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Android Essentials by Chris Haseman

By Chris Haseman

Android necessities is a no-frills, no-nonsense, code-centric run in the course of the guts of software improvement on Google's cellular OS. This booklet makes use of the improvement of a pattern program to paintings via themes, concentrating on giving builders the fundamental instruments and examples required to make attainable advertisement purposes paintings. protecting the whole lot of the Android catalog in lower than one hundred fifty pages is just very unlikely. as a substitute, this e-book specializes in simply 4 major subject matters: the appliance lifestyles cycle and OS integration, person interface, location-based prone, and networking.

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What’s in an SMS? Sadly, to date, Android’s documentation on receiving and filtering SMS messages is confusing at best. I suspect it’s not a feature that’s high on the list of things to tell developers about. Although I disagree with these priorities, it gives me a chance to fill the gap. Telephony; Buried in the Telephony library is the call getMessageFromIntent, which will return an array of SMS messages. All that’s left is pulling the payload out of the SMS messages in question. ” It must be a combination suitably unique so that it will not be triggered by accident.

The following is an example of how to get a pointer to the View object when your application starts up. loginbutton); } Here you’ve acquired a pointer to the login button by calling findViewById. This allows you to add a click listener so that you’ll be notified when the button is selected (on a touch screen with a stylus) or selected by the center softkey. info { public void onClick(View v) { grabEnteredText(); } }; ... } The previous inline definition, when notified that a selection has occurred, calls the grabEnteredText method.

Someone added this, and they shouldn't have. You do not have direct access to files inside of a content provider. Don't touch this. ” It’s good to know that even the technical writers for Android’s documentation have a sense of humor. Fetching the User’s Bookmarks It should be obvious, at least at this point, that a developer could do some fairly nefarious things with access to a user’s bookmarks. It’s not clear, at this point, what Android will do to keep this sort of thing from happening. I suppose it’s up to the carriers to lock down or monitor this behavior.

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