Adjust SimpleOnGestureListener.onFling() sensitivity

StackOverflow https://stackoverflow.com/questions/13997371

  •  11-12-2021
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Question

I have implemented SimpleOnGestureListener.onFling(), but I have to fling very fast to trigger it. Is there any way to make it more sensitive?

Thanks in advance...

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Solution

The sensitivity or "oomph" needed to trigger an onFling() event is checked here in GestureDetector:

if ((Math.abs(velocityY) > mMinimumFlingVelocity)
        || (Math.abs(velocityX) > mMinimumFlingVelocity)){
    handled = mListener.onFling(mCurrentDownEvent, ev, velocityX, velocityY);
}

Sadly there is no existing method to change the private member mMinimumFlingVelocity. However you should be able to copy the entire GestureDetector class into a new class in your project and hard code a new value yourself.

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