o.1

.gitignore

@@ -0,0 +1,15 @@
+*.iml
+.gradle
+/local.properties
+/.idea/caches
+/.idea/libraries
+/.idea/modules.xml
+/.idea/workspace.xml
+/.idea/navEditor.xml
+/.idea/assetWizardSettings.xml
+.DS_Store
+/build
+/captures
+.externalNativeBuild
+.cxx
+local.properties

.idea/.gitignore

@@ -0,0 +1,3 @@
+# Default ignored files
+/shelf/
+/workspace.xml

.idea/compiler.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="CompilerConfiguration">
+    <bytecodeTargetLevel target="11" />
+  </component>
+</project>

.idea/gradle.xml

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="GradleMigrationSettings" migrationVersion="1" />
+  <component name="GradleSettings">
+    <option name="linkedExternalProjectsSettings">
+      <GradleProjectSettings>
+        <option name="testRunner" value="PLATFORM" />
+        <option name="distributionType" value="DEFAULT_WRAPPED" />
+        <option name="externalProjectPath" value="$PROJECT_DIR$" />
+        <option name="gradleHome" value="$PROJECT_DIR$/../../sdk/gradle/gradle-6.7.1" />
+        <option name="modules">
+          <set>
+            <option value="$PROJECT_DIR$" />
+            <option value="$PROJECT_DIR$/app" />
+          </set>
+        </option>
+        <option name="resolveModulePerSourceSet" value="false" />
+      </GradleProjectSettings>
+    </option>
+  </component>
+</project>

.idea/jarRepositories.xml

@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="RemoteRepositoriesConfiguration">
+    <remote-repository>
+      <option name="id" value="central" />
+      <option name="name" value="Maven Central repository" />
+      <option name="url" value="https://repo1.maven.org/maven2" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="jboss.community" />
+      <option name="name" value="JBoss Community repository" />
+      <option name="url" value="https://repository.jboss.org/nexus/content/repositories/public/" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="MavenRepo" />
+      <option name="name" value="MavenRepo" />
+      <option name="url" value="https://repo.maven.apache.org/maven2/" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="BintrayJCenter" />
+      <option name="name" value="BintrayJCenter" />
+      <option name="url" value="https://jcenter.bintray.com/" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="Google" />
+      <option name="name" value="Google" />
+      <option name="url" value="https://dl.google.com/dl/android/maven2/" />
+    </remote-repository>
+  </component>
+</project>

.idea/misc.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_11" default="true" project-jdk-name="11" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/build/classes" />
+  </component>
+  <component name="ProjectType">
+    <option name="id" value="Android" />
+  </component>
+</project>

.idea/runConfigurations.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="RunConfigurationProducerService">
+    <option name="ignoredProducers">
+      <set>
+        <option value="com.android.tools.idea.compose.preview.runconfiguration.ComposePreviewRunConfigurationProducer" />
+      </set>
+    </option>
+  </component>
+</project>

app/.gitignore

@@ -0,0 +1 @@
+/build

app/build.gradle

@@ -0,0 +1,65 @@
+plugins {
+    id 'com.android.application'
+    id 'kotlin-android'
+}
+
+android {
+    compileSdkVersion 30
+    buildToolsVersion "30.0.3"
+
+    defaultConfig {
+        applicationId "com.example.ljgscancode"
+        minSdkVersion 21
+        targetSdkVersion 30
+        versionCode 1
+        versionName "1.0"
+
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+    }
+
+    buildFeatures {
+        viewBinding true
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+        }
+    }
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+}
+
+dependencies {
+    implementation 'com.google.mlkit:barcode-scanning:16.1.1'
+
+    implementation 'com.squareup.okhttp3:okhttp:4.9.1'
+    implementation 'com.squareup.okhttp3:logging-interceptor:4.9.1'
+    implementation 'com.squareup.retrofit2:retrofit:2.9.0'
+    implementation 'com.squareup.retrofit2:converter-jackson:2.9.0'
+
+    implementation 'androidx.camera:camera-camera2:1.1.0-alpha04'
+    implementation 'androidx.camera:camera-lifecycle:1.1.0-alpha04'
+    implementation 'androidx.camera:camera-view:1.0.0-alpha24'
+
+    implementation 'com.github.bumptech.glide:glide:4.12.0'
+    annotationProcessor 'com.github.bumptech.glide:compiler:4.12.0'
+
+    implementation 'androidx.core:core-ktx:1.5.0'
+    implementation "org.jetbrains.kotlinx:kotlinx-coroutines-core:1.4.3"
+    implementation "org.jetbrains.kotlinx:kotlinx-coroutines-android:1.4.3"
+
+    implementation "androidx.lifecycle:lifecycle-viewmodel-ktx:2.3.1"
+    implementation "androidx.lifecycle:lifecycle-livedata-ktx:2.3.1"
+
+    implementation 'androidx.appcompat:appcompat:1.3.0'
+    implementation 'com.google.android.material:material:1.3.0'
+    implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
+    implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
+    testImplementation 'junit:junit:4.13.2'
+    androidTestImplementation 'androidx.test.ext:junit:1.1.2'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
+}

