Android Vibration for Unity 3D. Supports all API: 1 - 29 (auto detect), Amplitudes, Predefined Effects, both Legacy and >=26 APIs.

Vibration.cs

using System.Diagnostics.CodeAnalysis;
using UnityEngine;

// Dont forget to add "using RDG;" to the top of your script!
namespace RDG
{
    /// <summary>
    /// Class for controlling Vibration. Automatically initializes before scene is loaded.
    /// </summary>
    public static class Vibration
    {
        // Component Parameters
        public static logLevel LogLevel = logLevel.Disabled;

        // Vibrator References
        private static AndroidJavaObject vibrator = null;
        private static AndroidJavaClass vibrationEffectClass = null;
        private static int defaultAmplitude = 255;

        // Api Level
        private static int ApiLevel = 1;
        private static bool doesSupportVibrationEffect () => ApiLevel >= 26;    // available only from Api >= 26
        private static bool doesSupportPredefinedEffect () => ApiLevel >= 29;   // available only from Api >= 29

        #region Initialization
        private static bool isInitialized = false;

        [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.BeforeSceneLoad)]
        [SuppressMessage("Code quality", "IDE0051", Justification = "Called on scene load")]
        private static void Initialize ()
        {
            // Add APP VIBRATION PERMISSION to the Manifest
#if UNITY_ANDROID
            if (Application.isConsolePlatform) { Handheld.Vibrate(); }
#endif

            // load references safely
            if (isInitialized == false && Application.platform == RuntimePlatform.Android) {
                // Get Api Level
                using (AndroidJavaClass androidVersionClass = new AndroidJavaClass("android.os.Build$VERSION")) {
                    ApiLevel = androidVersionClass.GetStatic<int>("SDK_INT");
                }

                // Get UnityPlayer and CurrentActivity
                using (AndroidJavaClass unityPlayer = new AndroidJavaClass("com.unity3d.player.UnityPlayer"))
                using (AndroidJavaObject currentActivity = unityPlayer.GetStatic<AndroidJavaObject>("currentActivity")) {
                    if (currentActivity != null) {
                        vibrator = currentActivity.Call<AndroidJavaObject>("getSystemService", "vibrator");

                        // if device supports vibration effects, get corresponding class
                        if (doesSupportVibrationEffect()) {
                            vibrationEffectClass = new AndroidJavaClass("android.os.VibrationEffect");
                            defaultAmplitude = Mathf.Clamp(vibrationEffectClass.GetStatic<int>("DEFAULT_AMPLITUDE"), 1, 255);
                        }

                        // if device supports predefined effects, get their IDs
                        if (doesSupportPredefinedEffect()) {
                            PredefinedEffect.EFFECT_CLICK = vibrationEffectClass.GetStatic<int>("EFFECT_CLICK");
                            PredefinedEffect.EFFECT_DOUBLE_CLICK = vibrationEffectClass.GetStatic<int>("EFFECT_DOUBLE_CLICK");
                            PredefinedEffect.EFFECT_HEAVY_CLICK = vibrationEffectClass.GetStatic<int>("EFFECT_HEAVY_CLICK");
                            PredefinedEffect.EFFECT_TICK = vibrationEffectClass.GetStatic<int>("EFFECT_TICK");
                        }
                    }
                }

                logAuto("Vibration component initialized", logLevel.Info);
                isInitialized = true;
            }
        }
        #endregion

        #region Vibrate Public
        /// <summary>
        /// Vibrate for Milliseconds, with Amplitude (if available).
        /// If amplitude is -1, amplitude is Disabled. If -1, device DefaultAmplitude is used. Otherwise, values between 1-255 are allowed.
        /// If 'cancel' is true, Cancel() will be called automatically.
        /// </summary>
        public static void Vibrate (long milliseconds, int amplitude = -1, bool cancel = false)
        {
            string funcToStr () => string.Format("Vibrate ({0}, {1}, {2})", milliseconds, amplitude, cancel);

            Initialize(); // make sure script is initialized
            if (isInitialized == false) {
                logAuto(funcToStr() + ": Not initialized", logLevel.Warning);
            }
            else if (HasVibrator() == false) {
                logAuto(funcToStr() + ": Device doesn't have Vibrator", logLevel.Warning);
            }
            else {
                if (cancel) Cancel();
                if (doesSupportVibrationEffect()) {
                    // validate amplitude
                    amplitude = Mathf.Clamp(amplitude, -1, 255);
                    if (amplitude == -1) amplitude = 255; // if -1, disable amplitude (use maximum amplitude)
                    if (amplitude != 255 && HasAmplitudeControl() == false) { // if amplitude was set, but not supported, notify developer
                        logAuto(funcToStr() + ": Device doesn't have Amplitude Control, but Amplitude was set", logLevel.Warning);
                    }
                    if (amplitude == 0) amplitude = defaultAmplitude; // if 0, use device DefaultAmplitude

