linglongxin24/AndroidNote
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Canvas

Browse Source
This commit is contained in:
sloop
2016-01-30 21:36:37 +08:00
parent cccc929c7c
commit 7ebd8b181c
1 changed files with 5 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
问题/Canvas/Canvas(3).md
View File

@@ -143,7 +143,7 @@ Picture虽然方法就那么几个，但是具体使用起来还是分很多情
mPicture.draw(canvas); mPicture.draw(canvas);
``` ```
![]() <img src="https://github.com/GcsSloop/AndroidNote/blob/master/%E9%97%AE%E9%A2%98/Canvas/Art3/drawPicture1.jpg" width = "270" height = "480"/>
**PS：这种方法在比较低版本的系统上绘制后可能会影响Canvas状态，所以这种方法一般不会使用。** **PS：这种方法在比较低版本的系统上绘制后可能会影响Canvas状态，所以这种方法一般不会使用。**
@@ -164,7 +164,7 @@ public void drawPicture (Picture picture, RectF dst)
canvas.drawPicture(mPicture,new RectF(0,0,mPicture.getWidth(),200)); canvas.drawPicture(mPicture,new RectF(0,0,mPicture.getWidth(),200));
``` ```
![]() <img src="https://github.com/GcsSloop/AndroidNote/blob/master/%E9%97%AE%E9%A2%98/Canvas/Art3/drawPicture2.jpg" width = "270" height = "480"/>
**PS:对照上一张图片，可以比较明显的看出，绘制的内容根据选区进行了缩放。 ** **PS:对照上一张图片，可以比较明显的看出，绘制的内容根据选区进行了缩放。 **
@@ -178,7 +178,9 @@ public void drawPicture (Picture picture, RectF dst)
drawable.draw(canvas); drawable.draw(canvas);
``` ```
**PS:此处setBounds相当于剪裁显示区域，而不会根据该区域进行缩放。** <img src="https://github.com/GcsSloop/AndroidNote/blob/master/%E9%97%AE%E9%A2%98/Canvas/Art3/drawPicture3.jpg" width = "270" height = "480"/>
**PS:此处setBounds相当于剪裁显示区域，并非根据该区域进行缩放。**
### (2)drawBitmap ### (2)drawBitmap
如果你了解过矢量图和位图，你就会发现，其实上面讲的Picture和矢量图非常类似，而Bitmap就是位图，两者区别如下： 如果你了解过矢量图和位图，你就会发现，其实上面讲的Picture和矢量图非常类似，而Bitmap就是位图，两者区别如下：