I am trying to use the EWS Java API v1.1.5 (http://archive.msdn.microsoft.com/ewsjavaapi) in an Android application, and have run into a number of issues. I downloaded the source, and followed the instructions provided to compile the EWS Java API in Eclipse. In those instructions you are told to download and add the following pre-requiste jar file dependencies:
- commons-codec-1.4.jar
- commons-httpclient-3.1.jar
- commons-logging-1.1.1.jar
- jcifs-1.3.15.jar
I did this, and followed the build instructions with produced the following jar files:
- EWSAPI-1.1.0.jar
- EWSAPIWithJars-1.1.0
Next, I built a brand new Android application, added the appropriate permissions to the manifest, and then added the following source to the primary activity's OnCreate:
ExchangeService service = new ExchangeService();
ExchangeCredentials credentials = new WebCredentials("emailaddress", "password");
service.setCredentials(credentials);
try
{
service.autodiscoverUrl("emailaddress", this);
}
catch (Exception e)
{
e.printStackTrace();
}
I first tried running this application with the EWSAPI-1.1.0.jar file as a dependency. When I did that, I obtained the following fatal error:
Uncaught handler: thread main exiting due to uncaught exception java.lang.NoClassDefFoundError: org.apache.commons.httpclient.MultiThreadedHttpConnectionManager at microsoft.exchange.webservices.data.ExchangeServiceBase.(Unknown Source) at microsoft.exchange.webservices.data.ExchangeServiceBase.(Unknown Source) at microsoft.exchange.webservices.data.ExchangeService.(Unknown Source) at com.meshin.exchange.ExchangeDiscoveryActivity.onCreate(ExchangeDiscoveryActivity.java:40)
From what I've researched, it seems like this error is being generated because Android comes with the Apache HttpClient 4.0, which doesn't appear to have the MultiThreadedHttpConnectionManager class anymore.
If I instead remove the EWSAPI-1.1.0.jar, and instead use the EWSAPIWithJARS-1.1.0.jar file as a dependency, I get the following error:
VFY: unable to resolve static method 908: Ljavax/xml/stream/XMLOutputFactory; newInstance()Ljavax/xml/stream/XMLOutputFactory; VFY: dead code 0x0008-006a in L microsoft/exchange/webservices/data/EwsUtilities;.formatLogMessage (Ljava/lang/String;Ljava/lang/String;) Ljava/lang/String; VFY: unable to find class referenced in signature (Ljavax/xml/stream/XMLStreamWriter;)
And then eventually...
FATAL EXCEPTION: main java.lang.VerifyError: microsoft.exchange.webservices.data.AutodiscoverService at microsoft.exchange.webservices.data.ExchangeService.getAutodiscoverUrl(Unknown Source) at microsoft.exchange.webservices.data.ExchangeService.autodiscoverUrl(Unknown Source) at com.meshin.exchange.ExchangeDiscoveryActivity.onCreate(ExchangeDiscoveryActivity.java:41)
I am assuming because now I am including the HttpClient 3.1 jar and it is conflicting with the HttpClient 4.0 jar included with the Android libraries.
My question is if there is a way for me to use the EWS Java API in an Android project without having to re-write the parts of it which reference HttpClient 3.1-specific things which are no longer in 4.0.
