implement android.widget.Spinner using GtkDropDown

Helper classes from ListView implementation are reused. The declarations
have been moved to a new header file AdaperView.h

meson.build

@@ -114,6 +114,7 @@ libtranslationlayer_so = shared_library('translation_layer_main', [
                                                                   	'src/api-impl-jni/widgets/WrapperWidget.c',
                                                                   	'src/api-impl-jni/widgets/android_view_SurfaceView.c',
                                                                   	'src/api-impl-jni/widgets/android_widget_AbsListView.c',
+                                                                  	'src/api-impl-jni/widgets/android_widget_AbsSpinner.c',
                                                                   	'src/api-impl-jni/widgets/android_widget_Button.c',
                                                                   	'src/api-impl-jni/widgets/android_widget_CheckBox.c',
                                                                   	'src/api-impl-jni/widgets/android_widget_CompoundButton.c',

src/api-impl-jni/generated_headers/android_widget_AbsSpinner.h

@@ -0,0 +1,229 @@
+/* DO NOT EDIT THIS FILE - it is machine generated */
+#include <jni.h>
+/* Header for class android_widget_AbsSpinner */
+
+#ifndef _Included_android_widget_AbsSpinner
+#define _Included_android_widget_AbsSpinner
+#ifdef __cplusplus
+extern "C" {
+#endif
+#undef android_widget_AbsSpinner_NO_ID
+#define android_widget_AbsSpinner_NO_ID -1L
+#undef android_widget_AbsSpinner_NOT_FOCUSABLE
+#define android_widget_AbsSpinner_NOT_FOCUSABLE 0L
+#undef android_widget_AbsSpinner_FOCUSABLE
+#define android_widget_AbsSpinner_FOCUSABLE 1L
+#undef android_widget_AbsSpinner_FOCUSABLE_MASK
+#define android_widget_AbsSpinner_FOCUSABLE_MASK 1L
+#undef android_widget_AbsSpinner_FITS_SYSTEM_WINDOWS
+#define android_widget_AbsSpinner_FITS_SYSTEM_WINDOWS 2L
+#undef android_widget_AbsSpinner_VISIBLE
+#define android_widget_AbsSpinner_VISIBLE 0L
+#undef android_widget_AbsSpinner_INVISIBLE
+#define android_widget_AbsSpinner_INVISIBLE 4L
+#undef android_widget_AbsSpinner_GONE
+#define android_widget_AbsSpinner_GONE 8L
+#undef android_widget_AbsSpinner_VISIBILITY_MASK
+#define android_widget_AbsSpinner_VISIBILITY_MASK 12L
+#undef android_widget_AbsSpinner_ENABLED
+#define android_widget_AbsSpinner_ENABLED 0L
+#undef android_widget_AbsSpinner_DISABLED
+#define android_widget_AbsSpinner_DISABLED 32L
+#undef android_widget_AbsSpinner_ENABLED_MASK
+#define android_widget_AbsSpinner_ENABLED_MASK 32L
+#undef android_widget_AbsSpinner_WILL_NOT_DRAW
+#define android_widget_AbsSpinner_WILL_NOT_DRAW 128L
