Refresh username in onResume and utilize imeAction.

app/src/main/java/org/thoughtcrime/securesms/profiles/edit/EditProfileFragment.java

@@ -132,6 +132,12 @@ public class EditProfileFragment extends LoggingFragment {
     initializeUsername();
   }
 
+  @Override
+  public void onResume() {
+    super.onResume();
+    viewModel.refreshUsername();
+  }
+
   @Override
   public void onSaveInstanceState(@NonNull Bundle outState) {
     outState.putByteArray(AVATAR_STATE, viewModel.getAvatarSnapshot());

app/src/main/java/org/thoughtcrime/securesms/profiles/edit/EditProfileViewModel.java

@@ -37,8 +37,6 @@ class EditProfileViewModel extends ViewModel {
     this.repository = repository;
     this.groupId    = groupId;
 
-    repository.getCurrentUsername(internalUsername::postValue);
-
     if (!hasInstanceState) {
       if (groupId != null) {
         repository.getCurrentDisplayName(originalDisplayName::setValue);
@@ -110,6 +108,10 @@ class EditProfileViewModel extends ViewModel {
     internalAvatar.setValue(avatar);
   }
 
+  public void refreshUsername() {
+    repository.getCurrentUsername(internalUsername::postValue);
+  }
+
   public void submitProfile(Consumer<EditProfileRepository.UploadResult> uploadResultConsumer) {
     ProfileName profileName = isGroup() ? ProfileName.EMPTY : internalProfileName.getValue();
     String      displayName = isGroup() ? givenName.getValue() : "";

app/src/main/java/org/thoughtcrime/securesms/usernames/username/UsernameEditFragment.java

@@ -2,9 +2,11 @@ package org.thoughtcrime.securesms.usernames.username;
 
 import android.os.Bundle;
 import android.text.TextUtils;
+import android.view.KeyEvent;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
+import android.view.inputmethod.EditorInfo;
 import android.widget.EditText;
 import android.widget.TextView;
 import android.widget.Toast;
@@ -65,6 +67,13 @@ public class UsernameEditFragment extends LoggingFragment {
         viewModel.onUsernameUpdated(text);
       }
     });
+    usernameInput.setOnEditorActionListener((v, actionId, event) -> {
+      if (actionId == EditorInfo.IME_ACTION_DONE) {
+        viewModel.onUsernameSubmitted(usernameInput.getText().toString());
+        return true;
+      }
+      return false;
+    });
   }
 
   private void onUiStateChanged(@NonNull UsernameEditViewModel.State state) {

app/src/main/res/layout/username_edit_fragment.xml

@@ -16,6 +16,9 @@
       android:layout_height="wrap_content"
       android:layout_marginTop="48dp"
       android:hint="@string/CreateProfileActivity__create_a_username"
+      android:imeOptions="actionDone"
+      android:inputType="text"
+      android:maxLines="1"
       app:layout_constraintEnd_toEndOf="parent"
       app:layout_constraintStart_toStartOf="parent"
       app:layout_constraintTop_toTopOf="parent" />