Function OH_Scan_StartScannerDiscovery 

pub unsafe extern "C" fn OH_Scan_StartScannerDiscovery(
    callback: Scan_ScannerDiscoveryCallback,
) -> i32

Available on crate features scan and api-12 only.

This API starts discovering scanners, Register a callback to handle discovered scanner devices.

ohos.permission.PRINT

Arguments

• callback - The Scan_ScannerDiscoveryCallback of scanner discovery event.

Returns

• [Scan_ERROR_NONE] Indicates successful start of scanner search. [SCAN_ERROR_NO_PERMISSION] Indicates have no permission to use this interface. [SCAN_ERROR_RPC_FAILURE] Indicates an RPC communication error. [SCAN_ERROR_SERVER_FAILURE] Indicates An error occurs in the scan process.

Required System Capabilities: SystemCapability.Print.PrintFramework

Available since API-level: 12