+#undef android_widget_AbsSpinner_DRAW_MASK
+#define android_widget_AbsSpinner_DRAW_MASK 128L
+#undef android_widget_AbsSpinner_SCROLLBARS_NONE
+#define android_widget_AbsSpinner_SCROLLBARS_NONE 0L
+#undef android_widget_AbsSpinner_SCROLLBARS_HORIZONTAL
+#define android_widget_AbsSpinner_SCROLLBARS_HORIZONTAL 256L
+#undef android_widget_AbsSpinner_SCROLLBARS_VERTICAL
+#define android_widget_AbsSpinner_SCROLLBARS_VERTICAL 512L
+#undef android_widget_AbsSpinner_SCROLLBARS_MASK
+#define android_widget_AbsSpinner_SCROLLBARS_MASK 768L
+#undef android_widget_AbsSpinner_FILTER_TOUCHES_WHEN_OBSCURED
+#define android_widget_AbsSpinner_FILTER_TOUCHES_WHEN_OBSCURED 1024L
+#undef android_widget_AbsSpinner_OPTIONAL_FITS_SYSTEM_WINDOWS
+#define android_widget_AbsSpinner_OPTIONAL_FITS_SYSTEM_WINDOWS 2048L
+#undef android_widget_AbsSpinner_FADING_EDGE_NONE
+#define android_widget_AbsSpinner_FADING_EDGE_NONE 0L
+#undef android_widget_AbsSpinner_FADING_EDGE_HORIZONTAL
+#define android_widget_AbsSpinner_FADING_EDGE_HORIZONTAL 4096L
+#undef android_widget_AbsSpinner_FADING_EDGE_VERTICAL
+#define android_widget_AbsSpinner_FADING_EDGE_VERTICAL 8192L
+#undef android_widget_AbsSpinner_FADING_EDGE_MASK
+#define android_widget_AbsSpinner_FADING_EDGE_MASK 12288L
+#undef android_widget_AbsSpinner_CLICKABLE
+#define android_widget_AbsSpinner_CLICKABLE 16384L
+#undef android_widget_AbsSpinner_DRAWING_CACHE_ENABLED
+#define android_widget_AbsSpinner_DRAWING_CACHE_ENABLED 32768L
+#undef android_widget_AbsSpinner_SAVE_DISABLED
+#define android_widget_AbsSpinner_SAVE_DISABLED 65536L
+#undef android_widget_AbsSpinner_SAVE_DISABLED_MASK
+#define android_widget_AbsSpinner_SAVE_DISABLED_MASK 65536L
+#undef android_widget_AbsSpinner_WILL_NOT_CACHE_DRAWING
+#define android_widget_AbsSpinner_WILL_NOT_CACHE_DRAWING 131072L
+#undef android_widget_AbsSpinner_FOCUSABLE_IN_TOUCH_MODE
+#define android_widget_AbsSpinner_FOCUSABLE_IN_TOUCH_MODE 262144L
+#undef android_widget_AbsSpinner_DRAWING_CACHE_QUALITY_LOW
+#define android_widget_AbsSpinner_DRAWING_CACHE_QUALITY_LOW 524288L
+#undef android_widget_AbsSpinner_DRAWING_CACHE_QUALITY_HIGH
+#define android_widget_AbsSpinner_DRAWING_CACHE_QUALITY_HIGH 1048576L
+#undef android_widget_AbsSpinner_DRAWING_CACHE_QUALITY_AUTO
+#define android_widget_AbsSpinner_DRAWING_CACHE_QUALITY_AUTO 0L
+#undef android_widget_AbsSpinner_DRAWING_CACHE_QUALITY_MASK
+#define android_widget_AbsSpinner_DRAWING_CACHE_QUALITY_MASK 1572864L
+#undef android_widget_AbsSpinner_LONG_CLICKABLE
+#define android_widget_AbsSpinner_LONG_CLICKABLE 2097152L
+#undef android_widget_AbsSpinner_DUPLICATE_PARENT_STATE
+#define android_widget_AbsSpinner_DUPLICATE_PARENT_STATE 4194304L
+#undef android_widget_AbsSpinner_SCROLLBARS_INSIDE_OVERLAY
