MicroEJ Developer
  • Discover MicroEJ
  • Features
  • VEE
  • SDK
  • Supported Hardware
Get Started
  • Glossary
  • Overview
    • Getting Started
    • MicroEJ Firmware
      • Bootable Binary with Core Services
      • Specification
    • MicroEJ Runtime
      • Language
      • Scheduler
      • Garbage Collector
      • Foundation Libraries
        • Embedded Device Configuration (EDC)
        • Beyond Profile (BON)
    • MicroEJ Libraries
    • Module Repositories
      • MicroEJ Central Repository
        • Use
        • Licensing
        • Changelog
        • Javadoc
      • Developer Repository
        • Use
        • Licensing
        • Changelog
        • Javadoc
        • Community
      • Content Organization
    • Embedded Specification Requests
    • GitHub Repositories
      • Repository Import
      • MicroEJ GitHub Badges
  • SDK User Guide
    • Download and Install
    • System Requirements
    • Workspaces and MicroEJ Repositories
    • SDK Version
    • Licenses
      • License Manager Overview
      • Evaluation Licenses
        • Get your Machine UID
        • Request your Activation Key
        • Install the License Key
        • Troubleshooting
      • Production Licenses
        • Request your Activation Key
        • Activate your USB Dongle
        • Check Activation on MicroEJ SDK
        • Troubleshooting
    • MicroEJ Module Manager
      • Introduction
      • Specification
      • Module Project Skeleton
      • Module Description File
        • Enable MMM Semantic
        • Module Dependencies
        • Automatic Update Before Resolution
        • Build Options
      • MicroEJ Module Manager Configuration
        • Preferences Page
        • Settings File
        • Options
      • Module Build
      • Build Kit
      • Command Line Interface
        • Usage
        • Shared configuration
        • Commands
      • Troubleshooting
        • Unresolved Dependency
        • Invalid Certificate
        • Target “simulator:run” does not exist
      • Meta Build
        • Meta Build creation
        • Meta Build configuration
      • Former MicroEJ SDK Versions (lower than 5.2.0)
        • New MicroEJ Module Project
        • Preferences Pages
        • Build Kit
      • Former MicroEJ SDK Versions (from 5.2.0 to 5.3.x)
        • Build Kit
    • Release Notes
    • SDK Distribution Changelog
      • [21.11] - 2021-11-15
      • [21.03] - 2021-03-25
      • [20.12] - 2020-12-11
      • [20.10] - 2020-10-30
      • [20.07] - 2020-07-28
      • [19.05] - 2019-05-17
      • [19.02] - 2019-02-22
    • SDK Changelog
      • [5.5.2] - 2021-12-22
        • General
        • MicroEJ Module Manager
      • [5.5.1] - 2021-12-02
        • General
      • [5.5.0] - 2021-11-15
        • General
        • MicroEJ Module Manager
      • [5.4.1] - 2021-04-16
        • MicroEJ Module Manager
      • [5.4.0] - 2021-03-25
        • Known Issues
        • General
        • MicroEJ Module Manager
      • [5.3.1] - 2020-12-11
        • General
        • MicroEJ Module Manager
      • [5.3.0] - 2020-10-30
        • Known Issues
        • General
        • MicroEJ Module Manager
      • [5.2.0] - 2020-07-28
        • General
        • MicroEJ Module Manager
        • Misc
      • [5.1.2] - 2020-03-09
        • MicroEJ Module Manager
      • [5.1.1] - 2019-09-26
        • General
      • [5.1.0] - 2019-05-17
        • General
        • MicroEJ Module Manager
      • [5.0.1] - 2019-02-14
        • General
        • MicroEJ Module Manager
    • Migration Notes
      • From 5.2.x to 5.3.x
        • Workspace migration warning
      • From 5.1.x to 5.2.x
        • Enable New Wizards Shortcuts in MicroEJ Perspective
        • Re-enable the Ivy Preferences Pages (Advanced Use)
      • From 4.1.x to 5.x
        • Wadapps Application Update
        • MicroEJ Module Manager Update
        • Meta build Project Update
    • Troubleshooting
      • Windows Specifics
      • Linux Specifics
      • MacOS Specifics
  • Application Developer Guide
    • Introduction
    • Standalone Application
      • MicroEJ Platform Import
        • Source Platform Import
        • Binary Platform Import
      • Build and Run an Application
        • Create a MicroEJ Standalone Application
        • Run on the Simulator
        • Run on the Hardware Device
      • Build Output Files
        • Launch Output Folder
        • Published Module Files
        • The SOAR Map File
        • The SOAR Information File
      • MicroEJ Launch
        • Main Tab
        • Execution Tab
        • Configuration Tab
        • JRE Tab
        • Source Tab
        • Common Tab
      • Application Options
        • Introduction
        • Defining an Option
        • Category: Runtime
        • Category: Simulator
        • Category: Libraries
        • Category: Device
        • Category: Feature
      • SOAR
        • Class Initialization Code
    • Sandboxed Application
      • Sandboxed Application Structure
        • Application Skeleton Creation
        • Sources Folder
        • META-INF Folder
        • module.ivy File
      • Application Publication
        • Build the WPK
      • Shared Interfaces
        • Principle
        • Shared Interface Creation
    • Virtual Device
      • Using a Virtual Device for Simulation
      • Runtime Environment
    • Module Natures
      • Add-On Library
      • Add-On Processor
      • Foundation Library API
      • Foundation Library Implementation
      • Meta Build
      • Mock
      • Module Repository
      • Sandboxed Application
      • Standalone Application
      • Natures Plugins
        • Java Compilation
        • Platform Loader
        • Javadoc
        • Test Suite
        • J2SE Unit Tests
        • Artifact Checker
    • Module Repository
      • Create a Repository Project
      • Configure Resolver for Input Modules
      • Configure Consistency Check
      • Advanced Options