app/proguard-rules.pro

@@ -0,0 +1,21 @@
+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

app/src/androidTest/java/com/example/ljgscancode/ExampleInstrumentedTest.java

@@ -0,0 +1,26 @@
+package com.example.ljgscancode;
+
+import android.content.Context;
+
+import androidx.test.platform.app.InstrumentationRegistry;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import static org.junit.Assert.*;
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
+ */
+@RunWith(AndroidJUnit4.class)
+public class ExampleInstrumentedTest {
+    @Test
+    public void useAppContext() {
+        // Context of the app under test.
+        Context appContext = InstrumentationRegistry.getInstrumentation().getTargetContext();
+        assertEquals("com.example.ljgscancode", appContext.getPackageName());
+    }
+}

app/src/main/AndroidManifest.xml

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.example.ljgscancode">
+
+    <uses-permission android:name="android.permission.INTERNET"/>
+    <uses-permission android:name="android.permission.CAMERA" />
+
+    <uses-feature android:name="android.hardware.camera.any" />
+
+    <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/Theme.LJGScanCode">
+        <activity android:name=".ScanCodeActivity" />
+        <activity android:name=".MainActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>

app/src/main/java/com/example/ljgscancode/ApiService.kt

@@ -0,0 +1,38 @@
+package com.example.ljgscancode
+
+import com.example.ljgscancode.model.LJGResult
+import com.example.ljgscancode.model.Product
+import okhttp3.OkHttpClient
+import okhttp3.logging.HttpLoggingInterceptor
+import retrofit2.Retrofit
+import retrofit2.converter.jackson.JacksonConverterFactory
+import retrofit2.http.*
+
+class ApiService private constructor() {
+    companion object {
+        val instance = ApiService()
+    }
+
+    private val httpLoggingInterceptor =
+        HttpLoggingInterceptor().apply { level = HttpLoggingInterceptor.Level.BASIC }
+
+    private val client = OkHttpClient.Builder()
+        .addInterceptor(httpLoggingInterceptor)
+        .build()
+
+    val retrofit: Retrofit = Retrofit.Builder()
+        .client(client)
+        .baseUrl("https://verify.luojigou.vip")
+        .addConverterFactory(JacksonConverterFactory.create())
+        .build()
+
+    val apiService = retrofit.create(GitHubService::class.java)
+
+    interface GitHubService {
+        @GET("admin/conan/type")
+        suspend fun listProduct(): LJGResult<List<Product>>
+
+        @PUT("admin/conan/type/{typeId}")
+        suspend fun intoStock(@Path("typeId") type:Int,@Body list:List<String>):LJGResult<String>
+    }
+}

app/src/main/java/com/example/ljgscancode/MainActivity.kt

@@ -0,0 +1,78 @@
+package com.example.ljgscancode
+
+import android.content.Intent
+import android.os.Bundle
+import android.util.Log
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.TextView
+import androidx.appcompat.app.AppCompatActivity
+import androidx.lifecycle.ViewModelProvider
+import androidx.recyclerview.widget.GridLayoutManager
+import androidx.recyclerview.widget.RecyclerView
+import com.bumptech.glide.Glide
+import com.example.ljgscancode.databinding.ActivityMainBinding
+import com.example.ljgscancode.model.Product
+import com.example.ljgscancode.viewmodel.ProductListViewModel
+import com.google.android.gms.common.GooglePlayServicesUtil
+
+class MainActivity : AppCompatActivity() {
+    private lateinit var mViewBinding: ActivityMainBinding
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        mViewBinding = ActivityMainBinding.inflate(layoutInflater)
+        setContentView(mViewBinding.root)
+
+        val model = ViewModelProvider(this).get(ProductListViewModel::class.java)
+        model.initData()
+        model.getData().observe(this) {
+            val rv = mViewBinding.recycleView
+            rv.layoutManager = GridLayoutManager(this@MainActivity, 2)
+            rv.adapter = ChooseAdapter(it)
+        }
+    }
+
+    private class ChooseAdapter(val products: List<Product>) :
+        RecyclerView.Adapter<ChooseAdapter.ChooseViewHolder>() {
+        override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ChooseViewHolder {
+            val view =
+                LayoutInflater.from(parent.context).inflate(R.layout.item_choose, parent, false)
+            return ChooseViewHolder(view)
+        }
+
+        override fun onBindViewHolder(holder: ChooseViewHolder, position: Int) {
+            val product = products[position]
+            holder.itemView.setOnClickListener { v: View ->
+                val intent = Intent(v.context, ScanCodeActivity::class.java)
+                intent.putExtra("typeId",product.id )
+                v.context.startActivity(intent)
+            }
+            Glide.with(holder.itemView.context).load(product.imgUrl).into(holder.imageView)
+            holder.textView.text = product.name
+        }
+
+        override fun getItemCount(): Int = products.size
+
+
+        class ChooseViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
+            var imageView: RatioImageView = itemView.findViewById(R.id.imageView)
+            var textView: TextView = itemView.findViewById(R.id.textView)
+        }
+    }
+
+    override fun onPause() {
+        super.onPause()
+        Log.d("Lifecycle", "onPause");
+    }
+
+    override fun onStop() {
+        super.onStop()
+        Log.d("Lifecycle", "onStop");
+    }
+
+    override fun onDestroy() {
+        super.onDestroy()
+        Log.d("Lifecycle", "onDestroy");
+    }
+}

