[英]error CS0535 Class does not implement interface member
I'm newbie in Xamarin with Visual Studio. 我是使用Visual Studio的Xamarin的新手。 There is an existing xamarin android project in which I had to add a Jar files (SDK), so I created a Binding Library, however it's throwing some errors that I'm trying to solve them by using Metadata.xml, one of them is as follows: 有一个现有的xamarin android项目,我不得不在其中添加一个Jar文件(SDK),因此我创建了一个绑定库,但是它抛出了一些错误,我试图通过使用Metadata.xml来解决它们,其中一个是如下:
'DeviceService' does not implement interface member 'IDeviceService.SetSignResult(int)' 'DeviceService'未实现接口成员'IDeviceService.SetSignResult(int)'
Searching into api.xml I've found this: 搜索api.xml我发现了这一点:
<class abstract="false" deprecated="not deprecated" extends="android.app.Service" extends-generic-aware="android.app.Service" final="false" name="DeviceService" static="false" visibility="public">
<implements name="com.company.deviceService.IDeviceService" name-generic-aware="com.company.deviceService.IDeviceService">
</implements>
<constructor deprecated="not deprecated" final="false" name="DeviceService" static="false" type="com.company.deviceService.DeviceService" visibility="public">
</constructor>
...
<method abstract="false" deprecated="not deprecated" final="false" name="setSignResult" native="false" return="void" static="false" synchronized="false" visibility="public">
<parameter name="p0" type="int">
</parameter>
</method>
<method abstract="false" deprecated="not deprecated" final="false" name="getSignResult" native="false" return="int" static="false" synchronized="false" visibility="public">
</method>
...
</class>
In the Interface there is such method: 在接口中有这样的方法:
IntPtr id_setSignResult_I;
public unsafe void SetSignResult (int p0)
{
if (id_setSignResult_I == IntPtr.Zero)
id_setSignResult_I = JNIEnv.GetMethodID (class_ref, "setSignResult", "(I)V");
JValue* __args = stackalloc JValue [1];
__args [0] = new JValue (p0);
JNIEnv.CallVoidMethod (Handle, id_setSignResult_I, __args);
}
However when I search into generated class DeviceService.cs I found this: 但是,当我搜索生成的类DeviceService.cs时,发现了这一点:
static Delegate cb_setSignResult_I;
#pragma warning disable 0169
static Delegate GetSetSignResult_IHandler ()
{
if (cb_setSignResult_I == null)
cb_setSignResult_I = JNINativeWrapper.CreateDelegate ((Action<IntPtr, IntPtr, int>) n_SetSignResult_I);
return cb_setSignResult_I;
}
static void n_SetSignResult_I (IntPtr jnienv, IntPtr native__this, int p0)
{
global::com.company.deviceService.DeviceService __this = global::Java.Lang.Object.GetObject<global::com.company.deviceService.DeviceService> (jnienv, native__this, JniHandleOwnership.DoNotTransfer);
__this.SignResult = p0;
}
#pragma warning restore 0169
static IntPtr id_getSignResult;
static IntPtr id_setSignResult_I;
public virtual unsafe int SignResult {
// Metadata.xml XPath method reference: path="/api/package[@name='com.company.deviceService']/class[@name='DeviceService']/method[@name='getSignResult' and count(parameter)=0]"
[Register ("getSignResult", "()I", "GetGetSignResultHandler")]
get {
if (id_getSignResult == IntPtr.Zero)
id_getSignResult = JNIEnv.GetMethodID (class_ref, "getSignResult", "()I");
try {
if (GetType () == ThresholdType)
return JNIEnv.CallIntMethod (Handle, id_getSignResult);
else
return JNIEnv.CallNonvirtualIntMethod (Handle, ThresholdClass, JNIEnv.GetMethodID (ThresholdClass, "getSignResult", "()I"));
} finally {
}
}
