Initial commit

.gitignore

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+*.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

CameraXQRDecoder/.gitignore

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+/build

CameraXQRDecoder/build.gradle

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+plugins {
+    id 'com.android.library'
+}
+
+android {
+    compileSdk 30
+
+    defaultConfig {
+        minSdk 21
+        targetSdk 30
+        versionCode 1
+        versionName "1.0"
+        consumerProguardFiles "consumer-rules.pro"
+    }
+
+    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 {
+    compileOnly 'androidx.appcompat:appcompat:1.0.0+'
+    compileOnly 'com.google.android.material:material:1.0.0+'
+
+    def camerax_version = "1.0.0"
+    api "androidx.camera:camera-core:${camerax_version}"
+    api "androidx.camera:camera-camera2:${camerax_version}"
+    api "androidx.camera:camera-lifecycle:${camerax_version}"
+    api "androidx.camera:camera-view:1.0.0-alpha25"
+    api "androidx.camera:camera-extensions:1.0.0-alpha25"
+    api 'com.google.zxing:core:3.3.2'
+}

CameraXQRDecoder/proguard-rules.pro

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+# 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

CameraXQRDecoder/src/main/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.kongzue.cameraxqrdecoder">
+
+    <uses-permission android:name="android.permission.CAMERA" />
+
+</manifest>