app/src/main/java/com/example/ljgscancode/RatioImageView.java

@@ -0,0 +1,122 @@
+package com.example.ljgscancode;
+
+import android.annotation.SuppressLint;
+import android.content.Context;
+import android.content.res.TypedArray;
+import android.graphics.drawable.Drawable;
+import android.util.AttributeSet;
+import android.widget.ImageView;
+
+
+@SuppressLint("AppCompatCustomView")
+public class RatioImageView extends ImageView {
+
+    /* 优先级从大到小：
+     mIsWidthFitDrawableSizeRatio mIsHeightFitDrawableSizeRatio
+     mWidthRatio mHeightRatio
+     即如果设置了mIsWidthFitDrawableSizeRatio为true，则优先级较低的三个值不生效 */
+
+    private float mDrawableSizeRatio = -1f; // src图片(前景图)的宽高比例
+    // 根据前景图宽高比例测量View,防止图片缩放变形
+    private boolean mIsWidthFitDrawableSizeRatio; // 宽度是否根据src图片(前景图)的比例来测量（高度已知）
+    private boolean mIsHeightFitDrawableSizeRatio; // 高度是否根据src图片(前景图)的比例来测量（宽度已知）
+    // 宽高比例
+    private float mWidthRatio = -1; // 宽度 = 高度*mWidthRatio
+    private float mHeightRatio = -1; // 高度 = 宽度*mHeightRatio
+
+    public RatioImageView(Context context) {
+        this(context, null);
+    }
+
+    public RatioImageView(Context context, AttributeSet attrs) {
+        this(context, attrs, 0);
+    }
+
+    public RatioImageView(Context context, AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr); // 虽然此处会调用setImageDrawable，但此时成员变量还未被正确初始化
+        init(attrs);
+        // 一定要有此代码
+        if (getDrawable() != null) {
+            mDrawableSizeRatio = 1f * getDrawable().getIntrinsicWidth()
+                    / getDrawable().getIntrinsicHeight();
+        }
+    }
+
+    /**
+     * 初始化变量
+     */
+    private void init(AttributeSet attrs) {
+
+        TypedArray a = getContext().obtainStyledAttributes(attrs,
+                R.styleable.RatioImageView);
+        mIsWidthFitDrawableSizeRatio = a.getBoolean(R.styleable.RatioImageView_is_width_fix_drawable_size_ratio,
+                mIsWidthFitDrawableSizeRatio);
+        mIsHeightFitDrawableSizeRatio = a.getBoolean(R.styleable.RatioImageView_is_height_fix_drawable_size_ratio,
+                mIsHeightFitDrawableSizeRatio);
+        mHeightRatio = a.getFloat(
+                R.styleable.RatioImageView_height_to_width_ratio, mHeightRatio);
+        mWidthRatio = a.getFloat(
+                R.styleable.RatioImageView_width_to_height_ratio, mWidthRatio);
+        a.recycle();
+    }
+
+    @Override
+    public void setImageResource(int resId) {
+        super.setImageResource(resId);
+        if (getDrawable() != null) {
+            mDrawableSizeRatio = 1f * getDrawable().getIntrinsicWidth()
+                    / getDrawable().getIntrinsicHeight();
+            if (mDrawableSizeRatio > 0
+                    && (mIsWidthFitDrawableSizeRatio || mIsHeightFitDrawableSizeRatio)) {
+                requestLayout();
+            }
+        }
+    }
+
+    @Override
+    public void setImageDrawable(Drawable drawable) {
+        super.setImageDrawable(drawable);
+        if (getDrawable() != null) {
+            mDrawableSizeRatio = 1f * getDrawable().getIntrinsicWidth()
+                    / getDrawable().getIntrinsicHeight();
+            if (mDrawableSizeRatio > 0
+                    && (mIsWidthFitDrawableSizeRatio || mIsHeightFitDrawableSizeRatio)) {
+                requestLayout();
+            }
+        }
+    }
+
+    @Override
+    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
+        // 优先级从大到小：
+        // mIsWidthFitDrawableSizeRatio mIsHeightFitDrawableSizeRatio
+        // mWidthRatio mHeightRatio
+        if (mDrawableSizeRatio > 0) {
+            // 根据前景图宽高比例来测量view的大小
+            if (mIsWidthFitDrawableSizeRatio) {
+                mWidthRatio = mDrawableSizeRatio;
+            } else if (mIsHeightFitDrawableSizeRatio) {
+                mHeightRatio = 1 / mDrawableSizeRatio;
+            }
+        }
+
+        if (mHeightRatio > 0 && mWidthRatio > 0) {
+            throw new RuntimeException("高度和宽度不能同时设置百分比！！");
+        }
+
+        if (mWidthRatio > 0) { // 高度已知，根据比例，设置宽度
+            int height = MeasureSpec.getSize(heightMeasureSpec);
+            super.onMeasure(MeasureSpec.makeMeasureSpec(
+                    (int) (height * mWidthRatio), MeasureSpec.EXACTLY),
+                    MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY));
+        } else if (mHeightRatio > 0) { // 宽度已知，根据比例，设置高度
+            int width = MeasureSpec.getSize(widthMeasureSpec);
+            super.onMeasure(MeasureSpec.makeMeasureSpec(width,
+                    MeasureSpec.EXACTLY), MeasureSpec.makeMeasureSpec(
+                    (int) (width * mHeightRatio), MeasureSpec.EXACTLY));
+        } else { // 系统默认测量
+            super.onMeasure(widthMeasureSpec, heightMeasureSpec);
+        }
+    }
+
+}