+#define android_widget_AbsSpinner_SCROLLBARS_INSIDE_OVERLAY 0L
+#undef android_widget_AbsSpinner_SCROLLBARS_INSIDE_INSET
+#define android_widget_AbsSpinner_SCROLLBARS_INSIDE_INSET 16777216L
+#undef android_widget_AbsSpinner_SCROLLBARS_OUTSIDE_OVERLAY
+#define android_widget_AbsSpinner_SCROLLBARS_OUTSIDE_OVERLAY 33554432L
+#undef android_widget_AbsSpinner_SCROLLBARS_OUTSIDE_INSET
+#define android_widget_AbsSpinner_SCROLLBARS_OUTSIDE_INSET 50331648L
+#undef android_widget_AbsSpinner_SCROLLBARS_INSET_MASK
+#define android_widget_AbsSpinner_SCROLLBARS_INSET_MASK 16777216L
+#undef android_widget_AbsSpinner_SCROLLBARS_OUTSIDE_MASK
+#define android_widget_AbsSpinner_SCROLLBARS_OUTSIDE_MASK 33554432L
+#undef android_widget_AbsSpinner_SCROLLBARS_STYLE_MASK
+#define android_widget_AbsSpinner_SCROLLBARS_STYLE_MASK 50331648L
+#undef android_widget_AbsSpinner_KEEP_SCREEN_ON
+#define android_widget_AbsSpinner_KEEP_SCREEN_ON 67108864L
+#undef android_widget_AbsSpinner_SOUND_EFFECTS_ENABLED
+#define android_widget_AbsSpinner_SOUND_EFFECTS_ENABLED 134217728L
+#undef android_widget_AbsSpinner_HAPTIC_FEEDBACK_ENABLED
+#define android_widget_AbsSpinner_HAPTIC_FEEDBACK_ENABLED 268435456L
+#undef android_widget_AbsSpinner_PARENT_SAVE_DISABLED
+#define android_widget_AbsSpinner_PARENT_SAVE_DISABLED 536870912L
+#undef android_widget_AbsSpinner_PARENT_SAVE_DISABLED_MASK
+#define android_widget_AbsSpinner_PARENT_SAVE_DISABLED_MASK 536870912L
+#undef android_widget_AbsSpinner_FOCUSABLES_ALL
+#define android_widget_AbsSpinner_FOCUSABLES_ALL 0L
+#undef android_widget_AbsSpinner_FOCUSABLES_TOUCH_MODE
+#define android_widget_AbsSpinner_FOCUSABLES_TOUCH_MODE 1L
+#undef android_widget_AbsSpinner_FOCUS_BACKWARD
+#define android_widget_AbsSpinner_FOCUS_BACKWARD 1L
+#undef android_widget_AbsSpinner_FOCUS_FORWARD
+#define android_widget_AbsSpinner_FOCUS_FORWARD 2L
+#undef android_widget_AbsSpinner_FOCUS_LEFT
+#define android_widget_AbsSpinner_FOCUS_LEFT 17L
+#undef android_widget_AbsSpinner_FOCUS_UP
+#define android_widget_AbsSpinner_FOCUS_UP 33L
+#undef android_widget_AbsSpinner_FOCUS_RIGHT
+#define android_widget_AbsSpinner_FOCUS_RIGHT 66L
+#undef android_widget_AbsSpinner_FOCUS_DOWN
+#define android_widget_AbsSpinner_FOCUS_DOWN 130L
+#undef android_widget_AbsSpinner_MEASURED_SIZE_MASK
+#define android_widget_AbsSpinner_MEASURED_SIZE_MASK 16777215L
+#undef android_widget_AbsSpinner_MEASURED_STATE_MASK
+#define android_widget_AbsSpinner_MEASURED_STATE_MASK -16777216L
+#undef android_widget_AbsSpinner_MEASURED_HEIGHT_STATE_SHIFT
+#define android_widget_AbsSpinner_MEASURED_HEIGHT_STATE_SHIFT 16L
+#undef android_widget_AbsSpinner_MEASURED_STATE_TOO_SMALL
+#define android_widget_AbsSpinner_MEASURED_STATE_TOO_SMALL 16777216L
