Don't modify UI from email-sending thread

CHANGELOG

@@ -1,5 +1,6 @@
 0.3.1
  * Fixed crash when clicking "Create new contact" button
+ * Fixed crash when sending email
  * Fixed occasional crashes when Bote connects to / disconnects from the network
  * Improved robustness and user feedback for email checking
  * Added "Copy to clipboard" button to identities and contacts

app/src/main/java/i2p/bote/android/EmailListActivity.java

@@ -41,12 +41,14 @@ import i2p.bote.android.service.Init.RouterChoice;
 import i2p.bote.android.util.MoveToDialogFragment;
 import i2p.bote.fileencryption.PasswordCacheListener;
 import i2p.bote.folder.EmailFolder;
+import i2p.bote.folder.FolderListener;
 import i2p.bote.network.NetworkStatusListener;
 
 public class EmailListActivity extends ActionBarActivity implements
         EmailListFragment.OnEmailSelectedListener,
         MoveToDialogFragment.MoveToDialogListener,
         PasswordCacheListener,
+        FolderListener,
         NetworkStatusListener {
     private I2PAndroidHelper mHelper;
     private RouterChoice mRouterChoice;
@@ -108,7 +110,7 @@ public class EmailListActivity extends ActionBarActivity implements
 
         // Set the list of folders
         // TODO: This is slow, needs a loader
-        mFolderAdapter.setData(I2PBote.getInstance().getEmailFolders());
+        mFolderAdapter.setData(I2PBote.getInstance().getEmailFolders(), this);
 
         // Set a custom shadow that overlays the main content when the drawer opens
         mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow, GravityCompat.START);
@@ -416,6 +418,38 @@ public class EmailListActivity extends ActionBarActivity implements
         });
     }
 
+    // FolderListener
+
+    @Override
+    public void elementAdded(String messageId) {
+        runOnUiThread(new Runnable() {
+            @Override
+            public void run() {
+                mFolderAdapter.notifyDataSetChanged();
+            }
+        });
+    }
+
+    @Override
+    public void elementUpdated() {
+        runOnUiThread(new Runnable() {
+            @Override
+            public void run() {
+                mFolderAdapter.notifyDataSetChanged();
+            }
+        });
+    }
+
+    @Override
+    public void elementRemoved(String messageId) {
+        runOnUiThread(new Runnable() {
+            @Override
+            public void run() {
+                mFolderAdapter.notifyDataSetChanged();
+            }
+        });
+    }
+
     // NetworkStatusListener
 
     @Override

app/src/main/java/i2p/bote/android/FolderListAdapter.java

@@ -14,7 +14,7 @@ import android.widget.ArrayAdapter;
 import android.widget.ImageView;
 import android.widget.TextView;
 
-public class FolderListAdapter extends ArrayAdapter<EmailFolder> implements FolderListener {
+public class FolderListAdapter extends ArrayAdapter<EmailFolder> {
     private final LayoutInflater mInflater;
 
     public FolderListAdapter(Context context) {
@@ -22,16 +22,16 @@ public class FolderListAdapter extends ArrayAdapter<EmailFolder> implements Fold
         mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
     }
 
-    public void setData(List<EmailFolder> folders) {
+    public void setData(List<EmailFolder> folders, FolderListener folderListener) {
         // Remove previous FolderListeners
         for (int i = 0; i < getCount(); i++) {
-            getItem(i).removeFolderListener(this);
+            getItem(i).removeFolderListener(folderListener);
         }
         clear();
         if (folders != null) {
             for (EmailFolder folder : folders) {
                 add(folder);
-                folder.addFolderListener(this);
+                folder.addFolderListener(folderListener);
             }
         }
     }
@@ -53,21 +53,4 @@ public class FolderListAdapter extends ArrayAdapter<EmailFolder> implements Fold
 
         return v;
     }
-
-    // FolderListener
-
-    @Override
-    public void elementAdded(String messageId) {
-        notifyDataSetChanged();
-    }
-
-    @Override
-    public void elementUpdated() {
-        notifyDataSetChanged();
-    }
-
-    @Override
-    public void elementRemoved(String messageId) {
-        notifyDataSetChanged();
-    }
 }