diff --git a/res/xml/preferences_advanced.xml b/res/xml/preferences_advanced.xml
index 5ef459117..b6ca23243 100644
--- a/res/xml/preferences_advanced.xml
+++ b/res/xml/preferences_advanced.xml
@@ -54,14 +54,10 @@
 
 
     <PreferenceCategory android:title="@string/pref_other">
-        <Preference android:key="pref_backup"
-                    android:title="@string/pref_backup"
-                    android:summary="@string/pref_backup_explain"/>
 
         <Preference android:key="pref_manage_keys"
                     android:title="@string/pref_manage_keys"/>
 
-
         <Preference android:key="pref_view_log"
                     android:title="@string/pref_view_log"/>
     </PreferenceCategory>
diff --git a/res/xml/preferences_chats.xml b/res/xml/preferences_chats.xml
index 9f9224b61..924f11da2 100644
--- a/res/xml/preferences_chats.xml
+++ b/res/xml/preferences_chats.xml
@@ -33,6 +33,8 @@
 
     </PreferenceCategory>
 
+    <PreferenceCategory android:layout="@layout/preference_divider"/>
+
     <PreferenceCategory android:title="@string/pref_email_interaction_title">
 
         <org.thoughtcrime.securesms.preferences.widgets.ListPreferenceWithSummary
@@ -44,6 +46,13 @@
 
     </PreferenceCategory>
 
+    <PreferenceCategory android:layout="@layout/preference_divider"/>
+
+    <PreferenceCategory android:title="@string/pref_other">
+        <Preference android:key="pref_backup"
+            android:title="@string/pref_backup"
+            android:summary="@string/pref_backup_explain"/>
+    </PreferenceCategory>
     <!--
     <PreferenceCategory android:layout="@layout/preference_divider"/>
 
diff --git a/src/org/thoughtcrime/securesms/connect/DcHelper.java b/src/org/thoughtcrime/securesms/connect/DcHelper.java
index 835108f3d..38a93343d 100644
--- a/src/org/thoughtcrime/securesms/connect/DcHelper.java
+++ b/src/org/thoughtcrime/securesms/connect/DcHelper.java
@@ -23,6 +23,11 @@ public class DcHelper {
     public static final String CONFIG_SELF_AVATAR = "selfavatar";
     public static final String CONFIG_E2EE_ENABLED = "e2ee_enabled";
     public static final String CONFIG_QR_OVERLAY_LOGO = "qr_overlay_logo";
+    public static final String CONFIG_INBOX_WATCH = "inbox_watch";
+    public static final String CONFIG_SENTBOX_WATCH = "sentbox_watch";
+    public static final String CONFIG_MVBOX_WATCH = "mvbox_watch";
+    public static final String CONFIG_MVBOX_MOVE = "mvbox_move";
+    public static final String CONFIG_SHOW_EMAILS = "show_emails";
 
     public static ApplicationDcContext getContext(Context context) {
         return ApplicationContext.getInstance(context).dcContext;
diff --git a/src/org/thoughtcrime/securesms/preferences/AdvancedPreferenceFragment.java b/src/org/thoughtcrime/securesms/preferences/AdvancedPreferenceFragment.java
index 7e8afd6af..b8cfb6135 100644
--- a/src/org/thoughtcrime/securesms/preferences/AdvancedPreferenceFragment.java
+++ b/src/org/thoughtcrime/securesms/preferences/AdvancedPreferenceFragment.java
@@ -20,15 +20,17 @@ import com.b44t.messenger.DcEventCenter;
 import org.thoughtcrime.securesms.ApplicationPreferencesActivity;
 import org.thoughtcrime.securesms.LogViewActivity;
 import org.thoughtcrime.securesms.R;
-import org.thoughtcrime.securesms.connect.ApplicationDcContext;
-import org.thoughtcrime.securesms.connect.DcHelper;
 import org.thoughtcrime.securesms.permissions.Permissions;
-import org.thoughtcrime.securesms.preferences.widgets.ListPreferenceWithSummary;
 import org.thoughtcrime.securesms.util.ScreenLockUtil;
 import org.thoughtcrime.securesms.util.Util;
 import org.thoughtcrime.securesms.util.views.ProgressDialog;
 