+#undef android_widget_AbsSpinner_PFLAG2_DRAG_CAN_ACCEPT
+#define android_widget_AbsSpinner_PFLAG2_DRAG_CAN_ACCEPT 1L
+#undef android_widget_AbsSpinner_PFLAG2_DRAG_HOVERED
+#define android_widget_AbsSpinner_PFLAG2_DRAG_HOVERED 2L
+#undef android_widget_AbsSpinner_LAYOUT_DIRECTION_LTR
+#define android_widget_AbsSpinner_LAYOUT_DIRECTION_LTR 0L
+#undef android_widget_AbsSpinner_LAYOUT_DIRECTION_RTL
+#define android_widget_AbsSpinner_LAYOUT_DIRECTION_RTL 1L
+#undef android_widget_AbsSpinner_LAYOUT_DIRECTION_INHERIT
+#define android_widget_AbsSpinner_LAYOUT_DIRECTION_INHERIT 2L
+#undef android_widget_AbsSpinner_LAYOUT_DIRECTION_LOCALE
+#define android_widget_AbsSpinner_LAYOUT_DIRECTION_LOCALE 3L
+#undef android_widget_AbsSpinner_PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT
+#define android_widget_AbsSpinner_PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT 2L
+#undef android_widget_AbsSpinner_PFLAG2_LAYOUT_DIRECTION_MASK
+#define android_widget_AbsSpinner_PFLAG2_LAYOUT_DIRECTION_MASK 12L
+#undef android_widget_AbsSpinner_PFLAG2_LAYOUT_DIRECTION_RESOLVED_RTL
+#define android_widget_AbsSpinner_PFLAG2_LAYOUT_DIRECTION_RESOLVED_RTL 16L
+#undef android_widget_AbsSpinner_PFLAG2_LAYOUT_DIRECTION_RESOLVED
+#define android_widget_AbsSpinner_PFLAG2_LAYOUT_DIRECTION_RESOLVED 32L
+#undef android_widget_AbsSpinner_PFLAG2_LAYOUT_DIRECTION_RESOLVED_MASK
+#define android_widget_AbsSpinner_PFLAG2_LAYOUT_DIRECTION_RESOLVED_MASK 48L
+#undef android_widget_AbsSpinner_STATUS_BAR_HIDDEN
+#define android_widget_AbsSpinner_STATUS_BAR_HIDDEN 1L
+#undef android_widget_AbsSpinner_STATUS_BAR_VISIBLE
+#define android_widget_AbsSpinner_STATUS_BAR_VISIBLE 0L
+#undef android_widget_AbsSpinner_SYSTEM_UI_FLAG_FULLSCREEN
+#define android_widget_AbsSpinner_SYSTEM_UI_FLAG_FULLSCREEN 4L
+#undef android_widget_AbsSpinner_SYSTEM_UI_FLAG_HIDE_NAVIGATION
+#define android_widget_AbsSpinner_SYSTEM_UI_FLAG_HIDE_NAVIGATION 2L
+#undef android_widget_AbsSpinner_SYSTEM_UI_FLAG_IMMERSIVE
+#define android_widget_AbsSpinner_SYSTEM_UI_FLAG_IMMERSIVE 2048L
+#undef android_widget_AbsSpinner_SYSTEM_UI_FLAG_IMMERSIVE_STICKY
+#define android_widget_AbsSpinner_SYSTEM_UI_FLAG_IMMERSIVE_STICKY 4096L
+#undef android_widget_AbsSpinner_SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
+#define android_widget_AbsSpinner_SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN 1024L
+#undef android_widget_AbsSpinner_SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
+#define android_widget_AbsSpinner_SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION 512L
+#undef android_widget_AbsSpinner_SYSTEM_UI_FLAG_LAYOUT_STABLE
+#define android_widget_AbsSpinner_SYSTEM_UI_FLAG_LAYOUT_STABLE 256L
