Logcat列出了一些错误，该行以“... 4 more”结尾。我怎样才能收到所有错误消息？
10-26 23:33:14.833: E/AndroidRuntime(4958): FATAL EXCEPTION: AsyncTask #1
10-26 23:33:14.833: E/AndroidRuntime(4958): Process: com.example.gsubdata, PID: 4958
10-26 23:33:14.833: E/AndroidRuntime(4958): java.lang.RuntimeException: An error occured while executing doInBackground()
10-26 23:33:14.833: E/AndroidRuntime(4958): at android.os.AsyncTask$3.done(AsyncTask.java:300)
10-26 23:33:14.833: E/AndroidRuntime(4958): at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:355)
10-26 23:33:14.833: E/AndroidRuntime(4958): at java.util.concurrent.FutureTask.setException(FutureTask.java:222)
10-26 23:33:14.833: E/AndroidRuntime(4958): at java.util.concurrent.FutureTask.run(FutureTask.java:242)
10-26 23:33:14.833: E/AndroidRuntime(4958): at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
10-26 23:33:14.833: E/AndroidRuntime(4958): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
10-26 23:33:14.833: E/AndroidRuntime(4958): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
10-26 23:33:14.833: E/AndroidRuntime(4958): at java.lang.Thread.run(Thread.java:841)
10-26 23:33:14.833: E/AndroidRuntime(4958): Caused by: java.lang.NullPointerException
10-26 23:33:14.833: E/AndroidRuntime(4958): at com.google.gdata.client.http.JdkHttpUrlConnectionSource.openConnection(JdkHttpUrlConnectionSource.java:33)
10-26 23:33:14.833: E/AndroidRuntime(4958): at com.google.gdata.client.http.HttpGDataRequest.getRequestConnection(HttpGDataRequest.java:386)
10-26 23:33:14.833: E/AndroidRuntime(4958): at com.google.gdata.client.http.HttpGDataRequest.<init>(HttpGDataRequest.java:281)
10-26 23:33:14.833: E/AndroidRuntime(4958): at com.google.gdata.client.http.GoogleGDataRequest.<init>(GoogleGDataRequest.java:457)
10-26 23:33:14.833: E/AndroidRuntime(4958): at com.google.gdata.client.http.GoogleGDataRequest$Factory.createRequest(GoogleGDataRequest.java:94)
10-26 23:33:14.833: E/AndroidRuntime(4958): at com.google.gdata.client.http.HttpGDataRequest$Factory.getRequest(HttpGDataRequest.java:165)
10-26 23:33:14.833: E/AndroidRuntime(4958): at com.google.gdata.client.Service.createRequest(Service.java:760)
10-26 23:33:14.833: E/AndroidRuntime(4958): at com.google.gdata.client.GoogleService.createRequest(GoogleService.java:539)
10-26 23:33:14.833: E/AndroidRuntime(4958): at com.google.gdata.client.Service.createFeedRequest(Service.java:1156)
10-26 23:33:14.833: E/AndroidRuntime(4958): at com.google.gdata.client.Service.getFeed(Service.java:997)
10-26 23:33:14.833: E/AndroidRuntime(4958): at com.google.gdata.client.GoogleService.getFeed(GoogleService.java:645)
10-26 23:33:14.833: E/AndroidRuntime(4958): at com.google.gdata.client.Service.getFeed(Service.java:1017)
10-26 23:33:14.833: E/AndroidRuntime(4958): at com.example.gsubdata.MySpreadsheetIntegration.doInBackground(MySpreadsheetIntegration.java:97)
10-26 23:33:14.833: E/AndroidRuntime(4958): at com.example.gsubdata.MySpreadsheetIntegration.doInBackground(MySpreadsheetIntegration.java:1)
10-26 23:33:14.833: E/AndroidRuntime(4958): at android.os.AsyncTask$2.call(AsyncTask.java:288)
10-26 23:33:14.833: E/AndroidRuntime(4958): at java.util.concurrent.FutureTask.run(FutureTask.java:237)
10-26 23:33:14.833: E/AndroidRuntime(4958): ... 4 more