 import static android.app.Activity.RESULT_OK;
+import static org.thoughtcrime.securesms.connect.DcHelper.CONFIG_E2EE_ENABLED;
+import static org.thoughtcrime.securesms.connect.DcHelper.CONFIG_INBOX_WATCH;
+import static org.thoughtcrime.securesms.connect.DcHelper.CONFIG_MVBOX_MOVE;
+import static org.thoughtcrime.securesms.connect.DcHelper.CONFIG_MVBOX_WATCH;
+import static org.thoughtcrime.securesms.connect.DcHelper.CONFIG_SENTBOX_WATCH;
 
 
 public class AdvancedPreferenceFragment extends ListSummaryPreferenceFragment
@@ -36,11 +38,8 @@ public class AdvancedPreferenceFragment extends ListSummaryPreferenceFragment
 {
   private static final String TAG = AdvancedPreferenceFragment.class.getSimpleName();
 
-  private static final int REQUEST_CODE_CONFIRM_CREDENTIALS_BACKUP = ScreenLockUtil.REQUEST_CODE_CONFIRM_CREDENTIALS + 1;
 
-  private static final int REQUEST_CODE_CONFIRM_CREDENTIALS_KEYS = REQUEST_CODE_CONFIRM_CREDENTIALS_BACKUP + 1;
 
-  private ApplicationDcContext dcContext;
 
   CheckBoxPreference preferE2eeCheckbox;
   CheckBoxPreference inboxWatchCheckbox;
@@ -52,9 +51,6 @@ public class AdvancedPreferenceFragment extends ListSummaryPreferenceFragment
   public void onCreate(Bundle paramBundle) {
     super.onCreate(paramBundle);
 
-    dcContext = DcHelper.getContext(getContext());
-    dcContext.eventCenter.addObserver(this, DcContext.DC_EVENT_IMEX_PROGRESS);
-
     Preference sendAsm = this.findPreference("pref_send_autocrypt_setup_message");
     sendAsm.setOnPreferenceClickListener(new SendAsmListener());
 
@@ -63,29 +59,26 @@ public class AdvancedPreferenceFragment extends ListSummaryPreferenceFragment
 
     inboxWatchCheckbox = (CheckBoxPreference) this.findPreference("pref_inbox_watch");
     inboxWatchCheckbox.setOnPreferenceChangeListener((preference, newValue) ->
-      handleImapCheck(preference, newValue, "inbox_watch")
+      handleImapCheck(preference, newValue, CONFIG_INBOX_WATCH)
     );
 
     sentboxWatchCheckbox = (CheckBoxPreference) this.findPreference("pref_sentbox_watch");
     sentboxWatchCheckbox.setOnPreferenceChangeListener((preference, newValue) ->
-      handleImapCheck(preference, newValue, "sentbox_watch")
+      handleImapCheck(preference, newValue, CONFIG_SENTBOX_WATCH)
     );
 
     mvboxWatchCheckbox = (CheckBoxPreference) this.findPreference("pref_mvbox_watch");
     mvboxWatchCheckbox.setOnPreferenceChangeListener((preference, newValue) ->
-      handleImapCheck(preference, newValue, "mvbox_watch")
+      handleImapCheck(preference, newValue, CONFIG_MVBOX_WATCH)
     );
 
     mvboxMoveCheckbox = (CheckBoxPreference) this.findPreference("pref_mvbox_move");
     mvboxMoveCheckbox.setOnPreferenceChangeListener((preference, newValue) -> {
       boolean enabled = (Boolean) newValue;
-      dcContext.setConfigInt("mvbox_move", enabled? 1 : 0);
+      dcContext.setConfigInt(CONFIG_MVBOX_MOVE, enabled? 1 : 0);
       return true;
     });
 
