Mobile Phone Blocker

Mobile Phone Blocker Icon

🚀 Use Case / Purpose

A Flutter plugin designed to lock and secure Android devices. It leverages Android DevicePolicyManager to restrict user actions, disable the status bar, and enter kiosk mode.

Example scenario (EMI Financing):
1. User buys phone on EMI.
2. Finance app installs EMI locker.
3. Device locks on missed payment.
4. Unlocks automatically after payment verification.

✨ Features

  • Lock Device: Secures the device, pins app, disables status bar, and hides settings. Prevents safe boot, app installation, and factory reset.
  • Unlock Device: Removes restrictions and restores normal device operation.
  • EMI Status Check: Includes EmiService to verify payment status before unlocking.

⚙️ Setup

IMPORTANT: For this plugin to work, the app MUST be set as the Device Owner. This requires a Factory Reset first.

Method 1: ADB Command

adb shell dpm set-device-owner your.application.id/com.emi.locker.MyDeviceAdminReceiver

Method 2: QR Code Provisioning

Tap the "Welcome" screen 6 times to open the QR scanner and scan a payload like this:

{
  "android.app.extra.PROVISIONING_DEVICE_ADMIN_COMPONENT_NAME": "com.emi.locker/.MyDeviceAdminReceiver",
  "android.app.extra.PROVISIONING_DEVICE_ADMIN_PACKAGE_DOWNLOAD_LOCATION": "https://github.com/Amarj234/flutter_learn_advance/releases/download/apkupload/emi-locker.apk",
  "android.app.extra.PROVISIONING_DEVICE_ADMIN_PACKAGE_CHECKSUM": "BASE64_SHA256_HERE",
  "android.app.extra.PROVISIONING_SKIP_ENCRYPTION": true
}

💻 Usage

Add to pubspec.yaml:

dependencies:
  mobile_phone_blocker: # latest

Dart implementation:

// Lock the device
await DeviceControl.lockDevice();

// Unlock the device
await DeviceControl.unlockDevice();
  • View on Pub.dev LinkedIn
    •  

  • 👨‍💻 Project Info

    🔹 Author: AmarJeet Kushwaha

    🔹 Category: Flutter Plugin / Security

    🔹 Platform: Android (Enterprise)

    🔹 Core Tech: Flutter, Kotlin, DevicePolicyManager

    • EmiService Example
    final emiService = EmiService();
bool paid = await emiService.isEmiPaid();
if (paid) {
  await DeviceControl.unlockDevice();
}