issue-commons-app#3195: order contribution list refactored

Author: isnirp

app/src/main/java/fr/free/nrw/commons/contributions/ContributionComparator.java

@@ -0,0 +1,11 @@
+package fr.free.nrw.commons.contributions;
+
+import java.util.Comparator;
+
+public class ContributionComparator implements Comparator<Contribution> {
+
+  @Override
+  public int compare(Contribution c1, Contribution c2) {
+    return c1.dateUploaded.compareTo(c2.dateUploaded);
+  }
+}

app/src/main/java/fr/free/nrw/commons/contributions/ContributionsListFragment.java

@@ -21,6 +21,7 @@
 import com.google.android.material.floatingactionbutton.FloatingActionButton;
 
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.List;
 
 import javax.inject.Inject;
@@ -185,6 +186,8 @@ public void showNoContributionsUI(boolean shouldShow) {
     }
 
     public void setContributions(List<Contribution> contributionList) {
+        Collections.sort(contributionList, new ContributionComparator());
+        Collections.reverse(contributionList);
         this.contributions.clear();
         this.contributions.addAll(contributionList);
         adapter.setContributions(contributions);