PopupCircleView.java 文件源码

private void init() {
    mLayoutParams = new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
    mDecorView = (ViewGroup) mContext.getWindow().getDecorView();

    mPopup = new PopupLayer(mContext, mRadius);
    mPopup.setVisibility(INVISIBLE);
    mAlphAnimator = new ValueAnimator();
    mAlphAnimator.setFloatValues(0.0f, 1.0f);
    mAlphAnimator.setDuration(mAnimDuration);
    mAlphAnimator.setInterpolator(new LinearOutSlowInInterpolator());
    mAlphAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
        @Override
        public void onAnimationUpdate(ValueAnimator animation) {
            mPopup.setShadowViewAlpha(Float.valueOf(animation.getAnimatedValue() + ""));
        }
    });

    addOnLayoutChangeListener(new OnLayoutChangeListener() {
        @Override
        public void onLayoutChange(View v, int left, int top, int right, int bottom, int oldLeft, int oldTop, int oldRight, int oldBottom) {
            initButtons();
            if (onButtonPreparedListener != null)
                onButtonPreparedListener.onPrepared(mButtons);
        }
    });

}