====== Programming Mobile Applications for Android Handheld systems, Part 1 ======

Course page: https://class.coursera.org/androidpart2-001\\
By Dr. Adam Porter


Source code available at: https://github.com/aporter/coursera-androidc

===== Week 5 - Threads, AsyncTasks and Handlers, and Networking  =====

==== Threads, AsyncTasks and Handlers ====

<note todo>Provide notes on this course.</note>

==== Networking ====

  * Using HTTP get requests.
  * Processing HTTP responses, with JSON and XML.
  * Supoprt classes:
    * Socket (java.net)
      * using input/output streams
    * HttpRequest and HttpResponse (in org.apache)
    * Uri, AndroidHttpClient, AudioStream (in android.net)
    * HttpUrlConnection
      * using URL.openConnection()
    * AndroidHttpClient
      * create new instance with AndroidHttpClient.newInstance("")
      * create HttpGet(URL)
      * create ResponseHandler<String> (BasicResponseHandler for instance)
      * call client.execute(request, responseHandler);

  * JSON format
    * 2 types of structures:
      * maps
      * ordered lists
  * XML format
    * DOM (complete reading of the document object model)
    * SAX (stream reading with callbacks) parsers.
    * PULL similar to SAX but the reading of the next element is controlled by the application.
  


===== Week 6 - User Notifications, BroadcastReceiver and Alarms  =====

==== User Notifications ====

<note todo>Provide notes on this course.</note>

==== BroadcastReceiver class ====

  * BroadcastReceiver class
    * Wait for events, receive them and react to them
    * Broadcast receiver register for the type of events they are interested in.
    * Intent are broadcasted
    * onReceive() method called with received intent.
  * Registration
    * Static registration:
      * <receiver> tag with <intent-filter> inside.
      * attributes:
        * android:enabled=[true|false]
        * android:exported=[true|false]
        * android:icon
        * android:name
        * android:permission
    * Dynamic registration
      * create IntentFilter object
      * create BroadcastReceiver
      * register BroadcastReceiver using registerReceiver()
        * from LocalBroadcastManager
        * context
      * call unRegisterReceiver()

  * Broadcast
    * Normal or ordered.
    * sticky or non-sticky.
    * With or without receiver permission.
    * debug details with: Intent.setFlag(FLAG_DEBUG_LOG_RESOLUTION)
    * adb dumpsys to get more info on broadcast receiver.

  * Processing
    * Event delivery:
      * onReceive():
        * context
        * intent
    * BroadcastReceiver are only valid while in onReceive() method.
    * sendOrderedBroadcast()
      * IntentFilter.setPriority()
    * abortBroadcast() => to stop a broadcast.
    * sendStickyBroadcast()
    * sendStickyOrderedBroadcast()
    * apps need BROADCAST_STICKY permission to broadcast these.
    * use isInitialStickyBroadcast() to check for cached sticky broadcast.

==== Alarms ====

  * Alarms
    * mechanism to send intent at some point(s) in the future.
    * Can wake up a device.
    * Alarms are cancelled in case of shutdown.
  * AlarmManager
    * getSystemService(ALARM_SERVICE)
    * set(type, triggerAtTime, PendingIntent);
    * setRepeating(type, triggerAtTime, interval, pendingIntent)
    * setInexactRepeating(...)

  * Alarm types
    * How to interpret the time:
      * Realtime : number of millisecs since 1 Jan 1970
      * system up time.
    * Want to do when device sleeps:
      * wake the device: RTC_WAKEUP / ELAPSED_REALTIME_WAKEUP
      * wait for wake up: RTC / ELAPSED_REALTIME
  
  * PendingIntent:
    * create with:
      * getActivity(...)
      * getBroadcast(...)
      * getService(...) 

===== Week 7 - Graphics, Touch and Multimedia  =====

==== Graphics and animation ====

  * 2D graphics
    * ImageView
      * Simple, less flexible
    * Canvas
      * Complicated, more powerfull.
      * drawText(), drawPoints(), drawColor(), drawOval(), drawBitmap(), etc.
      * GenericView for less frequent drawning.
      * SurfaceView for frequent drawing.
        * Drawing on a surface.
        * Subclass must implement SurfaceHolder.Callback
        * surfaceCreated()
        * surfaceChanged()
        * surfaceDestroyed()
        * to Draw:
          * SurfaceHolder.lockCanvas()
          * Canvas.drawBitmap(), etc
          * SurfaceHolder.unlockCanvasAndPost()

    * Drawable class:
      * ShapeDrawable
        * PathShape
        * RectShape
        * OvalShape
      * BitmapDrawable
      * ColorDrawable

  * View animation
    * size, position, transparency, etc...
    * TransitionDrawable
      * 2-layers drawable
    * AnimationDrawable
      * Show each frame for some time.
    * Animation
      * transformation of content of a view.

  * Property animation
    * ValueAnimator
      * Contains a TimeInterpolator
      * AnimatorUpdateListener
      * TypeEvaluator
      * AnimatorSet
      * ViewPropertyAnimator

==== Touch and Gestures ====

  * MotionEvents
    * Action code
      * ACTION_DOWN
      * ACTION_POINTER_DOWN
      * ACTION_POINTER_UP
      * ACTION_MOVE
      * ACTION_UP
      * ACTION_CANCEL
      * getActionMasked()
      * getActionIndex()
      * getPointerId(index)
      * getPointerCount()
      * getX(pindex)
      * getY(pindex)
      * findPointerIndex(pid)
    * time of event
    * device
    * location
    * pressure
    * MultiTouch:
      * Pointers with an unique ID

  * Touch Handling
    * View.onTouchEvent()
    * View.OnTouchListener

  * Gestures
    * GestureDetector
    * GestureDetector.OnGestureListener
    * GestureOverlayView
    * GestureLibraries.fromRawResource(...)

==== Multimedia ====

  * Audio, Images, Movies
    * AudioManager, SoundPool
      * getSystemService(Context.AUDIO_SERVICE)
      * Load and play sound effects
      * manage volume
      * SoundPool can mix streams
    * RingtoneManager, Ringtone
    * MediaPlayer
      * Playback of audio and video streams and files.
      * setDataSource()
      * prepare()
      * start()/pause()
      * seekTo()
      * stop()
      * release()
    * VideoView
    * MediaRecorder
      * setAudioSource()
      * setVideoSource()
      * setOutputFormat()
      * prepare()
      * start()
      * stop()
      * release()
  * Use camera
    * need uses-permission
    * need uses-feature for camera
    * get camera instance
    * set camera parameters
    * setup preview display
    * start preview
    * take a picture and process image data
    * release camera