      • Include Modules
        • Include a Single Module
        • Include a Module Repository
      • Generate Javadoc
      • Build the Repository
      • Use the Offline Repository
    • MicroEJ Classpath
      • Application Classpath
      • Classpath Load Model
      • Classpath Elements
        • Application Entry Points
        • Types
        • Raw Resources
        • Immutable Objects
        • System Properties
        • Constants
    • Application Resources
      • Images
        • Overview
      • Fonts
        • Overview
        • Font Range
        • Custom Range
        • Known Range
        • Transparency
      • Native Language Support
    • NLS External Loader
      • Installation
      • Usage
      • Troubleshooting
        • java.io.IOException: NLS-PO:S=4
      • Crowdin
    • Debug an Application
      • Add-On Library Sources
      • Foundation Library Sources
    • Platform Selection
    • Development Tools
      • Test Suite with JUnit
        • Principle
        • JUnit Compliance
        • Setup a Platform for Tests
        • Setup a Project with a JUnit Test Case
        • Build and Run a JUnit Test Suite
        • Test Suite Reports
        • Advanced Configurations
      • Stack Trace Reader
        • Principle
        • Functional Description
        • Dependencies
        • Installation
        • Use (Standalone Application)
        • Use (Sandboxed Application)
        • Stack Trace Reader Options
      • Code Coverage Analyzer
        • Principle
        • Functional Description
        • Dependencies
        • Installation
        • Use
      • Heap Usage Monitoring
        • Introduction
        • Heap Usage Introspection
        • Automatic Heap Usage Monitoring
        • Heap Usage Analysis
      • Heap Dumper & Heap Analyzer
        • Introduction
        • Heap Dumper
        • Heap Viewer
        • Progressive Heap Usage
        • Compare Heap Dumps
      • ELF to Map File Generator
        • Principle
        • Functional Description
        • Installation
        • Use
      • Serial to Socket Transmitter
        • Principle
        • Installation
        • Use
      • Memory Map Analyzer
        • Principle
        • Functional Description
        • Dependencies
        • Installation
        • Use
      • Event Tracing
        • Description
        • Event Recording
        • Java API Usage
        • Platform Implementation
      • Null Analysis
        • Principle
        • Java Code Annotation
        • Module Project Configuration
        • MicroEJ Libraries
        • Advanced Use
    • Advanced Tools
      • MicroEJ Linker
        • Overview
        • ELF Overview
        • Linking Process
        • Linker Specific Configuration File Specification
        • Auto-generated Sections
        • Execution
        • Error Messages
        • Map File Interpretor
      • MicroEJ Test Suite Engine
        • Introduction
        • Using the MicroEJ Test Suite Ant Tasks
        • Using the Trace Analyzer
        • Appendix
    • Graphical User Interface
      • MicroUI
        • Introduction
        • Images
        • Fonts
        • Font Designer
        • Application Options
        • Debug Traces
        • Error Messages
        • Migration Guide
      • MWT (Micro Widget Toolkit)
        • Introduction
        • Concepts
        • How to Create a Widget
        • How to Create a Container
        • How to Animate a Widget
        • How to Define an Outline or Border
        • How to Define a Background
        • How to Create a Desktop Event Dispatcher
        • How to Define an Extra Style Field
        • How to Use the Overlap Render Policy
        • How to Debug
      • Widgets and Examples
        • Widget Library
        • Widget Demo
        • MWT Examples
      • Advanced
        • How to Detect Text Overflow
    • JavaScript
      • Getting Started
      • Sources Management
        • JavaScript Sources Location
        • JavaScript Sources Load Order
        • JavaScript Sources Load Scope
        • JavaScript Sources Processing
      • Examples
        • Simple Application
        • Use a Java API in JavaScript
        • Create a JavaScript API from Java
      • API
        • Built-in Objects
        • Host Objects
      • Communication Between Java and JS
        • JavaScript Engine
        • Calling Java from JavaScript
        • Calling JavaScript from Java
        • Passing Values Between JavaScript and Java
      • Tests
      • Limitations
        • Unsupported Directives
        • Unsupported Statements
        • Unsupported Built-in Objects
      • Troubleshooting
        • Compilation error cannot be resolved to a type in FFI class
      • Internals
        • JavaScript Sources Processing
        • Foreign Function Interface
    • Networking
      • Foundation Libraries
      • Add-On Libraries
        • IoT Libraries
        • Data Serialization Libraries
        • Cloud Agent Libraries
    • Limitations
  • Platform Developer Guide
    • Introduction
      • Scope
      • Intended Audience
    • MicroEJ Platform
      • Introduction
      • Build Process
      • Concepts
        • MicroEJ Platform Configuration
        • Modules
        • Low Level API Pattern
    • MicroEJ Architecture
      • Naming Convention
      • MicroEJ Architectures Changelog
        • Notation
        • [7.16.0] - 2021-06-24
        • [7.15.1] - 2021-02-19
        • [7.15.0] - 2020-12-17
        • [7.14.1] - 2020-11-30
        • [7.14.0] - 2020-09-25
        • [7.13.3] - 2020-09-18
        • [7.13.2] - 2020-08-14
        • [7.13.1] - 2020-07-20
        • [7.13.0] - 2020-07-03
        • [7.12.0] - 2019-10-16
        • [7.11.0] - 2019-06-24
        • [7.10.1] - 2019-04-03
        • [7.10.0] - 2019-03-29
        • [7.9.1] - 2019-01-08
        • [7.9.0] - 2018-09-20
        • [7.8.0] - 2018-08-01
        • [7.7.0] - 2018-07-19
        • [7.6.0] - 2018-06-29
        • [7.5.0] - 2018-06-15
