Android: Programmatically remove my app from Device Administrator?

I'm trying to add a button to my app to remove it from Device Administrator and am using the code below but my app just crashes.

Code:-

On Button Click:-

{
    ComponentName devAdminReceiver = new ComponentName(this, DemoDeviceAdminReceiver.class);
    DevicePolicyManager dpm = (DevicePolicyManager) getSystemService(Context.DEVICE_POLICY_SERVICE);
    dpm.removeActiveAdmin(devAdminReceiver);
}

In the code above, DemoDeviceAdminReceiver is a class that extends DeviceAdminReceiver.

Error log:-

10-28 15:26:09.295: E/AndroidRuntime(26101): FATAL EXCEPTION: main
10-28 15:26:09.295: E/AndroidRuntime(26101): java.lang.IllegalArgumentException: Unknown admin: ComponentInfo{com.dragonnis.intellicover/com.dragonnis.intellicover.DemoDeviceAdminReceiver}
10-28 15:26:09.295: E/AndroidRuntime(26101):    at android.os.Parcel.readException(Parcel.java:1331)
10-28 15:26:09.295: E/AndroidRuntime(26101):    at android.os.Parcel.readException(Parcel.java:1281)
10-28 15:26:09.295: E/AndroidRuntime(26101):    at android.app.admin.IDevicePolicyManager$Stub$Proxy.removeActiveAdmin(IDevicePolicyManager.java:2940)
10-28 15:26:09.295: E/AndroidRuntime(26101):    at android.app.admin.DevicePolicyManager.removeActiveAdmin(DevicePolicyManager.java:183)

It's as you do:

DevicePolicyManager mDPM = (DevicePolicyManager)getSystemService(Context.DEVICE_POLICY_SERVICE);
mDPM.removeActiveAdmin(mDeviceAdminReceiver);

But you need to add these filters to the receiver in AndroidManifest.xml:

    <intent-filter>
        <action android:name="android.app.action.DEVICE_ADMIN_ENABLED" />
        <action android:name="android.app.action.DEVICE_ADMIN_DISABLED" />
    </intent-filter>


@Override
public CharSequence onDisableRequested(Context context, Intent intent) {
    return "Admin rights are beeing requested to be disabled for the app called: '" + context.getString(R.string.app_name) + "'.";
}