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Are static variable truly "global" (system-wide) in Android?


Are static variable truly "global" (system-wide) in Android?

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Are static variable truly "global" (system-wide) in Android?
Tag : android , By : beng
Date : November 29 2020, 09:01 AM

wish of those help Static fields are accessible to all the classes running in the same process. If the Service, Application, BroadcastReceiver, ContentProvider or Activity is running in a separate process then it will have a different memory space, thus won't see static fields from the other processes. You can force a component to run on another process by specifying its' it in the AndroidManisfest (e.g. android:process="string" http://developer.android.com/guide/topics/manifest/receiver-element.html)

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Delphi 2007 - Systemwide Hot key is NOT "system-wide" if setting "MainFormOnTaskBar := True"


Tag : delphi , By : Justin Bowers
Date : March 29 2020, 07:55 AM
seems to work fine TApplication.MainFormOnTaskbar has no effect on system-wide hotkeys at all. I can positively confirm that. I am able to receive WM_HOTKEY messages regardless of what MainFormOnTaskbar is set to, regardless of whether the app is focused or not, etc. So whatever you are seeing is not what you think is happening.
Most likely, the Form's Handle is simply being recreated behind your back after you have called RegisterHotKey(), so you lose the HWND that would receive the WM_HOTKEY messages. Instead of using the OnCreate event, you should override the Form's CreateWindowHandle() and DestroyWindowHandle() methods instead to ensure the hot key is always registered for the Form's current HWND no matter what happens to it (you should always do that whenever you tie any kind of data to the Form's Handle), eg:
type
  TForm1 = class(TForm)
  private
    HotKey_xyz: WORD;
    procedure WMHotKey(var Message: TMessage); message WM_HOTKEY;
  protected
    procedure CreateWindowHandle(const Params: TCreateParams); override;
    procedure DestroyWindowHandle; override;
  end;

procedure TForm1.CreateWindowHandle(const Params: TCreateParams);
begin
  inherited;
  HotKey_xyz := GlobalAddAtom('Hotkey_xyz'); 
  if HotKey_xyz <> 0 then
    RegisterHotKey(Self.Handle, HotKey_xyz, MOD_CONTROL, VK_F12);
end;

procedure TForm1.DestroyWindowHandle(const Params: TCreateParams);
begin
  if HotKey_xyz <> 0 then
  begin
    UnregisterHotKey(Self.Handle, HotKey_xyz);
    GlobalDeleteAtom(HotKey_xyz);
    HotKey_xyz := 0;
  end;
  inherited;
end;

procedure TForm1.WMHotKey(var Message: TMessage);
begin
  ...
end;
type
  TForm1 = class(TForm)
    procedure FormCreate(Sender: TObject);
    procedure FormDestroy(Sender: TObject);
  private
    HotKey_xyz: WORD;
    HotKeyWnd: HWND;
    procedure HotKeyWndProc(var Message: TMessage);
  end;

procedure TForm1.FormCreate(Sender: TObject);
begin
  HotKeyWnd := AllocateHwnd(HotKeyWndProc);
  HotKey_xyz := GlobalAddAtom('Hotkey_xyz'); 
  if HotKey_xyz <> 0 then
    RegisterHotKey(HotKeyWnd, HotKey_xyz, MOD_CONTROL, VK_F12);
end;

procedure TForm1.FormDestroy(Sender: TObject);
begin
  if HotKey_xyz <> 0 then
  begin
    UnregisterHotKey(HotKeyWnd, HotKey_xyz);
    GlobalDeleteAtom(HotKey_xyz);
    HotKey_xyz := 0;
  end;
  if HotKeyWnd <> 0 then
  begin
    DeallocateHWnd(HotKeyWnd);
    HotKeyWnd := 0;
  end;
end;

procedure TForm1.HotKeyWndProc(var Message: TMessage);
begin
  if Message.Msg = WM_HOTKEY then
  begin
    ...
  end else
    Message.Result := DefWindowProc(HotKeyWnd, Message.Msg, Message.WParam, Message.LParam);
end;

How to intercept system-wide "copy to clipboard" event in Android


Tag : android , By : kokok13
Date : March 29 2020, 07:55 AM
This might help you The necessary classes can be found in android.content.ClipboardManager. Use the OnPrimaryClipChangedListener interface to create a listener, and the addPrimaryClipChangedListener() method to set it as a listener.
Please note that it is android.content.ClipboardManager, and not android.text.ClipboardManager, which is the old text-only version which was deprecated in API Level 11.

Gradle/Groovy refer to "file-wide/global" variable from inside block


Tag : gradle , By : glisignoli
Date : March 29 2020, 07:55 AM
will be helpful for those in need In a gradle script, there's a Project instance in scope which everything delegates to. When you say version = '1.1.2' it's actually invoking
getProject().setVersion('1.1.2')
shadowJar {
    version = project.version
    ...
}

What is the difference between "GLOBAL" and "STATIC" variable in PHP?


Tag : php , By : user179271
Date : March 29 2020, 07:55 AM

How to set a global environment variable in .NET Core (user-wide or system-wide)


Tag : chash , By : user143729
Date : March 29 2020, 07:55 AM
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