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Android Barcode Generator

A simple Android barcode generation library and sample application that renders standard barcodes natively without using any external dependencies (like ZXing).

📌 Project Overview

This project demonstrates how to encode string data into standard barcode patterns and directly draw them onto an Android Bitmap utilizing Canvas and Paint. It implements the barcode rendering algorithms (bit encoding, checksum calculations, and pattern mappings) completely from scratch in Java.

Recently, the project has been updated to support the modern Gradle (Android Studio) build system, abandoning the legacy Eclipse/Ant project structure.

📦 Supported Barcode Formats

  • Code 128 (Code Set B): A high-density barcode capable of encoding the entire ASCII character set. Wiki
  • EAN-13 (International Article Number): A 13-digit standard barcode format primarily used for identifying commercial products worldwide. Wiki

✨ Key Features

  • Zero External Dependencies: Built purely with native Android/Java APIs for processing strings and drawing Bitmaps.
  • Modern Build System: Upgraded to use Android Gradle Plugin (AGP) and .kts (Kotlin DSL) build scripts.
  • Documented Algorithms: The core generation algorithms are thoroughly documented with standard English Javadoc to help developers easily grasp how patterns are mapped to bit buffers.
  • Ready to run: Includes an entry-point BarCodeActivity that provides a straightforward example of how to implement the model classes onto a target ImageView.

📂 Project Structure

android-barcode/
├── app/
│ ├── build.gradle.kts # App-level build configurations
│ └── src/main/
│ ├── AndroidManifest.xml
│ ├── java/com/coolbong/barcodegenerator/
│ │ ├── BarCodeActivity.java # Sample Entry Point
│ │ └── model/
│ │ ├── Code128.java # Code 128 Generator logic
│ │ ├── Code128Constant.java # Weight values for Code 128
│ │ ├── EAN13.java # EAN-13 Generator logic
│ │ └── EAN13Constant.java # Pattern values for EAN-13
│ └── res/ # Android UI layouts & resources
├── build.gradle.kts # Project-level build configuration
└── settings.gradle.kts # Gradle Settings

🚀 How to Build and Run

  1. Open Android Studio.
  2. Select File > Open... and navigate to this project's root folder (android-barcode).
  3. Allow Gradle to sync.
  4. Click Run 'app' to launch the sample app on an emulator or a physical Android device.

About

code128, EAN13 barcode generator

Resources

Readme
Activity

Stars

25 stars

Watchers

3 watching

Forks

10 forks
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try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '
GitHub - coolbong/android-barcode: code128, EAN13 barcode generator · GitHub
Skip to content
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Android Barcode Generator
A simple Android barcode generation library and sample application that renders standard barcodes natively without using any external dependencies (like ZXing).
📌 Project Overview
This project demonstrates how to encode string data into standard barcode patterns and directly draw them onto an Android Bitmap utilizing Canvas and Paint. It implements the barcode rendering algorithms (bit encoding, checksum calculations, and pattern mappings) completely from scratch in Java.
Recently, the project has been updated to support the modern Gradle (Android Studio) build system, abandoning the legacy Eclipse/Ant project structure.
📦 Supported Barcode Formats
  • Code 128 (Code Set B): A high-density barcode capable of encoding the entire ASCII character set. Wiki
  • EAN-13 (International Article Number): A 13-digit standard barcode format primarily used for identifying commercial products worldwide. Wiki
✨ Key Features
  • Zero External Dependencies: Built purely with native Android/Java APIs for processing strings and drawing Bitmaps.
  • Modern Build System: Upgraded to use Android Gradle Plugin (AGP) and .kts (Kotlin DSL) build scripts.
  • Documented Algorithms: The core generation algorithms are thoroughly documented with standard English Javadoc to help developers easily grasp how patterns are mapped to bit buffers.
  • Ready to run: Includes an entry-point BarCodeActivity that provides a straightforward example of how to implement the model classes onto a target ImageView.
📂 Project Structure
android-barcode/
├── app/
│ ├── build.gradle.kts # App-level build configurations
│ └── src/main/
│ ├── AndroidManifest.xml
│ ├── java/com/coolbong/barcodegenerator/
│ │ ├── BarCodeActivity.java # Sample Entry Point
│ │ └── model/
│ │ ├── Code128.java # Code 128 Generator logic
│ │ ├── Code128Constant.java # Weight values for Code 128
│ │ ├── EAN13.java # EAN-13 Generator logic
│ │ └── EAN13Constant.java # Pattern values for EAN-13
│ └── res/ # Android UI layouts & resources
├── build.gradle.kts # Project-level build configuration
└── settings.gradle.kts # Gradle Settings