-    Preference backup = this.findPreference("pref_backup");
-    backup.setOnPreferenceClickListener(new BackupListener());
-
     Preference manageKeys = this.findPreference("pref_manage_keys");
     manageKeys.setOnPreferenceClickListener(new ManageKeysListener());
 
@@ -113,12 +106,6 @@ public class AdvancedPreferenceFragment extends ListSummaryPreferenceFragment
 
   }
 
-  @Override
-  public void onDestroy() {
-    dcContext.eventCenter.removeObservers(this);
-    super.onDestroy();
-  }
-
   @Override
   public void onCreatePreferences(@Nullable Bundle savedInstanceState, String rootKey) {
     addPreferencesFromResource(R.xml.preferences_advanced);
@@ -129,22 +116,18 @@ public class AdvancedPreferenceFragment extends ListSummaryPreferenceFragment
     super.onResume();
     ((ApplicationPreferencesActivity) getActivity()).getSupportActionBar().setTitle(R.string.menu_advanced);
 
-    preferE2eeCheckbox.setChecked(0!=dcContext.getConfigInt("e2ee_enabled"));
-    inboxWatchCheckbox.setChecked(0!=dcContext.getConfigInt("inbox_watch"));
-    sentboxWatchCheckbox.setChecked(0!=dcContext.getConfigInt("sentbox_watch"));
-    mvboxWatchCheckbox.setChecked(0!=dcContext.getConfigInt("mvbox_watch"));
-    mvboxMoveCheckbox.setChecked(0!=dcContext.getConfigInt("mvbox_move"));
+    preferE2eeCheckbox.setChecked(0!=dcContext.getConfigInt(CONFIG_E2EE_ENABLED));
+    inboxWatchCheckbox.setChecked(0!=dcContext.getConfigInt(CONFIG_INBOX_WATCH));
+    sentboxWatchCheckbox.setChecked(0!=dcContext.getConfigInt(CONFIG_SENTBOX_WATCH));
+    mvboxWatchCheckbox.setChecked(0!=dcContext.getConfigInt(CONFIG_MVBOX_WATCH));
+    mvboxMoveCheckbox.setChecked(0!=dcContext.getConfigInt(CONFIG_MVBOX_MOVE));
   }
 
   @Override
   public void onActivityResult(int requestCode, int resultCode, Intent data) {
     super.onActivityResult(requestCode, resultCode, data);
-      if (resultCode == RESULT_OK) {
-        if (requestCode == REQUEST_CODE_CONFIRM_CREDENTIALS_BACKUP) {
-          performBackup();
-        } else if (requestCode == REQUEST_CODE_CONFIRM_CREDENTIALS_KEYS) {
+      if (resultCode == RESULT_OK && requestCode == REQUEST_CODE_CONFIRM_CREDENTIALS_KEYS) {
           exportKeys();
-        }
       } else {
         Toast.makeText(getActivity(), R.string.screenlock_authentication_failed, Toast.LENGTH_SHORT).show();
       }
@@ -233,42 +216,14 @@ public class AdvancedPreferenceFragment extends ListSummaryPreferenceFragment
     @Override
     public boolean onPreferenceChange(final Preference preference, Object newValue) {
       boolean enabled = (Boolean) newValue;
-      dcContext.setConfigInt("e2ee_enabled", enabled? 1 : 0);
+      dcContext.setConfigInt(CONFIG_E2EE_ENABLED, enabled? 1 : 0);
       return true;
     }
   }
 
