我尝试使用 rn-datawedge-intents 库，但收到此错误 - 无法读取 null 的属性“ACTION_SOFTSCANTRIGGER”。我也尝试过使用其他库，但没有任何效果，这是唯一有一些示例的库，但我无法弄清楚。
这是链接：https://www.npmjs.com/package/react-native-datawedge-intents
我这里有两组基于给定示例的代码 两者都有同样的问题。
import {useEffect} from "react";
import {DeviceEventEmitter} from "react-native";
import DataWedgeIntents from "react-native-datawedge-intents";
export const useBarcodeScanner = () =\> {
useEffect(() =\> {
// Define the action for DataWedge Intents
const action = "com.zebra.dwintents.ACTION";
// Register a receiver for the barcode scans with the appropriate action
DataWedgeIntents.registerReceiver(acti
// Declare a handler for barcode scans
const scanHandler = (deviceEvent: any) => {on, "");
const barcodeValue = deviceEvent.data; // Assuming 'data' contains the barcode value
console.log("Scanned barcode:", barcodeValue);
// Perform further actions with the barcode value here
};
// Listen for scan events sent from the module
DeviceEventEmitter.addListener("barcode_scan", scanHandler);
// Cleanup function
return () => {
// Remove the listener and unregister receiver to prevent memory leaks
DeviceEventEmitter.removeAllListeners("barcode_scan");
DataWedgeIntents.unregisterReceiver();
};
}, \[\]);
const handleScanButtonPress = () =\> {
// Initiates the scan when the button is pressed
DataWedgeIntents.sendIntent(
DataWedgeIntents.ACTION_SOFTSCANTRIGGER,
DataWedgeIntents.START_SCANNING
).catch((error: any) =\> {
console.error("Failed to initiate scan:", error);
});
};
return {handleScanButtonPress};
};
import {useState, useEffect} from "react";
import {DeviceEventEmitter} from "react-native";
import DataWedgeIntents from "react-native-datawedge-intents";
interface Scans {
data: any;
decoder: any;
timeAtDecode: any;
}
const useDataWedgeIntegration = () => {
const [state, setState] = useState({
lastApiVisible: false,
lastApiText: "Messages from DataWedge will go here",
checkBoxesDisabled: true,
scanButtonVisible: false,
dwVersionText:
"Pre 6.3. Please create and configure profile manually. See the ReadMe for more details",
activeProfileText: "Requires DataWedge 6.3+",
enumeratedScannersText: "Requires DataWedge 6.3+",
});
const [sendCommandResult, setCommandResult] = useState("false");
const [scanBarcode, setScanBarcode] = useState<Scans[]>([]);
useEffect(() => {
const deviceEmitterSubscription = DeviceEventEmitter.addListener(
"datawedge_broadcast_intent",
broadcastReceiver
);
registerBroadcastReceiver();
determineVersion();
return () => {
deviceEmitterSubscription.remove();
};
}, []);
const sendCommand = (extraName: string, extraValue: any) => {
console.log(
"Sending Command: " + extraName + ", " + JSON.stringify(extraValue)
);
var broadcastExtras: {[key: string]: any} = {};
broadcastExtras[extraName] = extraValue;
broadcastExtras["SEND_RESULT"] = sendCommandResult;
DataWedgeIntents.sendBroadcastWithExtras({
action: "com.symbol.datawedge.api.ACTION",
extras: broadcastExtras,
});
};
const determineVersion = () => {
sendCommand("com.symbol.datawedge.api.GET_VERSION_INFO", "");
};
const registerBroadcastReceiver = () => {
DataWedgeIntents.registerBroadcastReceiver({
filterActions: [
"com.zebra.reactnativedemo.ACTION",
"com.symbol.datawedge.api.RESULT_ACTION",
],
filterCategories: ["android.intent.category.DEFAULT"],
});
};
const broadcastReceiver = (intent: any) => {
// Broadcast received
console.log("Received Intent: " + JSON.stringify(intent));
if (intent.hasOwnProperty("RESULT_INFO")) {
var commandResult =
intent.RESULT +
" (" +
intent.COMMAND.substring(
intent.COMMAND.lastIndexOf(".") + 1,
intent.COMMAND.length
) +
")"; // + JSON.stringify(intent.RESULT_INFO);
commandReceived(commandResult.toLowerCase());
}
if (
intent.hasOwnProperty("com.symbol.datawedge.api.RESULT_GET_VERSION_INFO")
) {
// The version has been returned (DW 6.3 or higher). Includes the DW version along with other subsystem versions e.g MX
var versionInfo =
intent["com.symbol.datawedge.api.RESULT_GET_VERSION_INFO"];
console.log("Version Info: " + JSON.stringify(versionInfo));
var datawedgeVersion = versionInfo["DATAWEDGE"];
console.log("Datawedge version: " + datawedgeVersion);
// Fire events sequentially so the application can gracefully degrade the functionality available on earlier DW versions
if (datawedgeVersion >= "06.3") datawedge63();
if (datawedgeVersion >= "06.4") datawedge64();
if (datawedgeVersion >= "06.5") datawedge65();
setState((state) => ({...state}));
} else if (
intent.hasOwnProperty(
"com.symbol.datawedge.api.RESULT_ENUMERATE_SCANNERS"
)
) {
// Return from our request to enumerate the available scanners
var enumeratedScannersObj =
intent["com.symbol.datawedge.api.RESULT_ENUMERATE_SCANNERS"];
enumerateScanners(enumeratedScannersObj);
} else if (
intent.hasOwnProperty(
"com.symbol.datawedge.api.RESULT_GET_ACTIVE_PROFILE"
)
) {
// Return from our request to obtain the active profile
var activeProfileObj =
intent["com.symbol.datawedge.api.RESULT_GET_ACTIVE_PROFILE"];
activeProfile(activeProfileObj);
} else if (!intent.hasOwnProperty("RESULT_INFO")) {
// A barcode has been scanned
barcodeScanned(intent, new Date().toLocaleString());
}
};
const datawedge63 = () => {
console.log("Datawedge 6.3 APIs are available");
// Create a profile for our application
sendCommand(
"com.symbol.datawedge.api.CREATE_PROFILE",
"ZebraReactNativeDemo"
);
setState((state) => ({
...state,
dwVersionText:
"6.3. Please configure profile manually. See ReadMe for more details.",
}));
// Although we created the profile we can only configure it with DW 6.4.