🚀 How to Build and Run
  1. Open Android Studio.
  2. Select File > Open... and navigate to this project's root folder (android-barcode).
  3. Allow Gradle to sync.
  4. Click Run 'app' to launch the sample app on an emulator or a physical Android device.
About
code128, EAN13 barcode generator
Resources
Readme
Activity
Stars
25 stars
Watchers
3 watching
Forks
10 forks
Report repository
Releases
Packages
Contributors
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, 'i');
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})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
GitHub - coolbong/android-barcode: code128, EAN13 barcode generator · GitHub
Skip to content
BranchesTags
Repository files navigation
Android Barcode Generator
A simple Android barcode generation library and sample application that renders standard barcodes natively without using any external dependencies (like ZXing).
📌 Project Overview
This project demonstrates how to encode string data into standard barcode patterns and directly draw them onto an Android Bitmap utilizing Canvas and Paint. It implements the barcode rendering algorithms (bit encoding, checksum calculations, and pattern mappings) completely from scratch in Java.
Recently, the project has been updated to support the modern Gradle (Android Studio) build system, abandoning the legacy Eclipse/Ant project structure.
📦 Supported Barcode Formats
  • Code 128 (Code Set B): A high-density barcode capable of encoding the entire ASCII character set. Wiki
  • EAN-13 (International Article Number): A 13-digit standard barcode format primarily used for identifying commercial products worldwide. Wiki
✨ Key Features
  • Zero External Dependencies: Built purely with native Android/Java APIs for processing strings and drawing Bitmaps.
  • Modern Build System: Upgraded to use Android Gradle Plugin (AGP) and .kts (Kotlin DSL) build scripts.
  • Documented Algorithms: The core generation algorithms are thoroughly documented with standard English Javadoc to help developers easily grasp how patterns are mapped to bit buffers.
  • Ready to run: Includes an entry-point BarCodeActivity that provides a straightforward example of how to implement the model classes onto a target ImageView.
📂 Project Structure
android-barcode/
├── app/
│ ├── build.gradle.kts # App-level build configurations
│ └── src/main/
│ ├── AndroidManifest.xml
│ ├── java/com/coolbong/barcodegenerator/
│ │ ├── BarCodeActivity.java # Sample Entry Point
│ │ └── model/
│ │ ├── Code128.java # Code 128 Generator logic
│ │ ├── Code128Constant.java # Weight values for Code 128
│ │ ├── EAN13.java # EAN-13 Generator logic
│ │ └── EAN13Constant.java # Pattern values for EAN-13
│ └── res/ # Android UI layouts & resources
├── build.gradle.kts # Project-level build configuration
└── settings.gradle.kts # Gradle Settings

