android.util.Property#get ( )源码实例Demo

Float getActualPropertyValue(Property<T, Float> property) {
    Float lastTarget = getLastTargetValue(property.getName());
    if (lastTarget == null) {
        lastTarget = property.get(mAnimationTarget);
    }
    return lastTarget;
}
 

private void animatePropertyBy(Property<View, Float> property, float byValue) {
    if (hasView()) {
        float fromValue = property.get(mView.get());
        float toValue = fromValue + byValue;
        animatePropertyBetween(property, fromValue, toValue);
    }
}
 

@Override
@Nullable
public ObjectAnimator ofFloat(@Nullable View view, @NonNull Property<View, Float> property,
                              float startFraction, float endFraction) {
    float start = property.get(view) * startFraction;
    float end = property.get(view) * endFraction;
    if (start == end) {
        return null;
    }
    property.set(view, start);
    return ObjectAnimator.ofFloat(view, property, end);
}
 

@Override
@Nullable
public ObjectAnimator ofInt(@Nullable View view, @NonNull Property<View, Integer> property,
                            float startFraction, float endFraction) {
    int start = (int) (property.get(view) * startFraction);
    int end = (int) (property.get(view) * endFraction);
    if (start == end) {
        return null;
    }
    property.set(view, start);
    return ObjectAnimator.ofInt(view, property, end);
}
 

protected final AdditiveAnimation createAnimation(Property<V, Float> property, float targetValue) {
    AdditiveAnimation animation = new AdditiveAnimation<>(mCurrentTarget, property, property.get(mCurrentTarget), targetValue);
    animation.setCustomInterpolator(mCurrentCustomInterpolator);
    return animation;
}
 

protected final AdditiveAnimation createAnimation(Property<V, Float> property, float targetValue, TypeEvaluator<Float> evaluator) {
    AdditiveAnimation animation = new AdditiveAnimation<>(mCurrentTarget, property, property.get(mCurrentTarget), targetValue);
    animation.setCustomTypeEvaluator(evaluator);
    animation.setCustomInterpolator(mCurrentCustomInterpolator);
    return animation;
}
 

protected final AdditiveAnimation createAnimation(Property<V, Float> property, Path path, PathEvaluator.PathMode mode, PathEvaluator sharedEvaluator) {
    AdditiveAnimation animation = new AdditiveAnimation<>(mCurrentTarget, property, property.get(mCurrentTarget), path, mode, sharedEvaluator);
    animation.setCustomInterpolator(mCurrentCustomInterpolator);
    return animation;
}
 

private void animateProperty(Property<View, Float> property, float toValue) {
    if (hasView()) {
        float fromValue = property.get(mView.get());
        animatePropertyBetween(property, fromValue, toValue);
    }
}