com.google.android.vending.licensing

Interface DeviceLimiter

All Known Implementing Classes:

NullDeviceLimiter

public interface DeviceLimiter

Allows the developer to limit the number of devices using a single license.

The LICENSED response from the server contains a user identifier unique to the <application, user> pair. The developer can send this identifier to their own server along with some device identifier (a random number generated and stored once per application installation, getDeviceId, ANDROID_ID, etc). The more sources used to identify the device, the harder it will be for an attacker to spoof.

The server can look at the <application, user, device id> tuple and restrict a user's application license to run on at most 10 different devices in a week (for example). We recommend not being too restrictive because a user might legitimately have multiple devices or be in the process of changing phones. This will catch egregious violations of multiple people sharing one license.

Method Summary

Methods

Modifier and Type	Method and Description
int	isDeviceAllowed(String userId) Checks if this device is allowed to use the given user's license.

Method Detail

isDeviceAllowed

int isDeviceAllowed(String userId)

Checks if this device is allowed to use the given user's license.

Parameters:

userId - the user whose license the server responded with

Returns:

LICENSED if the device is allowed, NOT_LICENSED if not, RETRY if an error occurs