Android
- Getting started with Android
- Awesome Book
- Awesome Community
- Awesome Course
- Awesome Tutorial
- Awesome YouTube
- 9-Patch Images
- Accessing SQLite databases using the ContentValues class
- Accounts and AccountManager
- ACRA
- Activity
- Activity Recognition
- ADB (Android Debug Bridge)
- adb shell
- Adding a FuseView to an Android Project
- AdMob
- AIDL
- AlarmManager
- Android Architecture Components
- Android Authenticator
- Android game development
- Android Java Native Interface (JNI)
- Android Kernel Optimization
- Android NDK
- Android Paypal Gateway Integration
- Android Places API
- Android programming with Kotlin
- Android Sound and Media
- Android Studio
- Android Things
- Android Versions
- Android Vk Sdk
- Android-x86 in VirtualBox
- Animated AlertDialog Box
- Animators
- Annotation Processor
- AsyncTask
- AudioManager
- AudioTrack
- AutoCompleteTextView
- Autosizing TextViews
- Barcode and QR code reading
- Bitmap Cache
- Bluetooth and Bluetooth LE API
- Bluetooth Low Energy
- Bottom Sheets
- BottomNavigationView
- BroadcastReceiver
- Building Backwards Compatible Apps
- ButterKnife
- Button
- Callback URL
- Camera 2 API
- Camera and Gallery
- Canvas drawing using SurfaceView
- Capturing Screenshots
- CardView
- Check Data Connection
- Check Internet Connectivity
- CleverTap
- Colors
- ConstraintLayout
- ConstraintSet
- ContentProvider
- Context
- Convert vietnamese string to english string Android
- CoordinatorLayout and Behaviors
- Count Down Timer
- Crash Reporting Tools
- Create Android Custom ROMs
- Create Singleton Class for Toast Message
- Creating Custom Views
- Creating Overlay (always-on-top) Windows
- Creating Splash screen
- Creating your own libraries for Android applications
- Custom Fonts
- Dagger 2
- Data Binding Library
- Data Encryption/Decryption
- Data Synchronization with Sync Adapter
- Date and Time Pickers
- DayNight Theme (AppCompat v23.2 / API 14+)
- Define step value (increment) for custom RangeSeekBar
- Design Patterns
- Detect Shake Event in Android
- Device Display Metrics
- Dialog
- Displaying Google Ads
- Doze Mode
- Drawables
- EditText
- Email Validation
- Emulator
- Enhancing Alert Dialogs
- Enhancing Android Performance Using Icon Fonts
- Exceptions
- ExoPlayer
- Facebook SDK for Android
- Fast way to setup Retrolambda on an android project.
- Fastjson
- fastlane
- FileIO with Android
- FileProvider
- Fingerprint API in android
- Firebase
- Firebase App Indexing
- Firebase Cloud Messaging
- Firebase Crash Reporting
- Firebase Realtime DataBase
- FloatingActionButton
- Formatting phone numbers with pattern.
- Formatting Strings
- Fragments
- Fresco
- Genymotion for android
- Gesture Detection
- Getting Calculated View Dimensions
- Getting started with OpenGL ES 2.0+
- Getting system font names and using the fonts
- Glide
- Google Awareness APIs
- Google Drive API
- Google Maps API v2 for Android
- Google Play Store
- Google signin integration on android
- Gradle for Android
- GreenDAO
- GreenRobot EventBus
- Gson
- Handler
- Handling Deep Links
- Handling touch and motion events
- Hardware Button Events/Intents (PTT, LWP, etc.)
