I tried to make a simple application to let my phone vibrate

Question

import android.content.Context;
import android.os.Vibrator;
Context context;
Vibrator v = (Vibrator) context.getSystemService(Context.VIBRATE_SERVICE);

void setup(){}

void draw(){
  v.vibrate(1000);
  noLoop();
}

PS. I gave the permissions for vibrate through the settings

So what am I doing wrong ?

Answer 1

use this

 Vibrator v = (Vibrator) context.getSystemService(Context.VIBRATOR_SERVICE);

instead of this

Vibrator v = (Vibrator) context.getSystemService(Context.VIBRATE_SERVICE);

NOTE : Don't forgot to initialize your context

UPDATE

Vibrator.vibrate() is deprecated

use this

void draw(){

        if (Build.VERSION.SDK_INT >= 26) {
            v.vibrate(VibrationEffect.createOneShot(1000, VibrationEffect.DEFAULT_AMPLITUDE));
        } else {
            v.vibrate(1000);
        }
    } 

Sample code

import android.content.Context;
import android.os.Build;
import android.os.VibrationEffect;
import android.os.Vibrator;

public class Tester
{
    Context context;
    Vibrator vibrator;

    public Tester(Context context) {
        this.context = context;
        vibrator = (Vibrator) context.getSystemService(Context.VIBRATOR_SERVICE);
    }




    void setup(){}

    void draw(){

        if (Build.VERSION.SDK_INT >= 26) {
            vibrator.vibrate(VibrationEffect.createOneShot(150, VibrationEffect.DEFAULT_AMPLITUDE));
        } else {
            vibrator.vibrate(150);
        }
    }
}

call this method like this

Tester tester= new Tester(this);
tester.draw();