Clear selection tracker

app/src/main/java/eu/faircode/email/ActivityBase.java

@@ -60,6 +60,7 @@ import androidx.lifecycle.LifecycleObserver;
 import androidx.lifecycle.LifecycleOwner;
 import androidx.lifecycle.OnLifecycleEvent;
 import androidx.preference.PreferenceManager;
+import androidx.recyclerview.selection.SelectionTracker;
 import androidx.recyclerview.widget.RecyclerView;
 
 import java.io.File;
@@ -811,6 +812,8 @@ abstract class ActivityBase extends AppCompatActivity implements SharedPreferenc
                     Class<?> type = field.getType();
                     if (View.class.isAssignableFrom(type) ||
                             Animator.class.isAssignableFrom(type) ||
+                            SelectionTracker.class.isAssignableFrom(type) ||
+                            SelectionTracker.SelectionPredicate.class.isAssignableFrom(type) ||
                             RecyclerView.Adapter.class.isAssignableFrom(type)) {
                         Log.i("Clearing " + f.getClass().getSimpleName() + ":" + field.getName());
                         field.setAccessible(true);

app/src/main/java/eu/faircode/email/FragmentMessages.java

@@ -3503,6 +3503,9 @@ public class FragmentMessages extends FragmentBase implements SharedPreferences.
     }
 
     private long[] getSelection() {
+        if (selectionTracker == null)
+            return new long[0];
+
         Selection<Long> selection = selectionTracker.getSelection();
 
         long[] ids = new long[selection.size()];
@@ -3609,7 +3612,8 @@ public class FragmentMessages extends FragmentBase implements SharedPreferences.
         args.putLongArray("ids", getSelection());
         args.putBoolean("hide", hide);
 
-        selectionTracker.clearSelection();
+        if (selectionTracker != null)
+            selectionTracker.clearSelection();
 
         new SimpleTask<Void>() {
             @Override
@@ -3658,7 +3662,8 @@ public class FragmentMessages extends FragmentBase implements SharedPreferences.
         args.putBoolean("threading", threading &&
                 (id == null || viewType != AdapterMessage.ViewType.THREAD));
 
-        //selectionTracker.clearSelection();
+        //if (selectionTracker != null)
+        //    selectionTracker.clearSelection();
 
         new SimpleTask<Void>() {
             @Override
@@ -3774,7 +3779,8 @@ public class FragmentMessages extends FragmentBase implements SharedPreferences.
         args.putLongArray("ids", getSelection());
         args.putBoolean("threads", false);
 
-        selectionTracker.clearSelection();
+        if (selectionTracker != null)
+            selectionTracker.clearSelection();
 
         FragmentDialogForwardRaw ask = new FragmentDialogForwardRaw();
         ask.setArguments(args);
@@ -3859,7 +3865,7 @@ public class FragmentMessages extends FragmentBase implements SharedPreferences.
 
     private void onActionJunkSelection() {
         Bundle aargs = new Bundle();
-        aargs.putInt("count", selectionTracker.getSelection().size());
+        aargs.putInt("count", getSelection().length);
 
         FragmentDialogAskSpam ask = new FragmentDialogAskSpam();
         ask.setArguments(aargs);
@@ -5330,6 +5336,8 @@ public class FragmentMessages extends FragmentBase implements SharedPreferences.
                 view.post(new Runnable() {
                     @Override
                     public void run() {
+                        if (selectionTracker == null)
+                            return;
                         selectionTracker.clearSelection();
                         for (long id : ids)
                             selectionTracker.select(id);
@@ -5632,7 +5640,7 @@ public class FragmentMessages extends FragmentBase implements SharedPreferences.
             fabMore.show();
 
             Context context = tvSelectedCount.getContext();
-            int count = selectionTracker.getSelection().size();
+            int count = getSelection().length;
             tvSelectedCount.setText(NF.format(count));
             if (count > (BuildConfig.DEBUG ? 10 : MAX_MORE)) {
                 int ts = Math.round(tvSelectedCount.getTextSize());
@@ -8753,7 +8761,8 @@ public class FragmentMessages extends FragmentBase implements SharedPreferences.
         args.putLong("wakeup", duration == 0 ? -1 : time);
         args.putLongArray("ids", getSelection());
 
-        selectionTracker.clearSelection();
+        if (selectionTracker != null)
+            selectionTracker.clearSelection();
 
         new SimpleTask<Void>() {
             @Override