def create(self):
# DetailedList is not a specific widget on Android, so we build it out
# of a few pieces.
if self.native is None:
self.native = android_widgets.LinearLayout(self._native_activity)
self.native.setOrientation(android_widgets.LinearLayout.VERTICAL)
else:
# If create() is called a second time, clear the widget and regenerate it.
self.native.removeAllViews()
scroll_view = android_widgets.ScrollView(self._native_activity)
scroll_view_layout_params = android_widgets.LinearLayout__LayoutParams(
android_widgets.LinearLayout__LayoutParams.MATCH_PARENT,
android_widgets.LinearLayout__LayoutParams.MATCH_PARENT)
scroll_view_layout_params.gravity = android_widgets.Gravity.TOP
swipe_refresh_wrapper = android_widgets.SwipeRefreshLayout(
self._native_activity)
swipe_refresh_wrapper.setOnRefreshListener(
OnRefreshListener(self.interface))
self._android_swipe_refresh_layout = android_widgets.SwipeRefreshLayout(
__jni__=java.NewGlobalRef(swipe_refresh_wrapper))
swipe_refresh_wrapper.addView(scroll_view)
self.native.addView(swipe_refresh_wrapper, scroll_view_layout_params)
dismissable_container = android_widgets.LinearLayout(
self._native_activity)
dismissable_container.setOrientation(
android_widgets.LinearLayout.VERTICAL)
dismissable_container_params = android_widgets.LinearLayout__LayoutParams(
android_widgets.LinearLayout__LayoutParams.MATCH_PARENT,
android_widgets.LinearLayout__LayoutParams.MATCH_PARENT)
scroll_view.addView(dismissable_container,
dismissable_container_params)
for i in range(len((self.interface.data or []))):
self._make_row(dismissable_container, i)
def _get_activity(_cache=[]):
"""
Android Toga widgets need a reference to the current activity to pass it as `context` when creating
Android native widgets. This may be useful at any time, so we retain a global JNI ref.
:param _cache: List that is either empty or contains 1 item, the cached global JNI ref
"""
if _cache:
return _cache[0]
# See MainActivity.onCreate() for initialization of .singletonThis:
# https://github.com/beeware/briefcase-android-gradle-template/blob/3.7/%7B%7B%20cookiecutter.formal_name%20%7D%7D/app/src/main/java/org/beeware/android/MainActivity.java
if MainActivity.singletonThis is None:
raise ValueError(
"Unable to find MainActivity.singletonThis from Python. This is typically set by "
"org.beeware.android.MainActivity.onCreate().")
_cache.append(
MainActivity(__jni__=java.NewGlobalRef(MainActivity.singletonThis)))
return _cache[0]