app/src/main/java/com/example/ljgscancode/ScanCodeActivity.kt

@@ -0,0 +1,242 @@
+package com.example.ljgscancode
+
+import android.Manifest
+import android.content.pm.PackageManager
+import android.os.Bundle
+import android.os.Handler
+import android.os.Looper
+import android.os.Message
+import android.util.Log
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.TextView
+import android.widget.Toast
+import androidx.appcompat.app.AppCompatActivity
+import androidx.camera.core.*
+import androidx.camera.lifecycle.ProcessCameraProvider
+import androidx.core.app.ActivityCompat
+import androidx.core.content.ContextCompat
+import androidx.lifecycle.ViewModelProvider
+import androidx.recyclerview.widget.GridLayoutManager
+import androidx.recyclerview.widget.RecyclerView
+import com.bumptech.glide.Glide
+import com.example.ljgscancode.databinding.ActivityScanCodeBinding
+import com.example.ljgscancode.model.Product
+import com.example.ljgscancode.viewmodel.ResultListViewModel
+import com.google.mlkit.vision.barcode.BarcodeScanning
+import com.google.mlkit.vision.common.InputImage
+import kotlinx.coroutines.GlobalScope
+import kotlinx.coroutines.launch
+import java.lang.ref.WeakReference
+import java.nio.ByteBuffer
+import java.util.concurrent.ExecutorService
+import java.util.concurrent.Executors
+
+
+class ScanCodeActivity : AppCompatActivity() {
+
+    companion object {
+        private const val TAG = "CameraXBasic"
+        private const val REQUEST_CODE_PERMISSIONS = 10
+        private val REQUIRED_PERMISSIONS = arrayOf(Manifest.permission.CAMERA)
+    }
+
+    private lateinit var cameraExecutor: ExecutorService
+    private lateinit var binding: ActivityScanCodeBinding
+    private lateinit var resultList: ResultListViewModel
+
+    private var handler: CodeHandler? = null
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        binding = ActivityScanCodeBinding.inflate(layoutInflater)
+        setContentView(binding.root)
+
+        /// 请求权限
+        if (allPermissionsGranted()) {
+            startCamera()
+        } else {
+            ActivityCompat.requestPermissions(this, REQUIRED_PERMISSIONS, REQUEST_CODE_PERMISSIONS)
+        }
+
+        val type = intent.getStringExtra("typeId")!!
+
+        handler = CodeHandler(this)
+
+        binding.resultView.layoutManager =
+            GridLayoutManager(this, 3, GridLayoutManager.HORIZONTAL, false)
+
+        resultList = ViewModelProvider(this).get(ResultListViewModel::class.java)
+
+        resultList.getData().observe(this) {
+//            if (it.isNotEmpty()) {
+//                binding.resultViewBox.visibility = View.VISIBLE
+//            }else{
+//                binding.resultViewBox.visibility = View.INVISIBLE
+//            }
+            binding.resultView.adapter = ResultAdapter(it)
+        }
+        resultList.initData(this, typeId = type)
+
+        binding.intoStock.setOnClickListener {
+            resultList.intoStock(this)
+        }
+
+        cameraExecutor = Executors.newSingleThreadExecutor()
+    }
+
+
+    private fun startCamera() {
+        val cameraProviderFuture = ProcessCameraProvider.getInstance(this)
+
+        cameraProviderFuture.addListener({
+            val cameraProvider: ProcessCameraProvider = cameraProviderFuture.get()
+            val cameraSelector = CameraSelector.DEFAULT_BACK_CAMERA
+            val preview = Preview.Builder().build().also {
+                it.setSurfaceProvider(binding.viewFinder.surfaceProvider)
+            }
+
+            val mlScancode = ImageAnalysis.Builder().build().also {
+                it.setAnalyzer(cameraExecutor, MLScanCodeAnalyzer(handler))
+            }
+
+            try {
+                cameraProvider.unbindAll()
+
+                cameraProvider.bindToLifecycle(
+                    this, cameraSelector, preview, mlScancode
+                )
+
+            } catch (exc: Exception) {
+                Log.e(TAG, "Use case binding failed", exc)
+            }
+
+        }, ContextCompat.getMainExecutor(this))
+    }
+
+    fun addResult(result: String) {
+        resultList.addResult(result)
+    }
+
+    private fun allPermissionsGranted(): Boolean {
+        return REQUIRED_PERMISSIONS.all {
+            ContextCompat.checkSelfPermission(
+                baseContext, it
+            ) == PackageManager.PERMISSION_GRANTED
+        }
+    }
+
+    override fun onRequestPermissionsResult(
+        requestCode: Int,
+        permissions: Array<String>,
+        grantResults: IntArray,
+    ) {
+        super.onRequestPermissionsResult(requestCode, permissions, grantResults)