CameraXQRDecoder/src/main/java/com/kongzue/cameraxqrdecoder/QrDecoderView.java

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+package com.kongzue.cameraxqrdecoder;
+
+import static androidx.camera.core.ImageAnalysis.STRATEGY_KEEP_ONLY_LATEST;
+
+import static com.kongzue.cameraxqrdecoder.util.Utils.isNull;
+
+import android.annotation.SuppressLint;
+import android.content.Context;
+import android.util.AttributeSet;
+import android.util.DisplayMetrics;
+import android.util.Log;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.FrameLayout;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.camera.core.AspectRatio;
+import androidx.camera.core.CameraSelector;
+import androidx.camera.core.ImageAnalysis;
+import androidx.camera.core.Preview;
+import androidx.camera.core.impl.CameraInternal;
+import androidx.camera.lifecycle.ProcessCameraProvider;
+import androidx.camera.view.PreviewView;
+import androidx.core.content.ContextCompat;
+
+import com.google.common.util.concurrent.ListenableFuture;
+import com.kongzue.cameraxqrdecoder.interfaces.OnWorkFinish;
+import com.kongzue.cameraxqrdecoder.util.QRcodeAnalyzerImpl;
+import com.kongzue.cameraxqrdecoder.util.QrDecoderPermissionUtil;
+
+import java.util.Objects;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+
+/**
+ * @author: Kongzue
+ * @github: https://github.com/kongzue/
+ * @homepage: http://kongzue.com/
+ * @mail: myzcxhh@live.cn
+ * @createTime: 2021/8/28 9:32
+ */
+public class QrDecoderView extends FrameLayout {
+
+    public static boolean DEBUGMODE = true;
+    public static final String ERROR_NO_PERMISSION = "无法初始化：请检查权限，未获得权限：android.permission.CAMERA";
+
+    boolean isFlashOpen;
+    ExecutorService cameraExecutor;
+    boolean finish;
+    CameraInternal cameraInternal;
+    OnWorkFinish<String> onWorkFinish;
+    boolean keepScan;
+
+    public QrDecoderView(@NonNull Context context) {
+        super(context);
+    }
+
+    public QrDecoderView(@NonNull Context context, @Nullable AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    public QrDecoderView(@NonNull Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+    }
+
+    public QrDecoderView(@NonNull Context context, @Nullable AttributeSet attrs, int defStyleAttr, int defStyleRes) {
+        super(context, attrs, defStyleAttr, defStyleRes);
+    }
+
+    public void start(OnWorkFinish<String> onWorkFinish) {
+        if (QrDecoderPermissionUtil.checkPermissions(getContext(), new String[]{"android.permission.CAMERA"})) {
+            this.onWorkFinish = onWorkFinish;
+            addScanQRView();
+        } else {
+            error(ERROR_NO_PERMISSION);
+        }
+    }
+
+    public boolean isFlashOpen() {
+        return isFlashOpen;
+    }
+
+    public QrDecoderView setFlashOpen(boolean flashOpen) {
+        isFlashOpen = flashOpen;
+        if (cameraInternal != null) {
+            cameraInternal.getCameraControl().enableTorch(isFlashOpen);
+        }
+        return this;
+    }
+
+    String oldResult;
+
+    private void addScanQRView() {
+        PreviewView viewFinder = new PreviewView(getContext());
+        addView(viewFinder, new FrameLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));
+
+        viewFinder.post(new Runnable() {
+            @Override
+            public void run() {
+                cameraExecutor = Executors.newSingleThreadExecutor();
+
+                CameraSelector.Builder builder = new CameraSelector.Builder();
+                builder.requireLensFacing(CameraSelector.LENS_FACING_BACK);
+                CameraSelector cameraSelector = builder.build();
+
+                ListenableFuture<ProcessCameraProvider> cameraProviderFuture = ProcessCameraProvider.getInstance(getContext());
+                DisplayMetrics metrics = new DisplayMetrics();
+                viewFinder.getDisplay().getRealMetrics(metrics);
+                int screenAspectRatio = aspectRatio(metrics.widthPixels, metrics.heightPixels);     //屏幕纵横比
+                int rotation = viewFinder.getDisplay().getRotation();
+
+                cameraProviderFuture.addListener(new Runnable() {
+                    @SuppressLint("RestrictedApi")
+                    @Override
+                    public void run() {
+                        try {
+                            ProcessCameraProvider cameraProvider = cameraProviderFuture.get();
+
+                            Preview.Builder pBuilder = new Preview.Builder();
+                            pBuilder.setTargetAspectRatio(screenAspectRatio);
+                            pBuilder.setTargetRotation(rotation);
+                            Preview preview = pBuilder.build();
+
+                            preview.setSurfaceProvider(viewFinder.getSurfaceProvider());
+
+                            ImageAnalysis.Builder iBuilder = new ImageAnalysis.Builder();
+                            iBuilder.setBackpressureStrategy(STRATEGY_KEEP_ONLY_LATEST);
+                            iBuilder.setTargetAspectRatio(screenAspectRatio);
+                            iBuilder.setTargetRotation(rotation);
+
+                            ImageAnalysis analysis = iBuilder.build();
+                            analysis.setAnalyzer(cameraExecutor, new QRcodeAnalyzerImpl(new OnWorkFinish<String>() {
+                                @Override
+                                public void finish(String result) {
+                                    if (!finish && !isNull(result) && !Objects.equals(oldResult, result)) {
+                                        if (!keepScan) finish = true;
+                                        if (onWorkFinish != null) {
+                                            onWorkFinish.finish(result);
+                                        }
+                                        oldResult = result;
+                                    }
+                                }
+                            }));
+
+                            cameraProvider.unbindAll();
+                            cameraProvider.bindToLifecycle((AppCompatActivity) getContext(), cameraSelector, preview, analysis);
+
+                            cameraInternal = preview.getCamera();
+                        } catch (Exception e) {
+                            if (DEBUGMODE) e.printStackTrace();
+                            e.printStackTrace();
+                        }
+                    }
+                }, ContextCompat.getMainExecutor(getContext()));
+            }
+        });
+    }
+
+    double RATIO_4_3_VALUE = 4.0 / 3.0;
+    double RATIO_16_9_VALUE = 16.0 / 9.0;
+
+    private int aspectRatio(int width, int height) {
+        double previewRatio = Math.max(width, height) / Math.min(width, height);
+        if (Math.abs(previewRatio - RATIO_4_3_VALUE) <= Math.abs(previewRatio - RATIO_16_9_VALUE)) {
+            return AspectRatio.RATIO_4_3;
+        }
+        return AspectRatio.RATIO_16_9;
+    }
+
+    private void error(String errorNoPermission) {
+        if (DEBUGMODE) {
+            Log.e("QrDecoderView", errorNoPermission);
+        }
+    }
+
+    public boolean isKeepScan() {
+        return keepScan;
+    }
+
+    public QrDecoderView setKeepScan(boolean keepScan) {
+        this.keepScan = keepScan;
+        return this;
+    }
+}

CameraXQRDecoder/src/main/java/com/kongzue/cameraxqrdecoder/interfaces/OnWorkFinish.java

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+package com.kongzue.cameraxqrdecoder.interfaces;
+
+/**
+ * @author: Kongzue
+ * @github: https://github.com/kongzue/
+ * @homepage: http://kongzue.com/
+ * @mail: myzcxhh@live.cn
+ * @createTime: 2021/8/28 9:41
+ */
+public abstract class OnWorkFinish<D> {
+    public abstract void finish(D d);
+    public void failed(Object e){};
+    public void close(){};
+}