        • [7.4.0] - 2018-06-13
        • [7.3.0] - 2018-03-07
        • [7.2.0] - 2018-03-02
        • [7.1.2] - 2018-02-02
        • [maintenance/6.18.0] - 2017-12-15
        • [7.1.1] - 2017-12-08
        • [7.1.0] - 2017-12-08
        • [7.0.0] - 2017-11-07
        • [6.17.2] - 2017-10-26
        • [6.17.1] - 2017-10-25
        • [6.17.0) - 2017-10-10
        • [6.16.0] - 2017-09-27
        • [6.15.0] - 2017-09-12
        • [6.14.2] - 2017-08-24
        • [6.14.1] - 2017-08-02
        • [6.13.0] - 2017-07-21
        • [6.12.0] - 2017-07-07
        • [6.11.0] - 2017-06-13
        • [6.11.0-beta1] - 2017-06-02
        • [6.10.0] - 2017-06-02
        • [6.9.2] - 2017-06-02
        • [6.9.1] - 2017-05-29
        • [6.9.0] - 2017-03-15
    • MicroEJ Packs
      • Overview
      • Naming Convention
        • Architecture Specific Pack
        • Generic Pack
    • Platform Creation
      • Architecture Selection
      • Platform Configuration
      • Pack Import
      • Platform Build
      • Platform Module Configuration
      • Platform Customization
      • BSP Connection
        • Principle
        • Options
        • Build Script File
        • Run Script File
    • Platform Qualification
      • Introduction
      • Platform Qualification Tools Overview
      • Platform Test Suite
      • Test Suite Versioning
        • Core Engine
        • UI Pack
        • FS Pack
        • BLUETOOTH Pack
        • NET/SSL Pack
    • MicroEJ Core Engine
      • Functional Description
      • Architecture
      • Capabilities
      • Implementation
        • Initialization
        • Scheduling
        • Idle Mode
        • Time
        • Error Codes
        • Example
        • Dump the States of the Core Engine
        • Check Internal Structure Integrity
      • Generic Output
      • Link
      • Dependencies
      • Installation
      • Use
    • Multi-Sandbox
      • Principle
      • Functional Description
      • Memory Considerations
      • Dependencies
      • Installation
      • Use
    • Tiny Application
      • Principle
      • Installation
      • Limitations
    • Native Interface Mechanisms
      • Simple Native Interface (SNI)
        • Principle
        • Functional Description
        • Example
        • Synchronization
        • Dependencies
        • Installation
        • Use
      • Shielded Plug (SP)
        • Principle
        • Functional Description
        • Shielded Plug Compiler
        • Example
        • Dependencies
        • Installation
        • Use
      • MicroEJ Java H
        • Principle
        • Functional Description
        • Dependencies
        • Installation
        • Use
    • External Resources Loader
      • Principle
      • Functional Description
      • Implementations
        • Open a Resource
        • Resource Identifier
        • Resource Offset
        • Resource Inside the CPU Address Space Range
      • External Resources Folder
      • Dependencies
      • Installation
      • Use
    • Serial Communications
      • ECOM
        • Principle
        • Functional Description
        • Device Management API
        • Dependencies
        • Installation
        • Use
      • ECOM Comm
        • Principle
        • Functional Description
        • Component Architecture
        • Comm Port Identifier
        • Dynamic Connections
        • Java API
        • Driver API
        • BSP File
        • XML File
        • ECOM Comm Mock
        • Dependencies
        • Installation
        • Use
    • Graphical User Interface
      • Principle
      • MicroUI
        • Principle
        • Architecture
        • Thread
        • Native Calls
        • Transparency
        • Installation
        • Use
      • Static Initialization
        • Principle
        • Functional Description
        • XML File
        • XML File Example
        • Dependencies
        • Installation
        • Use
      • Low Level API
        • Principle
        • Embedded Platform
        • Simulator
      • LED
        • Principle
        • Functional Description
        • Low Level API
        • Dependencies
        • Installation
        • Use
      • Input
        • Principle
        • Functional Description
        • Driver Listener
        • Static Initialization
        • Standard Event Generators
        • Generic Event Generators
        • Low Level API
        • Event Buffer
        • Dependencies
        • Installation
        • Use
      • Display
        • Principle
        • Functional Description
        • Display Configurations
        • Buffer Modes
        • Partial Buffer
        • Byte Layout
        • Memory Layout
        • Pixel Structure
        • Low Level API
        • Drawing Native
        • Display Synchronization
        • GPU Synchronization
        • Antialiasing
        • CLUT
        • Image Pixel Conversion
        • Library ej.api.Drawing
        • Dependencies
        • Installation
        • Use
      • Images
        • Overview
        • Image Format
        • Image Generator
        • Image Loader
        • Image Renderer
      • Fonts
        • Overview
        • Font Characteristics
        • Font Generator
        • Font Renderer
      • Simulation
        • Principle
        • Module Dependencies
        • MicroUI Implementation
        • Widget Display
        • Custom Drawings
        • New Drawings
        • Inputs Extensions
        • Heap Simulation
        • Image Decoders
        • Dependencies
        • Installation
        • Use
      • Release Notes
        • MicroEJ Architecture Compatibility Version
        • Foundation Libraries
        • Abstraction Layer Interface
        • Front Panel API
        • Image Generator API
        • C Module
      • Changelog
        • [13.1.0] - 2021-08-03
        • [13.0.7] - 2021-07-30
        • [13.0.6] - 2021-03-29
        • [13.0.5] - 2021-03-08
        • [13.0.4] - 2021-01-15
        • [13.0.3] - 2020-12-03
