android - 如何在 Delphi 中以编程方式拒绝(挂断)Android 上的来电？

Question

Java 解决方案不是问题:

public boolean killCall(Context context) {
    try {
        // Get the boring old TelephonyManager
        TelephonyManager telephonyManager =
                (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);

        // Get the getITelephony() method
        Class classTelephony = Class.forName(telephonyManager.getClass().getName());
        Method methodGetITelephony = classTelephony.getDeclaredMethod("getITelephony");

        // Ignore that the method is supposed to be private
        methodGetITelephony.setAccessible(true);

        // Invoke getITelephony() to get the ITelephony interface
        Object telephonyInterface = methodGetITelephony.invoke(telephonyManager);

        // Get the endCall method from ITelephony
        Class telephonyInterfaceClass =  
                Class.forName(telephonyInterface.getClass().getName());
        Method methodEndCall = telephonyInterfaceClass.getDeclaredMethod("endCall");

        // Invoke endCall()
        methodEndCall.invoke(telephonyInterface);

    } catch (Exception ex) { // Many things can go wrong with reflection calls
        Log.d(TAG,"PhoneStateReceiver **" + ex.toString());
        return false;
    }
    return true;
}

但是如何在 Delphi 中做出相同的解决方案呢？

很遗憾，我没有找到任何解决此问题的指南。

Answer 1

不幸的是，由于 Delphi 的 Android Bridge 框架中的一个已知错误，您所要求的目前无法直接在 Delphi 代码中实现:

QC #120233 Android Jlang_Class interface is missing 19 methods

QP #RSP-12686 Android Jlang_Class interface is missing 19 methods

getDeclaredMethod() 是缺少的方法之一，没有它您将无法访问 ITelephony 接口(interface)。因此，根据 Embarcadero 的文档，您只需用 Java 代码编写应用程序的这一部分，将其包装在 .jar 文件中，然后作为外部 API 导入到您的 Delphi 代码中:

Using a Custom Set of Java Libraries In Your RAD Studio Android Apps

更新:在西雅图，大部分缺失的方法现已添加到Jlang_Class。然而，getDeclaredMethod() 不是其中之一，但幸运的是 getDeclaredMethods() 已被添加，因此您应该能够为此编写一个小的包装器，例如:

function getdeclaredMethod(Cls: Jlang_Class; const Name: JString): JMethod;
var
  Arr: TJavaObjectArray<JMethod>;
  Meth: JMethod;
  I: Integer;
begin
  Result := nil;
  Arr := Cls.getDeclaredMethods;
  for I := 0 to Arr.Length-1 do
  begin
    Meth := Arr.Items[I];
    if Meth.getName.compareTo(Name) = 0 then
    begin
      Result := Method;
      Exit;
    end;
  end;
  raise Exception.CreateFmt('method not found: %s', [Name]);
end;

然后你可以这样做:

function killCall(context: JContext): Boolean;
var
  obj: JObject;
  telephonyManager: JTelephonyManager;
  classTelephony: Jlang_Class;
  methodGetITelephony: JMethod;
  telephonyInterface: JObject;
  telephonyInterfaceClass: Jlang_Class;
  methodEndCall: JMethod;
begin
  try
    // Get the boring old TelephonyManager
    obj := context.getSystemService(TJContext.JavaClass.TELEPHONY_SERVICE);
    telephonyManager := TJTelephonyManager.Wrap((obj as ILocalObject).GetObjectID);

    // Get the getITelephony() method
    classTelephony := TJlang_Class.JavaClass.forName(telephonyManager.getClass.getName);
    methodGetITelephony := getDeclaredMethod(classTelephony, StringToJString('getITelephony'));

    // Ignore that the method is supposed to be private
    methodGetITelephony.setAccessible(True);

    // Invoke getITelephony() to get the ITelephony interface
    telephonyInterface := methodGetITelephony.invoke(telephonyManager);

    // Get the endCall method from ITelephony
    telephonyInterfaceClass := TJlang_Class.JavaClass.forName(telephonyInterface.getClass.getName);
    methodEndCall := getDeclaredMethod(telephonyInterfaceClass, StringToJString('endCall'));

    // Invoke endCall()
    methodEndCall.invoke(telephonyInterface);

    Result := True;
  except
    on E: Exception do // Many things can go wrong with reflection calls
    begin
      //
      Result := False;
    end;
  end;
end;