How To Know When App Goes To Background

  

Introduction

Note, the solution provided in the link below did not help me solve my problem:

How to detect when an Android app goes to the background and come back to the foreground

Hallo Stack Overflow Community

I am trying to create simple Android app that allows a user to select text and upper or lower case it, along with a function to remove extra spaces. My app has only three objects, namely two of TButton and one of TMemo. I have encountered a problem with the TMemoand the virtual keyboard. Whenever the virtual keyboard pops up, it displays over the bottom of the TMemo. I have managed to solve this problem by working with the OnVirtualKeyboardHiddenand OnVirtualKeybaordShown event handlers of the TForm. Here’s how I did it:

procedure TfrmEditor.FormVirtualKeyboardHidden(Sender: TObject;
KeyboardVisible: Boolean; const Bounds: TRect);
begin
memInput.Align := memInput.Align.alClient;
end;

procedure TfrmEditor.FormVirtualKeyboardShown(Sender: TObject;
KeyboardVisible: Boolean; const Bounds: TRect);
begin
if memInput.Align <> memInput.Align.alTop then
begin
memInput.Align := memInput.Align.alTop;
memInput.Height := memInput.Height – Bounds.Height;
end;
end;

Problem

So here’s my problem: whenever the virtual keyboard is shown and I switch to another app and switch back, the virtual keyboard is hidden but the TMemo TAlignLayout ins’t restored back to alClient.

If anyone can help me with this TMemo and virtual keyboard problem I would really appreciate it.

Thank you in advance!

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