设置ImageView的图片，支持改变图片颜色 @param iv @param id @param color

dp 转成为 px(像素)

获取两个数平均值 @param x1 一个点的x @param x2 一个点的x

@return 判断是否有绘制内容在画布上

清除缓存的触摸点

保存

设置画笔颜色 @param color 颜色

Compute the amount to scroll in the Y direction in order to get a rectangle completely on the screen (or, if taller than the screen, at least the firs

{@inheritDoc} <p> This version also clamps the scrolling to the bounds of our child.

Like {@link View#scrollBy}, but scroll smoothly instead of immediately. @param dx the number of pixels to scroll by on the X axis @param dy the numbe

根据宽度缩放图片，高度等比例 @param bm 源图 @param newWidth 新宽度 @return 缩放后的bitmap

缓存绘制的Bitmap @param bitmap

创建触摸点信息

判断当前是否第一步 @return

判断当前是否最后一步 @return

Should a navigation bar appear at the bottom of the screen in the current device configuration? A navigation bar may appear on the right side of the s

测量View的高度

操作变更

Smooth scroll by a Y delta @param delta the number of pixels to scroll by on the Y axis

获取点信息

@return whether the descendant of this scroll view is within delta pixels of being on the screen.

@return whether the descendant of this scroll view is within delta pixels of being on the screen.

清除画布，记得清除点的集合

缩放图片至指定宽高 @param bm 源图 @param newWidth 新宽度 @param newHeight 新高度 @return 缩放后的bitmap

添加手写文字 @param srcBitmap 手写文字图片

Handle scrolling in response to an up or down arrow click. @param direction The direction corresponding to the arrow key that was pr

Handle scrolling in response to an up or down arrow click. @param direction The direction corresponding to the arrow key that was pr

计算新的宽度信息

修改图片颜色 @param inBitmap 源图 @param color 颜色 @return 修改颜色后的图片

逐行扫描 清除边界空白 @param blank 边距留多少个像素 @param color 背景色限定 @return 清除边界后的Bitmap

禁止软键盘弹出

Handles scrolling in response to a "home/end" shortcut press. This method will scroll the view to the top or bottom and give the focus to the topmost/

Handles scrolling in response to a "home/end" shortcut press. This method will scroll the view to the top or bottom and give the focus to the topmost/

Get the system bar configuration. @return The system bar configuration for the current device configuration.

获取画笔颜色

从sp文件中获取选中画笔大小level

获取画布默认高度 @return

获取画布默认宽度 @return

三阶曲线的控制点

初始化两个点， @param last 最后的点的信息 @param cur 当前点的信息,当前点的信息，当前点的是根据事件获得，同时这个当前点的宽度是经过计算的得出的

初始化标题栏

@return whether the descendant of this scroll view is scrolled off screen.

@return whether the descendant of this scroll view is scrolled off screen.

计算控件宽高

计算控件宽高

手指抬起来的事件

开始书写

图片大小调整适配画布宽高 @param bitmap 源图 @param width 新宽度 @param height 新高度

保存图像到本地 @param bmp 源图 @param quality 压缩质量 @param format 图片格式 @return 保存后的图片地址