        • [13.0.2] - 2020-10-02
        • [13.0.1] - 2020-09-22
        • [13.0.0] - 2020-07-30
        • [12.1.5] - 2020-10-02
        • [12.1.4] - 2020-03-10
        • [12.1.3] - 2020-02-24
        • [12.1.2] - 2019-12-09
        • [12.1.1] - 2019-10-29
        • [(maint) 8.0.0] - 2019-10-18
        • [12.1.0] - 2019-10-16
        • [12.0.2] - 2019-09-23
        • [12.0.1] - 2019-07-25
        • [12.0.0] - 2019-06-24
        • [11.2.0] - 2019-02-01
        • [11.1.2] - 2018-08-10
        • [11.1.1] - 2018-08-02
        • [11.1.0] - 2018-07-27
        • [11.0.1] - 2018-06-05
        • [10.0.2] - 2018-02-15
        • [11.0.0] - 2018-02-02
        • [10.0.1] - 2018-01-03
        • [10.0.0] - 2017-12-22
        • [9.4.1] - 2017-11-24
        • [9.4.0] - 2017-11-23
        • [9.3.1] - 2017-09-28
        • [9.3.0] - 2017-08-24
        • [9.2.1] - 2017-08-14
        • [9.2.0] - 2017-07-21
        • [9.0.2] - 2017-04-21
        • [9.1.2] - 2017-03-16
        • [9.0.1] - 2017-03-13
        • [9.1.1] - 2017-02-14
        • [9.1.0] - 2017-02-13
        • [9.0.0] - 2017-02-02
        • [8.1.0] - 2016-12-24
        • [8.0.0] - 2016-11-17
        • [7.4.7] - 2016-06-14
        • [7.4.2] - 2016-05-25
        • [7.4.1] - 2016-05-10
        • [7.4.0] - 2016-04-29
        • [7.3.0] - 2016-04-25
        • [7.2.1] - 2016-04-18
        • [7.2.0] - 2016-04-05
        • [7.1.0] - 2016-03-02
        • [7.0.0] - 2016-01-20
        • [6.0.1] - 2015-12-17
        • [6.0.0] - 2015-11-12
      • Migration Guide
        • From 13.0.x to 13.1.x
        • From 12.x to 13.x
        • From 11.x to 12.x
        • From 10.x to 11.x
        • From 9.x to 10.x
        • From 8.x to 9.x
        • From 7.x to 8.x
    • Networking
      • Principle
      • Network Core Engine
        • Principle
        • Functional Description
        • Dependencies
        • Installation
        • Use
      • SSL
        • Principle
        • Functional Description
        • Dependencies
        • Installation
        • Use
    • File System
      • Principle
      • Functional Description
      • Dependencies
      • Installation
        • Properties File Template
      • Use
    • Hardware Abstraction Layer
      • Principle
      • Functional Description
      • Identifier
        • Basic Rule
        • Generic Rules
      • Configuration
      • Dependencies
      • Installation
      • Use
    • Device Information
      • Principle
      • Dependencies
      • Installation
      • Use
    • Watchdog Timer
      • Overview
      • Principle
      • Mock Implementation
      • Dependencies
      • Installation
      • Use in an Application
      • Code example in Java
      • Use in C inside the BSP
      • Code example in C
    • SystemView
      • Principle
      • References
      • Installation
      • MicroEJ Core Engine OS Task
      • OS Tasks and Java Threads Names
      • OS Tasks and Java Threads Priorities
      • Use
      • Troubleshooting
        • SystemView doesn’t see any activity in MicroEJ Tasks
        • OVERFLOW Events in SystemView
        • RTT Control Block Not Found
      • RTT block found by SystemView but no traces displayed
      • Bus hardfault when running SystemView without Java Virtual Machine (JVM)
      • SystemView for STM32 ST-Link Probe
    • Simulation
      • Principle
      • Functional Description
      • Dependencies
      • Installation
      • Use
      • Mock
        • Principle
        • Functional Description
        • Example
        • Mocks Design Support
        • Dependencies
        • Installation
        • Use
      • Shielded Plug Mock
        • General Architecture
        • Configuration
      • Front Panel Mock
        • Principle
        • Functional Description
        • The Front Panel Project
        • Module Dependencies
        • Front Panel File
        • Widget
        • Installation
        • Use
      • Bluetooth LE Mock
        • Overview
        • Requirements
        • Usage
        • Troubleshooting
    • Appendices
      • Low Level API
        • LLMJVM: MicroEJ Core Engine
        • LLKERNEL: Multi-Sandbox
        • LLSP: Shielded Plug
        • LLEXT_RES: External Resources Loader
        • LLCOMM: Serial Communications
        • LLUI_INPUT: Input
        • LLUI_DISPLAY: Display
        • LLUI_LED: LEDs
        • LLNET: Network
        • LLNET_SSL: SSL
        • LLFS: File System
        • LLHAL: Hardware Abstraction Layer
        • LLDEVICE: Device Information
        • LLWATCHDOG_TIMER: Watchdog Timer
      • MicroEJ Foundation Libraries
        • EDC
        • SNI
        • KF
        • ECOM
        • ECOM Comm
        • FS
        • Net
        • SSL
      • Tools Options and Error Codes
        • SOAR
        • Immutable Files Related Error Messages
        • SNI
        • SP Compiler
        • NLS Immutables Creator
        • MicroUI Static Initializer
        • Front Panel
        • HIL Engine
        • Heap Dumping
      • Architectures MCU / Compiler
        • Principle
        • Supported MicroEJ Core Engine Capabilities by Architecture Matrix
        • ARM Cortex-M0
        • ARM Cortex-M4
        • ARM Cortex-M7
        • ESP32
        • IAR Linker Specific Options
      • Former Platform Migration
        • Create an Architecture Repository
        • Install the Platform Configuration Additions
        • Update Front Panel Configuration
        • Configure BSP Connection
        • Add Build Script and Run Script
        • Going further
  • Kernel Developer Guide
    • Overview
      • Introduction
      • Terms and Definitions
      • Overall Architecture
      • Multi-Sandbox Build Flow
        • Firmware Build Flow
        • Virtual Device Build Flow
      • Firmware Implementation Libraries
    • Kernel & Features Specification
    • Getting Started
      • Online Getting Started
      • MicroEJ Demo VEE Flavors
        • What is a MicroEJ Demo Runtime Environment?
