The first few days of the project encountered the whole problem, run on the android2.2, OK, wood has problems. Got 4.4 on the test, no response in WebView.
It is believed that the apes have searched many of these solutions:
In fact, there is already this class in android4.2. We just need to change the build SDK in the properties to 4.2 of 17. If you don't have a 17 SDK on your computer, well, that's the problem. Solve yourself!
Seemingly no code, no convincing. Wow, symbolic addition of a piece of code (and then egg):
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Android 4.4 js Call WebView Activity method record