+#undef android_widget_AbsSpinner_SYSTEM_UI_FLAG_LOW_PROFILE
+#define android_widget_AbsSpinner_SYSTEM_UI_FLAG_LOW_PROFILE 1L
+#undef android_widget_AbsSpinner_SYSTEM_UI_FLAG_VISIBLE
+#define android_widget_AbsSpinner_SYSTEM_UI_FLAG_VISIBLE 0L
+#undef android_widget_AbsSpinner_SYSTEM_UI_LAYOUT_FLAGS
+#define android_widget_AbsSpinner_SYSTEM_UI_LAYOUT_FLAGS 1536L
+#undef android_widget_AbsSpinner_TEXT_ALIGNMENT_CENTER
+#define android_widget_AbsSpinner_TEXT_ALIGNMENT_CENTER 4L
+#undef android_widget_AbsSpinner_TEXT_ALIGNMENT_GRAVITY
+#define android_widget_AbsSpinner_TEXT_ALIGNMENT_GRAVITY 1L
+#undef android_widget_AbsSpinner_TEXT_ALIGNMENT_INHERIT
+#define android_widget_AbsSpinner_TEXT_ALIGNMENT_INHERIT 0L
+#undef android_widget_AbsSpinner_TEXT_ALIGNMENT_TEXT_END
+#define android_widget_AbsSpinner_TEXT_ALIGNMENT_TEXT_END 3L
+#undef android_widget_AbsSpinner_TEXT_ALIGNMENT_TEXT_START
+#define android_widget_AbsSpinner_TEXT_ALIGNMENT_TEXT_START 2L
+#undef android_widget_AbsSpinner_TEXT_ALIGNMENT_VIEW_END
+#define android_widget_AbsSpinner_TEXT_ALIGNMENT_VIEW_END 6L
+#undef android_widget_AbsSpinner_TEXT_ALIGNMENT_VIEW_START
+#define android_widget_AbsSpinner_TEXT_ALIGNMENT_VIEW_START 5L
+#undef android_widget_AbsSpinner_TEXT_DIRECTION_ANY_RTL
+#define android_widget_AbsSpinner_TEXT_DIRECTION_ANY_RTL 2L
+#undef android_widget_AbsSpinner_TEXT_DIRECTION_FIRST_STRONG
+#define android_widget_AbsSpinner_TEXT_DIRECTION_FIRST_STRONG 1L
+#undef android_widget_AbsSpinner_TEXT_DIRECTION_INHERIT
+#define android_widget_AbsSpinner_TEXT_DIRECTION_INHERIT 0L
+#undef android_widget_AbsSpinner_TEXT_DIRECTION_LOCALE
+#define android_widget_AbsSpinner_TEXT_DIRECTION_LOCALE 5L
+#undef android_widget_AbsSpinner_TEXT_DIRECTION_LTR
+#define android_widget_AbsSpinner_TEXT_DIRECTION_LTR 3L
+#undef android_widget_AbsSpinner_TEXT_DIRECTION_RTL
+#define android_widget_AbsSpinner_TEXT_DIRECTION_RTL 4L
+/*
+ * Class:     android_widget_AbsSpinner
+ * Method:    native_constructor
+ * Signature: (Landroid/content/Context;Landroid/util/AttributeSet;)J
+ */
+JNIEXPORT jlong JNICALL Java_android_widget_AbsSpinner_native_1constructor
+  (JNIEnv *, jobject, jobject, jobject);
+
+/*
+ * Class:     android_widget_AbsSpinner
+ * Method:    native_setAdapter
+ * Signature: (JLandroid/widget/SpinnerAdapter;)V
+ */
+JNIEXPORT void JNICALL Java_android_widget_AbsSpinner_native_1setAdapter
+  (JNIEnv *, jobject, jlong, jobject);
+
+/*
+ * Class:     android_widget_AbsSpinner
+ * Method:    setOnItemSelectedListener
+ * Signature: (Landroid/widget/AdapterView/OnItemSelectedListener;)V
+ */
+JNIEXPORT void JNICALL Java_android_widget_AbsSpinner_setOnItemSelectedListener
+  (JNIEnv *, jobject, jobject);
+
+#ifdef __cplusplus
+}
+#endif
+#endif

