【Android Canvas】_<Android Canvas>全部问题与内容精选-阿里云

Android Canvas之Path操作

上一篇中介绍的Canvas绘制图形只能画一些常规图形（圆，椭圆，矩形等），如果想绘制更复杂的图形，Path神器来了！Path是什么？Path类将多种复合路径（多个轮廓，如直线段、二次曲线、立方曲线）封装在其内部的几何路径。如何绘制Path：通过设置Paint的Style（FILL、STROKE、FI...

Android自定义View工具：Paint&Canvas(二)

接上篇，Android自定义View工具：Paint&Canvas(一)，上篇主要介绍的是Paint，本篇接着来看Canvas。Canvas常用方法一览：Canvas常用方法备注绘制颜色 drawARGB通过设置ARGB值绘制颜色drawRGB通过设置RGB值绘制颜色drawColor绘制颜...

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Android自定义View工具：Paint&Canvas(一)

安卓的graphics提供了2D图形各种绘制工具，如Canvas(画布), color filters(颜色过滤器), points(点), rectangles(矩形)等，利用这些工具可以直接在界面上进行绘制。本文主要讲的是自定义View时我们经常用到的Canvas和Paint，像平时画画一样，我...

关于安卓canvas探索一（二维饼状图）

对于二维饼状图，自定义并不是很难，这里简单说一下要点：（1）传入的数据，需要标识占比多少。（2）传入的数据，需要携带各种参数，颜色等（3）绘制时，主要使用drawCircle和drawArc这两个方法进行绘制源码地址：链接：https://pan.baidu.com/s/1AZRNhtZ3TKtbM...

关于安卓canvas探索一（二维直方图）

源码地址：链接：https://pan.baidu.com/s/1AZRNhtZ3TKtbMnwWTVlnaQ 提取码：6ipb示例图片：实现思路：（1）绘制x，y轴的直线（2）绘制x，y所成面积的背景图（3）在指定面积内，绘制长方形块（直方图）主要使用canvas方法如下：canvas.drawR...

【Android 应用开发】Canvas 精准绘制文字 ( 文本边界坐标解析 | 绘图位置 )

文章目录一、文本边界坐标解析二、绘图位置一、文本边界坐标解析在上一篇博客【Android 应用开发】Canvas 精准绘制文字 ( 测量文本真实边界 | 将文本中心点与给定中心点对齐 ) 中 , 简要介绍了 Paint.getTextBounds() 函数获取的 Rect 边界 , 今天补充下精准...

【Android 应用开发】Canvas 精准绘制文字 ( 测量文本真实边界 | 将文本中心点与给定中心点对齐 )

文章目录一、测量文本真实边界二、将文本中心点与给定中心点对齐一、测量文本真实边界Paint.getTextBounds() 函数原型如下 :public class Paint { /** * 检索文本边界框并存储到边界。 * * 在边界内返回（由调用方分配）包含所有字符的最小矩形，其隐含原点为（0...

Android Canvas 方法总结

在自定义 View的时候，我们经常需要绘制一些自己想要的效果。这里就需要使用Canvas对象。下面将Canvas对象常用方法做个笔记，方便记忆。对Canvas进行操作对Canvas的一系列操作，是指对Canvas进行旋转、平移、缩放等操作。这些操作可以让Canvas对象使用起来更加便捷。Canvas...

【Android 应用开发】Canvas 绘制文字 ( 文字尺寸测量 | 基线绘制 )

文章目录I . 文字尺寸测量II . 基线绘制I . 文字尺寸测量1 . 精准绘制需求 : Canvas 绘制文字时 , 有时需要精准的控制文字的绘制 , 如绘制到指定的区域 , 居中 , 或者位于某个精准的坐标 ;2 . 精准测量 : 要实现精准绘制 , 必须对字符串绘制的区域有详细的测量 , 如...

Android 的Paint（画笔）及Canvas（画布）? 400 报错

Android 的Paint（画笔）及Canvas（画布）? 400 报错要绘图，首先得调整画笔，待画笔调整好之后，再将图像绘制到画布上，这样才可以显示在手机屏幕上。Android 中的画笔是 Paint类，Paint 中包含了很多方法对其属性进行设置，主要方法如下： s...

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