Added Auto Scroll (#3912)

* Fixed #3910 Truncated Spinners

* Added AutoScroll for Leaderboard Rank

* Revert Irrelevant Change

* Fixed Bounce Back Issue

* Fixed Incorrect UserRank Issue on Rotation

* Fixed Overlapping issue

* As per java convention

app/src/main/AndroidManifest.xml

@@ -138,6 +138,7 @@
 
         <activity
             android:name=".profile.ProfileActivity"
+            android:configChanges="orientation|screenSize|keyboard"
             android:label="@string/Profile" />
 
         <activity

app/src/main/java/fr/free/nrw/commons/profile/leaderboard/LeaderboardFragment.java

@@ -13,6 +13,7 @@ import android.view.ViewGroup;
 import android.widget.AdapterView;
 import android.widget.AdapterView.OnItemSelectedListener;
 import android.widget.ArrayAdapter;
+import android.widget.Button;
 import android.widget.ProgressBar;
 import android.widget.Spinner;
 import androidx.lifecycle.ViewModelProvider;
@@ -50,6 +51,9 @@ public class LeaderboardFragment extends CommonsDaggerSupportFragment {
     @BindView(R.id.duration_spinner)
     Spinner durationSpinner;
 
+    @BindView(R.id.scroll)
+    Button scrollButton;
+
     @Inject
     SessionManager sessionManager;
 
@@ -89,6 +93,16 @@ public class LeaderboardFragment extends CommonsDaggerSupportFragment {
      */
     private int offset = START_OFFSET;
 
+    /**
+     * Set initial User Rank to 0
+     */
+    private int userRank;
+
+    /**
+     * This variable represents if user wants to scroll to his rank or not
+     */
+    private boolean scrollToRank;
+
     @Override
     public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
         View rootView = inflater.inflate(R.layout.fragment_leaderboard, container, false);
@@ -140,6 +154,8 @@ public class LeaderboardFragment extends CommonsDaggerSupportFragment {
             }
         });
 
+        scrollButton.setOnClickListener(view -> scrollToUserRank());
+
         return rootView;
     }
 
@@ -147,12 +163,29 @@ public class LeaderboardFragment extends CommonsDaggerSupportFragment {
      * Refreshes the leaderboard list
      */
     private void refreshLeaderboard() {
+        scrollToRank = false;
         if (viewModel != null) {
             viewModel.refresh(duration, category, limit, offset);
             setLeaderboard(duration, category, limit, offset);
         }
     }
 
+    /**
+     * Performs Auto Scroll to the User's Rank
+     * We use userRank+1 to load one extra user and prevent overlapping of my rank button
+     */
+    private void scrollToUserRank() {
+        if (Objects.requireNonNull(leaderboardListRecyclerView.getAdapter()).getItemCount() > userRank + 1) {
+            leaderboardListRecyclerView.smoothScrollToPosition(userRank + 1);
+        } else {
+            if (viewModel != null) {
+                viewModel.refresh(duration, category, userRank + 1, 0);
+                setLeaderboard(duration, category, userRank + 1, 0);
+                scrollToRank = true;
+            }
+        }
+    }
+
     /**
      * Set the spinners for the leaderboard filters
      */
@@ -183,6 +216,7 @@ public class LeaderboardFragment extends CommonsDaggerSupportFragment {
                     .subscribe(
                         response -> {
                             if (response != null && response.getStatus() == 200) {
+                                userRank = response.getRank();
                                 setViews(response, duration, category, limit, offset);
                             }
                         },
@@ -217,6 +251,9 @@ public class LeaderboardFragment extends CommonsDaggerSupportFragment {
                 showProgressBar();
             } else if (status.equalsIgnoreCase(LOADED)) {
                 hideProgressBar();
+                if (scrollToRank) {
+                    leaderboardListRecyclerView.smoothScrollToPosition(userRank + 1);
+                }
             }
         });
     }
@@ -229,6 +266,7 @@ public class LeaderboardFragment extends CommonsDaggerSupportFragment {
             progressBar.setVisibility(View.GONE);
             categorySpinner.setVisibility(View.VISIBLE);
             durationSpinner.setVisibility(View.VISIBLE);
+            scrollButton.setVisibility(View.VISIBLE);
             leaderboardListRecyclerView.setVisibility(View.VISIBLE);
         }
     }
@@ -240,6 +278,7 @@ public class LeaderboardFragment extends CommonsDaggerSupportFragment {
         if (progressBar != null) {
             progressBar.setVisibility(View.VISIBLE);
         }
+        scrollButton.setVisibility(View.INVISIBLE);
     }
 
     /**

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

@@ -43,6 +43,15 @@
     app:layout_constraintStart_toStartOf="parent"
     app:layout_constraintTop_toBottomOf="@+id/filters" />
 
+  <Button
+    android:text="@string/leaderboard_my_rank_button_text"
+    android:id="@+id/scroll"
+    android:layout_width="wrap_content"
+    android:layout_height="wrap_content"
+    app:layout_constraintBottom_toBottomOf="@+id/leaderboard_list"
+    app:layout_constraintEnd_toEndOf="parent"
+    app:layout_constraintStart_toStartOf="parent" />
+
   <ProgressBar
     android:id="@+id/progressBar"
     android:layout_width="match_parent"
@@ -53,4 +62,4 @@
     app:layout_constraintStart_toStartOf="parent"
     app:layout_constraintTop_toTopOf="@+id/leaderboard_list" />
 
-</androidx.constraintlayout.widget.ConstraintLayout>
+</androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/values/strings.xml

@@ -688,4 +688,5 @@ Upload your first media by tapping on the add button.</string>
   <string name="leaderboard_upload">Upload</string>
   <string name="leaderboard_nearby">Nearby</string>
   <string name="leaderboard_used">Used</string>
+  <string name="leaderboard_my_rank_button_text">My Rank</string>
 </resources>