init instant note editor activity

* setup the style and manifest file to make activity transparent and single instance

AnkiDroid/src/main/AndroidManifest.xml

@@ -587,6 +587,22 @@
          -->
         <meta-data android:name="android.webkit.WebView.MetricsOptOut" android:value="true" />
 
+        <!--
+        Transparent Single instance activity, and is cleared from recent tasks as we want to mimic
+        the behaviour of not opening the application and still be able to access the dialog.
+        Task affinity allows us to separate the activity allowing us to define that an activity belongs to a
+        different task, it ensures that the activity does not interfere with other tasks in our application.
+         -->
+        <activity
+            android:name="com.ichi2.anki.instantnoteeditor.InstantNoteEditorActivity"
+            android:exported="false"
+            android:label="@string/instant_card"
+            android:launchMode="singleInstance"
+            android:excludeFromRecents="true"
+            android:taskAffinity=""
+            android:theme="@style/Theme.AppCompat.Transparent.NoActionBar" >
+        </activity>
+
 
 
         <provider

AnkiDroid/src/main/java/com/ichi2/anki/instantnoteeditor/InstantNoteEditorActivity.kt

@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 2024 Ashish Yadav <[email protected]>
+ *
+ * This program is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free Software
+ * Foundation; either version 3 of the License, or (at your option) any later
+ * version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.ichi2.anki.instantnoteeditor
+
+import android.os.Bundle
+import androidx.activity.enableEdgeToEdge
+import com.ichi2.anki.AnkiActivity
+import com.ichi2.anki.R
+import com.ichi2.themes.setTransparentBackground
+
+/**
+ * Single instance Activity for instantly editing and adding cloze card/s without actually opening the app,
+ * uses a custom dialog layout and a transparent activity theme to achieve the functionality.
+ **/
+class InstantNoteEditorActivity : AnkiActivity() {
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        if (showedActivityFailedScreen(savedInstanceState)) {
+            return
+        }
+        super.onCreate(savedInstanceState)
+        if (!ensureStoragePermissions()) {
+            return
+        }
+        setTransparentBackground()
+        enableEdgeToEdge()
+        setContentView(R.layout.activity_instant_note_editor)
+        onDestroy()
+    }
+}

AnkiDroid/src/main/java/com/ichi2/themes/Themes.kt

@@ -22,6 +22,7 @@ import android.content.Context
 import android.content.SharedPreferences
 import android.content.res.Configuration
 import android.graphics.Color
+import android.graphics.drawable.ColorDrawable
 import androidx.annotation.AttrRes
 import androidx.annotation.ColorInt
 import androidx.appcompat.app.AppCompatDelegate
@@ -149,3 +150,7 @@ fun FragmentActivity.setTransparentStatusBar() {
         !Themes.currentTheme.isNightMode
     window.statusBarColor = Color.TRANSPARENT
 }
+
+fun FragmentActivity.setTransparentBackground() {
+    window.setBackgroundDrawable(ColorDrawable(Color.TRANSPARENT))
+}

AnkiDroid/src/main/res/layout/activity_instant_note_editor.xml

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="utf-8"?><!--
+  ~ Copyright (c) 2024 Ashish Yadav <[email protected]>
+  ~
+  ~ This program is free software; you can redistribute it and/or modify it under
+  ~ the terms of the GNU General Public License as published by the Free Software
+  ~ Foundation; either version 3 of the License, or (at your option) any later
+  ~ version.
+  ~
+  ~ This program is distributed in the hope that it will be useful, but WITHOUT ANY
+  ~ WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+  ~ FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
+  ~ details.
+  ~
+  ~ You should have received a copy of the GNU General Public License along with
+  ~ this program.  If not, see <http://www.gnu.org/licenses/>.
+  -->
+
+<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:id="@+id/root_layout"
+    android:layout_height="match_parent" >
+
+</androidx.coordinatorlayout.widget.CoordinatorLayout>

AnkiDroid/src/main/res/values/01-core.xml

@@ -285,4 +285,7 @@
     <string name="image_occlusion">Image Occlusion</string>
 
     <string name="remove_account" comment="open a website to start the deletion of an AnkiWeb account">Remove account</string>
+
+    <!-- Instant Note Editor -->
+    <string name="instant_card" comment="This does not need to be translated literally, translate the concept of quickly adding a Cloze note with a popup. Used in the Android system context menu/share dialog.">Instant card</string>
 </resources>

AnkiDroid/src/main/res/values/styles.xml

@@ -230,4 +230,12 @@
         <item name="android:elevation">0.8dp</item>
     </style>
 
+    <style name="Theme.AppCompat.Transparent.NoActionBar" parent="Theme.AppCompat.Light.DarkActionBar">
+        <item name="android:windowBackground">@android:color/transparent</item>
+        <item name="android:windowNoTitle">true</item>
+        <item name="android:windowIsFloating">true</item>
+        <item name="android:backgroundDimEnabled">false</item>
+        <item name="android:alertDialogStyle">@style/AlertDialogStyle</item>
+    </style>
+
 </resources>

AnkiDroid/src/test/java/com/ichi2/anki/ActivityStartupUnderBackupTest.kt

@@ -18,6 +18,7 @@ package com.ichi2.anki
 import android.app.Activity
 import android.os.Looper.getMainLooper
 import com.canhub.cropper.CropImageActivity
+import com.ichi2.anki.instantnoteeditor.InstantNoteEditorActivity
 import com.ichi2.anki.preferences.Preferences
 import com.ichi2.testutils.ActivityList
 import com.ichi2.testutils.ActivityList.ActivityLaunchParam
@@ -54,6 +55,7 @@ class ActivityStartupUnderBackupTest : RobolectricTest() {
         notYetHandled(Preferences::class.java.simpleName, "Not working (or implemented) - inherits from AppCompatPreferenceActivity")
         notYetHandled(FilteredDeckOptions::class.java.simpleName, "Not working (or implemented) - inherits from AppCompatPreferenceActivity")
         notYetHandled(SingleFragmentActivity::class.java.simpleName, "Implemented, but the test fails because the activity throws if a specific intent extra isn't set")
+        notYetHandled(InstantNoteEditorActivity::class.java.simpleName, "Single instance activity so should be used")
     }
 
     /**

AnkiDroid/src/test/java/com/ichi2/testutils/ActivityList.kt

@@ -23,6 +23,7 @@ import com.canhub.cropper.CropImageActivity
 import com.ichi2.anki.*
 import com.ichi2.anki.CardTemplateBrowserAppearanceEditor.Companion.INTENT_ANSWER_FORMAT
 import com.ichi2.anki.CardTemplateBrowserAppearanceEditor.Companion.INTENT_QUESTION_FORMAT
+import com.ichi2.anki.instantnoteeditor.InstantNoteEditorActivity
 import com.ichi2.anki.multimediacard.activity.MultimediaEditFieldActivity
 import com.ichi2.anki.notetype.ManageNotetypes
 import com.ichi2.anki.preferences.Preferences
@@ -73,7 +74,8 @@ object ActivityList {
             get(ManageSpaceActivity::class.java),
             get(PermissionsActivity::class.java),
             get(SingleFragmentActivity::class.java),
-            get(CardViewerActivity::class.java)
+            get(CardViewerActivity::class.java),
+            get(InstantNoteEditorActivity::class.java)
         )
     }