+        if (requestCode == REQUEST_CODE_PERMISSIONS) {
+            if (allPermissionsGranted()) {
+                startCamera()
+            } else {
+                Toast.makeText(
+                    this,
+                    "请去设置里授予程序相机权限",
+                    Toast.LENGTH_SHORT
+                ).show()
+            }
+        }
+    }
+
+
+    override fun onDestroy() {
+        super.onDestroy()
+        cameraExecutor.shutdown()
+        handler = null
+    }
+
+
+    private class MLScanCodeAnalyzer(val handler: CodeHandler?) : ImageAnalysis.Analyzer {
+        private var isAnalyze: Boolean = false;
+
+        private fun ImageProxy.toInputImage(byteBuffer: ByteBuffer): InputImage {
+
+            return InputImage.fromByteBuffer(
+                byteBuffer,
+                this.width,
+                this.height,
+                this.imageInfo.rotationDegrees,
+                InputImage.IMAGE_FORMAT_YV12
+            )
+        }
+
+
+        override fun analyze(image: ImageProxy) {
+            val buffer = image.planes[0].buffer
+
+            try {
+                scanBarcodes(image.toInputImage(buffer))
+            } catch (e: Exception) {
+                Log.d(TAG, "analyze with exception:${e.stackTrace}")
+            } finally {
+                buffer.clear()
+                image.close()
+            }
+        }
+
+        private fun scanBarcodes(image: InputImage) {
+            if (isAnalyze) return;
+            isAnalyze = true;
+            val scanner = BarcodeScanning.getClient()
+            val result = scanner.process(image)
+                .addOnSuccessListener { barcodes ->
+                    for (barcode in barcodes) {
+                        if (handler != null) {
+                            val message = handler.obtainMessage(1, barcode.rawValue)
+                            handler.sendMessage(message)
+                        }
+//                        Log.d(TAG, "code scan result:  ${barcode.rawValue}")
+                    }
+                }
+                .addOnFailureListener {
+                    // Task failed with an exception
+                    // ...
+                }
+            isAnalyze = false;
+        }
+    }
+
+    class CodeHandler(activity: ScanCodeActivity) : Handler(Looper.getMainLooper()) {
+        private val activity: WeakReference<ScanCodeActivity> = WeakReference(activity)
+
+        override fun handleMessage(msg: Message) {
+            super.handleMessage(msg)
+
+            if (msg.what == 1) {
+                activity.get()?.addResult(msg.obj as String)
+            } else {
+
+            }
+        }
+    }
+
+    private class ResultAdapter(val results: List<String>) :
+        RecyclerView.Adapter<ResultAdapter.ResultViewHolder>() {
+        override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ResultViewHolder {
+            val view =
+                LayoutInflater.from(parent.context).inflate(R.layout.item_result, parent, false)
+            return ResultViewHolder(view)
+        }
+
+        override fun onBindViewHolder(holder: ResultViewHolder, position: Int) {
+            val result = results[position]
+
+            holder.textView.text = result
+        }
+
+        override fun getItemCount(): Int = results.size
+
+
+        class ResultViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
+            var textView: TextView = itemView.findViewById(R.id.resultText)
+        }
+    }
+}

app/src/main/java/com/example/ljgscancode/data/CodeResultDatabase.kt

@@ -0,0 +1,39 @@
+package com.example.ljgscancode.data
+
+import android.content.Context
+import android.database.sqlite.SQLiteDatabase
+import android.database.sqlite.SQLiteOpenHelper
+
+class CodeResultDatabase private constructor(context: Context, name: String, version: Int) :
+    SQLiteOpenHelper(context, name, null, version) {
+
+    companion object {
+        val codeResultTableName = "CodeResult"
+
+    }
+
+    private val createTable = "create table $codeResultTableName (" +
+            "id integer primary key autoincrement," +
+            "type text," +
+            "code text)"
+
+
+
+    override fun onCreate(db: SQLiteDatabase?) {
+        db?.execSQL(createTable)
+    }
+
+    override fun onUpgrade(db: SQLiteDatabase?, oldVersion: Int, newVersion: Int) {
+        onCreate(db)
+    }
+
+
+    class Build(context: Context, version: Int) {
+        private var database: CodeResultDatabase = CodeResultDatabase(context, "CodeResult.db", version);
+
+
+        fun build(): CodeResultDatabase {
+            return database;
+        }
+    }
+}

