MLKit: Add support for ACTION_SCAN_BARCODE activity

play-services-core/src/main/AndroidManifest.xml

@@ -1032,6 +1032,19 @@
             </intent-filter>
         </service>
 
+        <activity
+            android:name="org.microg.gms.mlkit.BarcodeScanningActivity"
+            android:exported="true"
+            android:process=":ui"
+            android:excludeFromRecents="true"
+            android:theme="@style/Theme.AppCompat.DayNight.NoActionBar">
+            <intent-filter>
+                <action android:name="com.google.android.gms.mlkit.ACTION_SCAN_BARCODE" />
+
+                <category android:name="android.intent.category.DEFAULT" />
+            </intent-filter>
+        </activity>
+
         <service android:name="org.microg.gms.DummyService">
             <intent-filter>
                 <action android:name="com.google.android.contextmanager.service.ContextManagerService.START" />

play-services-core/src/main/kotlin/org/microg/gms/mlkit/BarcodeScanningActivity.kt

@@ -0,0 +1,91 @@
+/**
+ * SPDX-FileCopyrightText: 2025 microG Project Team
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package org.microg.gms.mlkit
+
+import android.Manifest.permission
+import android.content.Intent
+import android.content.pm.PackageManager
+import android.os.Build
+import android.os.Bundle
+import android.widget.ImageView
+import android.widget.TextView
+import androidx.activity.result.contract.ActivityResultContracts
+import androidx.appcompat.app.AlertDialog
+import androidx.appcompat.app.AppCompatActivity
+import androidx.core.content.ContextCompat
+import androidx.lifecycle.lifecycleScope
+import com.google.android.gms.R
+import com.google.android.gms.common.internal.safeparcel.SafeParcelableSerializer
+import org.microg.gms.vision.barcode.QRCodeScannerView
+
+private const val KEY_CALLING_APP_NAME = "extra_calling_app_name"
+private const val KEY_BARCODE_RESULT = "extra_barcode_result"
+
+class BarcodeScanningActivity : AppCompatActivity() {
+
+    private val clientPackageName: String?
+        get() = runCatching {
+            intent?.extras?.takeIf { it.containsKey(KEY_CALLING_APP_NAME) }?.getString(KEY_CALLING_APP_NAME)
+        }.getOrNull()
+
+    private val requestPermissionLauncher =
+        registerForActivityResult(ActivityResultContracts.RequestPermission()) { isGranted: Boolean ->
+            if (isGranted) {
+                startScanning()
+            } else {
+                showPermissionDialog(clientPackageName)
+            }
+        }
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {
+            finish()
+            return
+        }
+        setContentView(R.layout.activity_barcode_scanning)
+        findViewById<ImageView>(R.id.barcode_scanning_cancel).setOnClickListener {
+            finish()
+        }
+        if (clientPackageName != null) {
+            findViewById<TextView>(R.id.barcode_scanning_tips).text = String.format(getString(R.string.barcode_scanner_brand), clientPackageName)
+        }
+        if (ContextCompat.checkSelfPermission(this, permission.CAMERA) != PackageManager.PERMISSION_GRANTED) {
+            requestPermissionLauncher.launch(permission.CAMERA)
+        } else {
+            startScanning()
+        }
+    }
+
+    private fun startScanning(){
+        lifecycleScope.launchWhenCreated {
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
+                val scannerView = findViewById<QRCodeScannerView>(R.id.scannerView)
+                scannerView.startScanner { result ->
+                    if (result != null) {
+                        val resultIntent = Intent().apply {
+                            putExtra(KEY_BARCODE_RESULT, SafeParcelableSerializer.serializeToBytes(result))
+                        }
+                        setResult(RESULT_OK, resultIntent)
+                        finish()
+                    }
+                }
+            }
+        }
+    }
+
+    private fun showPermissionDialog(callingApp: String?) {
+        AlertDialog.Builder(this).apply {
+            setTitle(getString(R.string.camera_permission_dialog_title))
+            setMessage(String.format(getString(R.string.camera_permission_dialog_message), callingApp))
+            setPositiveButton(getString(R.string.camera_permission_dialog_button)){ dialog, _ ->
+                dialog.dismiss()
+                finish()
+            }
+        }.show()
+    }
+
+}