// Metadata.xml XPath method reference: path="/api/package[@name='com.company.deviceService']/class[@name='DeviceService']/method[@name='setSignResult' and count(parameter)=1 and parameter[1][@type='int']]"
[Register ("setSignResult", "(I)V", "GetSetSignResult_IHandler")]
set {
if (id_setSignResult_I == IntPtr.Zero)
id_setSignResult_I = JNIEnv.GetMethodID (class_ref, "setSignResult", "(I)V");
try {
JValue* __args = stackalloc JValue [1];
__args [0] = new JValue (value);
if (GetType () == ThresholdType)
JNIEnv.CallVoidMethod (Handle, id_setSignResult_I, __args);
else
JNIEnv.CallNonvirtualVoidMethod (Handle, ThresholdClass, JNIEnv.GetMethodID (ThresholdClass, "setSignResult", "(I)V"), __args);
} finally {
}
}
}
For some reason Binding Generator incorrectly infer method implementation or return type, I don't know, and looking into api.xml it seems to be in correct way: void setSignResult (int p0). 出于某种原因,绑定生成器错误地推断了方法的实现或返回类型,我不知道,并且在api.xml中进行查找似乎是正确的方法:void setSignResult(int p0)。 I tried to modify behaviour by using metadata.xml with same error: 我试图通过使用具有相同错误的metas.xml来修改行为:
<attr path="/api/package[@name='Com.Company.deviceservice']/class[@name='DeviceService']/method[@name='SetSignResult'
and count(parameter)=1
and parameter[1][@type='int']]/parameter[1]"
name="managedReturn">Java.Lang.Void</attr>
I looked for another Interface method implementation, similar to before mentioned to compare with it, and I found it correctly generates the method, take at look: 我寻找了另一个Interface方法的实现,类似于之前提到的与之比较的结果,我发现它正确地生成了该方法,请看一下:
static IntPtr id_bcrSymbologyToText_I;
[Register ("bcrSymbologyToText", "(I)Ljava/lang/String;", "GetBcrSymbologyToText_IHandler")]
public virtual unsafe string BcrSymbologyToText (int p0)
{
if (id_bcrSymbologyToText_I == IntPtr.Zero)
id_bcrSymbologyToText_I = JNIEnv.GetMethodID (class_ref, "bcrSymbologyToText", "(I)Ljava/lang/String;");
try {
JValue* __args = stackalloc JValue [1];
__args [0] = new JValue (p0);
if (GetType () == ThresholdType)
return JNIEnv.GetString (JNIEnv.CallObjectMethod (Handle, id_bcrSymbologyToText_I, __args), JniHandleOwnership.TransferLocalRef);
else
return JNIEnv.GetString (JNIEnv.CallNonvirtualObjectMethod (Handle, ThresholdClass, JNIEnv.GetMethodID (ThresholdClass, "bcrSymbologyToText", "(I)Ljava/lang/String;"), __args), JniHandleOwnership.TransferLocalRef);
} finally {
}
}
Please need your help soon! 请尽快需要您的帮助!
Found answer: 找到答案:
Xamarin Binding Generator (Who Works on a Binding Library), are translating in wrong way from java classes to c# classes some java code that it can't perform reingenieering, so generator is creating a setSignResult as a property result from a java method. Xamarin绑定生成器(在绑定库上工作的人)正在以错误的方式将Java类无法转换的某些Java代码转换为c#类,因此生成器将setSignResult创建为java方法的属性结果。 The way to fix those things is using metadata.xml for some type of errors or else, implementing, in my case, the missing method by creating a partial class with same autogenerated class name. 解决这些问题的方法是将meta.xml用于某种类型的错误,否则,通过创建具有相同自动生成的类名的部分类来实现丢失的方法。 Since Binding Generator created DeviceService partial class with its own implementation, I created another DeviceService partial class implementing missing method with following implementation: 由于绑定生成器使用其自己的实现创建了DeviceService部分类,因此我创建了另一个DeviceService部分类,该类通过以下实现来实现缺少的方法:
public partial class DeviceService
{
public void SetSignResult(int p)
{
SignResult = p;
}
}
Works perfect! 完美的作品!
thanks to all 谢谢大家
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