   /***********************************************************************************************
-   * Import/Export
+   * Key Import/Export
    **********************************************************************************************/
-
-  private class BackupListener implements Preference.OnPreferenceClickListener {
-    @Override
-    public boolean onPreferenceClick(Preference preference) {
-      boolean result = ScreenLockUtil.applyScreenLock(getActivity(), REQUEST_CODE_CONFIRM_CREDENTIALS_BACKUP);
-      if (!result) {
-        performBackup();
-      }
-      return true;
-    }
-  }
-
-  private void performBackup() {
-    Permissions.with(getActivity())
-        .request(Manifest.permission.WRITE_EXTERNAL_STORAGE, Manifest.permission.READ_EXTERNAL_STORAGE)
-        .ifNecessary()
-        .withRationaleDialog(getActivity().getString(R.string.perm_explain_need_for_storage_access), R.drawable.ic_folder_white_48dp)
-        .onAllGranted(() -> {
-          new AlertDialog.Builder(getActivity())
-              .setTitle(R.string.pref_backup)
-              .setMessage(R.string.pref_backup_export_explain)
-              .setNegativeButton(android.R.string.cancel, null)
-              .setPositiveButton(R.string.pref_backup_export_start_button, (dialogInterface, i) -> startImex(DcContext.DC_IMEX_EXPORT_BACKUP))
-              .show();
-        })
-        .execute();
-  }
-
   private class ManageKeysListener implements Preference.OnPreferenceClickListener {
     @Override
     public boolean onPreferenceClick(Preference preference) {
@@ -315,67 +270,4 @@ public class AdvancedPreferenceFragment extends ListSummaryPreferenceFragment
         })
         .execute();
   }
-
-  private ProgressDialog progressDialog = null;
-  private int            progressWhat = 0;
-  private String         imexDir = "";
-  private void startImex(int what)
-  {
-    if( progressDialog!=null ) {
-      progressDialog.dismiss();
-      progressDialog = null;
-    }
-    progressWhat = what;
-    progressDialog = new ProgressDialog(getActivity());
-    progressDialog.setMessage(getActivity().getString(R.string.one_moment));
-    progressDialog.setCanceledOnTouchOutside(false);
-    progressDialog.setCancelable(false);
-    progressDialog.setButton(DialogInterface.BUTTON_NEGATIVE, getActivity().getString(android.R.string.cancel), (dialog, which) -> dcContext.stopOngoingProcess());
-    progressDialog.show();
-
-    imexDir = dcContext.getImexDir().getAbsolutePath();
-    dcContext.captureNextError();
-    dcContext.imex(progressWhat, imexDir);
-  }
-
-  @Override
-  public void handleEvent(int eventId, Object data1, Object data2) {
-    if (eventId== DcContext.DC_EVENT_IMEX_PROGRESS) {
-      long progress = (Long)data1;
-      if (progress==0/*error/aborted*/) {
-        dcContext.endCaptureNextError();
-        progressDialog.dismiss();
-        progressDialog = null;
-        if (dcContext.hasCapturedError()) {
-          new AlertDialog.Builder(getActivity())
-              .setMessage(dcContext.getCapturedError())
-              .setPositiveButton(android.R.string.ok, null)
-              .show();
-        }
-      }
-      else if (progress<1000/*progress in permille*/) {
-        int percent = (int)progress / 10;
-        progressDialog.setMessage(getResources().getString(R.string.one_moment)+String.format(" %d%%", percent));
-      }
-      else if (progress==1000/*done*/) {
-        dcContext.endCaptureNextError();
-        progressDialog.dismiss();
-        progressDialog = null;
-        String msg = "";
-        if (progressWhat==DcContext.DC_IMEX_EXPORT_BACKUP) {
-          msg = getActivity().getString(R.string.pref_backup_written_to_x, imexDir);
-        }
-        else if (progressWhat==DcContext.DC_IMEX_EXPORT_SELF_KEYS) {
-          msg = getActivity().getString(R.string.pref_managekeys_secret_keys_exported_to_x, imexDir);
-        }
-        else if (progressWhat==DcContext.DC_IMEX_IMPORT_SELF_KEYS) {
-          msg = getActivity().getString(R.string.pref_managekeys_secret_keys_imported_from_x, imexDir);
-        }
-        new AlertDialog.Builder(getActivity())
-            .setMessage(msg)
-            .setPositiveButton(android.R.string.ok, null)
-            .show();
-      }
-    }
-  }
 }
diff --git a/src/org/thoughtcrime/securesms/preferences/ChatsPreferenceFragment.java b/src/org/thoughtcrime/securesms/preferences/ChatsPreferenceFragment.java
index 99c3720a8..cb110197a 100644
--- a/src/org/thoughtcrime/securesms/preferences/ChatsPreferenceFragment.java
+++ b/src/org/thoughtcrime/securesms/preferences/ChatsPreferenceFragment.java
@@ -1,32 +1,32 @@
 package org.thoughtcrime.securesms.preferences;
 
