---
lang: ja-jp
breaks: true
---
# Android 内蔵カメラを使ったバーコードの読込 `CameraX` `ML Kit` 2021-08-05

> googlesamples/android-vision
> https://github.com/googlesamples/android-vision

> CameraXとML KitでQRコード・バーコードリーダーを作る
> https://qiita.com/ryo_mm2d/items/982809ab940dc9549fba

> Scan Barcodes with ML Kit on Android
> https://developers.google.com/ml-kit/vision/barcode-scanning/android

> mlkit/android/material-showcase/
> https://github.com/googlesamples/mlkit/tree/master/android/material-showcase

> mlkit/android/vision-quickstart/
> https://github.com/googlesamples/mlkit/tree/master/android/vision-quickstart

> CameraX の概要
> https://developer.android.com/training/camerax?hl=ja

> android/camera-samples
> https://github.com/android/camera-samples/tree/main/CameraXBasic

## /app/build.gradle

モデルをアプリにバンドルする設定

dependencies {
    // ...
    // Use this dependency to bundle the model with your app
    // Barcode model
    implementation 'com.google.mlkit:barcode-scanning:16.2.0'
    // Or comment the dependency above and uncomment the dependency below to
    // use unbundled model that depends on Google Play Services
    // implementation 'com.google.android.gms:play-services-mlkit-barcode-scanning:16.2.0'

    // Object detection feature with bundled default classifier
    implementation 'com.google.mlkit:object-detection:16.2.6'

    // Object detection feature with custom classifier support
    implementation 'com.google.mlkit:object-detection-custom:16.3.3'

    // Face features
    implementation 'com.google.mlkit:face-detection:16.1.2'
    // Or comment the dependency above and uncomment the dependency below to
    // use unbundled model that depends on Google Play Services
    // implementation 'com.google.android.gms:play-services-mlkit-face-detection:16.2.0'

    // Text features
    implementation 'com.google.android.gms:play-services-mlkit-text-recognition:16.3.0'

    // Image labeling
    implementation 'com.google.mlkit:image-labeling:17.0.5'
    // Or comment the dependency above and uncomment the dependency below to
    // use unbundled model that depends on Google Play Services
    // implementation 'com.google.android.gms:play-services-mlkit-image-labeling:16.0.5'

    // Image labeling custom
    implementation 'com.google.mlkit:image-labeling-custom:16.3.1'

    // Pose detection with default models
    implementation 'com.google.mlkit:pose-detection:17.0.1-beta4'
    // Pose detection with accurate models
    implementation 'com.google.mlkit:pose-detection-accurate:17.0.1-beta4'

    // Selfie segmentation
    implementation 'com.google.mlkit:segmentation-selfie:16.0.0-beta2'

    implementation 'com.google.mlkit:camera:16.0.0-beta1'
}

## gradle.properties

## src/main/AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
・・・
    android:installLocation="auto">
    
    <!-- CameraX libraries require minSdkVersion 21, while this quickstart app
    supports low to 16. Needs to use overrideLibrary to make the merger tool
    ignore this conflict and import the libraries while keeping the app's lower
    minSdkVersion value. In code, will check SDK version, before calling CameraX
    APIs. -->
    <uses-sdk
        tools:overrideLibrary="
          androidx.camera.camera2, androidx.camera.core,
          androidx.camera.view, androidx.camera.lifecycle" />

    <uses-feature android:name="android.hardware.camera"/>

    <uses-permission android:name="android.permission.INTERNET"/>
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
    <uses-permission android:name="android.permission.CAMERA"/>

    <application
・・・
        >

        <meta-data
            android:name="com.google.android.gms.version"
            android:value="@integer/google_play_services_version"/>

        <!-- Optional: Add it to automatically download ML model to device after
          your app is installed.-->
        <meta-data
            android:name="com.google.mlkit.vision.DEPENDENCIES"
            android:value="barcode,face,ocr,ica"/>
・・・
        <activity
・・・
        </activity>

    </application>

<queries>
        <intent>
            <action android:name="android.media.action.IMAGE_CAPTURE" />
        </intent>
    </queries>

</manifest>

## gradle.properties

# Project-wide Gradle settings.
# IDE (e.g. Android Studio) users:
# Gradle settings configured through the IDE *will override*
# any settings specified in this file.
# For more details on how to configure your build environment visit
# http://www.gradle.org/docs/current/userguide/build_environment.html
# Specifies the JVM arguments used for the daemon process.
# The setting is particularly useful for tweaking memory settings.
org.gradle.jvmargs=-Xmx4096m -XX:MaxPermSize=1024m -XX:+HeapDumpOnOutOfMemoryError -Dfile.encoding=UTF-8

# Uses one worker to build. This helps resolve build OOM issue.
org.gradle.workers.max=1

# When configured, Gradle will run in incubating parallel mode.
# This option should only be used with decoupled projects. More details, visit
# http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
# org.gradle.parallel=true
# AndroidX package structure to make it clearer which packages are bundled with the
# Android operating system, and which are packaged with your app's APK
# https://developer.android.com/topic/libraries/support-library/androidx-rn
android.useAndroidX=true
# Automatically convert third-party libraries to use AndroidX
android.enableJetifier=true

###### tags: `Android` `内蔵カメラ` `バーコード` `CameraX` `ML Kit`