FloatingActionButton.java 文件源码

@SuppressLint("NewApi")
private void init(Context context, AttributeSet attributeSet) {
    mVisible = true;
    mColorNormal = getColor(R.color.material_blue_500);
    mColorPressed = darkenColor(mColorNormal);
    mColorRipple = lightenColor(mColorNormal);
    mColorDisabled = getColor(android.R.color.darker_gray);
    mType = TYPE_NORMAL;
    mShadow = true;
    mScrollThreshold = getResources().getDimensionPixelOffset(
            R.dimen.fab_scroll_threshold);
    mShadowSize = getDimension(R.dimen.fab_shadow_size);
    if (hasLollipopApi()) {
        StateListAnimator stateListAnimator = AnimatorInflater
                .loadStateListAnimator(context, R.anim.fab_press_elevation);
        setStateListAnimator(stateListAnimator);
    }
    if (attributeSet != null) {
        initAttributes(context, attributeSet);
    }
    updateBackground();
}