+import android.Manifest;
 import android.content.Context;
+import android.content.Intent;
 import android.os.Bundle;
 import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
 import android.support.v7.app.AlertDialog;
-import android.support.v7.preference.CheckBoxPreference;
-import android.support.v7.preference.EditTextPreference;
 import android.support.v7.preference.ListPreference;
 import android.support.v7.preference.Preference;
-import android.util.Log;
 import android.widget.Toast;
 
 import com.b44t.messenger.DcContext;
 
 import org.thoughtcrime.securesms.ApplicationPreferencesActivity;
 import org.thoughtcrime.securesms.R;
-import org.thoughtcrime.securesms.connect.ApplicationDcContext;
-import org.thoughtcrime.securesms.connect.DcHelper;
 import org.thoughtcrime.securesms.permissions.Permissions;
 import org.thoughtcrime.securesms.preferences.widgets.ListPreferenceWithSummary;
 import org.thoughtcrime.securesms.util.Prefs;
+import org.thoughtcrime.securesms.util.ScreenLockUtil;
 import org.thoughtcrime.securesms.util.Util;
 
+import static android.app.Activity.RESULT_OK;
+import static org.thoughtcrime.securesms.connect.DcHelper.CONFIG_SHOW_EMAILS;
+
 public class ChatsPreferenceFragment extends ListSummaryPreferenceFragment {
   private static final String TAG = ChatsPreferenceFragment.class.getSimpleName();
 
-  private ApplicationDcContext dcContext;
 
   ListPreferenceWithSummary showEmails;
 
@@ -35,21 +35,23 @@ public class ChatsPreferenceFragment extends ListSummaryPreferenceFragment {
   @Override
   public void onCreate(Bundle paramBundle) {
     super.onCreate(paramBundle);
-    dcContext = DcHelper.getContext(getContext());
 
     findPreference(Prefs.MESSAGE_BODY_TEXT_SIZE_PREF)
-        .setOnPreferenceChangeListener(new ListSummaryListener());
+            .setOnPreferenceChangeListener(new ListSummaryListener());
 
     findPreference("pref_compression")
-        .setOnPreferenceChangeListener(new ListSummaryListener());
+            .setOnPreferenceChangeListener(new ListSummaryListener());
 
     showEmails = (ListPreferenceWithSummary) this.findPreference("pref_show_emails");
     showEmails.setOnPreferenceChangeListener((preference, newValue) -> {
       updateListSummary(preference, newValue);
-      dcContext.setConfigInt("show_emails", Util.objectToInt(newValue));
+      dcContext.setConfigInt(CONFIG_SHOW_EMAILS, Util.objectToInt(newValue));
       return true;
     });
 
+    Preference backup = this.findPreference("pref_backup");
+    backup.setOnPreferenceClickListener(new BackupListener());
+
 //    trimEnabledCheckbox = (CheckBoxPreference) findPreference("pref_trim_threads");
 //    trimEnabledCheckbox.setOnPreferenceChangeListener(new TrimEnabledListener());
 //
@@ -59,6 +61,7 @@ public class ChatsPreferenceFragment extends ListSummaryPreferenceFragment {
 //        .setOnPreferenceClickListener(new TrimNowClickListener());
 
     initializeListSummary((ListPreference) findPreference(Prefs.MESSAGE_BODY_TEXT_SIZE_PREF));
+
   }
 
   @Override
@@ -73,7 +76,7 @@ public class ChatsPreferenceFragment extends ListSummaryPreferenceFragment {
 
     initializeListSummary((ListPreferenceWithSummary) findPreference("pref_compression"));
 
-    String value = Integer.toString(dcContext.getConfigInt("show_emails"));
+    String value = Integer.toString(dcContext.getConfigInt("pref_show_emails"));
     showEmails.setValue(value);
     updateListSummary(showEmails, value);
 
