README

FMXVibration

Small Delphi vibration wrapper for Android and iOS. Call on the frontend thread.

if VibrationSupported then
  TryVibrate(40, 128); // milliseconds, intensity 1..255
CancelVibration;

Vibrate(Duration) remains compatible with existing callers. Zero duration or zero intensity cancels the current Android effect and does not start another. TryVibrate returns false if unavailable or a native request fails. This does not guarantee a physical effect: system settings may suppress vibrations.

Android needs android.permission.VIBRATE in the application manifest. API 31+ uses VibratorManager, API 26+ uses VibrationEffect, and earlier supported APIs use the legacy duration overload. Amplitude is used when the motor supports it; otherwise pulse duration approximates intensity. Effects are finite and can be stopped using CancelVibration (CanCancelVibration returns true).

iOS AudioServices produces a fixed system vibration: duration and intensity cannot be selected and the pulse cannot be cancelled. VibrationSupported reports API availability there; iPads, iPods and simulators may ignore requests. Use one request per event rather than continuously renewing a rumble motor.

Other platforms report unsupported and perform no action.