        • What is a MicroEJ Demo Flavor?
    • Multi-Sandbox Firmware Creation
      • Create a new Firmware Project
      • Configure a Platform
      • Build the Firmware and Virtual Device
      • Define a Runtime Environment
        • Specify Kernel APIs
        • Create a Runtime API Module
      • Add System Applications
      • Build Firmware using Meta Build
      • Build Firmware using MicroEJ Launches
      • Advanced
        • MicroEJ Firmware module.ivy
        • Build only a Firmware
        • Build only a Virtual Device
        • Build only a Virtual Device with a pre-existing Firmware
    • Writing Kernel APIs
      • Default Kernel APIs Derivation
      • Build a Kernel API Module
      • Kernel API Generator
        • Category: Kernel API Generator
    • Communication between Features
    • Multi-Sandbox Enabled Libraries
      • MicroUI
        • Physical Display Ownership
        • Automatically Reclaimed Resources
      • BON
        • Kernel Timer
        • Automatically Reclaimed Resources
      • ECOM
      • ECOM-COMM
      • FS
      • NET
      • SSL
    • Setup a KF Test Suite
      • Enable the Test Suite
      • Add a KF Test
      • KF Test Suite Options
    • Kernel Linking
      • Link Flow
      • Kernel Metadata Generation
      • Firmware Linker
    • Application Linking
      • SOAR Build Phases
      • Feature Build Off Board
      • Feature Build On Device
        • General Workflow
        • Implement the Kernel
      • Compatibility Rules
  • Tutorials
    • Understand how to build a MicroEJ Firmware and its dependencies
      • The Components
        • MicroEJ Architecture (.xpf, .xpfp)
        • MicroEJ Platform Source (.zip)
        • MicroEJ Application
        • C Toolchain (GCC, KEIL, IAR, …)
        • Module Repository
        • Dependencies Between Components
      • How to Build
        • Build a MicroEJ Platform
        • Build a MicroEJ Firmware
        • Dependencies Between Processes
    • Create a MicroEJ Platform for a Custom Device
      • Introduction
      • A MicroEJ Platform Project is already available for the same MCU/RTOS/C Compiler
        • Platform
        • BSP
        • Simulator
      • A MicroEJ Platform Project is not available for the same MCU/RTOS/C Compiler
        • MCU
        • RTOS
        • C Compiler
      • Platform Validation
      • Further Assistance Needed
    • Create a MicroEJ Firmware From Scratch
      • Intended Audience
      • Introduction
      • Prerequisites
      • Overview
      • Setup the Development Environment
      • Get Running BSP
      • FreeRTOS Hello World
      • Create a MicroEJ Platform
        • Import the MicroEJ Architecture
        • Install an Evaluation License
        • Create the MicroEJ Platform
        • Setup the MicroEJ Platform
      • Create MicroEJ Application HelloWorld
      • Configure BSP Connection in MicroEJ Application
      • MicroEJ and FreeRTOS Integration
        • Minimal Low Level APIs
        • Invoke MicroEJ Core Engine
        • Build and Link the Firmware with the MicroEJ Runtime and MicroEJ Application
    • Create MicroEJ Platform Build and Run Scripts
      • Intended Audience
      • Prerequisites
      • Introduction
      • Overview
      • Create Build and Run Scripts
        • Create build.sh and run.sh Scripts
        • Create build.bat and run.bat Scripts
      • Use Build Script in MicroEJ SDK
        • Build Firmware from MicroEJ SDK
        • Convert from partial BSP connection to full BSP connection (optional)
      • Going Further
    • Setup an Automated Build using Jenkins and Artifactory
      • Intended Audience
      • Introduction
      • Prerequisites
      • Overview
      • Install the Build Tools
      • Get a Module Repository
      • Setup Artifactory
        • Install and Start Artifactory
        • Configure Artifactory
        • Create Repositories
        • Import MicroEJ Repositories
      • Setup Jenkins
        • Install Jenkins
        • Configure Jenkins
        • Create a Job Template
      • Build a new Module using Jenkins
        • Create a new MicroEJ Module
        • Create a New Jenkins Job
        • Build the “Hello World” Application
      • Appendix
        • Customize Jenkins
        • Customize target~ path
    • Improve the Quality of Java Code
      • Intended Audience
      • Readable Code
        • Naming Convention
        • Visibility
        • Javadoc
        • Code Convention
        • Code Style and Formatting
      • Best Practices
        • Common Pitfalls
        • Simplify Maintenance
        • Basic Optimizations
        • Local Extraction
        • Equals and Hashcode
      • Related Tools
        • Unit Testing
        • Code Analysis with SonarQube™
    • Optimize the Memory Footprint of an Application
      • Intended Audience
      • Introduction
      • How to Analyze the Footprint of an Application
        • How to Analyze the Files Generated by the MicroEJ Linker
        • How to Analyze a Map File Generated by a Third-Party Linker
      • How to Reduce the Image Size of an Application