@@ -81,13 +84,18 @@ public class ChatsPreferenceFragment extends ListSummaryPreferenceFragment {
   }
 
   @Override
-  public void onDestroy() {
-    super.onDestroy();
+  public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
+    Permissions.onRequestPermissionsResult(this, requestCode, permissions, grantResults);
   }
 
   @Override
-  public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
-    Permissions.onRequestPermissionsResult(this, requestCode, permissions, grantResults);
+  public void onActivityResult(int requestCode, int resultCode, Intent data) {
+    super.onActivityResult(requestCode, resultCode, data);
+    if (resultCode == RESULT_OK && requestCode == REQUEST_CODE_CONFIRM_CREDENTIALS_BACKUP) {
+      performBackup();
+    } else {
+      Toast.makeText(getActivity(), R.string.screenlock_authentication_failed, Toast.LENGTH_SHORT).show();
+    }
   }
 
 //  private class TrimEnabledListener implements Preference.OnPreferenceChangeListener {
@@ -151,4 +159,35 @@ public class ChatsPreferenceFragment extends ListSummaryPreferenceFragment {
   public static CharSequence getSummary(Context context) {
     return null;
   }
+
+  /***********************************************************************************************
+   * Backup
+   **********************************************************************************************/
+
+  private class BackupListener implements Preference.OnPreferenceClickListener {
+    @Override
+    public boolean onPreferenceClick(Preference preference) {
+      boolean result = ScreenLockUtil.applyScreenLock(getActivity(), REQUEST_CODE_CONFIRM_CREDENTIALS_BACKUP);
+      if (!result) {
+        performBackup();
+      }
+      return true;
+    }
+  }
+
+  private void performBackup() {
+    Permissions.with(getActivity())
+            .request(Manifest.permission.WRITE_EXTERNAL_STORAGE, Manifest.permission.READ_EXTERNAL_STORAGE)
+            .ifNecessary()
+            .withRationaleDialog(getActivity().getString(R.string.perm_explain_need_for_storage_access), R.drawable.ic_folder_white_48dp)
+            .onAllGranted(() -> {
+              new AlertDialog.Builder(getActivity())
+                      .setTitle(R.string.pref_backup)
+                      .setMessage(R.string.pref_backup_export_explain)
+                      .setNegativeButton(android.R.string.cancel, null)
+                      .setPositiveButton(R.string.pref_backup_export_start_button, (dialogInterface, i) -> startImex(DcContext.DC_IMEX_EXPORT_BACKUP))
+                      .show();
+            })
+            .execute();
+  }
 }
diff --git a/src/org/thoughtcrime/securesms/preferences/ListSummaryPreferenceFragment.java b/src/org/thoughtcrime/securesms/preferences/ListSummaryPreferenceFragment.java
index a6929d93f..1c667e834 100644
--- a/src/org/thoughtcrime/securesms/preferences/ListSummaryPreferenceFragment.java
+++ b/src/org/thoughtcrime/securesms/preferences/ListSummaryPreferenceFragment.java
@@ -1,14 +1,40 @@
 package org.thoughtcrime.securesms.preferences;
 
 
+import android.content.DialogInterface;
+import android.os.Bundle;
+import android.support.v7.app.AlertDialog;
 import android.support.v7.preference.ListPreference;
 import android.support.v7.preference.Preference;
 
+import com.b44t.messenger.DcContext;
+import com.b44t.messenger.DcEventCenter;
+
 import org.thoughtcrime.securesms.R;
+import org.thoughtcrime.securesms.connect.ApplicationDcContext;
+import org.thoughtcrime.securesms.connect.DcHelper;
+import org.thoughtcrime.securesms.util.ScreenLockUtil;
+import org.thoughtcrime.securesms.util.views.ProgressDialog;
 
 import java.util.Arrays;
 
