Android App Components by Vanderbilt University

This post is to record the trials and errors that I encounter when I
learn and review.

Key concepts in android are: Activity, Service, Broadcast Receiver,
Content Provider and Intent. You needn’t know all the details in order
to write android apps.

Week 1

Module 1

  • Android’s middleware infrastructure provides reusable
    capabilities that extend hardware-centric OS kernel and protocl
  • App components are essential building blocks of mobile apps that
    provide various hooks via which Android can effect an app’s
  • Intents Messages that describe an action to perform or an
    event that has occurred.
  • Activities Provide a screen within which users can interact in
    order to do something.
  • Broadcast Receivers Event handlers that respond to broadcast
  • Services Run in background to perform long-running operations
    or access remote resources.
  • Content Providers Manage access to structures data and
    provides data security mechanisms.
  • Java Threads. One way is to implement the Runnable interface. Or
    you can create an anonymous inner class. Or you can create one
    using a lambda expression.
  • An app registers callbacks for specific types of events that can
    occur within the framework.
  • Expose hardware and Linux OS kernel capabilities to apps.
  • Run continuously during system operation.
  • Control flow is driven by various events and callbacks.
  • The Activity Manager Service in android.

Module 2 Introduction to Git###

*git init status commit and etc.

  • But SmartGit is a much better tool for open source project programming.
  • Git remote. you can connect your repository to many remote
    repositories, ‘master ‘ is the default repo.
  • git push. This is how you backup your local changes to a remote
    server’s copy of your repository.
  • git clone, remote, fetch, pull, push.

Week 2

Module 3 Android Intents