Add stack trace to debug log

pom.xml

@@ -42,7 +42,7 @@
             <groupId>com.fsck.k9.mail</groupId>
             <artifactId>lib</artifactId>
             <type>aar</type>
-            <version>0.0.1.b13cb5f</version>
+            <version>0.0.1.8f1d14a</version>
         </dependency>
 
         <dependency>

src/main/java/com/zegoggles/smssync/App.java

@@ -21,7 +21,7 @@
 import com.squareup.otto.Bus;
 
 public class App extends Application {
-    public static final boolean DEBUG = BuildConfig.DEBUG;
+    public static final boolean DEBUG = true;
     public static final boolean LOCAL_LOGV = DEBUG;
     public static final String TAG = "SMSBackup+";
     public static final String LOG = "sms_backup_plus.log";

src/main/java/com/zegoggles/smssync/service/SmsBackupService.java

@@ -21,6 +21,7 @@
 import android.net.NetworkInfo;
 import android.text.format.DateFormat;
 import android.util.Log;
+import com.fsck.k9.mail.K9MailLib;
 import com.fsck.k9.mail.MessagingException;
 import com.squareup.otto.Produce;
 import com.squareup.otto.Subscribe;
@@ -37,6 +38,7 @@
 import com.zegoggles.smssync.service.exception.RequiresWifiException;
 import com.zegoggles.smssync.service.state.BackupState;
 import com.zegoggles.smssync.service.state.SmsSyncState;
+import com.zegoggles.smssync.utils.AppLog;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
@@ -222,7 +224,14 @@ private void handleErrorState(BackupState state) {
             appLog(R.string.app_log_backup_failed_connectivity, state.getDetailedErrorMessage(getResources()));
         } else {
             appLog(R.string.app_log_backup_failed_general_error, state.getDetailedErrorMessage(getResources()));
-
+            String stackTrace = state.getStackTrace();
+            if (stackTrace != null) {
+                appLogDebug(stackTrace);
+                final String k9Log = AppLog.snapshotCurrentLog(K9MailLib.LOG_TAG, 20);
+                if (k9Log != null) {
+                    appLogDebug(k9Log);
+                }
+            }
             if (shouldNotifyUser(state)) {
                 notifyUser(android.R.drawable.stat_sys_warning,
                     getString(R.string.notification_general_error),

src/main/java/com/zegoggles/smssync/service/state/State.java

@@ -12,6 +12,9 @@
 import com.zegoggles.smssync.service.exception.RequiresLoginException;
 import org.jetbrains.annotations.Nullable;
 
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.io.StringWriter;
 import java.util.EnumSet;
 
 public abstract class State {
@@ -55,6 +58,21 @@ public String getDetailedErrorMessage(Resources resources) {
         }
     }
 
+    public String getStackTrace() {
+        Throwable throwable = exception;
+        if (throwable != null) {
+            if (throwable instanceof MessagingException && throwable.getCause() instanceof IOException) {
+                throwable = throwable.getCause();
+            }
+            final StringWriter sw = new StringWriter();
+            throwable.printStackTrace(new PrintWriter(sw));
+            return sw.toString();
+        }
+        else {
+            return null;
+        }
+    }
+
     public boolean isInitialState() {
         return state == SmsSyncState.INITIAL;
     }

src/main/java/com/zegoggles/smssync/utils/AppLog.java

@@ -16,16 +16,19 @@
 import java.io.FileReader;
 import java.io.FileWriter;
 import java.io.IOException;
+import java.io.InputStreamReader;
 import java.io.LineNumberReader;
 import java.io.PrintWriter;
+import java.util.ArrayList;
 import java.util.Date;
+import java.util.List;
 
 import static com.zegoggles.smssync.App.LOCAL_LOGV;
 import static com.zegoggles.smssync.App.TAG;
 
 public class AppLog {
     // keep max 32k worth of logs
-    static final int MAX_SIZE = 32 * 1024;
+    private static final int MAX_SIZE = 32 * 1024;
     public static final int ID = 1;
 
     private PrintWriter writer;
@@ -180,6 +183,27 @@ public static boolean readLog(File f, TextView view) {
         return text.length() > 0;
     }
 
+    public static String snapshotCurrentLog(String tag, int maxLines) {
+        Process logcat;
+        List<String> lines = new ArrayList<String>(50);
+        try {
+            logcat = Runtime.getRuntime().exec(new String[]{"logcat", "-d", tag+":*", "*:S"});
+            BufferedReader br = new BufferedReader(new InputStreamReader(logcat.getInputStream()), 8192);
+            String line;
+            while ((line = br.readLine()) != null) {
+                lines.add(line);
+            }
+            final String separator = System.getProperty("line.separator");
+            final StringBuilder log = new StringBuilder();
+            for (int i=lines.size() - Math.min(maxLines, lines.size()); i<lines.size(); i++) {
+                log.append(lines.get(i)).append(separator);
+            }
+            return log.toString();
+        } catch (Exception ignored) {
+            return null;
+        }
+    }
+
     static File getFile(String name) {
         return new File(Environment.getExternalStorageDirectory(), name);
     }