_2 3
#define KEY_3 4
#define KEY_4 5
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define KEY_5 6
#define KEY_6 7
#define KEY_7 8
#define KEY_8 9
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define KEY_9 10
#define KEY_0 11
#define KEY_MINUS 12
#define KEY_EQUAL 13
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define KEY_BACKSPACE 14
#define KEY_TAB 15
#define KEY_Q 16
#define KEY_W 17
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define KEY_E 18
#define KEY_R 19
#define KEY_T 20
#define KEY_Y 21
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define KEY_U 22
#define KEY_I 23
#define KEY_O 24
#define KEY_P 25
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define KEY_LEFTBRACE 26
#define KEY_RIGHTBRACE 27
#define KEY_ENTER 28
#define KEY_LEFTCTRL 29
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define KEY_A 30
#define KEY_S 31
#define KEY_D 32
#define KEY_F 33
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define KEY_G 34
#define KEY_H 35
#define KEY_J 36
#define KEY_K 37
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define KEY_L 38
#define KEY_SEMICOLON 39
#define KEY_APOSTROPHE 40
#define KEY_GRAVE 41
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define KEY_LEFTSHIFT 42
#define KEY_BACKSLASH 43
#define KEY_Z 44
#define KEY_X 45
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define KEY_C 46
#define KEY_V 47
#define KEY_B 48
#define KEY_N 49
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define KEY_M 50
#define KEY_COMMA 51
#define KEY_DOT 52
#define KEY_SLASH 53
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define KEY_RIGHTSHIFT 54
#define KEY_KPASTERISK 55
#define KEY_LEFTALT 56
#define KEY_SPACE 57
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define KEY_CAPSLOCK 58
#define KEY_F1 59
#define KEY_F2 60
#define KEY_F3 61
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define KEY_F4 62
#define KEY_F5 63
#define KEY_F6 64
#define KEY_F7 65
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define KEY_F8 66
#define KEY_F9 67
#define KEY_F10 68
#define KEY_NUMLOCK 69
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define KEY_SCROLLLOCK 70
#define KEY_KP7 71
#define KEY_KP8 72
#define KEY_KP9 73
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define KEY_KPMINUS 74
#define KEY_KP4 75
#define KEY_KP5 76
#define KEY_KP6 77
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define KEY_KPPLUS 78
#define KEY_KP1 79
#define KEY_KP2 80
#define KEY_KP3 81
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define KEY_KP0 82
#define KEY_KPDOT 83
#define KEY_ZENKAKUHANKAKU 85
#define KEY_102ND 86
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define KEY_F11 87
#define KEY_F12 88
#define KEY_RO 89
#define KEY_KATAKANA 90
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define KEY_HIRAGANA 91
#define KEY_HENKAN 92
#define KEY_KATAKANAHIRAGANA 93
#define KEY_MUHENKAN 94
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define KEY_KPJPCOMMA 95
#define KEY_KPENTER 96
#define KEY_RIGHTCTRL 97
#define KEY_KPSLASH 98
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define KEY_SYSRQ 99
#define KEY_RIGHTALT 100
#define KEY_LINEFEED 101
#define KEY_HOME 102
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define KEY_UP 103
#define KEY_PAGEUP 104
#define KEY_LEFT 105
#define KEY_RIGHT 106
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define KEY_END 107
#define KEY_DOWN 108
#define KEY_PAGEDOWN 109
#define KEY_INSERT 110
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define KEY_DELETE 111
#define KEY_MACRO 112
#define KEY_MUTE 113
#define KEY_VOLUMEDOWN 114
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define KEY_VOLUMEUP 115
#define KEY_POWER 116  
#define KEY_KPEQUAL 117
#define KEY_KPPLUSMINUS 118
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define KEY_PAUSE 119
#define KEY_SCALE 120  
#define KEY_KPCOMMA 121
#define KEY_HANGEUL 122
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define KEY_HANGUEL KEY_HANGEUL
#define KEY_HANJA 123
#define KEY_YEN 124
#define KEY_LEFTMETA 125
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define KEY_RIGHTMETA 126
#define KEY_COMPOSE 127
#define KEY_STOP 128  
#define KEY_AGAIN 129
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define KEY_PROPS 130  
