Android矩形-阿里云

Android 中使用Canvas绘制文字和矩形，将结果呈现在Bitmap上

一、activity_view1.xml<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app...

Android SurfaceView 绘图覆盖刷新及脏矩形刷新方法

SurfaceView在Android中用作游戏开发是最适宜的，本文就将演示游戏开发中常用的两种绘图刷新策略在SurfaceView中的实现方法。首先我们来看一下本例需要用到的两个素材图片： bj.jpg就是一个渐变图，用作背景。 question.png是一个半透明的图像，我们希望将它放在上面，...

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Android 上如何实现矩形区域截屏

对屏幕进行截屏并裁剪有两种方式：早截图和晚截图。早截图，就是先截取全屏，再让用户对截取到的图片进行修改;与之相对的，晚截图，就是先让用户在屏幕上划好区域，再进行截图和裁剪。其实两者并没有什么太大的区别，这篇就说说怎么实现晚截图。晚截图可以分成三步：在屏幕上标出截图的矩形区域调用系统接口截屏对...

Android Shape画圆，矩形

画圆环代码如下：   画圆环，外边的边界宽度大一点即可： <?xml version="1.0" encoding="utf-8"?> <shape xmlns:android="http://schemas.android.com/apk/res/android" an...

Android长方形图片生成正圆形，以及矩形图片生成圆角

一般要做正圆形图片，只能是正方形的基础上才能实现，否则就变成椭圆了，下面说说如何使长方形的图片生成正圆形图片废话不多说，没图没真相，先上图吧：原图：变成正圆后：下面上代码： public static Bitmap makeRoundCorner(Bitmap bitmap) { int w...

Android利用canvas画各种图形(点、直线、弧、圆、椭圆、文字、矩形、多边形、曲线、圆角矩形)

1、首先说一下canvas类： Class Overview The Canvas class holds the "draw" calls. To draw something, you need 4 basic components: A Bitmap to hold the pixels, a...

Android SurfaceView 绘图覆盖刷新及脏矩形刷新方法

Android SurfaceView 绘图覆盖刷新及“.NET研究”脏矩形刷新方法

　　SurfaceView在Android中用作游戏开发是最适宜的，本文就将演示游戏开发中常用的两种绘图刷新策略在SurfaceView中的实现方法。　　首先我们来看一下本例需要用到的两个素材图片：　　bj.jpg就是一个渐变图，用作背景。　　question.png是一个半透明的图像，我们希...

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