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Merge pull request #108 from Dynamsoft/_dev
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‎1.hello-world/14.read-video-webview/android/.gitignore‎

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*.iml
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.gradle
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/local.properties
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/.idea/caches
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/.idea/libraries
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/.idea/modules.xml
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/.idea/workspace.xml
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/.idea/navEditor.xml
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/.idea/assetWizardSettings.xml
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.DS_Store
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/build
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/captures
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.externalNativeBuild
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.cxx
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local.properties

‎1.hello-world/14.read-video-webview/android/RADME.md‎

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# Hello-world for Android WebView - Dynamsoft Barcode Reader Sample
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This sample demonstrates how to use the [Dynamsoft Barcode Reader](https://www.dynamsoft.com/barcode-reader/overview/) JS Edition in Android.
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If you want to learn how to use the Android Edition SDK in javascript, you can check [Android WebView Barcode Scanning](https://github.com/Dynamsoft/barcode-reader-mobile-samples/tree/main/android/JavaScript/WebViewBarcodeScanning).

‎1.hello-world/14.read-video-webview/android/app/.gitignore‎

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/build

‎1.hello-world/14.read-video-webview/android/app/build.gradle‎

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plugins {
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id 'com.android.application'
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id 'org.jetbrains.kotlin.android'
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}
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android {
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namespace 'com.dynamsoft.dbrjswebview'
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compileSdk 33
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defaultConfig {
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applicationId "com.dynamsoft.dbrjswebview"
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minSdk 19
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targetSdk 33
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versionCode 1
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versionName "1.0"
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testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
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}
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buildTypes {
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release {
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minifyEnabled false
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proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
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}
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}
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compileOptions {
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sourceCompatibility JavaVersion.VERSION_1_8
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targetCompatibility JavaVersion.VERSION_1_8
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}
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kotlinOptions {
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jvmTarget = '1.8'
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}
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}
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dependencies {
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implementation 'androidx.core:core-ktx:1.7.0'
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implementation 'androidx.appcompat:appcompat:1.4.1'
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implementation 'com.google.android.material:material:1.5.0'
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implementation 'androidx.constraintlayout:constraintlayout:2.1.3'
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implementation 'androidx.webkit:webkit:1.4.0'
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testImplementation 'junit:junit:4.13.2'
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androidTestImplementation 'androidx.test.ext:junit:1.1.3'
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androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
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}

‎1.hello-world/14.read-video-webview/android/app/proguard-rules.pro‎

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# Add project specific ProGuard rules here.
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# You can control the set of applied configuration files using the
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# proguardFiles setting in build.gradle.
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#
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# For more details, see
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# http://developer.android.com/guide/developing/tools/proguard.html
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# If your project uses WebView with JS, uncomment the following
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# and specify the fully qualified class name to the JavaScript interface
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# class:
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#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
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# public *;
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#}
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# Uncomment this to preserve the line number information for
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# debugging stack traces.
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#-keepattributes SourceFile,LineNumberTable
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# If you keep the line number information, uncomment this to
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# hide the original source file name.
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#-renamesourcefileattribute SourceFile

‎1.hello-world/14.read-video-webview/android/app/src/main/AndroidManifest.xml‎

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<?xml version="1.0" encoding="utf-8"?>
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<manifest xmlns:android="http://schemas.android.com/apk/res/android"
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xmlns:tools="http://schemas.android.com/tools">
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<uses-permission android:name="android.permission.INTERNET" />
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<uses-permission android:name="android.permission.CAMERA" />
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<application
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android:allowBackup="true"
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android:dataExtractionRules="@xml/data_extraction_rules"
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android:fullBackupContent="@xml/backup_rules"
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android:icon="@mipmap/ic_launcher"
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android:label="@string/app_name"
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android:supportsRtl="true"
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android:theme="@style/Theme.DynamsoftBarcode"
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tools:targetApi="31">
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<activity
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android:name=".MainActivity"
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android:exported="true">
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<intent-filter>
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<action android:name="android.intent.action.MAIN" />
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<category android:name="android.intent.category.LAUNCHER" />
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</intent-filter>
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</activity>
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</application>
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</manifest>

‎1.hello-world/14.read-video-webview/android/app/src/main/assets/decodeBarcodeInVideo.html‎

