Android Notes For Professionals.pdf

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Android
Android
Notes for Professionals
™
Notes for Professionals
of professional hints and tricks
1000+ pages
GoalKicker.com
Free Programming Books
Disclaimer
This is an unocial free book created for educational purposes and is
not aliated with ocial Android
™
group(s) or company(s).
All trademarks and registered trademarks are
the property of their respective owners
Contents
About
................................................................................................................................................................................... 1
Chapter 1: Getting started with Android
........................................................................................................... 2
Section 1.1: Creating a New Project
.............................................................................................................................. 2
Section 1.2: Setting up Android Studio
....................................................................................................................... 13
Section 1.3: Android programming without an IDE
.................................................................................................. 14
Section 1.4: Application Fundamentals
...................................................................................................................... 18
Section 1.5: Setting up an AVD (Android Virtual Device)
......................................................................................... 19
Chapter 2: Android Studio
...................................................................................................................................... 23
Section 2.1: Setup Android Studio
.............................................................................................................................. 23
Section 2.2: View And Add Shortcuts in Android Studio
.......................................................................................... 23
Section 2.3: Android Studio useful shortcuts
............................................................................................................ 24
Section 2.4: Android Studio Improve performance tip
............................................................................................ 25
Section 2.5: Gradle build project takes forever
........................................................................................................ 26
Section 2.6: Enable/Disable blank line copy
............................................................................................................ 26
Section 2.7: Custom colors of logcat message based on message importance
................................................. 27
Section 2.8: Filter logs from UI
................................................................................................................................... 28
Section 2.9: Create filters configuration
................................................................................................................... 29
Section 2.10: Create assets folder
.............................................................................................................................. 30
Chapter 3: Instant Run in Android Studio
....................................................................................................... 32
Section 3.1: Enabling or disabling Instant Run
.......................................................................................................... 32
Section 3.2: Types of code Swaps in Instant Run
.................................................................................................... 32
Section 3.3: Unsupported code changes when using Instant Run
......................................................................... 33
Chapter 4: TextView
................................................................................................................................................. 34
Section 4.1: Spannable TextView
................................................................................................................................ 34
Section 4.2: Strikethrough TextView
.......................................................................................................................... 35
Section 4.3: TextView with image
.............................................................................................................................. 36
Section 4.4: Make RelativeSizeSpan align to top
..................................................................................................... 36
Section 4.5: Pinchzoom on TextView
......................................................................................................................... 38
Section 4.6: Textview with dierent Textsize
............................................................................................................ 39
Section 4.7: Theme and Style customization
............................................................................................................ 39
Section 4.8: TextView customization
......................................................................................................................... 41
Section 4.9: Single TextView with two dierent colors
............................................................................................ 44
Chapter 5: AutoCompleteTextView
................................................................................................................... 46
Section 5.1: AutoComplete with CustomAdapter, ClickListener and Filter
............................................................. 46
Section 5.2: Simple, hard-coded AutoCompleteTextView
....................................................................................... 49
Chapter 6: Autosizing TextViews
......................................................................................................................... 50
Section 6.1: Granularity
............................................................................................................................................... 50
Section 6.2: Preset Sizes
............................................................................................................................................. 50
Chapter 7: ListView
.................................................................................................................................................... 52
Section 7.1: Custom ArrayAdapter
............................................................................................................................. 52
Section 7.2: A basic ListView with an ArrayAdapter
................................................................................................ 53
Section 7.3: Filtering with CursorAdapter
.................................................................................................................. 53
Chapter 8: Layouts
.................................................................................................................................................... 55
Section 8.1: LayoutParams
......................................................................................................................................... 55
Section 8.2: Gravity and layout gravity
.................................................................................................................... 58
Section 8.3: CoordinatorLayout Scrolling Behavior
................................................................................................. 60
Section 8.4: Percent Layouts
...................................................................................................................................... 62
Section 8.5: View Weight
............................................................................................................................................ 63
Section 8.6: Creating LinearLayout programmatically
........................................................................................... 64
Section 8.7: LinearLayout
........................................................................................................................................... 65
Section 8.8: RelativeLayout
........................................................................................................................................ 66
Section 8.9: FrameLayout
.......................................................................................................................................... 68
Section 8.10: GridLayout
............................................................................................................................................. 69
Section 8.11: CoordinatorLayout
................................................................................................................................. 71
Chapter 9: ConstraintLayout
................................................................................................................................ 73
Section 9.1: Adding ConstraintLayout to your project
............................................................................................. 73
Section 9.2: Chains
...................................................................................................................................................... 74
Chapter 10: TextInputLayout
................................................................................................................................ 75
Section 10.1: Basic usage
............................................................................................................................................ 75
Section 10.2: Password Visibility Toggles
.................................................................................................................. 75
