When I am using Gmail API ,I am getting java.lang.NoClassDefFoundError: com.google.gson.stream.JsonReader
问题 I am following Google Developer's Doc .I have included all mentioned jars but at runtime I getting this.. java.lang.RuntimeException: An error occured while executing doInBackground() 09-19 12:42:06.416: E/AndroidRuntime(14215): at android.os.AsyncTask$3.done(AsyncTask.java:300) 09-19 12:42:06.416: E/AndroidRuntime(14215): at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:355) 09-19 12:42:06.416: E/AndroidRuntime(14215): at java.util.concurrent.FutureTask.setException