From:https://blog.csdn.net/lldbuaa/article/details/80333718

I must be crazy!

when I promise someone that I will finish an app with Opencv&ZXing in 2 weeks ,I didnot know what an activity is!

cause I got a lot from web,many people gave advice for other people and I got something right and something wrong…

So If this blog help you,I will be happy and give me five.

1.OpenCV Environment WITHOUT OPENCV_Manager

this link
Opencv4Android doc
Opencv4Android Environment doc

Cause I use Android Studio so I fellow the steps below

(1).Import Module->”opencv/sdk/java”->then get the model like this

(2).Add depends->

There, I need to say,when I use Opencv in ZXing(Modify),I will add the depends to ZXing Module,and you will read more.

(3).Modify the build.gradle(openCVLibrary330)& (app)->

//build gradle(opencv)apply plugin: 'com.android.library'android {    compileSdkVersion 27         //Need to Modify    buildToolsVersion "27.0.3"   //Need to Modify    //The actual version depends on your build.gradle(app) fellowed    defaultConfig {        minSdkVersion 23        //Need to Modify        targetSdkVersion 27     //Need to Modify        //Same with the app build.gradle(app)    }    buildTypes {        release {            minifyEnabled false            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'        }    }}

//build.gradle(app)apply plugin: 'com.android.application'android {    compileSdkVersion 27    buildToolsVersion "27.0.3"    defaultConfig {        applicationId "com.example.lld.hellowopencv"        minSdkVersion 23        targetSdkVersion 27        versionCode 1        versionName "1.1"        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"    }    buildTypes {        release {            minifyEnabled false            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'        }    }}dependencies {    implementation fileTree(include: ['*.jar'], dir: 'libs')    implementation fileTree(dir: "$buildDir/native-libs", include: 'native-libs.jar')    implementation 'com.android.support:appcompat-v7:27.1.1'    implementation 'com.android.support.constraint:constraint-layout:1.1.0'    testImplementation 'junit:junit:4.12'    androidTestImplementation 'com.android.support.test:runner:1.0.2'    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'    implementation project(':openCVLibrary330')}//Add the fellow codetask nativeLibsToJar(type: Jar, description: 'create a jar archive of the native libs') {    destinationDir file("$buildDir/native-libs")  //native-libs is the neme of jar    baseName 'native-libs'                        //same with the up    from fileTree(dir: 'libs', include: '**/*.so')    into 'lib/'}tasks.withType(JavaCompile) {    compileTask -> compileTask.dependsOn(nativeLibsToJar)}

(4).Copy opencv/sdk/native 2 libs(IF you do not have JNI)

(IF you have JNI) read the link as fellow

Opencv4Android Environment doc

(5).Init OpenCV static

static {    if (!OpenCVLoader.initDebug()) {        // Handle initialization error    } else {        System.loadLibrary("my_jni_lib1");        System.loadLibrary("my_jni_lib2");    }}

Maybe you will find No Wrong with your code.
When your Module which depends OpenCV is the app,It will work,you will GET the OpenCV Load like this:

But when your Module which depends OpenCV is the other app, it will not work,and you will GET Cannot load Opencv/Opencv Info/…
You need
create the jniLibs folder and copy opencv/sdk/native to the folder

you will get

It means you get the OpenCV environment.

2.ZXing Environment

(1)New Module ->ZXing

(2)Copy files into ZXing/src/main/java/com/

like the fellowing

and modify the res folder

(3)Add depends to App Module

(4)Cover the Mainfiest(app)

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="com.lld.checkapp">    <uses-permission android:name="android.permission.CAMERA"/>    <uses-permission android:name="android.permission.FLASHLIGHT"/>    <uses-feature android:name="android.hardware.camera"/>    <uses-feature android:name="android.hardware.camera.autofocus"/>    <uses-permission android:name="android.permission.VIBRATE"/>    <uses-permission android:name="android.permission.WAKE_LOCK"/>    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>    <application        android:allowBackup="true"        android:icon="@mipmap/ic_launcher"        android:label="@string/app_name"        android:roundIcon="@mipmap/ic_launcher_round"        android:supportsRtl="true"        android:theme="@style/AppTheme">        <activity            android:name=".main"            android:configChanges="orientation|keyboardHidden|screenSize"            android:label="@string/app_name"            android:theme="@style/Theme.AppCompat.Light.NoActionBar">            <intent-filter>                <action android:name="android.intent.action.MAIN" />                <category android:name="android.intent.category.LAUNCHER" />            intent-filter>        activity>        <activity android:name="com.lld.zxing.Activity.CaptureActivity">//register the next Activity        activity>    application>manifest>

(5).Add core-3.3.0.jar to zxing/libs/

(6).You Get the ZXing environment (Modify for scan QR code)

3.The Test Pic

4.The download link

OpenCV Environment Only密码: uncv
ZXing Environment Only 密码cn5a
Two Environment in One 密码bdhm

5.If the blog helps you,please make something for others

Maybe Give Me Five is a Good Thing.

Opencv(3.3) & ZXing(Modify for scan QR code) for Android(安卓)environment on Android(安卓)Studio