C# 数据楔扫描应用程序Xamarin不工作

我正试图用Xamarin和Datawedge制作一个应用程序，但我遇到了很多困难

首先，我试着这样做：

[Activity(Label = "Scanner.App", Icon = "@drawable/icon", MainLauncher = true, ConfigurationChanges = ConfigChanges.ScreenSize | ConfigChanges.Orientation, ScreenOrientation = ScreenOrientation.Portrait)]
[IntentFilter(new string[] { "barcodescanner.RECVR" }, Categories = new[] { Intent.CategoryDefault })]
public class MainActivity : global::Xamarin.Forms.Platform.Android.FormsApplicationActivity
{
    // This intent string contains the source of the data as a string  
    private static string SOURCE_TAG = "com.motorolasolutions.emdk.datawedge.source";
    // This intent string contains the barcode symbology as a string  
    private static string LABEL_TYPE_TAG = "com.motorolasolutions.emdk.datawedge.label_type";
    // This intent string contains the captured data as a string  
    // (in the case of MSR this data string contains a concatenation of the track data)  
    private static string DATA_STRING_TAG = "com.motorolasolutions.emdk.datawedge.data_string";
    // Intent Action for our operation
    private static string ourIntentAction = "barcodescanner.RECVR";

    // Let's define the API intent strings for the soft scan trigger
    private static String ACTION_SOFTSCANTRIGGER = "com.motorolasolutions.emdk.datawedge.api.ACTION_SOFTSCANTRIGGER";
    private static String EXTRA_PARAM = "com.motorolasolutions.emdk.datawedge.api.EXTRA_PARAMETER";
    private static String DWAPI_TOGGLE_SCANNING = "TOGGLE_SCANNING";

    protected override void OnCreate(Bundle bundle)
    {
        base.OnCreate(bundle);

        global::Xamarin.Forms.Forms.Init(this, bundle);
        LoadApplication(new App());
    }

    private void handleDecodeData(Intent i)
    {
        // check the intent action is for us  
        if (i.Action.Equals(ourIntentAction))
        {
            // define a string that will hold our output  
            String Out = "";
            // get the source of the data  
            String source = i.GetStringExtra(SOURCE_TAG);
            // save it to use later  
            if (source == null) source = "scanner";
            // get the data from the intent  
            String data = i.GetStringExtra(DATA_STRING_TAG);
            // let's define a variable for the data length  


            int data_len = 0;
            // and set it to the length of the data  
            if (data != null) data_len = data.Length;
            // check if the data has come from the barcode scanner  
            if (source.Equals("scanner"))
            {
                // check if there is anything in the data  
                if (data != null && data.Length > 0)
                {
                    // we have some data, so let's get it's symbology  
                    String sLabelType = i.GetStringExtra(LABEL_TYPE_TAG);
                    // check if the string is empty  
                    if (sLabelType != null && sLabelType.Length > 0)
                    {                        // format of the label type string is LABEL-TYPE-SYMBOLOGY  
                        // so let's skip the LABEL-TYPE- portion to get just the symbology  
                        sLabelType = sLabelType.Substring(11);
                    }
                    else
                    {
                        // the string was empty so let's set it to "Unknown"  
                        sLabelType = "Unknown";
                    }


                    // let's construct the beginning of our output string  
                    Out = "Source: Scanner, " + "Symbology: " + sLabelType + ", Length: " + data_len.ToString() + ", Data: ...\r\n";
                }
            }
            // check if the data has come from the MSR  
            if (source.Equals("msr"))
            {
                // construct the beginning of our output string  
                Out = "Source: MSR, Length: " + data_len.ToString() + ", Data: ...\r\n";
            }

            // we need to put the edit box text into a spannable string builder  
            SpannableStringBuilder stringbuilder = new SpannableStringBuilder();
            // add the output string we constructed earlier  
            stringbuilder.Append(Out);
            // now let's highlight our output string in bold type  
            //stringbuilder.SetSpan(new StyleSpan(Typeface.DefaultBold), et.Text.Length, stringbuilder.Length, SpannableString.SPAN_EXCLUSIVE_EXCLUSIVE);  
            // then add the barcode or msr data, plus a new line, and add it to the string builder  
            stringbuilder.Append(data + "\r\n");
        }
    }

    protected override void OnNewIntent(Intent intent)
    {
        handleDecodeData(intent);
    }