app/src/main/java/com/example/ljgscancode/model/LJGResult.kt

@@ -0,0 +1,9 @@
+package com.example.ljgscancode.model
+
+data class LJGResult<T>(
+    val status: String = "000",
+    val data: T? = null,
+    val msg: String? = null
+) {
+    val isSuccess: Boolean get() = status == "200"
+}

app/src/main/java/com/example/ljgscancode/model/Product.kt

@@ -0,0 +1,10 @@
+package com.example.ljgscancode.model
+
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties
+
+@JsonIgnoreProperties(ignoreUnknown = true)
+data class Product(
+    val name: String? = null,
+    val imgUrl: String? = null,
+    val id: String?=null,
+);

app/src/main/java/com/example/ljgscancode/viewmodel/ProductListViewModel.kt

@@ -0,0 +1,28 @@
+package com.example.ljgscancode.viewmodel
+
+import androidx.lifecycle.*
+import com.example.ljgscancode.ApiService
+import com.example.ljgscancode.model.Product
+import kotlinx.coroutines.launch
+import java.lang.Exception
+
+class ProductListViewModel : ViewModel() {
+    private var mutableLiveData = MutableLiveData<List<Product>>()
+
+    fun getData():LiveData<List<Product>> {
+        return mutableLiveData
+    }
+
+    fun initData(){
+        viewModelScope.launch {
+            try {
+                val resultCall = ApiService.instance.apiService.listProduct()
+                mutableLiveData.value = resultCall.data ?: ArrayList()
+            }catch (e:Exception){
+                e.printStackTrace()
+            }
+        }
+    }
+
+
+}

app/src/main/java/com/example/ljgscancode/viewmodel/ResultListViewModel.kt

@@ -0,0 +1,91 @@
+package com.example.ljgscancode.viewmodel
+
+import android.content.Context
+import android.widget.Toast
+import androidx.core.content.contentValuesOf
+import androidx.lifecycle.LiveData
+import androidx.lifecycle.MutableLiveData
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import com.example.ljgscancode.ApiService
+import com.example.ljgscancode.data.CodeResultDatabase
+import kotlinx.coroutines.launch
+import java.lang.Exception
+
+class ResultListViewModel : ViewModel() {
+    private var mutableLiveData = MutableLiveData<List<String>>()
+
+    private lateinit var typeId: String
+    private lateinit var database: CodeResultDatabase
+
+    private val resultList = ArrayList<String>()
+
+    fun getData(): LiveData<List<String>> {
+        return mutableLiveData
+    }
+
+    fun initData(context: Context, typeId: String) {
+        this.typeId = typeId
+        try {
+            database = CodeResultDatabase.Build(context, 1).build();
+            val db = database.writableDatabase
+
+            val cursor = db.rawQuery("select * from CodeResult where type=?", arrayOf(typeId))
+            if (cursor.moveToFirst()) {
+                do {
+                    val code = cursor.getString(cursor.getColumnIndex("code"))
+                    resultList.add(code)
+                } while (cursor.moveToNext())
+            }
+            cursor.close()
+            mutableLiveData.value = resultList
+
+        } catch (e: Exception) {
+            e.printStackTrace()
+        }
+    }
+
+    fun addResult(result: String) {
+        if (!resultList.contains(result)) {
+            resultList.add(result)
+            val db = database.writableDatabase
+
+            db.insert(
+                CodeResultDatabase.codeResultTableName,
+                null,
+                contentValuesOf(
+                    "code" to result,
+                    "type" to typeId,
+                )
+            )
+
+            mutableLiveData.value = resultList
+        }
+    }
+
+    fun intoStock(context: Context) {
+        if (resultList.size <= 0) return
+        viewModelScope.launch {
+            var result = ApiService.instance.apiService.intoStock(1, resultList)
+
+            Toast.makeText(context,result.msg,Toast.LENGTH_SHORT).show()
+
+            if (result.isSuccess) {
+                resultList.forEach { deleteCodeFromSQLite(it) }
+                resultList.clear()
+                mutableLiveData.value = resultList
+            }
+        }
+
+    }
+
+    private fun deleteCodeFromSQLite(code: String) {
+        val db = database.writableDatabase
+        db.delete(
+            CodeResultDatabase.codeResultTableName,
+            "type = ? and code = ?",
+            arrayOf(typeId, code),
+        )
+    }
+
+}

