By Zigurd Mednieks, Laird Dornin, G. Blake Meike, Masumi Nakamura
Delve into sensors, local improvement, 3D images, and plenty of different themes, and observe the best way to construct apps at the platform of your selection. in case you are an intermediate to complicated programmer, you will find out how to make nice Android apps.
- Learn tips on how to use the Android SDK with the Eclipse IDE
- Apply complicated Java techniques despite your adventure with the language
- Create an Android consumer interface that is appealing and straightforward to navigate
- Use the Fragment API for pill consumer interfaces
- Make your program suitable with Honeycomb and previous versions
- Understand Android's designated database layout matters and the position of SQLite
- Use sensors and gestures to extend your app's enter past simply tapping and scrolling
- Explore Android APIs for multimedia, position, verbal exchange, NFC, and different functions
Read Online or Download Programming Android PDF
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Extra info for Programming Android
Implementations frequently make the shared drop an ordered job queue. a number of threads may perhaps contend for the lock, yet each one holds it merely lengthy sufficient to enqueue a role. a number of employee threads grab the queue to take away projects for execution. it is a trend that's often referred to as the producer/consumer version. so long as a unit of labor can continue fullyyt within the context of the employee thread that says it, there's no desire for extra synchronization. should you investigate the implementation of AsyncTask you'll find that this can be precisely the way it works. Thread confinement is so helpful that Android has baked it into its framework within the type referred to as Looper. while initialized as a Looper, a Java thread becomes a role queue. It spends its whole existence elimination issues from an area queue and executing them. different threads enqueue paintings, as defined previous, for the initialized thread to approach. so long as the enqueuing thread deletes all references to the article it enqueues, either threads will be coded with no extra challenge for concurrency. as well as making it Concurrency in Android | a hundred and fifty five dramatically more uncomplicated to make courses which are right, this additionally eliminates any inefficiency that may be brought on by vast synchronization. possibly this description of a job queue brings to brain a build to which we alluded past during this bankruptcy? Android’s single-threaded, event-driven UI is, easily, a Looper. while it launches a Context the procedure does a few bookkeeping after which initializes the release thread as a Looper. That thread turns into the most thread for a provider and the UI thread for an task. In an task, the UI framework preserves a connection with this thread, and its job queue turns into the UI occasion queue: all of the exterior drivers, the monitor, the keyboard, the decision handler, and so forth, enqueue activities in this queue. the opposite 1/2 Looper is Handler. A Handler, created on a Looper thread, offers a portal to the Looper queue. whilst a Looper thread needs to permit another enqueued thread entry to its activity queue, it creates a brand new Handler and passes it to the opposite thread. There are numerous shortcuts that provide help to use a Handler: View. post(Runnable), View. postDelayed(Runnable, long), and task. runOnUiThread(Runnable). there's yet one more handy and strong paradigm within the Android toolkit for interprocess conversation and paintings sharing: the ContentProvider, which we’ll talk about in bankruptcy 12. think about even if a content material supplier can suit you sooner than you construct your individual structure at the low-level parts mentioned during this part. content material services are versatile and extensible, and deal with concurrent processing in a manner that's quickly sufficient for all however the so much time-sensitive purposes. Serialization Serialization is changing facts from a quick, effective, inner illustration to anything that may be saved in a power shop or transmitted over a community. changing facts to its serialized shape is usually referred to as marshaling it. changing it again to its stay, inmemory illustration is termed deserializing or unmarshaling.