                    // if amplitude is not supported, use 255; if amplitude is -1, use systems DefaultAmplitude. Otherwise use user-defined value.
                    amplitude = HasAmplitudeControl() == false ? 255 : amplitude;
                    vibrateEffect(milliseconds, amplitude);
                    logAuto(funcToStr() + ": Effect called", logLevel.Info);
                }
                else {
                    vibrateLegacy(milliseconds);
                    logAuto(funcToStr() + ": Legacy called", logLevel.Info);
                }
            }
        }
        /// <summary>
        /// Vibrate Pattern (pattern of durations, with format Off-On-Off-On and so on).
        /// Amplitudes can be Null (for default) or array of Pattern array length with values between 1-255.
        /// To cause the pattern to repeat, pass the index into the pattern array at which to start the repeat, or -1 to disable repeating.
        /// If 'cancel' is true, Cancel() will be called automatically.
        /// </summary>
        public static void Vibrate (long[] pattern, int[] amplitudes = null, int repeat = -1, bool cancel = false)
        {
            string funcToStr () => string.Format("Vibrate (({0}), ({1}), {2}, {3})", arrToStr(pattern), arrToStr(amplitudes), repeat, cancel);

            Initialize(); // make sure script is initialized
            if (isInitialized == false) {
                logAuto(funcToStr() + ": Not initialized", logLevel.Warning);
            }
            else if (HasVibrator() == false) {
                logAuto(funcToStr() + ": Device doesn't have Vibrator", logLevel.Warning);
            }
            else {
                // check Amplitudes array length
                if (amplitudes != null && amplitudes.Length != pattern.Length) {
                    logAuto(funcToStr() + ": Length of Amplitudes array is not equal to Pattern array. Amplitudes will be ignored.", logLevel.Warning);
                    amplitudes = null;
                }
                // limit amplitudes between 1 and 255
                if (amplitudes != null) {
                    clampAmplitudesArray(amplitudes);
                }

                // vibrate
                if (cancel) Cancel();
                if (doesSupportVibrationEffect()) {
                    if (amplitudes != null && HasAmplitudeControl() == false) {
                        logAuto(funcToStr() + ": Device doesn't have Amplitude Control, but Amplitudes was set", logLevel.Warning);
                        amplitudes = null;
                    }
                    if (amplitudes != null) {
                        vibrateEffect(pattern, amplitudes, repeat);
                        logAuto(funcToStr() + ": Effect with amplitudes called", logLevel.Info);
                    }
                    else {
                        vibrateEffect(pattern, repeat);
                        logAuto(funcToStr() + ": Effect called", logLevel.Info);
                    }
                }
                else {
                    vibrateLegacy(pattern, repeat);
                    logAuto(funcToStr() + ": Legacy called", logLevel.Info);
                }
            }
        }

        /// <summary>
        /// Vibrate predefined effect (described in Vibration.PredefinedEffect). Available from Api Level >= 29.
        /// If 'cancel' is true, Cancel() will be called automatically.
        /// </summary>
        public static void VibratePredefined (int effectId, bool cancel = false)
        {
            string funcToStr () => string.Format("VibratePredefined ({0})", effectId);

            Initialize(); // make sure script is initialized
            if (isInitialized == false) {
                logAuto(funcToStr() + ": Not initialized", logLevel.Warning);
            }
            else if (HasVibrator() == false) {
                logAuto(funcToStr() + ": Device doesn't have Vibrator", logLevel.Warning);
            }
            else if (doesSupportPredefinedEffect() == false) {
                logAuto(funcToStr() + ": Device doesn't support Predefined Effects (Api Level >= 29)", logLevel.Warning);
            }
            else {
                if (cancel) Cancel();
                vibrateEffectPredefined(effectId);
                logAuto(funcToStr() + ": Predefined effect called", logLevel.Info);
            }
        }
        #endregion

        #region Public Properties & Controls
        public static long[] ParsePattern (string pattern)
        {
            if (pattern == null) return new long[0];
            pattern = pattern.Trim();
            string[] split = pattern.Split(',');

            long[] timings = new long[split.Length];
            for (int i = 0; i < split.Length; i++) {
                if (int.TryParse(split[i].Trim(), out int duration)) {
                    timings[i] = duration < 0 ? 0 : duration;
                }
                else {
                    timings[i] = 0;
                }
            }

            return timings;
        }

        /// <summary>
        /// Returns Android Api Level
        /// </summary>
        public static int GetApiLevel () => ApiLevel;
        /// <summary>
        /// Returns Default Amplitude of device, or 0.
        /// </summary>
        public static int GetDefaultAmplitude () => defaultAmplitude;

        /// <summary>
        /// Returns true if device has vibrator
        /// </summary>
        public static bool HasVibrator ()
        {
            return vibrator != null && vibrator.Call<bool>("hasVibrator");
        }
        /// <summary>
        /// Return true if device supports amplitude control
        /// </summary>
        public static bool HasAmplitudeControl ()
        {
            if (HasVibrator() && doesSupportVibrationEffect()) {
                return vibrator.Call<bool>("hasAmplitudeControl"); // API 26+ specific
            }
            else {
                return false; // no amplitude control below API level 26
            }
        }

