Android JavaScript Bridge - Trigger Events

Question

Probably a simple question, I can call a native function from the JavaScript, for example:

Android.setVolume(0.7)

However, I do not know how to trigger (from Android/Java), or handle events (JS) that are not caused by user interaction, for example, alerting the JS when the user's network state changes, the battery gets below a certain point etc.

Any help greatly appreciated.

Actually, just found this answer here, stackoverflow.com/questions/7544671/…. The answer is over a year old and is labelled as a hack, is this still the best way to do it? — SteveEdson
– SteveEdson, Commented Apr 25, 2013 at 14:18

CommonsWare · Accepted Answer · 2013-04-25 14:21:05Z

1

However, I do not know how to trigger (from Android/Java), or handle events (JS) that are not caused by user interaction, for example, alerting the JS when the user's network state changes, the battery gets below a certain point etc.

As with the answer you linked to, use loadUrl() with a javascript: URL, akin to how a bookmarklet works.

The answer is over a year old and is labelled as a hack, is this still the best way to do it?

I am not completely clear why the author of that answer described it as a hack. Certainly, it's viable and is used a fair bit.

answered Apr 25, 2013 at 14:21

CommonsWare

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