Android file browser

examples/dialogs/dialogs/app.py

@@ -43,6 +43,18 @@ def action_open_file_dialog(self, widget):
         except ValueError:
             self.label.text = "Open file dialog was canceled"
 
+    async def action_open_file_dialog_android(self, widget):
+        try:
+            selected_uri = ''
+            selected_uri = await self.app.main_window.open_file_dialog(
+                title="Choose a file",
+                multiselect=False)
+            self.label.text = "You selected: " + str(selected_uri)
+        except ValueError as e:
+            selected_uri = str(e)
+            self.label.text = selected_uri
+        print(str(selected_uri))
+
     def action_open_file_filtered_dialog(self, widget):
         try:
             fname = self.main_window.open_file_dialog(
@@ -57,6 +69,9 @@ def action_open_file_filtered_dialog(self, widget):
         except ValueError:
             self.label.text = "Open file dialog was canceled"
 
+    def action_open_file_filtered_dialog_android(self, widget):
+        self.label.text = "file_types currently not supported by rubicon java"
+
     def action_open_file_dialog_multi(self, widget):
         try:
             filenames = self.main_window.open_file_dialog(
@@ -72,6 +87,18 @@ def action_open_file_dialog_multi(self, widget):
         except ValueError:
             self.label.text = "Open file dialog was canceled"
 
+    async def action_open_file_dialog_multi_android(self, widget):
+        try:
+            selected_uri = ''
+            selected_uri = await self.app.main_window.open_file_dialog(
+                title="Choose a file",
+                multiselect=True)
+            self.label.text = "You selected: " + str(selected_uri)
+        except ValueError as e:
+            selected_uri = str(e)
+            self.label.text = selected_uri
+        print(str(selected_uri))
+
     def action_select_folder_dialog(self, widget):
         try:
             path_names = self.main_window.select_folder_dialog(
@@ -81,6 +108,17 @@ def action_select_folder_dialog(self, widget):
         except ValueError:
             self.label.text = "Folder select dialog was canceled"
 
+    async def action_select_folder_dialog_android(self, widget):
+        try:
+            selected_uri = ''
+            selected_uri = await self.app.main_window.select_folder_dialog("Choose a folder",
+                                                                           multiselect=False)
+            self.label.text = "You selected: " + str(selected_uri)
+        except ValueError as e:
+            selected_uri = str(e)
+            self.label.text = selected_uri
+        print(str(selected_uri))
+
     def action_select_folder_dialog_multi(self, widget):
         try:
             path_names = self.main_window.select_folder_dialog(
@@ -91,6 +129,9 @@ def action_select_folder_dialog_multi(self, widget):
         except ValueError:
             self.label.text = "Folders select dialog was canceled"
 
+    async def action_select_folder_dialog_multi_android(self, widget):
+        self.label.text = "Multiple folder selection is not supported"
+
     def action_save_file_dialog(self, widget):
         fname = 'Toga_file.txt'
         try:
@@ -180,62 +221,101 @@ def startup(self):
         btn_question = toga.Button('Question', on_press=self.action_question_dialog, style=btn_style)
         btn_confirm = toga.Button('Confirm', on_press=self.action_confirm_dialog, style=btn_style)
         btn_error = toga.Button('Error', on_press=self.action_error_dialog, style=btn_style)
-        btn_open = toga.Button('Open File', on_press=self.action_open_file_dialog, style=btn_style)
-        btn_open_filtered = toga.Button(
-            'Open File (Filtered)',
-            on_press=self.action_open_file_filtered_dialog,
-            style=btn_style
-        )
-        btn_open_multi = toga.Button(
-            'Open File (Multiple)',
-            on_press=self.action_open_file_dialog_multi,
-            style=btn_style
-        )
-        btn_save = toga.Button('Save File', on_press=self.action_save_file_dialog, style=btn_style)
-        btn_select = toga.Button('Select Folder', on_press=self.action_select_folder_dialog, style=btn_style)
-        btn_select_multi = toga.Button(
-            'Select Folders',
-            on_press=self.action_select_folder_dialog_multi,
-            style=btn_style
-        )
-        btn_open_secondary_window = toga.Button(
-            'Open Secondary Window',
-            on_press=self.action_open_secondary_window,
-            style=btn_style
-        )
-        btn_close_secondary_window = toga.Button(
-            'Close All Secondary Windows',
-            on_press=self.action_close_secondary_windows,
-            style=btn_style
-        )
+        if toga.platform.current_platform == 'android':
+            btn_open = toga.Button('Open File', on_press=self.action_open_file_dialog_android, style=btn_style)
+            btn_open_filtered = toga.Button(
+                'Open File (Filtered)',
+                on_press=self.action_open_file_filtered_dialog_android,
+                style=btn_style
+            )
+            btn_open_multi = toga.Button(
+                'Open File (Multiple)',
+                on_press=self.action_open_file_dialog_multi_android,
+                style=btn_style
+            )
+            btn_select = toga.Button('Select Folder',
+                                     on_press=self.action_select_folder_dialog_android, style=btn_style)
+            btn_select_multi = toga.Button(
+                'Select Folders',
+                on_press=self.action_select_folder_dialog_multi_android, style=btn_style
+            )
+        else:
+            btn_open = toga.Button('Open File', on_press=self.action_open_file_dialog, style=btn_style)
+            btn_open_filtered = toga.Button(
+                'Open File (Filtered)',
+                on_press=self.action_open_file_filtered_dialog,
+                style=btn_style
+            )
+            btn_open_multi = toga.Button(
+                'Open File (Multiple)',
+                on_press=self.action_open_file_dialog_multi,
+                style=btn_style
+            )
+            btn_save = toga.Button('Save File', on_press=self.action_save_file_dialog, style=btn_style)
+            btn_select = toga.Button('Select Folder', on_press=self.action_select_folder_dialog, style=btn_style)
+            btn_select_multi = toga.Button(
+                'Select Folders',
+                on_press=self.action_select_folder_dialog_multi,
+                style=btn_style
+            )
+            btn_open_secondary_window = toga.Button(
+                'Open Secondary Window',
+                on_press=self.action_open_secondary_window,
+                style=btn_style
+            )
+            btn_close_secondary_window = toga.Button(
+                'Close All Secondary Windows',
+                on_press=self.action_close_secondary_windows,
+                style=btn_style
+            )
 
