Android with Material Design .在GitHub上看到的开源库，自己下载下来研究了一下，效果图：
好东西要分享，，GitHub下载地址： Android Floating Action Button先看一下Floating Action Button类的主要逻辑: void init(Context context, AttributeSet attributeSet) {TypedArray attr = context.obtainStyledAttributes(attributeSet, R.styleable.FloatingActionButton, 0, 0);mColorNormal = attr.getColor(R.styleable.FloatingActionButton_fab_colorNormal, getColor(android.R.color.holo_blue_dark));mColorPressed = attr.getColor(R.styleable.FloatingActionButton_fab_colorPressed, getColor(android.R.color.holo_blue_light));mColorDisabled = attr.getColor(R.styleable.FloatingActionButton_fab_colorDisabled, getColor(android.R.color.darker_gray));mSize = attr.getInt(R.styleable.FloatingActionButton_fab_size, SIZE_NORMAL);mIcon = attr.getResourceId(R.styleable.FloatingActionButton_fab_icon, 0);mTitle = attr.getString(R.styleable.FloatingActionButton_fab_title);mStrokeVisible = attr.getBoolean(R.styleable.FloatingActionButton_fab_stroke_visible, true);attr.recycle();updateCircleSize();mShadowRadius = getDimension(R.dimen.fab_shadow_radius);mShadowOffset = getDimension(R.dimen.fab_shadow_offset);updateDrawableSize();updateBackground();}主要类方法：private void updateDrawableSize() {mDrawableSize = (int) (mCircleSize + 2 * mShadowRadius);}private void updateCircleSize() {mCircleSize = getDimension(mSize == SIZE_NORMAL ? R.dimen.fab_size_normal : R.dimen.fab_size_mini);}public void setSize(@FAB_SIZE int size) {if (size != SIZE_MINI && size != SIZE_NORMAL) {throw new IllegalArgumentException(“Use @FAB_SIZE constants only!”);}if (mSize != size) {mSize = size;updateCircleSize();updateDrawableSize();updateBackground();}}@FAB_SIZEpublic int getSize() {return mSize;}public void setIcon(@DrawableRes int icon) {if (mIcon != icon) {mIcon = icon;mIconDrawable = null;updateBackground();}}public void setIconDrawable(@NonNull Drawable iconDrawable) {if (mIconDrawable != iconDrawable) {mIcon = 0;mIconDrawable = iconDrawable;updateBackground();}}/*** @return the current Color for normal state.*/public int getColorNormal() {return mColorNormal;}
我在这些地方： CSDN GitHub 微博
我想一个人旅行，背上简单的行囊，踏上行程，