        • Application Resources
        • Application Code
        • MicroEJ Platform Configuration
        • Application Configuration
        • Stripping Class Names from an Application
      • How to Reduce the Runtime Size of an Application
        • Application Code
        • MicroEJ Platform Configuration
        • Application Configuration
    • Explore Data Serialization Formats
      • Intended Audience
      • XML
        • XML Module
        • Example Of Use
      • JSON
        • JSON Module
        • Example Of Use
      • CBOR
        • CBOR Module
        • Example Of Use
    • Instrument Java Code for Logging
      • Intended Audience
      • Introduction
      • Overview
      • Log with the Trace Library
      • Log with the Message Library
      • Log with the Logging Library
      • Remove Logging Related Code
        • Wrap with a Constant If Statement
        • Shrink Code Using ProGuard
    • Run a Test Suite on a Device
      • Intended Audience and Scope
      • Prerequisites
      • Introduction
      • Import the Test Suite
      • Configure the Test Suite
        • Select the Test Suite Version
        • Configure the Platform BSP Connection
        • Configure Execution Trace Redirection
        • Start Serial To Socket
        • Configure the Test Suite Specific Options
      • Run the Test Suite
      • Configure the Tests to Run
      • Examine the Test Suite Report
    • Implement a Blocking Java Native Method with SNI
      • Intended Audience
      • Prerequisites
      • Overview
      • Requirements
      • Example Code
        • Application Behavior
      • Implement a Non-Blocking Method
        • Update the C Native Function Implementation
        • Application Behavior
    • Get Started With GUI
      • Setup your Environment
        • Prerequisites
        • Download and Install
        • Start the IDE for the First Time
        • Prepare Platform Sources
        • Create a New Project
        • Featured Project: Widget Demo
      • Starting MicroUI
        • Widgets
        • Desktop Usage
        • Displaying a Label
      • Basic Drawing on Screen
        • Drawing Basic Shapes
        • Drawing Images
        • Drawing Thick Shapes
      • Animation
        • Usage
      • Creating Widgets
        • Setting Up
        • Using with Animator
      • Using Layouts
        • Using a Flow Layout
        • Using a Canvas
      • Style
        • Selectors
      • Images
        • Adding Images
        • Displaying an Image
      • Advanced Styling
        • Using Images in Stylesheet
        • Class Selector
        • Combinator and Conditional Style
      • Event Handling
        • The handleEvent Method
        • Using Events with Buttons
      • Fonts
        • Creating a font
        • Adding the Font to a Label
      • Scroll List
        • List
        • Scrollable List
      • Creating a Contact List using Scroll List
        • Creating the Contact Widget
      • Internationalization
        • Using PO Files
        • Configuring NLS in MicroEJ
        • Usage
    • Discover Embedded Debugging Techniques
      • Intended Audience
      • Debugging Tools
        • Events Tracing and Logging
        • Runtime State Dump
        • Memory Inspection
        • Platform Qualification
        • Simulator Debugger
        • Static Analysis Tools
        • GUI Debugging Tools
      • Use Case 1: Debugging a GUI Application Freeze
        • Check RTOS Tasks Scheduling
        • Check Java Threads Scheduling
        • Check UI Thread Liveness
        • Check Input Events Processing
        • Implementation Details
      • Use Case 2: Debugging a HardFault
        • Useful Resources
        • Exceptions, HardFaults And Exception Handler
        • What To Do In Exception Handlers?
        • Memory Protection Unit (MPU)
        • Memory Corruption
        • Investigation
        • When a HardFault Occurs
        • Memory Dump Analysis
        • Trigger a VM Dump
  • Get Support
  • About MicroEJ
MicroEJ Documentation
  • HOME  /
  • Application Developer Guide  /
  • Graphical User Interface  /
  • MicroUI

MicroUI¶

  • Introduction
  • Images
    • Overview
    • Configuration File
    • Images Heap
    • Output Formats
    • Image Generator Error Messages
  • Fonts
    • Overview
    • Configuration File
    • Font Range
    • Transparency
    • Font Generator Error Messages
  • Font Designer
    • Principle
    • Functional Description
    • Font Management
    • Dependencies
    • Installation
    • Use
  • Application Options
    • Category: Libraries
  • Debug Traces
    • Trace format
    • Trace identifiers
    • SystemView Integration
  • Error Messages
  • Migration Guide
    • From 12.x to 13.x
    • From 10.x to 12.x
    • From 9.x to 10.x
Next Previous

© Copyright 2008-2022, MicroEJ Corp. Content in this space is free for read and redistribute. Except if otherwise stated, modification is subject to MicroEJ Corp prior approval. MicroEJ is a trademark of MicroEJ Corp. All other trademarks and copyrights are the property of their respective owners. Revision 7a753fc3.