🚀 How to Build and Run
  1. Open Android Studio.
  2. Select File > Open... and navigate to this project's root folder (android-barcode).
  3. Allow Gradle to sync.
  4. Click Run 'app' to launch the sample app on an emulator or a physical Android device.
About
code128, EAN13 barcode generator
Resources
Readme
Activity
Stars
25 stars
Watchers
3 watching
Forks
10 forks
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Highlight search terms from Google/DuckDuckGo/Bing referrer
(function() {
var ref = document.referrer;
var terms = [];
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terms = q.split(/\s+/).filter(function(t) { return t.length > 2; });
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if (terms.length === 0) return;
var style = document.createElement('style');
style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';
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var text = node.textContent;
var found = false;
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found = true;
var frag = document.createDocumentFragment();
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parts.forEach(function(part, i) {
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frag.appendChild(document.createTextNode(part));
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span.className = 'userscript-highlight';
span.textContent = part;
frag.appendChild(span);
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node.parentNode.replaceChild(frag, node);
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var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];
if (!skipTags.includes(node.tagName)) {
Array.from(node.childNodes).forEach(highlight);
}
}
}
highlight(document.body);
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mutations.forEach(function(m) {
m.addedNodes.forEach(function(node) {
if (node.nodeType === 1 || node.nodeType === 3) highlight(node);
});
});
});
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
GitHub - coolbong/android-barcode: code128, EAN13 barcode generator · GitHub
Skip to content
BranchesTags
Repository files navigation
Android Barcode Generator
A simple Android barcode generation library and sample application that renders standard barcodes natively without using any external dependencies (like ZXing).
📌 Project Overview
This project demonstrates how to encode string data into standard barcode patterns and directly draw them onto an Android Bitmap utilizing Canvas and Paint. It implements the barcode rendering algorithms (bit encoding, checksum calculations, and pattern mappings) completely from scratch in Java.
Recently, the project has been updated to support the modern Gradle (Android Studio) build system, abandoning the legacy Eclipse/Ant project structure.
📦 Supported Barcode Formats
  • Code 128 (Code Set B): A high-density barcode capable of encoding the entire ASCII character set. Wiki
  • EAN-13 (International Article Number): A 13-digit standard barcode format primarily used for identifying commercial products worldwide. Wiki
✨ Key Features
  • Zero External Dependencies: Built purely with native Android/Java APIs for processing strings and drawing Bitmaps.
  • Modern Build System: Upgraded to use Android Gradle Plugin (AGP) and .kts (Kotlin DSL) build scripts.
  • Documented Algorithms: The core generation algorithms are thoroughly documented with standard English Javadoc to help developers easily grasp how patterns are mapped to bit buffers.
  • Ready to run: Includes an entry-point BarCodeActivity that provides a straightforward example of how to implement the model classes onto a target ImageView.
📂 Project Structure
android-barcode/
├── app/
│ ├── build.gradle.kts # App-level build configurations
│ └── src/main/
│ ├── AndroidManifest.xml
│ ├── java/com/coolbong/barcodegenerator/
│ │ ├── BarCodeActivity.java # Sample Entry Point
│ │ └── model/
│ │ ├── Code128.java # Code 128 Generator logic
│ │ ├── Code128Constant.java # Weight values for Code 128
│ │ ├── EAN13.java # EAN-13 Generator logic
│ │ └── EAN13Constant.java # Pattern values for EAN-13
│ └── res/ # Android UI layouts & resources
├── build.gradle.kts # Project-level build configuration
└── settings.gradle.kts # Gradle Settings

🚀 How to Build and Run
  1. Open Android Studio.
  2. Select File > Open... and navigate to this project's root folder (android-barcode).
  3. Allow Gradle to sync.
  4. Click Run 'app' to launch the sample app on an emulator or a physical Android device.
About
code128, EAN13 barcode generator
Resources
Readme
Activity
Stars
25 stars
Watchers
3 watching
Forks
10 forks
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Strip utm_, fbclid, gclid, etc. from all links on page
(function() {
var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',
'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',
'ref', 'ref_src', 'source', 'medium', 'campaign'];
function cleanUrl(url) {
try {
var u = new URL(url, window.location.origin);
var changed = false;
trackingParams.forEach(function(p) {
if (u.searchParams.has(p)) {
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(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '
GitHub - coolbong/android-barcode: code128, EAN13 barcode generator · GitHub
Skip to content
BranchesTags
Repository files navigation
Android Barcode Generator
A simple Android barcode generation library and sample application that renders standard barcodes natively without using any external dependencies (like ZXing).
📌 Project Overview
This project demonstrates how to encode string data into standard barcode patterns and directly draw them onto an Android Bitmap utilizing Canvas and Paint. It implements the barcode rendering algorithms (bit encoding, checksum calculations, and pattern mappings) completely from scratch in Java.
Recently, the project has been updated to support the modern Gradle (Android Studio) build system, abandoning the legacy Eclipse/Ant project structure.
📦 Supported Barcode Formats
  • Code 128 (Code Set B): A high-density barcode capable of encoding the entire ASCII character set. Wiki
  • EAN-13 (International Article Number): A 13-digit standard barcode format primarily used for identifying commercial products worldwide. Wiki
✨ Key Features
  • Zero External Dependencies: Built purely with native Android/Java APIs for processing strings and drawing Bitmaps.
  • Modern Build System: Upgraded to use Android Gradle Plugin (AGP) and .kts (Kotlin DSL) build scripts.
  • Documented Algorithms: The core generation algorithms are thoroughly documented with standard English Javadoc to help developers easily grasp how patterns are mapped to bit buffers.
  • Ready to run: Includes an entry-point BarCodeActivity that provides a straightforward example of how to implement the model classes onto a target ImageView.
📂 Project Structure
android-barcode/
├── app/
│ ├── build.gradle.kts # App-level build configurations
│ └── src/main/
│ ├── AndroidManifest.xml
│ ├── java/com/coolbong/barcodegenerator/
│ │ ├── BarCodeActivity.java # Sample Entry Point
│ │ └── model/
│ │ ├── Code128.java # Code 128 Generator logic
│ │ ├── Code128Constant.java # Weight values for Code 128
│ │ ├── EAN13.java # EAN-13 Generator logic
│ │ └── EAN13Constant.java # Pattern values for EAN-13
│ └── res/ # Android UI layouts & resources
├── build.gradle.kts # Project-level build configuration
└── settings.gradle.kts # Gradle Settings