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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width,initial-scale=1.0,user-scalable=no"">
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<meta name="description" content="Quickly read barcodes with Dynamsoft Barcode Reader from a live camera stream.">
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<meta name="keywords" content="camera based barcode reading">
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<link rel="canonical" href="https://demo.dynamsoft.com/Samples/DBR/JS/1.hello-world/1.hello-world.html">
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<title>Dynamsoft Barcode Reader Sample - Hello World (Decoding via Camera)</title>
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</head>
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<body>
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Loading...
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<script src="https://cdn.jsdelivr.net/npm/dynamsoft-javascript-barcode@9.6.20/dist/dbr.js"></script>
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<script>
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/** LICENSE ALERT - README
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* To use the library, you need to first specify a license key using the API "license" as shown below.
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*/
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Dynamsoft.DBR.BarcodeReader.license = 'DLS2eyJvcmdhbml6YXRpb25JRCI6IjIwMDAwMSJ9';
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/**
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* You can visit https://www.dynamsoft.com/customer/license/trialLicense?utm_source=github&product=dbr&package=js to get your own trial license good for 30 days.
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* Note that if you downloaded this sample from Dynamsoft while logged in, the above license key may already be your own 30-day trial license.
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* For more information, see https://www.dynamsoft.com/barcode-reader/programming/javascript/user-guide/?ver=9.6.20&utm_source=github#specify-the-license or contact support@dynamsoft.com.
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* LICENSE ALERT - THE END
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*/
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(async function() {
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try {
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const scanner = await Dynamsoft.DBR.BarcodeScanner.createInstance();
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/**
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* 'onFrameRead' is triggered after the library finishes reading a frame image.
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* There can be multiple barcodes on one image.
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*/
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scanner.onFrameRead = results => {
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console.log("Barcodes on one frame:");
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for (let result of results) {
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const format = result.barcodeFormatString;
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console.log(format + ": " + result.barcodeText);
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}
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};
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/**
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* 'onUniqueRead' is triggered only when a 'new' barcode is found.
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* The amount of time that the library 'remembers' a barcode is defined by
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* "duplicateForgetTime" in "ScanSettings". By default it is set to 3000 ms.
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*/
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scanner.onUniqueRead = (txt, result) => {
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alert(txt);
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console.log("Unique Code Found: ", result);
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}
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/**
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* 'show()' opens the camera and shows the video stream on the page.
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* After that, the library starts to scan the frame images continuously.
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*/
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await scanner.show();
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} catch (ex) {
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let errMsg;
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if (ex.message.includes("network connection error")) {
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errMsg = "Failed to connect to Dynamsoft License Server: network connection error. Check your Internet connection or contact Dynamsoft Support (support@dynamsoft.com) to acquire an offline license.";
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} else {
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errMsg = ex.message||ex;
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}
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console.error(errMsg);
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alert(errMsg);
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}
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})();
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</script>
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</body>
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</html>

‎1.hello-world/14.read-video-webview/android/app/src/main/java/com/dynamsoft/dbrjswebview/MainActivity.kt‎

