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Apache License
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package net.simonvt.menudrawer; /*from ww w . j a va2s.com*/ import android.view.animation.Interpolator; class PeekInterpolator implements Interpolator { private static final String TAG = "PeekInterpolator"; private static final SinusoidalInterpolator SINUSOIDAL_INTERPOLATOR = new SinusoidalInterpolator(); @Override public float getInterpolation(float input) { float result; if (input < 1.f / 3.f) { result = SINUSOIDAL_INTERPOLATOR.getInterpolation(input * 3); } else if (input > 2.f / 3.f) { final float val = ((input + 1.f / 3.f) - 1.f) * 3.f; result = 1.f - SINUSOIDAL_INTERPOLATOR.getInterpolation(val); } else { result = 1.f; } return result; } }