         btn_clear = toga.Button('Clear', on_press=self.do_clear, style=btn_style)
 
         # Outermost box
-        box = toga.Box(
-            children=[
-                btn_info,
-                btn_question,
-                btn_confirm,
-                btn_error,
-                btn_open,
-                btn_open_filtered,
-                btn_save,
-                btn_select,
-                btn_select_multi,
-                btn_open_multi,
-                btn_open_secondary_window,
-                btn_close_secondary_window,
-                btn_clear,
-                self.label,
-                self.window_label
-            ],
-            style=Pack(
-                flex=1,
-                direction=COLUMN,
-                padding=10
+        if toga.platform.current_platform == 'android':
+            box = toga.Box(
+                children=[
+                    btn_info,
+                    btn_open,
+                    btn_open_filtered,
+                    btn_select,
+                    btn_select_multi,
+                    btn_open_multi,
+                    btn_clear,
+                    self.label,
+                    self.window_label
+                ],
+                style=Pack(
+                    flex=1,
+                    direction=COLUMN,
+                    padding=10
+                )
+            )
+        else:
+                box = toga.Box(
+                children=[
+                    btn_info,
+                    btn_question,
+                    btn_confirm,
+                    btn_error,
+                    btn_open,
+                    btn_open_filtered,
+                    btn_save,
+                    btn_select,
+                    btn_select_multi,
+                    btn_open_multi,
+                    btn_open_secondary_window,
+                    btn_close_secondary_window,
+                    btn_clear,
+                    self.label,
+                    self.window_label
+                ],
+                style=Pack(
+                    flex=1,
+                    direction=COLUMN,
+                    padding=10
+                )
             )
-        )
 
         # Add the content on the main window
         self.main_window.content = box

examples/dialogs/pyproject.toml

@@ -14,7 +14,9 @@ author_email = "[email protected]"
 formal_name = "Dialog Demo"
 description = "A testing app"
 sources = ['dialogs']
-requires = []
+requires = [
+	'c:/Projects/Python/Toga/src/core'
+]
 
 
 [tool.briefcase.app.dialogs.macOS]
@@ -40,5 +42,6 @@ requires = [
 
 [tool.briefcase.app.dialogs.android]
 requires = [
-    'toga-android',
+    #'toga-android',
+	'c:/Projects/Python/Toga/src/android'
 ]

src/android/toga_android/app.py

@@ -7,6 +7,7 @@
 from .window import Window
 
 
+
 # `MainWindow` is defined here in `app.py`, not `window.py`, to mollify the test suite.
 class MainWindow(Window):
     pass
@@ -137,3 +138,4 @@ async def intent_result(self, intent):
         self.native.startActivityForResult(intent, code)
         await result_future
         return result_future.result()
+

src/android/toga_android/libs/activity.py

@@ -1,5 +1,7 @@
 from rubicon.java import JavaClass, JavaInterface
 
+Activity = JavaClass("android/app/Activity")
+
 # The Android cookiecutter template creates an app whose main Activity is
 # called `MainActivity`. The activity assumes that we will store a reference
 # to an implementation/subclass of `IPythonApp` in it.

src/android/toga_android/libs/android/net.py

@@ -0,0 +1,3 @@
+from rubicon.java import JavaClass
+
+Uri = JavaClass("android/net/Uri")

src/android/toga_android/window.py

@@ -1,5 +1,8 @@
 from . import dialogs
+from .libs.activity import Activity
 from .libs.android import R__attr
+from .libs.android.content import Intent
+from .libs.android.net import Uri
 from .libs.android.util import TypedValue
 