Read the Docs v: latest
Versions
20211122
20210521
20201009
latest
update-watchdog-with-glossary-case-sensitive-terms
rollback-pqt-to-previous-title
revert-139-feature-m0078ddg-355_improve_mmm_doc
rename_to_api_dd
release-m0228j-105_microjs-0.4.0
reduce_pqt_schematics_again
patch-table-support
offlinerepo_missing_configuration
mock-installation-typo-fix
mock-clarify-install-procedure
m0078ddg-26-fix_limitation_chapter
javascript-0.9.0
javascript-0.8.0
javascript-0.6.0
javascript-0.5.0
javascript-0.4.0
javascript-0.10.0
javascript-0.1.0
hotfix-m0078ddg-428_replace_artifactory_link_to_make_the_build_pass_and_update_bin_path
gjadi-serial-to-socket-add-label
gjadi-request_activation_key_anchor
gjadi-platform-fs-add-label
gjadi-platform-editor
gjadi-platform-concept-add-label
gjadi-mock-unsatisfiedlinkerror
gjadi-mej-patch-eval-prod-pca-switch
gjadi-mej-patch-2
gjadi-mej-patch-1
gjadi-fix-mmm-link
fix-uimicroui_typo
fix-typo-licenses
fix-tutorialcreateplatformbuildandrunscripts_typo
fix_rename_artifacts_to_modules
fix_platformoverview_ordered_list
fixmmmoption
fix-mmm-code-block
fix-link
fix-build-warnings
feature-warn_sys_props_only_for_standalone_apps
feature-warn_constant_from_bon_constant_does_not_remove_the_code
feature-update-kifaru-infographic
feature-update_copyright_to_2022
feature-tutorial_null_annotations_java_8_and_up
feature-tuto_fix_sdk_version
feature-theming-tutorial
feature-test-oom
feature-review_dbg_tuto
feature-remove_unstable_cbor.me_link
feature-remove_microui_as_esr
feature-remove-limitations
feature-private_nested_fields_footprint
feature-overview-rework
feature-overlap-render-policy
feature-nullanalysis_external_annotations
feature-microui-threading
feature-menu_issue
feature-m0228j-91_cli-release-0.1.0
feature-m0228j-87_change_js_main_folder
feature-m0228j-74_clean-doc
feature-m0228j-65_switch_limitations
feature-m0228j-473_update_kifaru_doc
feature-m0228j-43_microjs
feature-m0228j-41_microjs_testsuite
feature-m0228j-418_microjs-host-objects
feature-m0228j-389_enrich-doc
feature-m0228j-302_troubleshooting
feature-m0228j-233_check-tests-failures
feature-m0228j-225_check-tests-function
feature-m0228j-216_check-tests-global
feature-m0228j-211_js_test_suite_files
feature-m0228j-20
feature-m0228j-174_string_prototype
feature-m0228j-171_check-tests-on-object
feature-m0228j-168_json_stringify
feature-m0228j-156_check-array-tests
feature-m0228j-149_microjs_check_errors
feature-m0228j-148_exclude-number-tostring
feature-m0228j-140_add-limitations
feature-m0228j-136_microjs_use_strict
feature-m0228j-116_delete-and-instanceof-operators
feature-m0137w-616_enable-linkcheck
feature-m0137w-616_disable-linkcheck
feature-m0137w-578_event_handling
feature-m0137w-545_update_doc_broken_links_to_central_repo_3
feature-m0137w-498_sdk-overview
feature-m0131pc-182_update_java_rules
feature-m0131pc-178_review_github_badge
feature-m0127cc-686_improve_mui_traces_doc
feature-m0127cc-686_add_systemview_screenshot
feature-m0127cc-686_add-missing-links
feature-m0127cc-641_review_tutorialplatformfromscratch
feature-m0127cc-629_tutorial_non_blocking_sni
feature-m0127cc-628_move_license_usage_tutorial
feature-m0127cc-628_add_dongle_picture
feature-m0127cc-611_xml_article
feature-m0127cc-611_json_article
feature-m0127cc-611_github_article
feature-m0127cc-611_data_formats_tutorial
feature-m0127cc-568_tutorialbuildmicroejfirmware
feature-m0092mejaui-2278_ui_kf2
feature-m0092mejaui-2278_ui_kf
feature-m0092mejaui-2259_release_notes
feature-m0090ide-3742_sdk-5.5.2
feature-m0090ide-3733_sdk-5.5.1
feature-m0090ide-3636_cc_sources_default_value
feature-m0090ide-3636_cc_sources
feature-m0090ide-3596_update_kf_testsuite
feature-m0090ide-3586_sdk_5.5.0_document_changelog_checker
feature-m0090ide-3586_sdk_5.5.0
feature-m0090ide-3582_adoptopenjdk-install
feature-m0090ide-3565_mmm-cli_add_supported_os
feature-m0090ide-3546_mmm-cli_friviere_review
feature-m0090ide-3546_mmm-cli
feature-m0090ide-3476_cli-init-command
feature-m0081meja-1586_document_known_issue
feature-m0081meja-1416_architecture_7.16.0_changelog
feature-m0081meja-1365_timer_clinit_kf
feature-m0081meja-1158_heap_usage
feature-m0081meja-1048_add_notify_hooks_in_mock_snippet
feature-m0078ddg-457_trace_method_invocation
feature-m0078ddg-456_ui_pack_13.2.0
feature-m0078ddg-455_developer_repo
feature-m0078ddg-452_explain_module_repo_javadoc
feature-m0078ddg-447_link_ccanalyzer_and_ccoption
feature-m0078ddg-444_nls-api
feature-m0078ddg-442_add_development_tools_dependency_discoverer
feature-m0078ddg-441_sdk-studio
feature-m0078ddg-440_known-issue-sdk-update-macos
feature-m0078ddg-439_document_soar_app_link_flow
feature-m0078ddg-439_cleanup_kdg_for_sdk_5
feature-m0078ddg-438_macos-sdk-quarantine
feature-m0078ddg-437_pltform-creation-cli
feature-m0078ddg-434_remove-unreleased-features
feature-m0078ddg-434_module-natures-released-features
feature-m0078ddg-433_artifactory-7
feature-m0078ddg-432_fix_font_size_nested_glossary
feature-m0078ddg-431_update_glossary
feature-m0078ddg-430_fix_systemview_typo
feature-m0078ddg-429_ui_pack_13.1.0_links
feature-m0078ddg-429_ui_pack_13.1.0
feature-m0078ddg-427_test-suite-verbose
feature-m0078ddg-426_reconnect_permalinks
feature-m0078ddg-425_fix_typos_on_platform_creation_page
