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

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: "$buildDir/native-libs", include: 'native-libs.jar')
    implementation 'com.android.support:appcompat-v7:27.1.1'
    implementation 'com.android.support.constraint:constraint-layout:1.1.0'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.2'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
    implementation project(':openCVLibrary330')
}
//Add the fellow code
task nativeLibsToJar(type: Jar, description: 'create a jar archive of the native libs') {
    destinationDir file("$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)

<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.