OH_Input_AddKeyEventHook

ohos_input_sys::input_manager

Function OH_Input_AddKeyEventHook 

Source 
pub unsafe extern "C" fn OH_Input_AddKeyEventHook(
    callback: Input_KeyEventCallback,
) -> Input_Result
Available on crate feature api-21 only.
Expand description

Add a keyEvent interception hook function. Before using this interface, the user needs to authorize it in the settings.

ohos.permission.HOOK_KEY_EVENT

§Arguments

  • callback - - Hook function, keyEvent will be sent to the hook function for priority processing.

§Returns

  • OH_Input_AddKeyEventHook function result code. [INPUT_SUCCESS] Added hook function successfully.

[INPUT_PARAMETER_ERROR] Failed to add the hook function. Reason: Parameter check failed.

[INPUT_DEVICE_NOT_SUPPORTED] Capability not supported.

[INPUT_PERMISSION_DENIED] Failed to add the hook function. Reason: Permission check failed.

[INPUT_REPEAT_INTERCEPTOR] Failed to add the hook function.

Reason: Repeatedly set the hook function. A process can only have one key hook function.

[INPUT_SERVICE_EXCEPTION] Failed to add the hook function.

Reason: Input service exception, please try again.

Available since API-level: 21