Improve the UI when no certificates are trusted

Author: pimterry

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

@@ -20,11 +20,24 @@
             android:layout_width="match_parent"
             android:layout_height="wrap_content">
 
-        <TextView
-                style="@style/ConnectionStatusHeading"
-                android:drawableStart="@drawable/ic_exclamation_triangle"
-                android:text="@string/disabled_connection_status_heading" />
+        <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:orientation="vertical">
 
+            <TextView
+                    style="@style/ConnectionStatusHeading"
+                    android:drawableStart="@drawable/ic_exclamation_triangle"
+                    android:text="@string/disabled_connection_status_heading" />
+
+            <TextView
+                    android:id="@+id/connectionStatusText"
+                    style="@style/ConnectionStatusText"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:textColorLink="@color/primaryInputBackground"
+                    android:text="@string/none_connection_status_details" />
+        </LinearLayout>
     </com.google.android.material.card.MaterialCardView>
 
 </android.widget.LinearLayout>

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

@@ -20,6 +20,7 @@
     <string name="system_connection_status_disabled_heading">System interception disabled</string>
     <string name="system_connection_status_enabled_heading">System interception enabled</string>
 
+    <string name="none_connection_status_details">Your HTTP Toolkit certificate is not trusted on this device, so HTTPS will only be intercepted from apps that directly embed and trust it.\n\nDisconnect and reconnect to rerun HTTPS certificate setup.</string>
     <string name="user_connection_status_details">HTTPS traffic will be only intercepted from apps that are configured to trust user-installed certificates (<a href="https://httptoolkit.tech/docs/guides/android#intercepting-traffic-from-your-own-android-app">How?</a>)</string>
     <string name="system_connection_status_details">Traffic will be intercepted from all installed applications, except those using explicit certificate pinning.</string>