Section 10.3: Adding Character Counting
................................................................................................................. 75
Section 10.4: Handling Errors
..................................................................................................................................... 76
Section 10.5: Customizing the appearance of the TextInputLayout
...................................................................... 76
Section 10.6: TextInputEditText
.................................................................................................................................. 77
Chapter 11: CoordinatorLayout and Behaviors
........................................................................................... 79
Section 11.1: Creating a simple Behavior
................................................................................................................... 79
Section 11.2: Using the SwipeDismissBehavior
.......................................................................................................... 80
Section 11.3: Create dependencies between Views
.................................................................................................. 80
Chapter 12: TabLayout
............................................................................................................................................. 82
Section 12.1: Using a TabLayout without a ViewPager
............................................................................................ 82
Chapter 13: ViewPager
............................................................................................................................................. 83
Section 13.1: ViewPager with a dots indicator
........................................................................................................... 83
Section 13.2: Basic ViewPager usage with fragments
............................................................................................. 85
Section 13.3: ViewPager with PreferenceFragment
................................................................................................. 86
Section 13.4: Adding a ViewPager
.............................................................................................................................. 87
Section 13.5: Setup OnPageChangeListener
............................................................................................................. 88
Section 13.6: ViewPager with TabLayout
.................................................................................................................. 89
Chapter 14: CardView
............................................................................................................................................... 92
Section 14.1: Getting Started with CardView
............................................................................................................. 92
Section 14.2: Adding Ripple animation
...................................................................................................................... 93
Section 14.3: Customizing the CardView
................................................................................................................... 93
Section 14.4: Using Images as Background in CardView (Pre-Lollipop device issues)
........................................ 94
Section 14.5: Animate CardView background color with TransitionDrawable
...................................................... 96
Chapter 15: NavigationView
.................................................................................................................................. 97
Section 15.1: How to add the NavigationView
........................................................................................................... 97
Section 15.2: Add underline in menu elements
....................................................................................................... 101
Section 15.3: Add seperators to menu
..................................................................................................................... 102
Section 15.4: Add menu Divider using default DividerItemDecoration
................................................................ 103
Chapter 16: RecyclerView
..................................................................................................................................... 105
Section 16.1: Adding a RecyclerView
........................................................................................................................ 105
Section 16.2: Smoother loading of items
................................................................................................................. 106
Section 16.3: RecyclerView with DataBinding
......................................................................................................... 107
Section 16.4: Animate data change
......................................................................................................................... 108
Section 16.5: Popup menu with recyclerView
......................................................................................................... 112
Section 16.6: Using several ViewHolders with ItemViewType
............................................................................... 114
Section 16.7: Filter items inside RecyclerView with a SearchView
........................................................................ 115
Section 16.8: Drag&Drop and Swipe with RecyclerView
....................................................................................... 116
Section 16.9: Show default view till items load or when data is not available
.................................................... 117
Section 16.10: Add header/footer to a RecyclerView
............................................................................................ 119
Section 16.11: Endless Scrolling in Recycleview
....................................................................................................... 122
Section 16.12: Add divider lines to RecyclerView items
.......................................................................................... 122
Chapter 17: RecyclerView Decorations
......................................................................................................... 125
Section 17.1: Add divider to RecyclerView
............................................................................................................... 125
Section 17.2: Drawing a Separator
.......................................................................................................................... 127
Section 17.3: How to add dividers using and DividerItemDecoration
.................................................................. 128
Section 17.4: Per-item margins with ItemDecoration
............................................................................................. 128
Section 17.5: ItemOsetDecoration for GridLayoutManager in RecycleView
.................................................... 129
Chapter 18: RecyclerView onClickListeners
................................................................................................. 131
Section 18.1: Kotlin and RxJava example
................................................................................................................ 131
Section 18.2: RecyclerView Click listener
................................................................................................................. 132
Section 18.3: Another way to implement Item Click Listener
................................................................................ 133
Section 18.4: New Example
....................................................................................................................................... 135
Section 18.5: Easy OnLongClick and OnClick Example
.......................................................................................... 136
Section 18.6: Item Click Listeners
............................................................................................................................. 139
Chapter 19: RecyclerView and LayoutManagers
..................................................................................... 141
Section 19.1: Adding header view to recyclerview with gridlayout manager
...................................................... 141
Section 19.2: GridLayoutManager with dynamic span count
............................................................................... 142
Section 19.3: Simple list with LinearLayoutManager
.............................................................................................. 144
Section 19.4: StaggeredGridLayoutManager
......................................................................................................... 148
Chapter 20: Pagination in RecyclerView
...................................................................................................... 151
Section 20.1: MainActivity.java
................................................................................................................................. 151
Chapter 21: ImageView
.......................................................................................................................................... 156
Section 21.1: Set tint
................................................................................................................................................... 156
Section 21.2: Set alpha
.............................................................................................................................................. 157
Section 21.3: Set Scale Type
..................................................................................................................................... 157
Section 21.4: ImageView ScaleType - Center
......................................................................................................... 162
