Interpolator is used to modify the animation effect, define the rate of change of the animation, can make the existing animation effect accelerated (acceleration), decelerated (deceleration), repeated (repetition), bounced (bounce) and so on.
The contents of the document in Android are as follows:
Acceleratedecelerateinterpolator rate changes at the beginning and end of the animation are slower, accelerating in the middle
Accelerateinterpolator at the beginning of the animation the rate change is slow, and then start to accelerate
Anticipateinterpolator starts back and then moves forward.
Anticipateovershootinterpolator starts back and then dumps a certain value and returns the last value.
Bounceinterpolator animation at the end of the play
Cycleinterpolator Animation Loop plays a specific number of times, rate changes along the sine curve
Decelerateinterpolator in the beginning of the animation and then slowly
Linearinterpolator change at constant rate
Overshootinterpolator forward a certain value before returning to its original position.
If Android-defined interpolators does not match your effect, you can also customize Interpolators
Android Interpolator Meaning and usage