Initialize Schnappix Photo Booth application with custom UVC camera, silent Wi-Fi IPP printing, local gallery storage, and kiosk screen pinning support

modules/kiosk-mode/android/.gradle/buildOutputCleanup/cache.properties

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+#Mon May 25 16:29:05 CEST 2026
+gradle.version=8.9

modules/kiosk-mode/android/build.gradle

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+apply plugin: 'com.android.library'
+apply plugin: 'expo-module-gradle-plugin'
+apply plugin: 'org.jetbrains.kotlin.android'
+
+android {
+  namespace "expo.modules.kioskmode"
+  compileSdkVersion findProperty("expo.compileSdkVersion") ?: 34
+
+  defaultConfig {
+    minSdkVersion findProperty("expo.minSdkVersion") ?: 23
+    targetSdkVersion findProperty("expo.targetSdkVersion") ?: 34
+  }
+
+  buildFeatures {
+    buildConfig true
+  }
+}
+
+dependencies {
+  implementation 'com.facebook.react:react-android'
+}

modules/kiosk-mode/android/src/main/java/expo/modules/kioskmode/AdminReceiver.kt

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+package expo.modules.kioskmode
+
+import android.app.admin.DeviceAdminReceiver
+import android.content.Context
+import android.content.Intent
+import android.widget.Toast
+import android.content.ComponentName
+
+class AdminReceiver : DeviceAdminReceiver() {
+    override fun onEnabled(context: Context, intent: Intent) {
+        super.onEnabled(context, intent)
+        Toast.makeText(context, "Schnappix Admin Enabled", Toast.LENGTH_SHORT).show()
+    }
+
+    override fun onDisabled(context: Context, intent: Intent) {
+        super.onDisabled(context, intent)
+        Toast.makeText(context, "Schnappix Admin Disabled", Toast.LENGTH_SHORT).show()
+    }
+
+    companion object {
+        fun getComponentName(context: Context): ComponentName {
+            return ComponentName(context.applicationContext, AdminReceiver::class.java)
+        }
+    }
+}

modules/kiosk-mode/android/src/main/java/expo/modules/kioskmode/KioskModeModule.kt

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+package expo.modules.kioskmode
+
+import android.app.Activity
+import android.app.ActivityManager
+import android.app.admin.DevicePolicyManager
+import android.content.Context
+import expo.modules.kotlin.modules.Module
+import expo.modules.kotlin.modules.ModuleDefinition
+
+class KioskModeModule : Module() {
+  override fun definition() = ModuleDefinition {
+    Name("KioskMode")
+
+    Function("startKiosk") {
+      val activity = appContext.currentActivity ?: return@Function false
+      val dpm = activity.getSystemService(Context.DEVICE_POLICY_SERVICE) as DevicePolicyManager
+      val packageName = activity.packageName
+      val adminComponent = AdminReceiver.getComponentName(activity)
+
+      activity.runOnUiThread {
+        try {
+          if (dpm.isDeviceOwnerApp(packageName)) {
+            // Whitelist package to enable true Kiosk Mode
+            dpm.setLockTaskPackages(adminComponent, arrayOf(packageName))
+          }
+          activity.startLockTask()
+        } catch (e: Exception) {
+          e.printStackTrace()
+        }
+      }
+      return@Function true
+    }
+
+    Function("stopKiosk") {
+      val activity = appContext.currentActivity ?: return@Function false
+      activity.runOnUiThread {
+        try {
+          activity.stopLockTask()
+        } catch (e: Exception) {
+          e.printStackTrace()
+        }
+      }
+      return@Function true
+    }
+
+    Function("isKioskActive") {
+      val activity = appContext.currentActivity ?: return@Function false
+      val am = activity.getSystemService(Context.ACTIVITY_SERVICE) as ActivityManager
+      return@Function if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.M) {
+        am.lockTaskModeState != ActivityManager.LOCK_TASK_MODE_NONE
+      } else {
+        @Suppress("DEPRECATION")
+        am.isInLockTaskMode
+      }
+    }
+
+    Function("isDeviceOwner") {
+      val activity = appContext.currentActivity ?: return@Function false
+      val dpm = activity.getSystemService(Context.DEVICE_POLICY_SERVICE) as DevicePolicyManager
+      return@Function dpm.isDeviceOwnerApp(activity.packageName)
+    }
+  }
+}

modules/kiosk-mode/expo-module.config.json

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+{
+  "platforms": ["android"],
+  "android": {
+    "modules": [
+      "expo.modules.kioskmode.KioskModeModule"
+    ]
+  }
+}

modules/kiosk-mode/index.ts

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+import { requireNativeModule } from 'expo-modules-core';
+import { Platform } from 'react-native';
+
+let KioskMode: any = null;
+if (Platform.OS === 'android') {
+  try {
+    KioskMode = requireNativeModule('KioskMode');
+  } catch (e) {
+    console.warn('KioskMode native module not found');
+  }
+}
+
+export interface KioskModeInterface {
+  startKiosk(): boolean;
+  stopKiosk(): boolean;
+  isKioskActive(): boolean;
+  isDeviceOwner(): boolean;
+}
+
+const KioskModeProxy: KioskModeInterface = {
+  startKiosk() {
+    return KioskMode ? KioskMode.startKiosk() : false;
+  },
+  stopKiosk() {
+    return KioskMode ? KioskMode.stopKiosk() : false;
+  },
+  isKioskActive() {
+    return KioskMode ? KioskMode.isKioskActive() : false;
+  },
+  isDeviceOwner() {
+    return KioskMode ? KioskMode.isDeviceOwner() : false;
+  }
+};
+
+export default KioskModeProxy;