app/src/main/res/drawable-v24/ic_launcher_foreground.xml

@@ -0,0 +1,30 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:aapt="http://schemas.android.com/aapt"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <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">
+        <aapt:attr name="android:fillColor">
+            <gradient
+                android:endX="85.84757"
+                android:endY="92.4963"
+                android:startX="42.9492"
+                android:startY="49.59793"
+                android:type="linear">
+                <item
+                    android:color="#44000000"
+                    android:offset="0.0" />
+                <item
+                    android:color="#00000000"
+                    android:offset="1.0" />
+            </gradient>
+        </aapt:attr>
+    </path>
+    <path
+        android:fillColor="#FFFFFF"
+        android:fillType="nonZero"
+        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"
+        android:strokeWidth="1"
+        android:strokeColor="#00000000" />
+</vector>

app/src/main/res/drawable/ic_launcher_background.xml

@@ -0,0 +1,170 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <path
+        android:fillColor="#3DDC84"
+        android:pathData="M0,0h108v108h-108z" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M9,0L9,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,0L19,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M29,0L29,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M39,0L39,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M49,0L49,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M59,0L59,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M69,0L69,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M79,0L79,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M89,0L89,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M99,0L99,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,9L108,9"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,19L108,19"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,29L108,29"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,39L108,39"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,49L108,49"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,59L108,59"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,69L108,69"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,79L108,79"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,89L108,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,99L108,99"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,29L89,29"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,39L89,39"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,49L89,49"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,59L89,59"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,69L89,69"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,79L89,79"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M29,19L29,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M39,19L39,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M49,19L49,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M59,19L59,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M69,19L69,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M79,19L79,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+</vector>

app/src/main/res/layout/activity_main.xml

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".MainActivity">
+
+
+    <androidx.recyclerview.widget.RecyclerView
+        android:id="@+id/recycleView"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+</androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/layout/activity_scan_code.xml

@@ -0,0 +1,53 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".ScanCodeActivity">
+
+
+    <androidx.camera.view.PreviewView
+        android:id="@+id/viewFinder"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <LinearLayout
+        android:id="@+id/resultViewBox"
+        android:layout_width="match_parent"
+        android:layout_height="160dp"
+        android:layout_marginHorizontal="16dp"
+        android:layout_marginBottom="8dp"
+        android:elevation="2dp"
+        android:scaleType="fitCenter"
+        android:background="@color/white"
+        app:layout_constraintBottom_toTopOf="@+id/intoStock"
+        app:layout_constraintLeft_toLeftOf="parent"
+        app:layout_constraintRight_toRightOf="parent">
+
+        <androidx.recyclerview.widget.RecyclerView
+            android:id="@+id/resultView"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent" />
+
+    </LinearLayout>
+
+
+    <Button
+        android:id="@+id/intoStock"
+        android:layout_width="match_parent"
+        android:layout_height="40dp"
+        android:layout_marginHorizontal="16dp"
+        android:elevation="2dp"
+        android:scaleType="fitCenter"
+        android:text="入库"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintLeft_toLeftOf="parent"
+        app:layout_constraintRight_toRightOf="parent"
+        app:layout_constraintStart_toStartOf="parent" />
+</androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/layout/item_choose.xml

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:layout_margin="8dp"
+    android:orientation="vertical">
+
+    <com.example.ljgscancode.RatioImageView
+        android:id="@+id/imageView"
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        app:height_to_width_ratio="1.0"
+        app:is_height_fix_drawable_size_ratio="true" />
+
+    <TextView
+        android:id="@+id/textView"
+        android:layout_width="match_parent"
+        android:layout_height="18dp"
+        android:text="" />
+</LinearLayout>

app/src/main/res/layout/item_result.xml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="160dp"
+    android:layout_height="match_parent">
+
+    <TextView
+        android:id="@+id/resultText"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text=""
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+</androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@drawable/ic_launcher_background" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>

app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@drawable/ic_launcher_background" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>

app/src/main/res/values-night/themes.xml

@@ -0,0 +1,16 @@
+<resources xmlns:tools="http://schemas.android.com/tools">
+    <!-- Base application theme. -->
+    <style name="Theme.LJGScanCode" parent="Theme.MaterialComponents.DayNight.DarkActionBar">
+        <!-- Primary brand color. -->
+        <item name="colorPrimary">@color/purple_200</item>
+        <item name="colorPrimaryVariant">@color/purple_700</item>
+        <item name="colorOnPrimary">@color/black</item>
+        <!-- Secondary brand color. -->
+        <item name="colorSecondary">@color/teal_200</item>
+        <item name="colorSecondaryVariant">@color/teal_200</item>
+        <item name="colorOnSecondary">@color/black</item>
+        <!-- Status bar color. -->
+        <item name="android:statusBarColor" tools:targetApi="l">?attr/colorPrimaryVariant</item>
+        <!-- Customize your theme here. -->
+    </style>
+</resources>