        /// <summary>
        /// Tries to cancel current vibration
        /// </summary>
        public static void Cancel ()
        {
            if (HasVibrator()) {
                vibrator.Call("cancel");
                logAuto("Cancel (): Called", logLevel.Info);
            }
        }
        #endregion

        #region Vibrate Internal
        #region Vibration Callers
        private static void vibrateEffect (long milliseconds, int amplitude)
        {
            using (AndroidJavaObject effect = createEffect_OneShot(milliseconds, amplitude)) {
                vibrator.Call("vibrate", effect);
            }
        }
        private static void vibrateLegacy (long milliseconds)
        {
            vibrator.Call("vibrate", milliseconds);
        }

        private static void vibrateEffect (long[] pattern, int repeat)
        {
            using (AndroidJavaObject effect = createEffect_Waveform(pattern, repeat)) {
                vibrator.Call("vibrate", effect);
            }
        }
        private static void vibrateLegacy (long[] pattern, int repeat)
        {
            vibrator.Call("vibrate", pattern, repeat);
        }

        private static void vibrateEffect (long[] pattern, int[] amplitudes, int repeat)
        {
            using (AndroidJavaObject effect = createEffect_Waveform(pattern, amplitudes, repeat)) {
                vibrator.Call("vibrate", effect);
            }
        }
        private static void vibrateEffectPredefined (int effectId)
        {
            using (AndroidJavaObject effect = createEffect_Predefined(effectId)) {
                vibrator.Call("vibrate", effect);
            }
        }
        #endregion

        #region Vibration Effect
        /// <summary>
        /// Wrapper for public static VibrationEffect createOneShot (long milliseconds, int amplitude). API >= 26
        /// </summary>
        private static AndroidJavaObject createEffect_OneShot (long milliseconds, int amplitude)
        {
            return vibrationEffectClass.CallStatic<AndroidJavaObject>("createOneShot", milliseconds, amplitude);
        }
        /// <summary>
        /// Wrapper for public static VibrationEffect createPredefined (int effectId). API >= 29
        /// </summary>
        private static AndroidJavaObject createEffect_Predefined (int effectId)
        {
            return vibrationEffectClass.CallStatic<AndroidJavaObject>("createPredefined", effectId);
        }
        /// <summary>
        /// Wrapper for public static VibrationEffect createWaveform (long[] timings, int[] amplitudes, int repeat). API >= 26
        /// </summary>
        private static AndroidJavaObject createEffect_Waveform (long[] timings, int[] amplitudes, int repeat)
        {
            return vibrationEffectClass.CallStatic<AndroidJavaObject>("createWaveform", timings, amplitudes, repeat);
        }
        /// <summary>
        /// Wrapper for public static VibrationEffect createWaveform (long[] timings, int repeat). API >= 26
        /// </summary>
        private static AndroidJavaObject createEffect_Waveform (long[] timings, int repeat)
        {
            return vibrationEffectClass.CallStatic<AndroidJavaObject>("createWaveform", timings, repeat);
        }
        #endregion
        #endregion

        #region Internal
        private static void logAuto (string text, logLevel level)
        {
            if (level == logLevel.Disabled) level = logLevel.Info;

            if (text != null) {
                if (level == logLevel.Warning && LogLevel == logLevel.Warning) {
                    Debug.LogWarning(text);
                }
                else if (level == logLevel.Info && LogLevel >= logLevel.Info) {
                    Debug.Log(text);
                }
            }
        }
        private static string arrToStr (long[] array) => array == null ? "null" : string.Join(", ", array);
        private static string arrToStr (int[] array) => array == null ? "null" : string.Join(", ", array);

        private static void clampAmplitudesArray (int[] amplitudes)
        {
            for (int i = 0; i < amplitudes.Length; i++) {
                amplitudes[i] = Mathf.Clamp(amplitudes[i], 1, 255);
            }
        }
        #endregion

        public static class PredefinedEffect
        {
            public static int EFFECT_CLICK;         // public static final int EFFECT_CLICK
            public static int EFFECT_DOUBLE_CLICK;  // public static final int EFFECT_DOUBLE_CLICK
            public static int EFFECT_HEAVY_CLICK;   // public static final int EFFECT_HEAVY_CLICK
            public static int EFFECT_TICK;          // public static final int EFFECT_TICK
        }
        public enum logLevel
        {
            Disabled,
            Info,
            Warning,
        }
    }
}

and the log level is broken (i.e. if you set it to info it only logs info, not info and above). If you want and accept pull requests I will make both those changes.

@ant5033
How can I use it on api level 33?
Do I just put this code in the object, allow permission, and use it? I'm a beginner.

This only works for Android right?

I have been using this for a while in a few projects but one of them I have just built for IOS and realised it doesn't support IOS vibrations. I may have to look for an alternative solution for my IOS builds.

Hello.

I like your script. I've built some wrapping around it and made an Android app so any user can set up their custom vibration pattern, hear it and feel it on their device. Then they can copy serialized pattern to Unity project in specific ScriptableObject, so these patterns can be used later in applications.

I am planning to release both APK and package, containing your script and my wrapping here, on GitHub, for free. No ads, no revenue.

Are you positive on this idea?