Implemented Divider Widget on Android.

android/src/toga_android/factory.py

@@ -10,6 +10,7 @@
 from .widgets.canvas import Canvas
 from .widgets.dateinput import DateInput
 from .widgets.detailedlist import DetailedList
+from .widgets.divider import Divider
 from .widgets.imageview import ImageView
 from .widgets.label import Label
 from .widgets.multilinetextinput import MultilineTextInput
@@ -33,34 +34,41 @@ def not_implemented(feature):
 
 __all__ = [
     "App",
-    "Box",
-    "Button",
-    "Canvas",
     "Command",
-    "DateInput",
+    "MainWindow",
+    "not_implemented",
+    # Resources
+    "dialogs",
     "Font",
     "Icon",
     "Image",
+    "Paths",
+    # Widgets
+    # ActivityIndicator
+    "Box",
+    "Button",
+    "Canvas",
+    "DateInput",
+    "DetailedList",
+    "Divider",
     "ImageView",
     "Label",
-    "MainWindow",
     "MultilineTextInput",
     "NumberInput",
+    # "OptionContainer",
     "PasswordInput",
     "ProgressBar",
+    "ScrollContainer",
+    # "SplitContainer",
     "Selection",
     "Slider",
-    "ScrollContainer",
     "Switch",
     "Table",
     "TextInput",
     "TimeInput",
+    # "Tree",
     "WebView",
     "Window",
-    "DetailedList",
-    "not_implemented",
-    "Paths",
-    "dialogs",
 ]
 
 

android/src/toga_android/widgets/divider.py

@@ -0,0 +1,42 @@
+from android.graphics import Color
+from android.view import View
+from android.widget import LinearLayout
+from travertino.size import at_least
+
+from .base import Widget
+
+
+class Divider(Widget):
+    def create(self):
+        self.native = View(self._native_activity)
+
+        # Background color needs to be set or else divider will not be visible.
+        self.native.setBackgroundColor(Color.LTGRAY)
+
+        self._direction = self.interface.HORIZONTAL
+
+    def set_background_color(self, value):
+        self.set_background_simple(value)
+
+    def get_direction(self):
+        return self._direction
+
+    def set_direction(self, value):
+        self._direction = value
+
+        if value == self.interface.VERTICAL:
+            # Set the height for a vertical divider
+            params = LinearLayout.LayoutParams(1, self.interface._MIN_HEIGHT)
+        else:
+            # Set the width for a horizontal divider
+            params = LinearLayout.LayoutParams(self.interface._MIN_WIDTH, 1)
+
+        self.native.setLayoutParams(params)
+
+    def rehint(self):
+        if self.get_direction() == self.interface.VERTICAL:
+            self.interface.intrinsic.width = 1
+            self.interface.intrinsic.height = at_least(self.native.getHeight())
+        else:
+            self.interface.intrinsic.width = at_least(self.native.getWidth())
+            self.interface.intrinsic.height = 1

android/tests_backend/widgets/divider.py

@@ -0,0 +1,7 @@
+from java import jclass
+
+from .base import SimpleProbe
+
+
+class DividerProbe(SimpleProbe):
+    native_class = jclass("android.view.View")

changes/2181.feature.rst

@@ -0,0 +1 @@
+The Divider widget was implemented on Android.

docs/reference/data/widgets_by_platform.csv

@@ -8,7 +8,7 @@ Button,General Widget,:class:`~toga.Button`,Basic clickable Button,|y|,|y|,|y|,|
 Canvas,General Widget,:class:`~toga.Canvas`,A drawing area for 2D vector graphics.,|y|,|y|,|y|,|y|,|y|,,
 DateInput,General Widget,:class:`~toga.DateInput`,A widget to select a calendar date,,,|y|,,|y|,,
 DetailedList,General Widget,:class:`~toga.DetailedList`,"An ordered list of content where each item has an icon, a main heading, and a line of supplementary text.",|y|,|y|,|b|,|y|,|y|,,
-Divider,General Widget,:class:`~toga.Divider`,A horizontal or vertical line,|y|,|y|,|y|,,,|b|,
+Divider,General Widget,:class:`~toga.Divider`,A horizontal or vertical line,|y|,|y|,|y|,,|y|,|b|,
 ImageView,General Widget,:class:`~toga.ImageView`,A widget that displays an image,|y|,|y|,|y|,|y|,|y|,,
 Label,General Widget,:class:`~toga.Label`,Text label,|y|,|y|,|y|,|y|,|y|,|b|,|b|
 MultilineTextInput,General Widget,:class:`~toga.MultilineTextInput`,Multi-line Text Input field,|y|,|y|,|y|,|y|,|y|,,

testbed/tests/widgets/test_divider.py

@@ -13,7 +13,7 @@
 
 @pytest.fixture
 async def widget():
-    skip_on_platforms("android", "iOS")
+    skip_on_platforms("iOS")
     return toga.Divider()