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package com.dynamsoft.dbrjswebview
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import android.Manifest
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import android.annotation.SuppressLint
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import android.content.pm.PackageManager
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import android.net.Uri
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import androidx.appcompat.app.AppCompatActivity
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import android.os.Bundle
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import android.webkit.*
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import androidx.activity.result.contract.ActivityResultContracts
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import androidx.annotation.RequiresApi
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import androidx.core.content.ContextCompat
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import androidx.webkit.WebViewAssetLoader
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import androidx.webkit.WebViewClientCompat
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class MainActivity : AppCompatActivity() {
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@SuppressLint("SetJavaScriptEnabled")
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override fun onCreate(savedInstanceState: Bundle?) {
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super.onCreate(savedInstanceState)
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setContentView(R.layout.activity_main)
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val myWebView: WebView = findViewById(R.id.webview)
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myWebView.settings.javaScriptEnabled = true
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myWebView.settings.mediaPlaybackRequiresUserGesture = false
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myWebView.settings.domStorageEnabled = true
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myWebView.webViewClient = MyWebViewClient()
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myWebView.webChromeClient = MyWebChromeClient()
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myWebView.loadUrl("https://appassets.androidplatform.net/assets/decodeBarcodeInVideo.html")
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}
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// Warning: If you use online url, you don't need `LocalContentWebViewClient`
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// Refer: https://developer.android.com/develop/ui/views/layout/webapps/load-local-content?hl=en
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private inner class MyWebViewClient : WebViewClientCompat() {
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private val assetLoader = WebViewAssetLoader.Builder()
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.addPathHandler("/assets/", WebViewAssetLoader.AssetsPathHandler(this@MainActivity))
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.build()
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@RequiresApi(21)
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override fun shouldInterceptRequest(
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view: WebView,
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request: WebResourceRequest
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): WebResourceResponse? {
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return assetLoader.shouldInterceptRequest(request.url)
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}
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// to support API < 21
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@Deprecated("Deprecated in Java")
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override fun shouldInterceptRequest(
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view: WebView,
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url: String
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): WebResourceResponse? {
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return assetLoader.shouldInterceptRequest(Uri.parse(url))
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}
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}
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var cameraPermissionReq: PermissionRequest? = null
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private inner class MyWebChromeClient : WebChromeClient() {
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@RequiresApi(21)
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override fun onPermissionRequest(request: PermissionRequest) {
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if(request.resources.contains(PermissionRequest.RESOURCE_VIDEO_CAPTURE)){
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// Refer: https://developer.android.com/training/permissions/requesting
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if(ContextCompat.checkSelfPermission(
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this@MainActivity,
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Manifest.permission.CAMERA
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) == PackageManager.PERMISSION_GRANTED){
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// You can use the API that requires the permission.
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request.grant(arrayOf(PermissionRequest.RESOURCE_VIDEO_CAPTURE))
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}else{
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// You can directly ask for the permission.
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// The registered ActivityResultCallback gets the result of this request.
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this@MainActivity.cameraPermissionReq = request
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requestCameraPermissionLauncher.launch(Manifest.permission.CAMERA)
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}
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}else{
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request.deny()
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}
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}
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}
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// Refer: https://developer.android.com/training/permissions/requesting
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@RequiresApi(21)
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val requestCameraPermissionLauncher = registerForActivityResult(
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ActivityResultContracts.RequestPermission()
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) { isGranted: Boolean ->
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// Refer: https://www.dynamsoft.com/codepool/use-barcode-scanner-in-android-webview.html#set-up-webview
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this@MainActivity.runOnUiThread {
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if (isGranted) {
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// Permission is granted. Continue the action or workflow in your
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// app.
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cameraPermissionReq?.grant(arrayOf(PermissionRequest.RESOURCE_VIDEO_CAPTURE))
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} else {
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// Explain to the user that the feature is unavailable because the
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// feature requires a permission that the user has denied. At the
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// same time, respect the user's decision. Don't link to system
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// settings in an effort to convince the user to change their
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// decision.
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cameraPermissionReq?.deny()
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}
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cameraPermissionReq = null
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}
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}
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}

‎1.hello-world/14.read-video-webview/android/app/src/main/res/drawable-v24/ic_launcher_foreground.xml‎

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<vector xmlns:android="http://schemas.android.com/apk/res/android"
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xmlns:aapt="http://schemas.android.com/aapt"
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android:width="108dp"
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android:height="108dp"
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android:viewportWidth="108"
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android:viewportHeight="108">
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<path android:pathData="M31,63.928c0,0 6.4,-11 12.1,-13.1c7.2,-2.6 26,-1.4 26,-1.4l38.1,38.1L107,108.928l-32,-1L31,63.928z">
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<aapt:attr name="android:fillColor">
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<gradient
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android:endX="85.84757"
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android:endY="92.4963"
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android:startX="42.9492"
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android:startY="49.59793"
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android:type="linear">
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<item
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android:color="#44000000"
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android:offset="0.0" />
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<item
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android:color="#00000000"
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android:offset="1.0" />
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</gradient>
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</aapt:attr>
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</path>
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<path
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android:fillColor="#FFFFFF"
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android:fillType="nonZero"
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android:pathData="M65.3,45.828l3.8,-6.6c0.2,-0.4 0.1,-0.9 -0.3,-1.1c-0.4,-0.2 -0.9,-0.1 -1.1,0.3l-3.9,6.7c-6.3,-2.8 -13.4,-2.8 -19.7,0l-3.9,-6.7c-0.2,-0.4 -0.7,-0.5 -1.1,-0.3C38.8,38.328 38.7,38.828 38.9,39.228l3.8,6.6C36.2,49.428 31.7,56.028 31,63.928h46C76.3,56.028 71.8,49.428 65.3,45.828zM43.4,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2c-0.3,-0.7 -0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C45.3,56.528 44.5,57.328 43.4,57.328L43.4,57.328zM64.6,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2s-0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C66.5,56.528 65.6,57.328 64.6,57.328L64.6,57.328z"
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android:strokeWidth="1"
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android:strokeColor="#00000000" />
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</vector>

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