'Add' support for Android GameActivity entry point

Documentation~/index.md

@@ -161,20 +161,18 @@ If you need to recompile AAR library, for example, change `compileSdk` or `minSd
 
 ### Manifest
 
-Patch manifest and make sure your `AndroidManifest.xml` has the following setting:
-
-```xml
-<activity android:name="com.unity3d.player.UnityPlayerActivity" android:label="@string/app_name" android:windowSoftInputMode="adjustNothing">
-    ...
-    <meta-data android:name="unityplayer.ForwardNativeEventsToDalvik" android:value="true" />
-    ...
-</activity>
-```
-
-The `adjustNothing` option has been added to prevent the screen from shifting up when the keyboard is displayed. 
+UMI will patch your manifest at build time with the required settings in a way that plays nicely with other plugins/frameworks. It adds the `adjustNothing` option to your entry activity which will prevent the screen from shifting up when the keyboard is displayed.
 
 > [!NOTE] 
-> Activity name may vary
+> If UMI is unable to patch your manifest automatically, it'll warn you about it when you build your game. In this case, you can make the changes to your manifest yourself. Make sure your `AndroidManifest.xml` has the following setting (Your activity name may vary):
+> ```xml
+><activity android:name="com.unity3d.player.UnityPlayerActivity" android:label="@string/app_name" android:windowSoftInputMode="adjustNothing">
+>    ...
+>    <meta-data android:name="unityplayer.ForwardNativeEventsToDalvik" android:value="true" />
+>    ...
+></activity>
+>```
+
 
 ## iOS
 

Editor/AndroidManifestPatcher.cs

@@ -0,0 +1,52 @@
+#if UNITY_EDITOR && UNITY_ANDROID
+using UnityEngine;
+using System.IO;
+using System.Linq;
+using System.Xml.Linq;
+using UnityEditor.Android;
+
+namespace UMI {
+    public class AndroidManifestPatcher : IPostGenerateGradleAndroidProject {
+        public int callbackOrder => 0;
+
+        public void OnPostGenerateGradleAndroidProject(string path) {
+            XNamespace android = "http://schemas.android.com/apk/res/android";
+            var manifestPath = Path.Combine(path, "src", "main", "AndroidManifest.xml");
+
+            if (!File.Exists(manifestPath)) {
+                WarnAboutFailure("Unable to locate and patch your Android Manifest");
+                return;
+            }
+
+            var doc = XDocument.Load(manifestPath);
+
+            // Find the first activity that has an intent-filter with MAIN + LAUNCHER
+            // This works for both classic Activity and GameActivity (2023.1+) application entry
+            var activity = doc
+                .Descendants("activity")
+                .FirstOrDefault(a =>
+                    a.Elements("intent-filter").Any(f =>
+                        f.Elements("action")
+                        .Any(x => (string)x.Attribute(android + "name") == "android.intent.action.MAIN") &&
+                        f.Elements("category")
+                        .Any(x => (string)x.Attribute(android + "name") == "android.intent.category.LAUNCHER")
+                    )
+                );
+
+            if (activity == null) {
+                WarnAboutFailure("Unable to locate the main launcher activity in your AndroidManifest.xml");
+                return;
+            }
+            activity.SetAttributeValue(android + "windowSoftInputMode", "adjustNothing");
+            doc.Save(manifestPath);
+#if UMI_DEBUG
+            Debug.Log($"[UMI] Patched AndroidManifest.xml at {manifestPath} with 'adjustNothing' for windowSoftInputMode.");
+#endif
+
+            void WarnAboutFailure(string reason) {
+                Debug.LogWarning($"[UMI] {reason}. Please refer to the documentation and ensure you've updated your AndroidManifest.xml manually with the required changes.");
+            }
+        }
+    }
+}
+#endif

README.md

@@ -163,17 +163,7 @@ The iOS plugin is simple, with only 3 files. If you want to know how it works un
 
 Android plugin is a compiled AAR library. All sources are available in [Android~](./Android~/) folder. You can edit the android part and recompile the library to suit your needs.
 
-Make sure your `AndroidManifest.xml` has the following setting:
-
-```xml
-<activity android:name="com.unity3d.player.UnityPlayerActivity" android:label="@string/app_name" android:windowSoftInputMode="adjustNothing">
-    ...
-    <meta-data android:name="unityplayer.ForwardNativeEventsToDalvik" android:value="true" />
-    ...
-</activity>
-```
-
-The `adjustNothing` option has been added to prevent the screen from shifting up when the keyboard is displayed.
+Your Android Manifest will be patched automatically at build time with the required settings. Refer to the [docs](Documentation~/index.md#manifest) for details on what is being changed.
 
 ### Unity