@Override
public void onDisabled(Context context, Intent intent) {
    super.onDisabled(context, intent);

    // Lock the device as soon as admin is being disabled
    DevicePolicyManager devicePolicyManager = (DevicePolicyManager) context.getSystemService(Context.DEVICE_POLICY_SERVICE);
    devicePolicyManager.lockNow(); // This will lock the device when disabling the admin
}

and in main activity::

// Initialize DevicePolicyManager and ComponentName mDPM = (DevicePolicyManager) getSystemService(DEVICE_POLICY_SERVICE); mDeviceAdmin = new ComponentName(this, MyDeviceAdminReceiver.class);

    // Check if the app is a device administrator
    if (mDPM.isAdminActive(mDeviceAdmin)) {
        // If the app is a device admin, display a message and provide a way to disable it
        Toast.makeText(this, "App is a device admin", Toast.LENGTH_SHORT).show();
        // Provide option to disable
        // This would ideally be a button that calls removeDeviceAdmin()
    } else {
        // If the app is not a device admin, display a message and provide a way to enable it
        Toast.makeText(this, "App is not a device admin", Toast.LENGTH_SHORT).show();
        // Provide option to enable
        // This would ideally be a button that calls enableDeviceAdmin()
    }
}



@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);

    if (requestCode == REQUEST_CODE_ENABLE_ADMIN) {
        if (resultCode == RESULT_OK) {
            // Successfully added as device admin
            Toast.makeText(this, "Device admin enabled", Toast.LENGTH_SHORT).show();
        } else {
            // Failed to add as device admin
            Toast.makeText(this, "Failed to enable device admin", Toast.LENGTH_SHORT).show();
        }
    } else if (requestCode == REQUEST_CODE_REMOVE_ADMIN) {
        if (resultCode == RESULT_OK) {
            // Successfully removed as device admin
            Toast.makeText(this, "Device admin removed", Toast.LENGTH_SHORT).show();
        } else {
            // Failed to remove device admin
            Toast.makeText(this, "Failed to remove device admin", Toast.LENGTH_SHORT).show();
        }
    }
}

}

i did lock the screen while deactivate is there any system set manual our passowrd