Add a callback interface for Watcher about uiautomator HOT 11 CLOSED

Yes, you are right. But technically it's hard to implement it if we still use Android uiautomator watcher mechanism. I am thinking if there is another way to implement similar functionality. Any idea is welcome!

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Actually what I am expecting is just a host side python callback which can do something, e.g take a screenShot when condition match. It needn't inject any code to device end UIWatcher, is it possible?

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uiautomator watcher is a java method on device side, which is triggered by a selection mismatch. We have to find a way to inform PC side and wait for its response. All these must be done before the java method returns. I am trying to find a way to resolve it, but I am not sure.

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An alternative way is to replace uiautomator watcher mechanism with pure python implementation on PC side, but it may cause some confusions.

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yes, that's what I mean. About your concern, I don't think it confuse someone. As it is just about add a pure python callback, not replace or break any original functionality.

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xiaocong, any update on this feature requirement?

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There are still some logic conflicts. I hope I can fix it soon.

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@jwang11 please help review the code under feature/not-found-callback branch. Any suggestion on how to define the API is welcome.

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@xiaocong, thanks. The code looks fine for me, however, we still a bit more time to verify its functionality. I assume the way to use it like
d.handlers.on(callback)
right?
and there is no change on uiautomator-jsonrpc-server

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@jwang11 yes, it's correct.

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@jwang11 and @xiaocong can you please give me an example on how to use callback interface for UIwatcher?

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