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-rw-r--r--core/java/android/app/admin/DevicePolicyManager.java5
1 files changed, 4 insertions, 1 deletions
diff --git a/core/java/android/app/admin/DevicePolicyManager.java b/core/java/android/app/admin/DevicePolicyManager.java
index 5e7f1e40f9c7..bbdc5323648d 100644
--- a/core/java/android/app/admin/DevicePolicyManager.java
+++ b/core/java/android/app/admin/DevicePolicyManager.java
@@ -4153,8 +4153,11 @@ public class DevicePolicyManager {
* Called by a device or profile owner, or delegated certificate installer, to generate a
* new private/public key pair. If the device supports key generation via secure hardware,
* this method is useful for creating a key in KeyChain that never left the secure hardware.
- *
* Access to the key is controlled the same way as in {@link #installKeyPair}.
+ *
+ * <p>Because this method might take several seconds to complete, it should only be called from
+ * a worker thread. This method returns {@code null} when called from the main thread.
+ *
* @param admin Which {@link DeviceAdminReceiver} this request is associated with, or
* {@code null} if calling from a delegated certificate installer.
* @param algorithm The key generation algorithm, see {@link java.security.KeyPairGenerator}.