don't display context until fragment transition finished

mastodon/src/main/java/org/joinmastodon/android/fragments/ThreadFragment.java

@@ -52,7 +52,8 @@ import me.grishka.appkit.utils.V;
 public class ThreadFragment extends StatusListFragment implements ProvidesAssistContent {
 	protected Status mainStatus, updatedStatus;
 	private final HashMap<String, NeighborAncestryInfo> ancestryMap = new HashMap<>();
-	protected boolean contextInitiallyRendered;
+	private StatusContext result;
+	protected boolean contextInitiallyRendered, transitionFinished;
 
 	@Override
 	public void onCreate(Bundle savedInstanceState){
@@ -113,6 +114,12 @@ public class ThreadFragment extends StatusListFragment implements ProvidesAssist
 		return items;
 	}
 
+	@Override
+	public void onTransitionFinished() {
+		transitionFinished = true;
+		maybeApplyContext();
+	}
+
 	@Override
 	protected void doLoadData(int offset, int count){
 		if (refreshing) loadMainStatus();
@@ -120,7 +127,32 @@ public class ThreadFragment extends StatusListFragment implements ProvidesAssist
 				.setCallback(new SimpleCallback<>(this){
 					@Override
 					public void onSuccess(StatusContext result){
-						if (getContext() == null) return;
+						ThreadFragment.this.result = result;
+						maybeApplyContext();
+					}
+				})
+				.exec(accountID);
+	}
+
+	private void loadMainStatus() {
+		new GetStatusByID(mainStatus.id)
+				.setCallback(new Callback<>() {
+					@Override
+					public void onSuccess(Status status) {
+						if (getContext() == null || status == null) return;
+						updatedStatus = status;
+						// for the case that the context has already loaded (and the animation has
+						// already finished), falling back to applying it ourselves:
+						maybeApplyMainStatus();
+					}
+
+					@Override
+					public void onError(ErrorResponse error) {}
+				}).exec(accountID);
+	}
+
+	protected void maybeApplyContext() {
+		if (!transitionFinished || result == null || getContext() == null) return;
 		Map<String, Status> oldData = null;
 		if(refreshing){
 			oldData = new HashMap<>(data.size());
@@ -186,26 +218,8 @@ public class ThreadFragment extends StatusListFragment implements ProvidesAssist
 			// for the case that the main status has already finished loading
 			maybeApplyMainStatus();
 		}
-					}
-				})
-				.exec(accountID);
-	}
 
-	private void loadMainStatus() {
-		new GetStatusByID(mainStatus.id)
-				.setCallback(new Callback<>() {
-					@Override
-					public void onSuccess(Status status) {
-						if (getContext() == null || status == null) return;
-						updatedStatus = status;
-						// for the case that the context has already loaded (and the animation has
-						// already finished), falling back to applying it ourselves:
-						maybeApplyMainStatus();
-					}
-
-					@Override
-					public void onError(ErrorResponse error) {}
-				}).exec(accountID);
+		result = null;
 	}
 
 	protected Object maybeApplyMainStatus() {