src/api-impl-jni/widgets/AdapterView.h

@@ -0,0 +1,31 @@
+#ifndef _ADAPTER_VIEW_H_
+#define _ADAPTER_VIEW_H_
+
+#include <gtk/gtk.h>
+#include <jni.h>
+
+/*
+ * RangeListModel:
+ * Implementation of GListModel for use in AdapterView subclasses.
+ * Provides RangeListItems, which are created on demand.
+ */
+struct _RangeListModel {
+	GObject parent_instance;
+	GtkWidget *list_view;
+	jobject jobject;
+	jobject adapter;
+	guint n_items;
+};
+G_DECLARE_FINAL_TYPE(RangeListModel, range_list_model, RANGE, LIST_MODEL, GObject)
+
+/*
+ * RangeListItem:
+ * Dummy type to be returned by RangeListModel. Contains nothing, but a reference to the RangeListModel.
+ */
+struct _RangeListItem {
+	GObject parent_instance;
+	RangeListModel *model;
+};
+G_DECLARE_FINAL_TYPE(RangeListItem, range_list_item, RANGE, LIST_ITEM, GObject)
+
+#endif // _ADAPTER_VIEW_H_

src/api-impl-jni/widgets/android_widget_AbsListView.c

@@ -6,17 +6,10 @@
 #include "../util.h"
 
 #include "WrapperWidget.h"
+#include "AdapterView.h"
 
 #include "../generated_headers/android_widget_AbsListView.h"
 
-struct _RangeListModel {
-	GObject parent_instance;
-	GtkListView *list_view;
-	jobject jobject;
-	jobject adapter;
-	guint n_items;
-};
-G_DECLARE_FINAL_TYPE(RangeListModel, range_list_model, RANGE, LIST_MODEL, GObject)
 static void range_list_model_init(RangeListModel *list_model) {}
 static void range_list_model_class_init(RangeListModelClass *class) {}
 
@@ -27,24 +20,32 @@ static guint range_list_model_get_n_items(GListModel *list_model)
 
 static gpointer range_list_model_get_item(GListModel *list_model, guint index)
 {
-	return g_object_ref(list_model);
+	if (index >= RANGE_LIST_MODEL(list_model)->n_items)
+		return NULL;
+	RangeListItem *item = g_object_new(range_list_item_get_type(), NULL);
+	item->model = RANGE_LIST_MODEL(list_model);
+	return item;
 }
 
 static void range_list_model_model_init(GListModelInterface *iface)
 {
 	iface->get_n_items = range_list_model_get_n_items;
-	iface->get_item_type = (GType (*)(GListModel *))range_list_model_get_type;
+	iface->get_item_type = (GType (*)(GListModel *))range_list_item_get_type;
 	iface->get_item = range_list_model_get_item;
 }
 
 G_DEFINE_TYPE_WITH_CODE(RangeListModel, range_list_model, G_TYPE_OBJECT,
 		G_IMPLEMENT_INTERFACE(G_TYPE_LIST_MODEL, range_list_model_model_init))
 
+static void range_list_item_class_init(RangeListItemClass *cls){}
+static void range_list_item_init(RangeListItem *self){}
+G_DEFINE_TYPE(RangeListItem, range_list_item, G_TYPE_OBJECT)
+
 static void on_click(GtkGestureClick *gesture, int n_press, double x, double y, GtkListItem *list_item)
 {
 	JNIEnv *env = get_jni_env();
 	guint position = gtk_list_item_get_position(list_item);
-	RangeListModel *model = RANGE_LIST_MODEL(gtk_list_item_get_item(list_item));
+	RangeListModel *model = RANGE_LIST_ITEM(gtk_list_item_get_item(list_item))->model;
 	jobject listener = g_object_get_data(G_OBJECT(model->list_view), "on_click_listener");
 	if (!listener)
 		return;
@@ -63,7 +64,7 @@ static void bind_listitem_cb(GtkListItemFactory *factory, GtkListItem *list_item
 