feature-m0078ddg-423_document_cached_warnings
feature-m0078ddg-422_platform-selection-source
feature-m0078ddg-419_remove_unicode_org_links
feature-m0078ddg-419_quickfix_link_unicode_org
feature-m0078ddg-417_documentation_library_iot_with_javadoc_link
feature-m0078ddg-417_documentation_library_iot
feature-m0078ddg-415_soar-clinit-cycle
feature-m0078ddg-411_overview-rework
feature-m0078ddg-410_remove-microej-labels
feature-m0078ddg-409_refactor_move_platform_architecture_packs
feature-m0078ddg-409_move_manual_download
feature-m0078ddg-406_migrate_sdk_release_notes
feature-m0078ddg-402_linkcheck_build
feature-m0078ddg-402_fix_wrong_reference
feature-m0078ddg-402_fix_links
feature-m0078ddg-401_watchdog_fl_public_doc
feature-m0078ddg-400_ci-bundle-tuto
feature-m0078ddg-399_document_troubleshooting_http_ssl_traces
feature-m0078ddg-398_migration_architecture_changelog
feature-m0078ddg-384_add_troubleshooting_restart_with_admin_privileges
feature-m0078ddg-383_add_allow_unsigned_software
feature-m0078ddg-382_small_theme_fixes
feature-m0078ddg-380_rename_graphics_engine
feature-m0078ddg-379_test_and_review_ci_tuto
feature-m0078ddg-378_replace_diagrams
feature-m0078ddg-377_modules-natures-fixes
feature-m0078ddg-377_easyant-reference_friviere_review
feature-m0078ddg-377_easyant-reference
feature-m0078ddg-375_fix_mixup_stacktracereader
feature-m0078ddg-374_add_abstraction_layer_to_glossary
feature-m0078ddg-370_ui_tools
feature-m0078ddg-368_warnings-are-errors
feature-m0078ddg-361_add_about_page
feature-m0078ddg-360_add_videos
feature-m0078ddg-355_improve_mmm_doc
feature-m0078ddg-354_protobuf_tutorial
feature-m0078ddg-353_cbor_tutorial_section
feature-m0078ddg-352_document_platform_step3
feature-m0078ddg-348_data_formats_tutorial
feature-m0078ddg-344_nls-external-loader
feature-m0078ddg-342_move_target_folder
feature-m0078ddg-341_add-nls-chapter
feature-m0078ddg-340_footprint
feature-m0078ddg-333_sync_how_to_get_platforms_section
feature-m0078ddg-331_footprint
feature-m0078ddg-331_coding_rules
feature-m0078ddg-330_scale_platformdevguide_images
feature-m0078ddg-308_tutorial_debug_ui_freeze
feature-m0078ddg-308_tutorial_debug_applications
feature-m0078ddg-297_document_get_sources
feature-m0078ddg-282_mwt_merge
feature-m0078ddg-282_mwt
feature-m0078ddg-281_systemview_backup_friviere
feature-m0078ddg-281_systemview
feature-m0078ddg-278_toolbox_margin
feature-m0078ddg-277_ui3
feature-m0078ddg-270_fix_typo
feature-m0078ddg-270_add_tutorial_log_trace_in_application
feature-m0078ddg-266_ej_api_trace
feature-m0078ddg-264
feature-m0078ddg-248_update_sdk_overwiew_schematic
feature-m0078ddg-23_update_error_code
feature-m0078ddg-172_document_null_analysis_enhance_nonnullbydefault
feature-m0078ddg-172_document_null_analysis
feature-m0074fs-193_various_spaces_fixes_and_guilabels
feature-m0074fs-193_fs_config
feature-m0018pqt-288_core_ui_test_suite_versioning
feature-m0018pqt-277_overview_pqt_friviere_review
feature-m0018pqt-277_overview_pqt
feature-m0018pqt-274_build_scripts_tutorial_friviere_review
feature-m0018pqt-274_build_scripts_tutorial
feature-m0018pqt-259_doc_application_file
feature-m0018pqt-259_augment_run_script_specification_with_executable_as_parameter
feature-m0018pqt-253_microej_pack_naming_convention
feature-m0018pqt-250_tuto_fullpackaging_convertion_friviere_review
feature-m0018pqt-250_tuto_fullpackaging_convertion
feature-m0018pqt-248_document_run_bat
feature-m0018pqt-236-update-tuto-from-scratch
feature-m0018pqt-234_pca_dep_private_conf
feature-m0018pqt-214_get_target.platform.dir_from_platform_in_workspace
feature-m0018pqt-144_run_test_suite
feature-m0018pqt-144_rework_testsuite_engine_doc
feature-m0018pqt-144_fix_broken_build_after_merge
feature-m0018pqt-144_document_test_suite_report
feature-m0018pqt-144_doc_microej_licenses_folder_for_pca
feature-m0018pqt-144_add_platform_qualification_page
feature-license_review
feature-known_issue_kf_basetype_arrays
feature-kf_wrong_reference
feature-js-limitation-doc
feature-j0190uil-837_debug
feature-j0190uil-1215_mwt_optimalsize
feature-j0190uil-1190_desktopanimator
feature-j0190uil-1144_partial_buffer
feature-import_offline_repo
feature-how-to-compute-optimal-size
feature-hide-a-widget
feature-header_fix
feature-gui-test-robot
feature-getting-started-docs
feature-fp_widgets
feature-fix_testsuite_duplicated_title
feature-fix_gui_tuto_with_verb
feature-fix_bullet_list
feature-event_propagation_diagram
feature-event-propagation
feature-esp32_toolchains_update
feature-enhance_java_api_keyword_search
feature-document_soar_error_25
feature-dbg_rtos_sched_review
feature-compute-optimal-size
feature-bounds-check-label
feature-badges
feature-add_issue_dongle_not_compatible
feature-add_icetea_executable_sections
feature-add_forum_in_support
feature-add_firmware_published_files
feature-add_development_tools_dependency_discoverer
document_build_module
bugfix-m0090ide-3495_remove_default_conf
bugfix-m0078ddg-372_ui2_snippets
bugfix-m0078ddg-290_add_mock_in_summary_table_fix_bullet_list
bugfix-m0018pqt-144_pull_up_testsuite_report_section_level
bugfix-m0018pqt-144_fix_remaining_legacy_ddg_launch_options
Downloads
pdf
On Read the Docs
Project Home
Builds
Free document hosting provided by Read the Docs.
  • docs Docs
  • Resources
  • Forum