1# Multimedia Subsystem Changelog 2 3## cl.multimedia.1 getValidCommandsSync Changed 4 5**Access Level** 6 7Public 8 9**Reason for Change** 10 11In earlier versions, the return value of **getValidCommandsSync()** is incorrectly defined as int. It is corrected to **AVControlCommandType**. 12 13**Change Impact** 14 15The change is not compatible with earlier versions. You are advised to use new APIs. 16 17**Change Since** 18 19OpenHarmony SDK 4.1.3.5 20 21**Key API/Component Changes** 22 23getValidCommandsSync(): Array<AVControlCommandType> 24 25**Adaptation Guide** 26 27Before change: 28 29When you use a created **AVSession** object to obtain the commands supported by the controller, the return value is an int array. 30 31let validCommands = avsession.getController().getValidCommandsSync(); 32 33For example, if the application registers only the **play** command callback, validCommands[0] is 0. 34 35After change: 36 37When you use a created **AVSession** object to obtain the commands supported by the controller, the return value is an array of **AVControlCommandType** strings. 38 39let validCommands = avsession.getController().getValidCommandsSync(); 40 41For example, if the application registers only the **play** command callback, validCommands[0] is **'play'**. 42