Android图形图像处理技术的相关内容

【Android开发】图形图像处理技术-实现Android动画的两种方式

在应用Android进行项目开发时，特别是在进行游戏开发时，经常需要涉及动画。Android中的动画通常可以分为逐帧动画(Frame Animation)和补间动画(Tween Animation)两种。下面将分别介绍这两种动画。一.实现逐帧动画(Frame Animation) 逐帧动画就是顺序...

【Android开发】图形图像处理技术-使用BitmapShader渲染图像

在Android中，提供的BitmapFactory类主要用来渲染图像。如果需要将一张图片裁剪成椭圆形或圆形等形状并显示到屏幕上，就可以使用BitmapShader类来实现。使用BitmapShader来渲染图像的基本步骤如下： 1.创建BitmapShader类的对象，可以通过一下构造方法进行创建...

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【Android开发】图形图像处理技术-旋转、缩放、倾斜和平移图像

一.旋转图像使用Android提供的android.graphics.Matrix类的setRotate()、postRotate()和preRotate()方法，可以对图像进行旋转。由于这三种方法处理方法名不同外，语法格式等均相同，下面将以setRotate()方法为例来进行介绍。setRot...

【Android开发】图形图像处理技术-绘制图片

在Android中，Canvas类不仅可以绘制几何图形、文件和路径，还可以用来绘制图片。想要使用Canvas类绘制图片，只需要使用Canvas类提供的如下表所示的方法将Bitmap对象中保存的图片绘制到画布上即可。drawBitmap(Bitmap bitmap,Rect src,RectF dst...

【Android开发】图形图像处理技术-Bitmap和BitmapFactory类

一、Bitmap类 Bitmap类代表位图，是Android系统中图像处理的一个重要类。使用该类，不仅可以获取图像文件信息，进行图像剪切、旋转、缩放等操作，而且还可以指定格式保存图像文件。对于这些操作，都可以通过Bitmap类提供的方法来实现。Bitmap类提供的常用方法如表所示：（1）public...

【Android开发】图形图像处理技术-常用绘图类之Canvas类

Canvans类代表画布，通过该类提供的方法，可以绘制各种图形(如矩形、圆形和线条等)。通常情况下，要在Android中绘图，需要先创建一个继承自View类的视图，并且在该类中重写onDraw(Canvas canvas)方法，然后在显示绘图的Activity中添加该视图。下面通过一个具体的实例来...

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