 	guint index = gtk_list_item_get_position(list_item);
 	WrapperWidget *wrapper = WRAPPER_WIDGET(gtk_list_item_get_child(list_item));
-	RangeListModel *model = RANGE_LIST_MODEL(gtk_list_item_get_item(list_item));
+	RangeListModel *model = RANGE_LIST_ITEM(gtk_list_item_get_item(list_item))->model;
 	int n_items = g_list_model_get_n_items(G_LIST_MODEL(model));
 	if (index >= n_items) {
 		printf("invalid index: %d >= %d\n", index, n_items);
@@ -98,7 +99,7 @@ JNIEXPORT jlong JNICALL Java_android_widget_AbsListView_native_1constructor(JNIE
 	g_signal_connect(factory, "unbind", G_CALLBACK(unbind_listitem_cb), NULL);
 	RangeListModel *model = g_object_new(range_list_model_get_type(), NULL);
 	GtkWidget *list_view = gtk_list_view_new(GTK_SELECTION_MODEL(gtk_single_selection_new(G_LIST_MODEL(model))), factory);
-	model->list_view = GTK_LIST_VIEW(list_view);
+	model->list_view = list_view;
 	model->jobject = _REF(this);
 	GtkWidget *scrolled_window = gtk_scrolled_window_new();
 	gtk_scrolled_window_set_propagate_natural_height(GTK_SCROLLED_WINDOW(scrolled_window), TRUE);

src/api-impl-jni/widgets/android_widget_AbsSpinner.c

@@ -0,0 +1,71 @@
+#include <gtk/gtk.h>
+
+#include "../defines.h"
+#include "../util.h"
+
+#include "WrapperWidget.h"
+#include "AdapterView.h"
+
+#include "../generated_headers/android_widget_AbsSpinner.h"
+
+static void bind_listitem_cb(GtkListItemFactory *factory, GtkListItem *list_item)
+{
+	JNIEnv *env = get_jni_env();
+
+	guint index = gtk_list_item_get_position(list_item);
+	WrapperWidget *wrapper = WRAPPER_WIDGET(gtk_list_item_get_child(list_item));
+	RangeListModel *model = RANGE_LIST_ITEM(gtk_list_item_get_item(list_item))->model;
+	int n_items = g_list_model_get_n_items(G_LIST_MODEL(model));
+	if (index >= n_items) {
+		printf("invalid index: %d >= %d\n", index, n_items);
+		exit(0);
+	}
+	jmethodID getView = _METHOD(_CLASS(model->adapter), "getDropDownView", "(ILandroid/view/View;Landroid/view/ViewGroup;)Landroid/view/View;");
+	jobject view = (*env)->CallObjectMethod(env, model->adapter, getView, index, wrapper ? wrapper->jobj : NULL, model->jobject);
+	view = _REF(view);
+	GtkWidget *child = gtk_widget_get_parent(GTK_WIDGET(_PTR(_GET_LONG_FIELD(view, "widget"))));
+	gtk_list_item_set_child(list_item, child);
+}
+
+JNIEXPORT jlong JNICALL Java_android_widget_AbsSpinner_native_1constructor(JNIEnv *env, jobject this, jobject context, jobject attrs)
+{
+	GtkWidget *wrapper = g_object_ref(wrapper_widget_new());
+	GtkListItemFactory *factory = gtk_signal_list_item_factory_new();
+	g_signal_connect(factory, "bind", G_CALLBACK(bind_listitem_cb), NULL);
+	RangeListModel *model = g_object_new(range_list_model_get_type(), NULL);
+	GtkWidget *dropdown = gtk_drop_down_new(G_LIST_MODEL(model), NULL);
+	gtk_drop_down_set_factory(GTK_DROP_DOWN(dropdown), factory);
+	model->list_view = dropdown;
+	model->jobject = _REF(this);
+	wrapper_widget_set_child(WRAPPER_WIDGET(wrapper), dropdown);
+	gtk_widget_set_name(dropdown, "Spinner");
+	return _INTPTR(dropdown);
+}
+
+JNIEXPORT void JNICALL Java_android_widget_AbsSpinner_native_1setAdapter(JNIEnv *env, jobject this, jlong widget_ptr, jobject adapter)
+{
+	GtkDropDown *dropdown = GTK_DROP_DOWN(_PTR(widget_ptr));
+	RangeListModel *model = RANGE_LIST_MODEL(gtk_drop_down_get_model(dropdown));
+
+	if (model->adapter)
+		_UNREF(model->adapter);
+	model->adapter = adapter ? _REF(adapter) : NULL;
+	guint old_n_items = model->n_items;
+	model->n_items = adapter ? (*env)->CallIntMethod(env, adapter, _METHOD(_CLASS(adapter), "getCount", "()I")) : 0;
+	g_list_model_items_changed(G_LIST_MODEL(model), 0, old_n_items, model->n_items);
+}
+
+static void on_selected_changed(GtkDropDown *dropdown, GParamSpec *pspec, jobject listener)
+{
+	JNIEnv *env = get_jni_env();
+	int index = gtk_drop_down_get_selected(dropdown);
+	RangeListModel *model = RANGE_LIST_ITEM(gtk_drop_down_get_selected_item(dropdown))->model;
+	jmethodID onItemSelected = _METHOD(_CLASS(listener), "onItemSelected", "(Landroid/widget/AdapterView;Landroid/view/View;IJ)V");
+	(*env)->CallVoidMethod(env, listener, onItemSelected, model->jobject, NULL, index, (long)0);
+}
+
+JNIEXPORT void JNICALL Java_android_widget_AbsSpinner_setOnItemSelectedListener(JNIEnv *env, jobject this, jobject listener)
+{
+	GtkDropDown *dropdown = GTK_DROP_DOWN(_PTR(_GET_LONG_FIELD(this, "widget")));
+	g_signal_connect(dropdown, "notify::selected", G_CALLBACK(on_selected_changed), _REF(listener));
+}