当我扫描某个东西时，

onCreate

被调用，这导致了我的应用程序的一个新实例，这是不正常的。通常应调用

OnNewIntent

，但从未触发

这个问题的第二次尝试是这样的

[Activity(Label = "Scanner.App", Name ="com.creonis.scanner.MainActivity", Icon = "@drawable/icon", MainLauncher = true, 
    ConfigurationChanges = ConfigChanges.ScreenSize | ConfigChanges.Orientation, ScreenOrientation = ScreenOrientation.Portrait)]
public class MainActivity : global::Xamarin.Forms.Platform.Android.FormsApplicationActivity
{
    protected override void OnCreate(Bundle bundle)
    {
        base.OnCreate(bundle);

        ScanReceiver _broadcastReceiver = new ScanReceiver();

        global::Xamarin.Forms.Forms.Init(this, bundle);
        var my_application = new App();
        _broadcastReceiver.scanDataReceived += (s, scanData) =>
        {

        };

        // Register the broadcast receiver
        IntentFilter filter = new IntentFilter(ScanReceiver.IntentAction);
        filter.AddCategory(ScanReceiver.IntentCategory);
        this.RegisterReceiver(_broadcastReceiver, filter);

        LoadApplication(my_application);

    }

[BroadcastReceiver(Enabled = true)]
public class ScanReceiver : BroadcastReceiver
{
    // This intent string contains the source of the data as a string  
    private static string SOURCE_TAG = "com.motorolasolutions.emdk.datawedge.source";
    // This intent string contains the barcode symbology as a string  
    private static string LABEL_TYPE_TAG = "com.motorolasolutions.emdk.datawedge.label_type";
    // This intent string contains the captured data as a string  
    // (in the case of MSR this data string contains a concatenation of the track data)  
    private static string DATA_STRING_TAG = "com.motorolasolutions.emdk.datawedge.data_string";
    // Intent Action for our operation
    public static string IntentAction = "barcodescanner.RECVR";
    public static string IntentCategory = "android.intent.category.DEFAULT";

    public event EventHandler<string> scanDataReceived;

    public override void OnReceive(Context context, Intent i)
    {
        // check the intent action is for us  
        if (i.Action.Equals(IntentAction))
        {
            // define a string that will hold our output  
            String Out = "";
            // get the source of the data  
            String source = i.GetStringExtra(SOURCE_TAG);
            // save it to use later  
            if (source == null)
                source = "scanner";
            // get the data from the intent  
            String data = i.GetStringExtra(DATA_STRING_TAG);
            // let's define a variable for the data length  
            int data_len = 0;
            // and set it to the length of the data  
            if (data != null)
                data_len = data.Length;
            // check if the data has come from the barcode scanner  
            if (source.Equals("scanner"))
            {
                // check if there is anything in the data  
                if (data != null && data.Length > 0)
                {
                    // we have some data, so let's get it's symbology  
                    String sLabelType = i.GetStringExtra(LABEL_TYPE_TAG);
                    // check if the string is empty  
                    if (sLabelType != null && sLabelType.Length > 0)
                    {
                        // format of the label type string is LABEL-TYPE-SYMBOLOGY  
                        // so let's skip the LABEL-TYPE- portion to get just the symbology  
                        sLabelType = sLabelType.Substring(11);
                    }
                    else {
                        // the string was empty so let's set it to "Unknown"  
                        sLabelType = "Unknown";
                    }

                    // let's construct the beginning of our output string  
                    Out = "Scanner  " + "Symbology: " + sLabelType + ", Length: " + data_len.ToString() + ", Data: " + data.ToString() + "\r\n";
                }
            }
            // check if the data has come from the MSR  
            if (source.Equals("msr"))
            {
                // construct the beginning of our output string  
                Out = "Source: MSR, Length: " + data_len.ToString() + ", Data: " + data.ToString() + "\r\n";
            }


            if (scanDataReceived != null)
            {
                scanDataReceived(this, Out);
            }
        }
    }
}

