update GUI

software/android/app/src/main/java/com/rookiedev/hexapod/DeviceListActivity.kt

@@ -92,6 +92,11 @@ class DeviceListActivity : Activity() {
         val pairedListView: ListView = findViewById<ListView>(R.id.paired_devices)
         pairedListView.adapter = bluetoothAdapter
         pairedListView.onItemClickListener = mDeviceClickListener
+
+        val cancelPicker = findViewById<TextView>(R.id.cancel_picker)
+        cancelPicker.setOnClickListener {
+            finish()
+        }
     }
 
     /**

software/android/app/src/main/res/layout/activity_device_list.xml

@@ -30,7 +30,7 @@
         android:id="@+id/divider"
         android:layout_width="match_parent"
         android:layout_height="1dp"
-        android:background="?android:attr/listDivider" />
+        android:background="@color/grey_200" />
 
     <ListView
         android:id="@+id/paired_devices"
@@ -39,4 +39,24 @@
         android:stackFromBottom="false"
         />
 
+    <View
+        android:id="@+id/divider1"
+        android:layout_width="match_parent"
+        android:layout_height="1dp"
+        android:background="@color/grey_200" />
+
+    <TextView
+        android:id="@+id/cancel_picker"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:padding="24dp"
+        android:textAppearance="?attr/textAppearanceButton"
+        android:gravity="center_horizontal"
+        android:clickable="true"
+        android:focusable="true"
+        android:background="?attr/selectableItemBackground"
+        android:text="Cancel"
+        android:visibility="visible"
+        />
+
 </LinearLayout>

software/android/app/src/main/res/layout/activity_main.xml

@@ -100,6 +100,7 @@
                             android:layout_width="match_parent"
                             android:layout_height="wrap_content"
                             android:digits="0123456789."
+                            android:backgroundTint="@color/grey_100"
                             android:hint="IP"
                             android:inputType="number|numberDecimal"
                             android:text="192.168.1.127" />
@@ -123,6 +124,7 @@
                             android:id="@+id/port_input"
                             android:layout_width="match_parent"
                             android:layout_height="wrap_content"
+                            android:backgroundTint="@color/grey_100"
                             android:hint="Port"
                             android:inputType="number"
                             android:text="1234" />

software/android/app/src/main/res/values/colors.xml

@@ -3,6 +3,7 @@
     <color name="purple_200">#FFBB86FC</color>
     <color name="purple_500">#FF6200EE</color>
     <color name="purple_700">#FF3700B3</color>
+    <color name="grey_100">#FFF5F5F5</color>
     <color name="grey_200">#FFEEEEEE</color>
     <color name="grey_500">#FF9E9E9E</color>
     <color name="grey_700">#FF616161</color>