Setup welcome collapsible

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

@@ -67,6 +67,9 @@ public class FragmentSetup extends FragmentBase {
     private TextView tvPrivacy;
     private TextView tvSupport;
 
+    private ImageButton ibWelcome;
+    private Group grpWelcome;
+
     private TextView tvNoInternet;
     private ImageButton ibHelp;
     private Button btnQuick;
@@ -128,6 +131,8 @@ public class FragmentSetup extends FragmentBase {
 
         tvPrivacy = view.findViewById(R.id.tvPrivacy);
         tvSupport = view.findViewById(R.id.tvSupport);
+        ibWelcome = view.findViewById(R.id.ibWelcome);
+        grpWelcome = view.findViewById(R.id.grpWelcome);
 
         tvNoInternet = view.findViewById(R.id.tvNoInternet);
         ibHelp = view.findViewById(R.id.ibHelp);
@@ -186,6 +191,18 @@ public class FragmentSetup extends FragmentBase {
             }
         });
 
+        updateWelcome();
+
+        ibWelcome.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(view.getContext());
+                boolean setup_welcome = !prefs.getBoolean("setup_welcome", true);
+                prefs.edit().putBoolean("setup_welcome", setup_welcome).apply();
+                updateWelcome();
+            }
+        });
+
         ibHelp.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View view) {
@@ -658,6 +675,13 @@ public class FragmentSetup extends FragmentBase {
         }
     }
 
+    private void updateWelcome() {
+        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(getContext());
+        boolean setup_welcome = prefs.getBoolean("setup_welcome", true);
+        ibWelcome.setImageLevel(setup_welcome ? 0 /* less */ : 1 /* more */);
+        grpWelcome.setVisibility(setup_welcome ? View.VISIBLE : View.GONE);
+    }
+
     private void updateManual() {
         FragmentActivity activity = getActivity();
         if (activity != null) {

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

@@ -123,6 +123,23 @@
                     app:layout_constraintEnd_toEndOf="parent"
                     app:layout_constraintStart_toEndOf="@id/tvPrivacy"
                     app:layout_constraintTop_toBottomOf="@id/analytics" />
+
+                <ImageButton
+                    android:id="@+id/ibWelcome"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:layout_marginTop="12dp"
+                    android:background="?android:attr/selectableItemBackgroundBorderless"
+                    app:layout_constraintEnd_toEndOf="parent"
+                    app:layout_constraintStart_toStartOf="parent"
+                    app:layout_constraintTop_toBottomOf="@id/tvSupport"
+                    app:srcCompat="@drawable/expander" />
+
+                <androidx.constraintlayout.widget.Group
+                    android:id="@+id/grpWelcome"
+                    android:layout_width="0dp"
+                    android:layout_height="0dp"
+                    app:constraint_referenced_ids="intro,simple,issue,analytics,tvPrivacy,tvSupport" />
             </androidx.constraintlayout.widget.ConstraintLayout>
         </androidx.cardview.widget.CardView>