fixed spelling mistakes

app/src/main/java/org/kontalk/service/DownloadListener.java

@@ -47,10 +47,10 @@ public interface DownloadListener {
     void completed(String url, String mime, File destination);
 
     /**
-     * Called if an error occured while download.
+     * Called if an error occurred while download.
      * @param url
      * @param destination
-     * @param exc the exception occured
+     * @param exc the exception occurred
      */
     void error(String url, File destination, Throwable exc);
 

app/src/main/java/org/kontalk/service/msgcenter/MessageCenterService.java

@@ -1045,7 +1045,7 @@ public boolean joinTimeout(long millis) {
             try {
                 // we must wait for the connection to actually close
                 join(millis);
-                // this won't send the last sm ack, preventing another interruptable zone
+                // this won't send the last sm ack, preventing another interruptible zone
                 mConn.suspendSmAck();
                 interrupt();
                 return !isAlive();

app/src/main/java/org/kontalk/sync/SyncProcedure.java

@@ -161,9 +161,9 @@ public synchronized void onPresence(PresenceEvent event) {
                     item.presence = true;
                     // increment presence count
                     mPresenceCount++;
-                    // check user existance (only if subscription is "both")
+                    // check user existence (only if subscription is "both")
                     if (!item.matched && event.subscribedFrom && event.subscribedTo) {
-                        // verify actual user existance through last activity
+                        // verify actual user existence through last activity
                         String lastActivityId = StringUtils.randomString(6);
                         requestLastActivity(item.from, lastActivityId);
                         mNotMatched.add(lastActivityId);
@@ -246,7 +246,7 @@ public synchronized void onBlocklist(BlocklistEvent event) {
         }
     }
 
-    /** Last activity (for user existance verification). */
+    /** Last activity (for user existence verification). */
     @Subscribe(threadMode = ThreadMode.BACKGROUND)
     public synchronized void onLastActivity(LastActivityEvent event) {
         if (mNotMatched.contains(event.id)) {

app/src/main/java/org/kontalk/ui/AccountAuthenticatorActionBarActivity.java

@@ -50,7 +50,7 @@ public final void setAccountAuthenticatorResult(Bundle result) {
     }
 
     /**
-     * Retreives the AccountAuthenticatorResponse from either the intent of the icicle, if the
+     * Retrieves the AccountAuthenticatorResponse from either the intent of the icicle, if the
      * icicle is non-zero.
      * @param icicle the save instance data of this Activity, may be null
      */

app/src/main/java/org/kontalk/ui/ComposeMessageFragment.java

@@ -402,7 +402,7 @@ protected boolean handleActionViewConversation(Uri uri, Bundle args) {
 
     @Override
     protected void onArgumentsProcessed() {
-        // non existant thread - check for not synced contact
+        // non existent thread - check for not synced contact
         if (getThreadId() <= 0 && mConversation != null && mUserJID != null) {
             Contact contact = mConversation.getContact();
             if ((contact == null || !contact.isRegistered()) && mUserPhone != null) {
@@ -774,7 +774,7 @@ void setPrivacy(@NonNull Context ctx, PrivacyCommand action) {
                 return;
         }
 
-        // temporarly disable peer observer because the next call will write to the threads table
+        // temporarily disable peer observer because the next call will write to the threads table
         unregisterPeerObserver();
 
         // mark request as pending accepted

app/src/main/java/org/kontalk/ui/MessagingNotification.java

@@ -323,7 +323,7 @@ public static void enable() {
         sDisabled = false;
     }
 
-    /** Temporarly disable all notifications. */
+    /** Temporarily disable all notifications. */
     public static void disable() {
         sDisabled = true;
     }

app/src/main/java/org/kontalk/ui/NumberValidation.java

@@ -981,7 +981,7 @@ public void onInput(@NonNull MaterialDialog dialog, CharSequence input) {
 
     @Subscribe(threadMode = ThreadMode.MAIN)
     public void onRetrieveKeyError(RetrieveKeyError event) {
-        // FIXME maybe a somewhat more detailed explaination
+        // FIXME maybe a somewhat more detailed explanation
         onGenericError(event.exception);
     }
 

app/src/main/java/org/kontalk/ui/SendIntentReceiver.java

@@ -34,7 +34,7 @@
 
 
 /**
- * Static utilities used by activites that can receive ACTION_SEND intents,
+ * Static utilities used by activities that can receive ACTION_SEND intents,
  * namely {@link ConversationsActivity} (indirectly) and {@link ComposeMessage}.
  * Not the best solution, but it was too complicated to be used as parent class.
  */