[Activity（Label=“Scanner.App”，Name=“com.creonis.Scanner.MainActivity”，Icon=“@drawable/Icon”，MainLauncher=true，
ConfigurationChanges=ConfigChanges.ScreenSize | ConfigChanges.Orientation，ScreenOrientation=ScreenOrientation.Grait）]
公共类主活动：全局：：Xamarin.Forms.Platform.Android.Forms应用活动
{
创建时受保护的覆盖无效（捆绑包）
{
base.OnCreate（bundle）；
ScanReceiver_broadcastReceiver=新的ScanReceiver（）；
全局：：Xamarin.Forms.Forms.Init（这个，bundle）；
var my_application=new App（）；
_broadcastReceiver.ScandaReceived+=（s，Scanda）=>
{
};
//注册广播接收器
IntentFilter过滤器=新的IntentFilter（ScanReceiver.IntentAction）；
filter.AddCategory（ScanReceiver.IntentCategory）；
这个.RegisterReceiver（_broadcastReceiver，filter）；
加载应用程序（我的应用程序）；
}
[广播接收器（已启用=真）]
公共类ScanReceiver:BroadcastReceiver
{
//此意图字符串包含作为字符串的数据源
私有静态字符串SOURCE_TAG=“com.motorolasolutions.emdk.datawedge.SOURCE”；
//此意图字符串包含作为字符串的条形码符号
私有静态字符串LABEL\u TYPE\u TAG=“com.motorolasolutions.emdk.datawedge.LABEL\u TYPE”；
//此意图字符串包含捕获的数据作为字符串
//（对于MSR，此数据字符串包含轨迹数据的串联）
私有静态字符串数据\u string\u TAG=“com.motorolasolutions.emdk.datawedge.DATA\u string”；
//我们行动的意图
公共静态字符串IntentAction=“barcodescanner.RECVR”；
公共静态字符串IntentCategory=“android.intent.category.DEFAULT”；
已接收公共事件事件处理程序；
公共覆盖void OnReceive（上下文，意图i）
{
//检查意向行动是否针对我们
如果（i.作用等于（意图））
{
//定义一个将保存输出的字符串
串出“”；
//获取数据源
String source=i.GetStringExtra（source_标记）；
//保存它以便以后使用
if（source==null）
source=“扫描器”；
//从意图中获取数据
字符串数据=i.GetStringExtra（数据字符串标记）；
//让我们为数据长度定义一个变量
int data_len=0；
//并将其设置为数据的长度
如果（数据！=null）
数据长度=数据长度；
//检查数据是否来自条形码扫描仪
if（source.Equals（“扫描器”））
{
//检查数据中是否有任何内容
if（data！=null&&data.Length>0）
{
//我们有一些数据，所以让我们看看它的符号
String sLabelType=i.GetStringExtra（标签类型标签）；
//检查字符串是否为空
if（sLabelType！=null&&sLabelType.Length>0）
{
//标签类型字符串的格式为label-type-SYMBOLOGY
//因此，让我们跳过标签类型部分，只获取符号
sLabelType=sLabelType.Substring（11）；
}
否则{
//字符串为空，因此我们将其设置为“未知”
sLabelType=“未知”；
}
//让我们构造输出字符串的开头
Out=“Scanner”+”符号：“+sLabelType+”，长度：“+data\u len.ToString（）+”，数据：“+data.ToString（）+”\r\n”；
}
}
//检查数据是否来自MSR
if（来源等于（“msr”））
{
//构造输出字符串的开头
Out=“Source:MSR，长度：“+data\u len.ToString（）+”，数据：“+data.ToString（）+”\r\n”；
}
如果（ScandaReceived！=null）
{
斯堪的纳维亚收到（本，外）；
}
}
}
}

这就导致了当我扫描某个东西时什么都没发生的问题

有人能给我指出正确的方向吗？因为我不知道该怎么做