- How to store passwords securely
- How to use SparseArray
- HttpURLConnection
- Image Compression
- ImageView
- Implicit Intents
- In-app Billing
- Installing apps with ADB
- Instant Run in Android Studio
- Integrate Google Sign In
- Integrate OpenCV into Android Studio
- Intent
- IntentService
- Inter-app UI testing with UIAutomator
- Interfaces
- Internationalization and localization (I18N and L10N)
- Jackson
- Java on Android
- JCodec
- Jenkins CI setup for Android Projects
- Job Scheduling
- JSON in Android with org.json
- Keyboard
- Layouts
- Leakcanary
- Library Dagger 2: Dependency Injection in Applications
- Lint Warnings
- ListView
- Loader
- Loading Bitmaps Effectively
- Localization with resources in Android
- Localized Date/Time in Android
- Location
- Logging and using Logcat
- Looper
- LruCache
- Material Design
- MediaPlayer
- MediaSession
- MediaStore
- Memory Leaks
- Menu
- Moshi
- Multidex and the Dex Method Limit
- MVP Architecture
- MVVM (Architecture)
- NavigationView
- Notification Channel Android O
- Notifications
- OkHttp
- Okio
- Optimized VideoView
- Orientation Changes
- ORMLite in android
- Otto Event Bus
- PackageManager
- Pagination in RecyclerView
- Paint
- Parcelable
- Performance Optimization
- Picasso
- Ping ICMP
- Port Mapping using Cling library in Android
- PorterDuff Mode
- ProgressBar
- ProGuard - Obfuscating and Shrinking your code
- Project SDK versions
- Publish .aar file to Apache Archiva with Gradle
- Publish a library to Maven Repositories
- Publish to Play Store
- Realm
- RecyclerView
- RecyclerView and LayoutManagers
- RecyclerView Decorations
- RecyclerView onClickListeners
- RenderScript
- Resources
- 9 Patches
- Color Transparency(Alpha) Level
- Define a color state list
- Define a menu resource and use it inside Activity/Fragment
- Define colors
- Define dimensions
- Define integer array
- Define integers
- Define string array
- Define String Plurals
- Define strings
- Getting resources without "deprecated" warnings
- Import array of objects defined in resources
- String formatting in strings.xml
- Translate a string
- Working with strings.xml file
- Retrofit2
- Retrofit2 with RxJava
- RoboGuice
- Robolectric
- Runtime Permissions in API-23 +
- SearchView
- Secure SharedPreferences
- Secure SharedPreferences
- Security
- SensorManager
- Service
- Shared Element Transitions
- SharedPreferences
- ShortcutManager
- Sign your Android App for Release
- Smartcard
- Snackbar
- SpannableString
- Speech to Text Conversion
- Spinner
- Split Screen / Multi-Screen Activities
- SQLite
- Storing Files in Internal & External Storage
- Strict Mode Policy : A tool to catch the bug in the Compile Time.
- Supporting Screens With Different Resolutions, Sizes
- Swipe to Refresh
- SyncAdapter with periodically do sync of data
- TabLayout
- TensorFlow
- Testing UI with Espresso
- Text to Speech(TTS)
- TextInputLayout
- TextView
- The Manifest File
- Theme, Style, Attribute
- Thread
- Time Utils
- Toast
- Tools Attributes
- Touch Events
- TransitionDrawable
- Twitter APIs
- Typedef Annotations: @IntDef, @StringDef
- UI Lifecycle
- Unit testing in Android with JUnit
- Universal Image Loader
- Unzip File in Android
- Vector Drawables
- VectorDrawable and AnimatedVectorDrawable
- Vibration
- VideoView
- ViewFlipper
- ViewPager
- Volley
- WebView
- What is ProGuard? What is use in Android?
- Widgets
- Wi-Fi Connections
- Writing UI tests - Android
- XMPP register login and chat simple example
- Xposed
- Youtube-API
- Zip file in android
Example
Hex Opacity Values
------------------------------
| Alpha(%) | Hex Value |
------------------------------
| 100% | FF |
| 95% | F2 |
| 90% | E6 |
| 85% | D9 |
| 80% | CC |
| 75% | BF |
| 70% | B3 |
| 65% | A6 |
| 60% | 99 |
| 55% | 8C |
| 50% | 80 |
| 45% | 73 |
| 40% | 66 |
| 35% | 59 |
| 30% | 4D |
| 25% | 40 |
| 20% | 33 |
| 15% | 26 |
| 10% | 1A |
| 5% | 0D |
| 0% | 00 |
------------------------------
If you want to set 45% to red color.
<color name="red_with_alpha_45">#73FF0000</color>
hex value for red - #FF0000
You can add 73 for 45% opacity in prefix - #73FF0000
