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androiddelphidelphi-xe8android-hardware

How to detect if the device has hardware BACK and MENU keys in DELPHI

Is there a way how to detect if the user has access to the device BACK and MENU keys?

In ANDROID it's a simply code:

boolean hasMenuKey = ViewConfiguration.get(context).hasPermanentMenuKey();
boolean hasBackKey = KeyCharacterMap.deviceHasKey(KeyEvent.KEYCODE_BACK);

But how do it in DELPHI?

Solution

  • To determine the presence of a hardware keys, this method is the easiest:

    .
.
uses
  Androidapi.KeyCodes,
  Androidapi.JNI.GraphicsContentViewText,
.
.
  TJKeyCharacterMap.JavaClass.deviceHasKey(AKEYCODE_BACK) //To detect hardware BACK
  TJKeyCharacterMap.JavaClass.deviceHasKey(AKEYCODE_MENU) //To detect hardware MENU
.
.

    Result for deviceHasKey is Boolean.

    All keycode constants can be found in unit Androidapi.KeyCodes.