CODEWITHSUNDEEP
androidvibration
Ton
Ton

Reputation: 9776

Vibrator intensity is too soft

I use "vibrator.vibrate(2000);" for vibration and it vibrates, but the intensity is very soft. I know that my phone is able to vibrate much stronger because when receiving a call or notification it vibrates correctly. Why is the function vibrate() so week? Thanks

Vibrator vibrator = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);
vibrator.vibrate(4000);

The phone vibrates really strong when receiving a text or a notification, though

Upvotes: 0

Views: 2180

Answers (4)

LaDude
LaDude

Reputation: 1403

On my phone (Samsung Galaxy S3 with Android 4.3) the intensity of the vibrator is triggered by the system wide setting found in menu item

phone settings > My device > Sound > Vibration intensity

Here, you can adjust the vibration intensity for Incoming call, Notification and Haptic feedback. The setting of Notification influences the intensity of the vibration you cause with your implementation. Setting that value to zero leads to the effect that your phone does not vibrate at all with your code.

Upvotes: 0

paulkayuk
paulkayuk

Reputation: 1052

In most phones, the vibration is caused (quite crudely) by a minature vibration motor which has an offset weight on the shaft. Such that, when the motor is activated and the shaft spins, the offset weight causes the motor, and whatever it is attached to, to vibrate. There is no control other than the duration for which power is applied to the motor.

Typical Miniature Vibration Motor

Though this wouldn't seem to explain why call receipt or notification manages to produce a stronger vibration than the one you get yourself through the API function. So perhaps I should have made this a comment rather than an answer? (But I couldn't see how to get the picture in a comment)

Upvotes: 2

stinepike
stinepike

Reputation: 54702

You can not increase further vibration intensity. So to get better feel you can use public void vibrate(long[] pattern, int repeat) instead of vibrator.vibrate(2000);

here the patter is (from the api reference)

Pass in an array of ints that are the durations for which to turn on or off the vibrator in milliseconds. The first value indicates the number of milliseconds to wait before turning the vibrator on. The next value indicates the number of milliseconds for which to keep the vibrator on before turning it off. Subsequent values alternate between durations in milliseconds to turn the vibrator off or to turn the vibrator on.

so you can try different patterns to get a better feel. for example 

final long[] pattern = { 0, 200, 500, 500, 200 };
vibrator.vibrate(pattern , 0);

you can create your own pattern to check.

Upvotes: 2

StereoRocker
StereoRocker

Reputation: 61

This is an educated guess as I've never used the vibrator, but perhaps try increasing the value you're passing to the function?

Upvotes: 0

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