Section 21.5: ImageView ScaleType - CenterCrop
................................................................................................. 164
Section 21.6: ImageView ScaleType - CenterInside
............................................................................................... 166
Section 21.7: ImageView ScaleType - FitStart and FitEnd
..................................................................................... 168
Section 21.8: ImageView ScaleType - FitCenter
..................................................................................................... 172
Section 21.9: Set Image Resource
............................................................................................................................ 174
Section 21.10: ImageView ScaleType - FitXy
........................................................................................................... 175
Section 21.11: MLRoundedImageView.java
.............................................................................................................. 177
Chapter 22: VideoView
........................................................................................................................................... 180
Section 22.1: Play video from URL with using VideoView
..................................................................................... 180
Section 22.2: VideoView Create
............................................................................................................................... 180
Chapter 23: Optimized VideoView
.................................................................................................................... 181
Section 23.1: Optimized VideoView in ListView
....................................................................................................... 181
Chapter 24: WebView
............................................................................................................................................. 193
Section 24.1: Troubleshooting WebView by printing console messages or by remote debugging
................. 193
Section 24.2: Communication from Javascript to Java (Android)
...................................................................... 194
Section 24.3: Communication from Java to Javascript
........................................................................................ 195
Section 24.4: Open dialer example
.......................................................................................................................... 195
Section 24.5: Open Local File / Create dynamic content in Webview
................................................................ 196
Section 24.6: JavaScript alert dialogs in WebView - How to make them work
................................................. 196
Chapter 25: SearchView
........................................................................................................................................ 198
Section 25.1: Setting Theme for SearchView
.......................................................................................................... 198
Section 25.2: SearchView in Toolbar with Fragment
............................................................................................. 198
Section 25.3: Appcompat SearchView with RxBindings watcher
......................................................................... 200
Chapter 26: BottomNavigationView
............................................................................................................... 203
Section 26.1: Basic implemetation
........................................................................................................................... 203
Section 26.2: Customization of BottomNavigationView
....................................................................................... 204
Section 26.3: Handling Enabled / Disabled states
................................................................................................. 204
Section 26.4: Allowing more than 3 menus
............................................................................................................ 205
Chapter 27: Canvas drawing using SurfaceView
..................................................................................... 207
Section 27.1: SurfaceView with drawing thread
..................................................................................................... 207
Chapter 28: Creating Custom Views
............................................................................................................... 212
Section 28.1: Creating Custom Views
...................................................................................................................... 212
Section 28.2: Adding attributes to views
................................................................................................................. 214
Section 28.3: CustomView performance tips
......................................................................................................... 216
Section 28.4: Creating a compound view
............................................................................................................... 217
Section 28.5: Compound view for SVG/VectorDrawable as drawableRight
...................................................... 220
Section 28.6: Responding to Touch Events
............................................................................................................ 223
Chapter 29: Getting Calculated View Dimensions
.................................................................................... 224
Section 29.1: Calculating initial View dimensions in an Activity
............................................................................ 224
Chapter 30: Adding a FuseView to an Android Project
......................................................................... 225
Section 30.1: hikr app, just another android.view.View
.......................................................................................... 225
Chapter 31: Supporting Screens With Dierent Resolutions, Sizes
................................................ 232
Section 31.1: Using configuration qualifiers
............................................................................................................. 232
Section 31.2: Converting dp and sp to pixels
.......................................................................................................... 232
Section 31.3: Text size and dierent android screen sizes
.................................................................................... 233
Chapter 32: ViewFlipper
........................................................................................................................................ 234
Section 32.1: ViewFlipper with image sliding
.......................................................................................................... 234
Chapter 33: Design Patterns
............................................................................................................................... 235
Section 33.1: Observer pattern
................................................................................................................................. 235
Section 33.2: Singleton Class Example
.................................................................................................................... 235
Chapter 34: Activity
................................................................................................................................................ 237
Section 34.1: Activity launchMode
............................................................................................................................ 237
Section 34.2: Exclude an activity from back-stack history
................................................................................... 238
Section 34.3: Android Activity LifeCycle Explained
................................................................................................ 238
Section 34.4: End Application with exclude from Recents
.................................................................................... 241
Section 34.5: Presenting UI with setContentView
................................................................................................... 242
Section 34.6: Up Navigation for Activities
............................................................................................................... 243
Section 34.7: Clear your current Activity stack and launch a new Activity
......................................................... 244
Chapter 35: Activity Recognition
...................................................................................................................... 246
Section 35.1: Google Play ActivityRecognitionAPI
.................................................................................................. 246
Section 35.2: PathSense Activity Recognition
........................................................................................................ 248
Chapter 36: Split Screen / Multi-Screen Activities
................................................................................... 250
Section 36.1: Split Screen introduced in Android Nougat implemented
.............................................................. 250
Chapter 37: Material Design
............................................................................................................................... 251
Section 37.1: Adding a Toolbar
................................................................................................................................. 251
Section 37.2: Buttons styled with Material Design
................................................................................................. 252

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