🚀 How to Build and Run
  1. Open Android Studio.
  2. Select File > Open... and navigate to this project's root folder (android-barcode).
  3. Allow Gradle to sync.
  4. Click Run 'app' to launch the sample app on an emulator or a physical Android device.
About
code128, EAN13 barcode generator
Resources
Readme
Activity
Stars
25 stars
Watchers
3 watching
Forks
10 forks
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Auto-enable theater mode on YouTube
(function() {
function tryTheater() {
var btn = document.querySelector('button[aria-label="Theater mode"], ytd-player #player button[title="Theater mode"]');
if (btn && !btn.classList.contains('activated')) {
btn.click();
}
}
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tryTheater();
// Try after navigation (SPA)
var lastUrl = location.href;
setInterval(function() {
if (location.href !== lastUrl) {
lastUrl = location.href;
setTimeout(tryTheater, 500);
}
}, 1000);
// Also try on player load
var observer = new MutationObserver(tryTheater);
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
GitHub - coolbong/android-barcode: code128, EAN13 barcode generator · GitHub
Skip to content
BranchesTags
Repository files navigation
Android Barcode Generator
A simple Android barcode generation library and sample application that renders standard barcodes natively without using any external dependencies (like ZXing).
📌 Project Overview
This project demonstrates how to encode string data into standard barcode patterns and directly draw them onto an Android Bitmap utilizing Canvas and Paint. It implements the barcode rendering algorithms (bit encoding, checksum calculations, and pattern mappings) completely from scratch in Java.
Recently, the project has been updated to support the modern Gradle (Android Studio) build system, abandoning the legacy Eclipse/Ant project structure.
📦 Supported Barcode Formats
  • Code 128 (Code Set B): A high-density barcode capable of encoding the entire ASCII character set. Wiki
  • EAN-13 (International Article Number): A 13-digit standard barcode format primarily used for identifying commercial products worldwide. Wiki
✨ Key Features
  • Zero External Dependencies: Built purely with native Android/Java APIs for processing strings and drawing Bitmaps.
  • Modern Build System: Upgraded to use Android Gradle Plugin (AGP) and .kts (Kotlin DSL) build scripts.
  • Documented Algorithms: The core generation algorithms are thoroughly documented with standard English Javadoc to help developers easily grasp how patterns are mapped to bit buffers.
  • Ready to run: Includes an entry-point BarCodeActivity that provides a straightforward example of how to implement the model classes onto a target ImageView.
📂 Project Structure
android-barcode/
├── app/
│ ├── build.gradle.kts # App-level build configurations
│ └── src/main/
│ ├── AndroidManifest.xml
│ ├── java/com/coolbong/barcodegenerator/
│ │ ├── BarCodeActivity.java # Sample Entry Point
│ │ └── model/
│ │ ├── Code128.java # Code 128 Generator logic
│ │ ├── Code128Constant.java # Weight values for Code 128
│ │ ├── EAN13.java # EAN-13 Generator logic
│ │ └── EAN13Constant.java # Pattern values for EAN-13
│ └── res/ # Android UI layouts & resources
├── build.gradle.kts # Project-level build configuration
└── settings.gradle.kts # Gradle Settings

