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Added in API level 23

public static interface MediaDrm.OnExpirationUpdateListener

android.media.MediaDrm.OnExpirationUpdateListener

DRM会话过期更新发生时要调用的回调的接口定义

公共方法(Public methods)
`abstract void`	`onExpirationUpdate(MediaDrm md, byte[] sessionId, long expirationTime)` 在会话过期更新发生时调用，以通知应用程序有关到期时间的更改

Added in API level 23

void onExpirationUpdate (MediaDrm md, 
                byte[] sessionId, 
                long expirationTime)

在会话过期更新发生时调用，以通知应用程序有关到期时间的更改

参数(Parameters)
`md`	`MediaDrm`: the MediaDrm object on which the event occurred
`sessionId`	`byte`: the DRM session ID on which the event occurred
`expirationTime`	`long`: the new expiration time for the keys in the session. The time is in milliseconds, relative to the Unix epoch. A time of 0 indicates that the keys never expire.