问题
Now that Android 4.1.1 is out there on some phones I noticed that issues start to pop out using default browser and this OS.
In my case I have an application that uses web views (meaning default browser) and a lot of canvas.
I want by having this topic that everyone to post found issues and solutions if you know one.
I will start with:
Problem: duplicated canvas More info at: http://code.google.com/p/android/issues/detail?id=35474 Solution Canvas parent element should not have css property "overflow" with value "hidden"
Problem Canvas drawing looks pixelated More info: You can read: http://www.html5rocks.com/en/tutorials/canvas/hidpi/ and also test //html5rocks.com/en/tutorials/canvas/hidpi/demo/demo.html to see yourself (in my case I don't use images I build using canvas and my drawing looks pixelated) also some info can be found at //code.google.com/p/android/issues/detail?id=38470 Solution (searching for one)
Problem Canvas drawn disappears More info: I couldn't found other people encountering this and in my case it reproduces sometimes. Solution (searching for one)
PS: I cannot post link because of anti-spam
Update (3 Sep 2013): duplicate canvas issue now appears on Nexus 7 having Android 4.2.2 and/or 4.3 Also you may want to know that "duplicate canvas" issue happens only if you have "Force GPU rendering" enabled for your device.
来源：https://stackoverflow.com/questions/13071528/html5-canvas-issues-on-android-4-1-1