🚀 How to Build and Run
  1. Open Android Studio.
  2. Select File > Open... and navigate to this project's root folder (android-barcode).
  3. Allow Gradle to sync.
  4. Click Run 'app' to launch the sample app on an emulator or a physical Android device.
About
code128, EAN13 barcode generator
Resources
Readme
Activity
Stars
25 stars
Watchers
3 watching
Forks
10 forks
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Remove or un-stick sticky/fixed headers that block content
(function() {
function unstick() {
document.querySelectorAll('header, nav, [role="banner"], .header, .navbar, .sticky, .fixed-top, [style*="position: fixed"], [style*="position:sticky"]').forEach(function(el) {
if (el.style.position === 'fixed' || el.style.position === 'sticky' || getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {
el.style.position = 'static';
el.style.top = 'auto';
el.style.zIndex = 'auto';
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var observer = new MutationObserver(unstick);
observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });
})();
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
})();
GitHub - coolbong/android-barcode: code128, EAN13 barcode generator · GitHub
Skip to content
BranchesTags
Repository files navigation
Android Barcode Generator
A simple Android barcode generation library and sample application that renders standard barcodes natively without using any external dependencies (like ZXing).
📌 Project Overview
This project demonstrates how to encode string data into standard barcode patterns and directly draw them onto an Android Bitmap utilizing Canvas and Paint. It implements the barcode rendering algorithms (bit encoding, checksum calculations, and pattern mappings) completely from scratch in Java.
Recently, the project has been updated to support the modern Gradle (Android Studio) build system, abandoning the legacy Eclipse/Ant project structure.
📦 Supported Barcode Formats
  • Code 128 (Code Set B): A high-density barcode capable of encoding the entire ASCII character set. Wiki
  • EAN-13 (International Article Number): A 13-digit standard barcode format primarily used for identifying commercial products worldwide. Wiki
✨ Key Features
  • Zero External Dependencies: Built purely with native Android/Java APIs for processing strings and drawing Bitmaps.
  • Modern Build System: Upgraded to use Android Gradle Plugin (AGP) and .kts (Kotlin DSL) build scripts.
  • Documented Algorithms: The core generation algorithms are thoroughly documented with standard English Javadoc to help developers easily grasp how patterns are mapped to bit buffers.
  • Ready to run: Includes an entry-point BarCodeActivity that provides a straightforward example of how to implement the model classes onto a target ImageView.
📂 Project Structure
android-barcode/
├── app/
│ ├── build.gradle.kts # App-level build configurations
│ └── src/main/
│ ├── AndroidManifest.xml
│ ├── java/com/coolbong/barcodegenerator/
│ │ ├── BarCodeActivity.java # Sample Entry Point
│ │ └── model/
│ │ ├── Code128.java # Code 128 Generator logic
│ │ ├── Code128Constant.java # Weight values for Code 128
│ │ ├── EAN13.java # EAN-13 Generator logic
│ │ └── EAN13Constant.java # Pattern values for EAN-13
│ └── res/ # Android UI layouts & resources
├── build.gradle.kts # Project-level build configuration
└── settings.gradle.kts # Gradle Settings

🚀 How to Build and Run
  1. Open Android Studio.
  2. Select File > Open... and navigate to this project's root folder (android-barcode).
  3. Allow Gradle to sync.
  4. Click Run 'app' to launch the sample app on an emulator or a physical Android device.
About
code128, EAN13 barcode generator
Resources
Readme
Activity
Stars
25 stars
Watchers
3 watching
Forks
10 forks
Report repository
Releases
Packages
Contributors
Languages