How to use EWS Java API on Android application

Question

I'm trying to use EWS Java API for android app to connect to Exchange Server 2010 but I get an error when I used the EWS API:

Exeptions:

Could not find method javax.xml.stream.XMLOutputFactory.newInstance, referenced from method microsoft.exchange.webservices.data.EwsUtilities.formatLogMessage

VFY: unable to resolve static method 6011: Ljavax/xml/stream/XMLOutputFactory;.newInstance ()Ljavax/xml/stream/XMLOutputFactory; Could not find method javax.xml.stream.XMLStreamWriter.writeStartElement, referenced from method microsoft.exchange.webservices.data.EwsUtilities.writeTraceStartElement

Errors:

FATAL EXCEPTION: main 12-26 14:20:10.384:
java.lang.VerifyError: microsoft/exchange/webservices/data/EwsServiceXmlWriter at microsoft.exchange.webservices.data.ServiceRequestBase.emit(Unknown Source) at microsoft.exchange.webservices.data.MultiResponseServiceRequest.execute(Unknown Source)

My source code to send mail is:

ExchangeService service = new ExchangeService();
ExchangeCredentials credentials = new WebCredentials("username", "password");
service.setCredentials(credentials);

try {
    uri = new URI("https://host name/ews/Exchange.asmx");
} catch (URISyntaxException e) {
    e.printStackTrace();
}

service.setUrl(uri);

try {
    EmailMessage msg= new EmailMessage(service);
    msg.setSubject("Heloo World ");
    msg.setBody(MessageBody.getMessageBodyFromText("Send using ews api in android "));
    msg.getToRecipients().add("email address");
    msg.send();
} catch (Exception e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
}

Thanks in advance.

Answer 1

Android packages the javax library that is lighter (and older) than the library used by EWS API. Some methods are missing.

javax.xml.stream.XMLOutputFactory.newInstance method is not available on Android.

You should include in your application a newer version of the javax library. But some conflicts could appear..

I had the same problem with commons-codec library from apache.

See how I resolved the problem here : How to resolve a library conflict (apache commons-codec)

Answer 2

You can use EWSJ, the Android port of EWS Java SDK : https://play.google.com/store/apps/details?id=com.netcompss.android_ewsj