-public abstract class ListSummaryPreferenceFragment extends CorrectedPreferenceFragment {
+public abstract class ListSummaryPreferenceFragment extends CorrectedPreferenceFragment implements DcEventCenter.DcEventDelegate {
+  protected static final int REQUEST_CODE_CONFIRM_CREDENTIALS_BACKUP = ScreenLockUtil.REQUEST_CODE_CONFIRM_CREDENTIALS + 1;
+  protected static final int REQUEST_CODE_CONFIRM_CREDENTIALS_KEYS = REQUEST_CODE_CONFIRM_CREDENTIALS_BACKUP + 1;
+  protected ApplicationDcContext dcContext;
+
+  @Override
+  public void onCreate(Bundle icicle) {
+    super.onCreate(icicle);
+    dcContext = DcHelper.getContext(getContext());
+    dcContext.eventCenter.addObserver(DcContext.DC_EVENT_IMEX_PROGRESS, this);
+  }
+
+  @Override
+  public void onDestroy() {
+    dcContext.eventCenter.removeObservers(this);
+    super.onDestroy();
+  }
 
   protected class ListSummaryListener implements Preference.OnPreferenceChangeListener {
     @Override
@@ -30,4 +56,68 @@ public abstract class ListSummaryPreferenceFragment extends CorrectedPreferenceF
   protected void initializeListSummary(ListPreference pref) {
     pref.setSummary(pref.getEntry());
   }
+
+  protected ProgressDialog progressDialog = null;
+  protected int            progressWhat = 0;
+  protected String         imexDir = "";
+  protected void startImex(int what)
+  {
+    if( progressDialog!=null ) {
+      progressDialog.dismiss();
+      progressDialog = null;
+    }
+    progressWhat = what;
+    progressDialog = new ProgressDialog(getActivity());
+    progressDialog.setMessage(getActivity().getString(R.string.one_moment));
+    progressDialog.setCanceledOnTouchOutside(false);
+    progressDialog.setCancelable(false);
+    progressDialog.setButton(DialogInterface.BUTTON_NEGATIVE, getActivity().getString(android.R.string.cancel), (dialog, which) -> dcContext.stopOngoingProcess());
+    progressDialog.show();
+
+    imexDir = dcContext.getImexDir().getAbsolutePath();
+    dcContext.captureNextError();
+    dcContext.imex(progressWhat, imexDir);
+  }
+
+  @Override
+  public void handleEvent(int eventId, Object data1, Object data2) {
+    if (eventId== DcContext.DC_EVENT_IMEX_PROGRESS) {
+      long progress = (Long)data1;
+      if (progress==0/*error/aborted*/) {
+        dcContext.endCaptureNextError();
+        progressDialog.dismiss();
+        progressDialog = null;
+        if (dcContext.hasCapturedError()) {
+          new AlertDialog.Builder(getActivity())
+                  .setMessage(dcContext.getCapturedError())
+                  .setPositiveButton(android.R.string.ok, null)
+                  .show();
+        }
+      }
+      else if (progress<1000/*progress in permille*/) {
+        int percent = (int)progress / 10;
+        progressDialog.setMessage(getResources().getString(R.string.one_moment)+String.format(" %d%%", percent));
+      }
+      else if (progress==1000/*done*/) {
+        dcContext.endCaptureNextError();
+        progressDialog.dismiss();
+        progressDialog = null;
+        String msg = "";
+        if (progressWhat==DcContext.DC_IMEX_EXPORT_BACKUP) {
+          msg = getActivity().getString(R.string.pref_backup_written_to_x, imexDir);
+        }
+        else if (progressWhat==DcContext.DC_IMEX_EXPORT_SELF_KEYS) {
+          msg = getActivity().getString(R.string.pref_managekeys_secret_keys_exported_to_x, imexDir);
+        }
+        else if (progressWhat==DcContext.DC_IMEX_IMPORT_SELF_KEYS) {
+          msg = getActivity().getString(R.string.pref_managekeys_secret_keys_imported_from_x, imexDir);
+        }
+        new AlertDialog.Builder(getActivity())
+                .setMessage(msg)
+                .setPositiveButton(android.R.string.ok, null)
+                .show();
+      }
+    }
+  }
+
 }