app/src/main/res/values/attrs.xml

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <declare-styleable name="RatioImageView">
+
+        <!--宽度是否根据src图片的比例来测量（高度已知）-->
+        <attr name="is_width_fix_drawable_size_ratio" format="boolean"/>
+        <!--高度是否根据src图片的比例来测量（宽度已知）-->
+        <attr name="is_height_fix_drawable_size_ratio" format="boolean"/>
+
+        <!-- 高度设置，参考宽度，如0.5 , 表示 高度＝宽度×０.5 -->
+        <attr name="height_to_width_ratio" format="float"/>
+        <!-- 宽度设置，参考高度，如0.5 , 表示 宽度＝高度×０.5 -->
+        <attr name="width_to_height_ratio" format="float"/>
+
+    </declare-styleable>
+</resources>

app/src/main/res/values/colors.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="purple_200">#FFBB86FC</color>
+    <color name="purple_500">#FF6200EE</color>
+    <color name="purple_700">#FF3700B3</color>
+    <color name="teal_200">#FF03DAC5</color>
+    <color name="teal_700">#FF018786</color>
+    <color name="black">#FF000000</color>
+    <color name="white">#FFFFFFFF</color>
+</resources>

app/src/main/res/values/strings.xml

@@ -0,0 +1,3 @@
+<resources>
+    <string name="app_name">LJGScanCode</string>
+</resources>

app/src/main/res/values/themes.xml

@@ -0,0 +1,16 @@
+<resources xmlns:tools="http://schemas.android.com/tools">
+    <!-- Base application theme. -->
+    <style name="Theme.LJGScanCode" parent="Theme.MaterialComponents.DayNight.DarkActionBar">
+        <!-- Primary brand color. -->
+        <item name="colorPrimary">@color/purple_500</item>
+        <item name="colorPrimaryVariant">@color/purple_700</item>
+        <item name="colorOnPrimary">@color/white</item>
+        <!-- Secondary brand color. -->
+        <item name="colorSecondary">@color/teal_200</item>
+        <item name="colorSecondaryVariant">@color/teal_700</item>
+        <item name="colorOnSecondary">@color/black</item>
+        <!-- Status bar color. -->
+        <item name="android:statusBarColor" tools:targetApi="l">?attr/colorPrimaryVariant</item>
+        <!-- Customize your theme here. -->
+    </style>
+</resources>

app/src/test/java/com/example/ljgscancode/ExampleUnitTest.java

@@ -0,0 +1,17 @@
+package com.example.ljgscancode;
+
+import org.junit.Test;
+
+import static org.junit.Assert.*;
+
+/**
+ * Example local unit test, which will execute on the development machine (host).
+ *
+ * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
+ */
+public class ExampleUnitTest {
+    @Test
+    public void addition_isCorrect() {
+        assertEquals(4, 2 + 2);
+    }
+}

build.gradle

@@ -0,0 +1,25 @@
+// Top-level build file where you can add configuration options common to all sub-projects/modules.
+buildscript {
+    ext.kotlin_version = '1.5.0'
+
+    repositories {
+        google()
+        mavenCentral()
+    }
+    dependencies {
+        classpath "com.android.tools.build:gradle:4.2.0"
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+    }
+}
+
+allprojects {
+    repositories {
+        google()
+        mavenCentral()
+        jcenter() // Warning: this repository is going to shut down soon
+    }
+}
+
+task clean(type: Delete) {
+    delete rootProject.buildDir
+}

gradle.properties

@@ -0,0 +1,17 @@
+# 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=-Xmx2048m -Dfile.encoding=UTF-8
+# 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

gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,6 @@
+#Wed May 19 09:07:36 CST 2021
+distributionBase=GRADLE_USER_HOME
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.7.1-bin.zip
+distributionPath=wrapper/dists
+zipStorePath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME

gradlew

@@ -0,0 +1,172 @@
+#!/usr/bin/env sh
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS=""
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=$((i+1))
+    done
+    case $i in
+        (0) set -- ;;
+        (1) set -- "$args0" ;;
+        (2) set -- "$args0" "$args1" ;;
+        (3) set -- "$args0" "$args1" "$args2" ;;
+        (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=$(save "$@")
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+# by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong
+if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then
+  cd "$(dirname "$0")"
+fi
+
+exec "$JAVACMD" "$@"

gradlew.bat

@@ -0,0 +1,84 @@
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS=
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto init
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto init
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:init
+@rem Get command-line arguments, handling Windows variants
+
+if not "%OS%" == "Windows_NT" goto win9xME_args
+
+:win9xME_args
+@rem Slurp the command line arguments.
+set CMD_LINE_ARGS=
+set _SKIP=2
+
+:win9xME_args_slurp
+if "x%~1" == "x" goto execute
+
+set CMD_LINE_ARGS=%*
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

settings.gradle

@@ -0,0 +1,2 @@
+rootProject.name = "LJGScanCode"
+include ':app'