Shenkar
Amir Uval

• Android Developers YouTube Channel
• DevBites short videos
• Markdown The syntax used for this README.md file

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Install Android SDK's

Recommended Plugins:

• .ignore
• Markdown Support (JetBrain)
• Grep Console

Useful Android Studio shortcuts: (And More Shortcuts)

Tips:

• Use middle button of the mouse to select across rows, and edit all.

Homework: Create a project in Android studio and upload it to your GitHub account.

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Useful git commands:

• git status
• git log
• git show: Show various types of objects
• git tag: tag specific points in history as being important
  • for example, these commits were tagged with annotation and comment:
    • git tag -a 2 -m "lecture #2"
    • git tag -a 2.1 -m "lecture #2.1"
  • you can now jump between them using:
    • git checkout 2 (..or 2.1)
  • you can see the diff between 2 tags (or between branches) by adding /compare to the end of the github workspace URL.
• git add .
  • adds all un-staged files to your local git index

Slides

####class exercise

• Make main menu for exercises
  • Refactoring: rename MainActivity and related layout to Lesson2Activity and lesson2_layout
  • Create a new MainActivity to serve as a high level menu for exercises
  • Mark the new activity as MAIN in the manifest

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• Adding action bar
• Adding settings
  • Simply create a new "Settings Activity" from the new > activity command menu.
• Enabling "< Back" from settings
  • By overriding onOptionsItemSelected()
• Showing how to read values from SharedPreferences
  • And using AsyncHandler and UiHandler on the way
• Showing how to write values to SharedPreferences from code
• Added SQL implementation and example

adb -s emulator-5554 shell 'cat /data/data/org.shenkar.auval.codesamples/shared_prefs/org.shenkar.auval.codesamples_preferences.xml'

• clone this workspace to your local pc

  • file -> new -> Project from version control -> GitHub
  • paste https://github.com/auval/AndroidWorkshop.git
  • define local directory for the workspace
  • clone

• creating App Toolbar activity

  • Follow the tutorial
    • It's missing some important steps, so read here as well.
  • create an svg resource icon
    • New > “Vector Asset” from the context menu
  • define some menu options
    • New > “Android resource directory” from the context menu
    • Change the “Resource type” drop-down to be “menu”, then click OK to create the directory
    • right-click over your new res/menu/ directory and choose New > “Menu resource file” from the context menu
    • name it "lesson3.xml"
    • add <item> resources, like the example in the tutorial or your own.
  • Add onCreateOptionsMenu(Menu menu) {} to the activity, to inflate menu items

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• Settings walkthrough Every student implements on his/her pc during class.

  • the resulting project - use this as a reference!

• Scene transition

  • example: SceneTransitionActivity
  • diff

RecyclerView, Scene Transitions, Low Level Graphics

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• RecycleView (few words only + reference to code)

  • Official Training
  • Replacing ListView with RecycleView Diff

• Low level graphics and animation

• A lesson on Resources by Chaim Michael (with his permission)

 Custom View Animation

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Lots of examples:

1. Animated view (rotating dot): MyAnimatedGraphicsView
   • This view draws directly on the screen buffer, which clears every frame.
   • 
2. Animated view (rotating dot on offscreen Bitmap): MyBitmapAnimatedGraphicsView
   • This view draws on an offscreen Bitmap I created, so on each draw I add just one dot, and the bitmaps keeps all the past drawings.
   • It calculates dot position as a function of time, so the movement is independent neither of the speed of the phone nor hiccups of the UI thread.
   • 
3. SpriteAnimationActivity just puts a custom ViewGroup on the screen.
   • Notice that instead of ConstraintsLayout as root in the xml I use SpriteAnimationView. custom ViewGroup.
   • The animation happens in SpriteAnimationView
   • 
4. SvgViewsActivity demonstrates using SVG as a background image, and 4 svgs as frames for animation-list drawable.
   • The drawable is set as src of ImageView, and started from the Activity.
   • When touching a butterfly, it will fly elsewhere, using Scene Transition. This may be a useful reference for building your own game.
   • Notice that this activity has fixed orientation set in AndroidManifest.xml.
   • 
5. BmpAndSvgActivity is not animated. It demonstrates combining simple Bitmap as a background and an SVG as a srcCompat drawable of a view.
   • Notice how the svg doesn't lose quality when scaled up or down.
   • On the upper right corner there's a cool (but complex) hack: I took the SVG parsing code from the support library, and here I demonstrate how I turned a raw SVG to a Path object that Canvas can draw directly.
   • 

Note regarding working on the project: You should learn this method on how to collaborate using GitHub. Both students must contribute.

 Sound & Music

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- Help with projects

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- Testing
- Firebase Analytics
- Building APK for production

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testing from command line: gradlew test

####Download Project apk

####All the lessons slides

• Lesson #1: https://goo.gl/j8laap
• Lesson #2: https://goo.gl/4EHTQi
• Lesson #3: https://goo.gl/P2hWLP
• Lesson #4: https://goo.gl/CXtCcy
• Lesson #5: https://goo.gl/gVRMt2
  • Homework Review Settings of activity transition
• Lesson #6: https://goo.gl/hY7ALc
  • Homework Review Low level graphics: Stretched Hello
• Lesson #7: https://goo.gl/adGjJf
• Lesson #8: https://goo.gl/d8mepK
• Lesson #9: https://goo.gl/ekn88F
• Lesson #10: https://goo.gl/W8wHJx

project specifications