 
@@ -104,3 +107,89 @@ def stack_trace_dialog(self, title, message, content, retry=False):
 
     def save_file_dialog(self, title, suggested_filename, file_types):
         self.interface.factory.not_implemented('Window.save_file_dialog()')
+
+    async def open_file_dialog(self, title, initial_uri, file_mime_types, multiselect):
+        """
+        Opens a file chooser dialog and returns the chosen file as content URI.
+        Raises a ValueError when nothing has been selected
+
+        :param str title: The title is ignored on Android
+        :param initial_uri: The initial location shown in the file chooser. Must be a content URI, e.g.
+            'content://com.android.externalstorage.documents/document/primary%3ADownload%2FTest-dir'
+        :type initial_uri: str or None
+        :param file_mime_types: The file types allowed to select. Must be MIME types, e.g.
+               ['application/pdf','application/vnd.openxmlformats-officedocument.spreadsheetml.sheet'].
+               Currently ignored to avoid error in rubicon
+        :type file_mime_types: list[str] or None
+        :param bool multiselect: If True, then several files can be selected
+        :returns: The content URI of the chosen file or a list of content URIs when multiselect=True.
+        :rtype: str or list[str]
+        """
+        print('Invoking Intent ACTION_OPEN_DOCUMENT')
+        intent = Intent(Intent.ACTION_OPEN_DOCUMENT)
+        intent.addCategory(Intent.CATEGORY_OPENABLE)
+        intent.setType("*/*")
+        if initial_uri is not None and initial_uri != '':
+            intent.putExtra("android.provider.extra.INITIAL_URI", Uri.parse(initial_uri))
+        if file_mime_types is not None and file_mime_types != ['']:
+            # Commented out because rubicon currently does not support arrays and nothing else works with this Intent
+            # see https://github.com/beeware/rubicon-java/pull/53
+            # intent.putExtra(Intent.EXTRA_MIME_TYPES, file_mime_types)
+            self.interface.factory.not_implemented(
+                'Window.open_file_dialog() on Android currently does not support the file_type parameter')
+        intent.putExtra(Intent.EXTRA_ALLOW_MULTIPLE, multiselect)
+        selected_uri = None
+        result = await self.app.intent_result(intent)
+        if result["resultCode"] == Activity.RESULT_OK:
+            if result["resultData"] is not None:
+                selected_uri = result["resultData"].getData()
+                if multiselect:
+                    if selected_uri is None:
+                        # when the user selects more than 1 file, getData() will be None. Instead, getClipData() will
+                        # contain the list of chosen files
+                        selected_uri = []
+                        clip_data = result["resultData"].getClipData()
+                        if clip_data is not None:  # just to be sure there will never be a null reference exception...
+                            for i in range(0, clip_data.getItemCount()):
+                                selected_uri.append(str(clip_data.getItemAt(i).getUri()))
+                    else:
+                        selected_uri = [str(selected_uri)]
+        if selected_uri is None:
+            raise ValueError("No filename provided in the open file dialog")
+        return selected_uri
+
+    async def select_folder_dialog(self, title, initial_uri=None, multiselect=False):
+        """
+        Opens a folder chooser dialog and returns the chosen folder as content URI.
+        Raises a ValueError when nothing has been selected
+
+        :param str title: The title is ignored on Android
+        :param initial_uri: The initial location shown in the file chooser. Must be a content URI, e.g.
+            'content://com.android.externalstorage.documents/document/primary%3ADownload%2FTest-dir'
+        :type initial_uri: str or None
+        :param bool multiselect: If True, then several files can be selected
+        :returns: The content tree URI of the chosen folder or a list of content URIs when multiselect=True.
+        :rtype: str or list[str]
+        """
+        print('Invoking Intent ACTION_OPEN_DOCUMENT_TREE')
+        intent = Intent(Intent.ACTION_OPEN_DOCUMENT_TREE)
+        if initial_uri is not None and initial_uri != '':
+            intent.putExtra("android.provider.extra.INITIAL_URI", Uri.parse(initial_uri))
+        intent.putExtra(Intent.EXTRA_ALLOW_MULTIPLE, multiselect)
+        selected_uri = None
+        result = await self.app.intent_result(intent)
+        if result["resultCode"] == Activity.RESULT_OK:
+            if result["resultData"] is not None:
+                selected_uri = result["resultData"].getData()
+                if multiselect is True:
+                    if selected_uri is None:
+                        selected_uri = []
+                        clip_data = result["resultData"].getClipData()
+                        if clip_data is not None:
+                            for i in range(0, clip_data.getItemCount()):
+                                selected_uri.append(str(clip_data.getItemAt(i).getUri()))
+                    else:
+                        selected_uri = [str(selected_uri)]
+        if selected_uri is None:
+            raise ValueError("No folder provided in the open folder dialog")
+        return selected_uri