sendCommand("com.symbol.datawedge.api.GET_ACTIVE_PROFILE", "");
// Enumerate the available scanners on the device
sendCommand("com.symbol.datawedge.api.ENUMERATE_SCANNERS", "");
// Functionality of the scan button is available
setState((state) => ({...state, scanButtonVisible: true}));
};
const datawedge64 = () => {
console.log("Datawedge 6.4 APIs are available");
// Documentation states the ability to set a profile config is only available from DW 6.4.
// For our purposes, this includes setting the decoders and configuring the associated app / output params of the profile.
setState((state) => ({
...state,
dwVersionText: "6.4.",
// dwVersionTextStyle: styles.itemText,
checkBoxesDisabled: false,
}));
// Configure the created profile (associated app and keyboard plugin)
var profileConfig = {
PROFILE_NAME: "ZebraReactNativeDemo",
PROFILE_ENABLED: "true",
CONFIG_MODE: "UPDATE",
PLUGIN_CONFIG: {
PLUGIN_NAME: "BARCODE",
RESET_CONFIG: "true",
PARAM_LIST: {},
},
APP_LIST: [
{
PACKAGE_NAME: "com.datawedgereactnative.demo",
ACTIVITY_LIST: ["*"],
},
],
};
sendCommand("com.symbol.datawedge.api.SET_CONFIG", profileConfig);
// Configure the created profile (intent plugin)
var profileConfig2 = {
PROFILE_NAME: "ZebraReactNativeDemo",
PROFILE_ENABLED: "true",
CONFIG_MODE: "UPDATE",
PLUGIN_CONFIG: {
PLUGIN_NAME: "INTENT",
RESET_CONFIG: "true",
PARAM_LIST: {
intent_output_enabled: "true",
intent_action: "com.zebra.reactnativedemo.ACTION",
intent_delivery: "2",
},
},
};
sendCommand("com.symbol.datawedge.api.SET_CONFIG", profileConfig2);
// Give some time for the profile to settle then query its value
setTimeout(() => {
sendCommand("com.symbol.datawedge.api.GET_ACTIVE_PROFILE", "");
}, 1000);
};
const datawedge65 = () => {
console.log("Datawedge 6.5 APIs are available");
setState((state) => ({
...state,
dwVersionText: "6.5 or higher.",
lastApiVisible: true,
}));
setCommandResult("true");
};
const commandReceived = (commandText: string) => {
setState((state) => ({...state, lastApiText: commandText}));
};
const enumerateScanners = (enumeratedScanners: any) => {
var humanReadableScannerList = "";
for (var i = 0; i < enumeratedScanners.length; i++) {
console.log(
"Scanner found: name= " +
enumeratedScanners[i].SCANNER_NAME +
", id=" +
enumeratedScanners[i].SCANNER_INDEX +
", connected=" +
enumeratedScanners[i].SCANNER_CONNECTION_STATE
);
humanReadableScannerList += enumeratedScanners[i].SCANNER_NAME;
if (i < enumeratedScanners.length - 1) humanReadableScannerList += ", ";
}
setState((state) => ({
...state,
enumeratedScannersText: humanReadableScannerList,
}));
};
const activeProfile = (theActiveProfile: string) => {
setState((state) => ({...state, activeProfileText: theActiveProfile}));
};
const barcodeScanned = (scanData: any, timeOfScan: any) => {
var scannedData = scanData["com.symbol.datawedge.data_string"];
var scannedType = scanData["com.symbol.datawedge.label_type"];
console.log("Scan: " + scannedData);
setScanBarcode([
{
data: scannedData,
decoder: scannedType,
timeAtDecode: timeOfScan,
},
]);
};
const _onPressScanButton = () => {
sendCommand(
"com.symbol.datawedge.api.SOFT_SCAN_TRIGGER",
"TOGGLE_SCANNING"
);
};
return {
_onPressScanButton,
scanBarcode,
barcodeScanned,
};
};
export default useDataWedgeIntegration;
你能在某个时候解决这个问题吗？