src/api-impl/android/widget/AbsSpinner.java

@@ -1,16 +1,52 @@
 package android.widget;
 
 import android.content.Context;
+import android.database.DataSetObserver;
 import android.util.AttributeSet;
 
 public abstract class AbsSpinner extends AdapterView {
+	private Observer observer = new Observer();
 
 	public AbsSpinner(Context context) {
 		super(context);
+		haveCustomMeasure = false;
 	}
 
 	public AbsSpinner(Context context, AttributeSet attributeSet) {
 		super(context, attributeSet);
+		haveCustomMeasure = false;
 	}
 
+	@Override
+	protected native long native_constructor(Context context, AttributeSet attrs);
+	protected native void native_setAdapter(long widget, SpinnerAdapter adapter);
+
+	public void setAdapter(SpinnerAdapter adapter) {
+		SpinnerAdapter oldAdapter = getAdapter();
+		if (oldAdapter != null)
+			oldAdapter.unregisterDataSetObserver(observer);
+		super.setAdapter(adapter);
+		if (adapter != null)
+			adapter.registerDataSetObserver(observer);
+		native_setAdapter(this.widget, adapter);
+	}
+
+	public SpinnerAdapter getAdapter() {
+		return (SpinnerAdapter) super.getAdapter();
+	}
+
+	@Override
+	public native void setOnItemSelectedListener(AdapterView.OnItemSelectedListener listener);
+
+	private class Observer extends DataSetObserver {
+
+		@Override
+		public void onChanged() {
+			AbsSpinner.this.native_setAdapter(widget, getAdapter());
+		}
+		@Override
+		public void onInvalidated() {
+			AbsSpinner.this.native_setAdapter(widget, getAdapter());
+		}
+	}
 }

src/api-impl/android/widget/Spinner.java

@@ -13,8 +13,4 @@ public class Spinner extends AbsSpinner {
 		super(context, attributeSet);
 	}
 
-	public void setAdapter(SpinnerAdapter adapter) {
-		super.setAdapter(adapter);
-	}
-
 }