#define KEY_UNDO 131  
#define KEY_FRONT 132
#define KEY_COPY 133  
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define KEY_OPEN 134  
#define KEY_PASTE 135  
#define KEY_FIND 136  
#define KEY_CUT 137  
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define KEY_HELP 138  
#define KEY_MENU 139  
#define KEY_CALC 140  
#define KEY_SETUP 141
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define KEY_SLEEP 142  
#define KEY_WAKEUP 143  
#define KEY_FILE 144  
#define KEY_SENDFILE 145
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define KEY_DELETEFILE 146
#define KEY_XFER 147
#define KEY_PROG1 148
#define KEY_PROG2 149
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define KEY_WWW 150  
#define KEY_MSDOS 151
#define KEY_COFFEE 152  
#define KEY_SCREENLOCK KEY_COFFEE
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define KEY_DIRECTION 153
#define KEY_CYCLEWINDOWS 154
#define KEY_MAIL 155
#define KEY_BOOKMARKS 156  
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define KEY_COMPUTER 157
#define KEY_BACK 158  
#define KEY_FORWARD 159  
#define KEY_CLOSECD 160
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define KEY_EJECTCD 161
#define KEY_EJECTCLOSECD 162
#define KEY_NEXTSONG 163
#define KEY_PLAYPAUSE 164
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define KEY_PREVIOUSSONG 165
#define KEY_STOPCD 166
#define KEY_RECORD 167
#define KEY_REWIND 168
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define KEY_PHONE 169  
#define KEY_ISO 170
#define KEY_CONFIG 171  
#define KEY_HOMEPAGE 172  
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define KEY_REFRESH 173  
#define KEY_EXIT 174  
#define KEY_MOVE 175
#define KEY_EDIT 176
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define KEY_SCROLLUP 177
#define KEY_SCROLLDOWN 178
#define KEY_KPLEFTPAREN 179
#define KEY_KPRIGHTPAREN 180
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define KEY_NEW 181  
#define KEY_REDO 182  
#define KEY_F13 183
#define KEY_F14 184
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define KEY_F15 185
#define KEY_F16 186
#define KEY_F17 187
#define KEY_F18 188
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define KEY_F19 189
#define KEY_F20 190
#define KEY_F21 191
#define KEY_F22 192
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define KEY_F23 193
#define KEY_F24 194
#define KEY_PLAYCD 200
#define KEY_PAUSECD 201
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define KEY_PROG3 202
#define KEY_PROG4 203
#define KEY_DASHBOARD 204  
#define KEY_SUSPEND 205
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define KEY_CLOSE 206  
#define KEY_PLAY 207
#define KEY_FASTFORWARD 208
#define KEY_BASSBOOST 209
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define KEY_PRINT 210  
#define KEY_HP 211
#define KEY_CAMERA 212
#define KEY_SOUND 213
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define KEY_QUESTION 214
#define KEY_EMAIL 215
#define KEY_CHAT 216
#define KEY_SEARCH 217
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define KEY_CONNECT 218
#define KEY_FINANCE 219  
#define KEY_SPORT 220
#define KEY_SHOP 221
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define KEY_ALTERASE 222
#define KEY_CANCEL 223  
#define KEY_BRIGHTNESSDOWN 224
#define KEY_BRIGHTNESSUP 225
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define KEY_MEDIA 226
#define KEY_SWITCHVIDEOMODE 227  
#define KEY_KBDILLUMTOGGLE 228
#define KEY_KBDILLUMDOWN 229
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define KEY_KBDILLUMUP 230
#define KEY_SEND 231  
#define KEY_REPLY 232  
#define KEY_FORWARDMAIL 233  
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define KEY_SAVE 234  
#define KEY_DOCUMENTS 235
#define KEY_BATTERY 236
#define KEY_BLUETOOTH 237
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define KEY_WLAN 238
#define KEY_UWB 239
#define KEY_UNKNOWN 240
#define KEY_VIDEO_NEXT 241  
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define KEY_VIDEO_PREV 242  
#define KEY_BRIGHTNESS_CYCLE 243  
#define KEY_BRIGHTNESS_ZERO 244  
#define KEY_DISPLAY_OFF 245  
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define KEY_WIMAX 246
#define KEY_RFKILL 247  
#define KEY_MICMUTE 248

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#define KEY_RESERVED 0

#define KEY_ESC 1