Smashing eBook #29 Designing for Android

By Smashing eBook Series

When you intend to layout for cellular, you have got to concentrate on the democratic state of affairs that offers form to this area of interest. Many builders are conscious of this: by utilizing the Android working procedure to create apps, they gather an enormous marketplace percentage. This book will advisor you thru the Android universe and assist you to create interface designs for Android cellular gadgets.

TABLE OF CONTENTS

- studying The Android Platform: development, trying out And dispensing Apps
- Designing For Android
- Designing For Android: guidance And Techniques
- Designing For Android Tablets
- Getting the easiest Out Of Eclipse For Android Development
- start constructing For Android With Eclipse
- start constructing For Android With Eclipse, Reloaded

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Eventually, we have to inform the teaSpinner that BrewClockActivity is listening for OnItemSelected occasions. upload the subsequent line to BrewClockActivity’s onCreate process: // src/com/example/brewclock/BrewClockActivity. java public void onCreate() { // … teaSpinner. setOnItemSelectedListener(this); } that are meant to do it! Run your program back, and take a look at picking out varied teas from the Spinner. every time you choose a tea, its brew time may be proven at the countdown clock. the remainder of our code already handles counting down from the present brew time, so now we have an absolutely operating brew timer, with a listing of preset teas. you could, in fact, return into the code and upload extra preset teas to the database to fit your tastes. yet what if we published BrewClock to the industry? each time an individual desired to upload a brand new tea to the database, we’d have to manually replace the database, and republish the applying; each person would have to replace, and everyone might have a similar record of teas. That sounds lovely rigid, and many paintings for us! it'd be far better if the person had a way so as to add their very own teas and personal tastes to the database. We’ll take on that subsequent… Introducing actions each one reveal on your software and its linked code is an job. whenever you cross from one display to a different, Android creates a brand new task. in fact, even if an software may possibly include any variety of screens/activities, Android treats them as separate entities. actions interact to shape a cohesive event simply because Android helps you to simply move facts among them. during this ultimate part, you’ll upload a brand new task (AddTeaActivity) for your program and check in it with the Android procedure. You’ll then move information from the unique BrewClockActivity to this new task. First, although, we have to provide the person how to swap to the hot task. We’ll do that utilizing an concepts menu. techniques MENUS strategies menus are the pop-up menus that seem whilst the person hits the “Menu” key on their machine. Android handles the construction and show of techniques menus immediately; you simply have to inform it what ideas to demonstrate and what to do whilst an choice is selected by way of the person. although, instead of hard-coding our labels into the menu itself, we’ll utilize Android string assets. String assets allow you to preserve the entire human-readable strings and labels to your program in a single dossier, calling them inside of your code. this implies there’s just one position on your code the place you want to swap strings sooner or later. within the undertaking explorer, navigate to “res/values” and you may see strings. xml dossier already exists. This was once created by means of Eclipse after we first created the venture, and it really is used to shop any strings of textual content that we wish to use in the course of the program. Open strings. xml through double clicking on it, and turn to the XML view by means of clicking the strings. xml tab alongside the ground of the window. upload the next line in the aspect:

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