Android Internals Jonathan Levin Pdf 13
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However, in addition to the basic configuration of your Activity's service, you must register for the state change events that occur to that service and the state listener whose callback you registered. Of course, you will typically want to receive those callbacks in order to update your app's user interface--and thus, you will replace your original context with a new one taken from that activity, and keep the old one. See the example below.
// Register a callback to be invoked when the state of our service changes // so that we can access the old state // when the service is stopped private ServiceListener mServiceListener = new ServiceListener() { public void onServiceReturnedState() { switch (state) { case START: switch (state) { case STARTED: state = STARTING; // Now the service is starting, which means we have // to launch our new activity. // StartActivity will start our activity, // the main thread of which will run our onCreate // method. case STARTING: // On start of our second activity, we will call // setVisibility to GONE on the // our old activity.
First of all, I'd recommend to look at the great work of Jonathan Levin (a.k.a Technologeeks), namely his book on the Android internals that recently became free and could be accessed at the book's companion website: newandroidbook.com. From there you'll get links, description and usage examples to.
A fantastic ebook about Android development from the very beginning . It's where you'll get all the solutions to the questions you'll have during the course and in depth explanations for all the topics. For a newbie, it's a must read.
This book will have a happy end for me since I'm also going to publish an updated Android Architecture Blueprints book in the next few weeks. It will feature some code samples from the Android Internals book and the best of both worlds, since the content is covered by the official Google documentation. d2c66b5586