Added option to enable double tap

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

@@ -1401,6 +1401,21 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
                                     .putExtra("action", "edit")
                                     .putExtra("id", message.id));
                 else {
+                    final LocalBroadcastManager lbm = LocalBroadcastManager.getInstance(context);
+                    final Intent viewThread = new Intent(ActivityView.ACTION_VIEW_THREAD)
+                            .putExtra("account", message.account)
+                            .putExtra("thread", message.thread)
+                            .putExtra("id", message.id)
+                            .putExtra("found", viewType == ViewType.SEARCH);
+
+                    SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
+                    boolean doubletap = prefs.getBoolean("doubletap", false);
+
+                    if (!doubletap) {
+                        lbm.sendBroadcast(viewThread);
+                        return;
+                    }
+
                     firstClick = !firstClick;
                     if (firstClick) {
                         new Handler().postDelayed(new Runnable() {
@@ -1408,14 +1423,7 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
                             public void run() {
                                 if (firstClick) {
                                     firstClick = false;
-
-                                    LocalBroadcastManager lbm = LocalBroadcastManager.getInstance(context);
-                                    lbm.sendBroadcast(
-                                            new Intent(ActivityView.ACTION_VIEW_THREAD)
-                                                    .putExtra("account", message.account)
-                                                    .putExtra("thread", message.thread)
-                                                    .putExtra("id", message.id)
-                                                    .putExtra("found", viewType == ViewType.SEARCH));
+                                    lbm.sendBroadcast(viewThread);
                                 }
                             }
                         }, ViewConfiguration.getDoubleTapTimeout());

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

@@ -38,6 +38,7 @@ public class FragmentOptionsBehavior extends FragmentBase implements SharedPrefe
     private SwitchCompat swPull;
     private SwitchCompat swAutoScroll;
     private SwitchCompat swSwipeNav;
+    private SwitchCompat swDoubleTap;
     private SwitchCompat swAutoExpand;
     private SwitchCompat swAutoClose;
     private SwitchCompat swAutoNext;
@@ -46,7 +47,7 @@ public class FragmentOptionsBehavior extends FragmentBase implements SharedPrefe
     private SwitchCompat swAutoMove;
 
     private final static String[] RESET_OPTIONS = new String[]{
-            "pull", "autoscroll", "swipenav", "autoexpand", "autoclose", "autonext",
+            "pull", "autoscroll", "swipenav", "doubletap", "autoexpand", "autoclose", "autonext",
             "collapse", "autoread", "automove"
     };
 
@@ -63,6 +64,7 @@ public class FragmentOptionsBehavior extends FragmentBase implements SharedPrefe
         swPull = view.findViewById(R.id.swPull);
         swAutoScroll = view.findViewById(R.id.swAutoScroll);
         swSwipeNav = view.findViewById(R.id.swSwipeNav);
+        swDoubleTap = view.findViewById(R.id.swDoubleTap);
         swAutoExpand = view.findViewById(R.id.swAutoExpand);
         swAutoClose = view.findViewById(R.id.swAutoClose);
         swAutoNext = view.findViewById(R.id.swAutoNext);
@@ -97,6 +99,13 @@ public class FragmentOptionsBehavior extends FragmentBase implements SharedPrefe
             }
         });
 
+        swDoubleTap.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
+            @Override
+            public void onCheckedChanged(CompoundButton compoundButton, boolean checked) {
+                prefs.edit().putBoolean("doubletap", checked).apply();
+            }
+        });
+
         swAutoExpand.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
             @Override
             public void onCheckedChanged(CompoundButton compoundButton, boolean checked) {
@@ -187,6 +196,7 @@ public class FragmentOptionsBehavior extends FragmentBase implements SharedPrefe
         swPull.setChecked(prefs.getBoolean("pull", true));
         swAutoScroll.setChecked(prefs.getBoolean("autoscroll", false));
         swSwipeNav.setChecked(prefs.getBoolean("swipenav", true));
+        swDoubleTap.setChecked(prefs.getBoolean("doubletap", false));
         swAutoExpand.setChecked(prefs.getBoolean("autoexpand", true));
         swAutoClose.setChecked(prefs.getBoolean("autoclose", true));
         swAutoNext.setChecked(prefs.getBoolean("autonext", false));

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

@@ -22,6 +22,7 @@
                 android:id="@+id/swPull"
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
+                android:checked="true"
                 android:text="@string/title_advanced_pull_refresh"
                 app:layout_constraintStart_toStartOf="parent"
                 app:layout_constraintTop_toTopOf="parent"
@@ -42,19 +43,31 @@
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
                 android:layout_marginTop="12dp"
+                android:checked="true"
                 android:text="@string/title_advanced_swipenav"
                 app:layout_constraintStart_toStartOf="parent"
                 app:layout_constraintTop_toBottomOf="@id/swAutoScroll"
                 app:switchPadding="12dp" />
 
+            <androidx.appcompat.widget.SwitchCompat
+                android:id="@+id/swDoubleTap"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="12dp"
+                android:text="@string/title_advanced_double_tap"
+                app:layout_constraintStart_toStartOf="parent"
+                app:layout_constraintTop_toBottomOf="@id/swSwipeNav"
+                app:switchPadding="12dp" />
+
             <androidx.appcompat.widget.SwitchCompat
                 android:id="@+id/swAutoExpand"
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
                 android:layout_marginTop="12dp"
+                android:checked="true"
                 android:text="@string/title_advanced_autoexpand"
                 app:layout_constraintStart_toStartOf="parent"
-                app:layout_constraintTop_toBottomOf="@id/swSwipeNav"
+                app:layout_constraintTop_toBottomOf="@id/swDoubleTap"
                 app:switchPadding="12dp" />
 
             <TextView
@@ -96,6 +109,7 @@
                 android:layout_width="match_parent"
                 android:layout_height="22dp"
                 android:layout_marginTop="12dp"
+                android:checked="true"
                 android:text="@string/title_advanced_autoclose"
                 app:layout_constraintStart_toStartOf="parent"
                 app:layout_constraintTop_toBottomOf="@id/tvAutoCollapseHint"

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

@@ -207,6 +207,7 @@
     <string name="title_advanced_pull_refresh">Pull down to refresh</string>
     <string name="title_advanced_autoscroll">Scroll to top on receiving new messages</string>
     <string name="title_advanced_swipenav">Swipe left/right to go to next/previous conversation</string>
+    <string name="title_advanced_double_tap">Double tap to mark message read/unread</string>
     <string name="title_advanced_autoexpand">Automatically expand messages</string>
     <string name="title_advanced_collapse">Collapse messages in conversations on \'back\'</string>
     <string name="title_advanced_autoclose">Automatically close conversations</string>