play-services-core/src/main/res/layout-v21/activity_barcode_scanning.xml

@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?>
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <org.microg.gms.vision.barcode.QRCodeScannerView
+        android:id="@+id/scannerView"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"/>
+
+    <ImageView
+        android:id="@+id/barcode_scanning_cancel"
+        android:layout_width="32dp"
+        android:layout_height="32dp"
+        android:layout_gravity="start"
+        android:contentDescription="@android:string/cancel"
+        android:scaleType="centerCrop"
+        android:layout_margin="20dp"
+        android:src="@drawable/ic_close_btn" />
+
+    <TextView
+        android:id="@+id/barcode_scanning_tips"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_margin="20dp"
+        android:textSize="16dp"
+        android:textColor="@android:color/darker_gray"
+        android:layout_gravity="bottom|center"/>
+
+</FrameLayout>

play-services-core/src/main/res/values-zh-rCN/strings.xml

@@ -279,6 +279,10 @@ microG GmsCore 内置一套自由的 SafetyNet 实现，但是官方服务器要
     <string name="auth_action_notification_content">你的 Google 账户需要额外设置。</string>
     <string name="auth_action_activity_explanation">要能在这台设备上使用你的 Google 账户 %s 请完成下列步骤。</string>
     <string name="auth_action_step_enable_lockscreen_description">你的 Google 账户受工作场所或教育机构管理。你的管理员决定设备在可以访问账户数据前需要设置安全屏幕锁。\n\n请设置一个密码、PIN或手势屏幕锁。</string>
+    <string name="barcode_scanner_brand">由 microG 代表“%1$s”扫描</string>
+    <string name="camera_permission_dialog_button">确定</string>
+    <string name="camera_permission_dialog_message">microG 服务需要访问设备的摄像头，才能为%1$s扫描二维码。\n\n若要启用该权限，请在“设置”中向 microG 服务授予相机权限。</string>
+    <string name="camera_permission_dialog_title">需要相机使用权限</string>
     <string name="pref_vending_asset_delivery_summary">当使用 Play 资产传递的应用请求时下载额外的资产</string>
     <string name="pref_vending_asset_delivery_category">Google Play 资产传递</string>
     <string name="pref_vending_asset_delivery_switch">启用按需资产传递</string>

play-services-core/src/main/res/values/strings.xml

@@ -334,4 +334,9 @@ Please set up a password, PIN, or pattern lock screen."</string>
     <string name="games_delete_snapshot_dialog_ok">OK</string>
     <string name="games_delete_snapshot_error">Deletion failed, please try again later</string>
 
+    <string name="barcode_scanner_brand">Scanned by microG on behalf of %1$s</string>
+    <string name="camera_permission_dialog_button">OK</string>
+    <string name="camera_permission_dialog_message">microG services needs to access your device\'s camera to scan a code for %1$s.\n\nTo enable, please grant camera permission to microG services in Settings.</string>
+    <string name="camera_permission_dialog_title">Camera permission required</string>
+
 </resources>

play-services-vision/core/build.gradle

@@ -15,6 +15,10 @@ dependencies {
     implementation project(':play-services-base-core')
     implementation "androidx.annotation:annotation:$annotationVersion"
     implementation "com.google.zxing:core:3.5.2"
+    implementation "androidx.camera:camera-core:1.3.0"
+    implementation "androidx.camera:camera-camera2:1.3.0"
+    implementation "androidx.camera:camera-lifecycle:1.3.0"
+    implementation "androidx.camera:camera-view:1.3.0"
 }
 
 android {

play-services-vision/core/src/main/AndroidManifest.xml

@@ -5,6 +5,10 @@
   -->
 <manifest xmlns:android="http://schemas.android.com/apk/res/android">
 
+    <uses-permission android:name="android.permission.CAMERA"/>
+    <uses-feature
+        android:name="android.hardware.camera"
+        android:required="false" />
 
     <application>
     </application>