Vibration.cs

using UnityEngine;
using System.Collections;

public static class Vibration
{
#if UNITY_ANDROID && !UNITY_EDITOR
    public static AndroidJavaClass unityPlayer = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
    public static AndroidJavaObject currentActivity = unityPlayer.GetStatic<AndroidJavaObject>("currentActivity");
    public static AndroidJavaObject vibrator = currentActivity.Call<AndroidJavaObject>("getSystemService", "vibrator");
    public static AndroidJavaClass vibrationEffectClass = new AndroidJavaClass("android.os.VibrationEffect");
    public static int defaultAmplitude = vibrationEffectClass.GetStatic<int>("DEFAULT_AMPLITUDE");
    public static AndroidJavaClass androidVersion = new AndroidJavaClass("android.os.Build$VERSION");
    public static int apiLevel = androidVersion.GetStatic<int>("SDK_INT");
#else
    public static AndroidJavaClass unityPlayer;
    public static AndroidJavaObject vibrator;
    public static AndroidJavaObject currentActivity;
    public static AndroidJavaClass vibrationEffectClass;
    public static int defaultAmplitude;
#endif

    public static void Vibrate(long milliseconds)
    {
        CreateOneShot(milliseconds, defaultAmplitude);
    }

    public static void CreateOneShot(long milliseconds, int amplitude)
    {
        CreateVibrationEffect("createOneShot", new object[] { milliseconds, amplitude });
    }

    public static void CreateWaveform(long[] timings, int repeat)
    {
        CreateVibrationEffect("createWaveform", new object[] { timings, repeat });
    }

    public static void CreateWaveform(long[] timings, int[] amplitudes, int repeat)
    {
        CreateVibrationEffect("createWaveform", new object[] { timings, amplitudes, repeat });
    }

    public static void CreateVibrationEffect(string function, params object[] args)
    {
        if (isAndroid() && HasAmplituideControl())
        {
            AndroidJavaObject vibrationEffect = vibrationEffectClass.CallStatic<AndroidJavaObject>(function, args);
            vibrator.Call("vibrate", vibrationEffect);
        }
        else
            Handheld.Vibrate();
    }

    public static bool HasVibrator()
    {
        return vibrator.Call<bool>("hasVibrator");
    }

    public static bool HasAmplituideControl()
    {
        if (apiLevel >= 26) 
            return vibrator.Call<bool>("hasAmplitudeControl"); // API 26+ specific
        else 
            return false; // no amplitude control below API level 26
    }

    public static void Cancel()
    {
        if (isAndroid())
            vibrator.Call("cancel");
    }

    private static bool isAndroid()
    {
#if UNITY_ANDROID && !UNITY_EDITOR
	return true;
#else
        return false;
#endif
    }
}

Modified this Gist by @aVolpe to support VibrationEffect introduced in Android API level 26.

what is an example of the data passed in as timings?

I've tried this code but it doesn't work, even adding the permission on AndroidManifiest.xml.
This is the error: An exception was thrown by the type initializer for Vibration.

Vibration.Vibrate(1000);

I am using Unity2017.3.0f3.

Does it work with API levels < 26, too?

edit: Nope, crashes. Should I add try-catch (+ remember to fallback to "old" vibration, when catch was called?)

HasVibrator and HasAmplitude are both calls and not fields, so you have to access them with call instead of get, it took me a bit to find out that my if condition was the one crashing the app.

I adapted this solution together with the original @aVolpe version to make something that works with new AND old androids: https://gist.github.com/munkbusiness/9e0a7d41bb9c0eb229fd8f2313941564

Hi all! I've made a drastically improved version.

Script automatically detects Api Level. Checks if Amplitude control (API >= 26) is available. Also supports Predefined Effects (API >= 29).
If API is < 26, legacy functions are used (old api).

Code is available here: github gist link