From 5537f6c60a72ec29fcb4a2781e039dff00a1fcae Mon Sep 17 00:00:00 2001
From: Kleidis <kleidis1@protonmail.com>
Date: Mon, 1 Dec 2025 16:27:38 +0100
Subject: [PATCH] [android]: Force app to use the displays max set refresh rate

Since Android 15, google automatically forces "games" to be 60 hrz. This ensures the display's max refresh rate is actually used. Tested on a Google Pixel 7 Pro with Android 16

Emulation Activity was excluded for battery usage concerns
---
 .../features/settings/ui/SettingsActivity.kt  |  7 +++++
 .../citra/citra_emu/ui/main/MainActivity.kt   |  7 +++++
 .../citra_emu/utils/SetMaxRefreshRate.kt      | 26 +++++++++++++++++++
 3 files changed, 40 insertions(+)
 create mode 100644 src/android/app/src/main/java/org/citra/citra_emu/utils/SetMaxRefreshRate.kt

diff --git a/src/android/app/src/main/java/org/citra/citra_emu/features/settings/ui/SettingsActivity.kt b/src/android/app/src/main/java/org/citra/citra_emu/features/settings/ui/SettingsActivity.kt
index 070a8f487..1ae915e5a 100644
--- a/src/android/app/src/main/java/org/citra/citra_emu/features/settings/ui/SettingsActivity.kt
+++ b/src/android/app/src/main/java/org/citra/citra_emu/features/settings/ui/SettingsActivity.kt
@@ -7,6 +7,7 @@ package org.citra.citra_emu.features.settings.ui
 import android.content.Context
 import android.content.Intent
 import android.net.Uri
+import android.os.Build
 import android.os.Bundle
 import android.view.View
 import android.view.ViewGroup.MarginLayoutParams
@@ -37,6 +38,7 @@ import org.citra.citra_emu.features.settings.utils.SettingsFile
 import org.citra.citra_emu.utils.SystemSaveGame
 import org.citra.citra_emu.utils.DirectoryInitialization
 import org.citra.citra_emu.utils.InsetsHelper
+import org.citra.citra_emu.utils.MaxRefreshRate
 import org.citra.citra_emu.utils.ThemeUtil
 
 class SettingsActivity : AppCompatActivity(), SettingsActivityView {
@@ -54,6 +56,11 @@ class SettingsActivity : AppCompatActivity(), SettingsActivityView {
         super.onCreate(savedInstanceState)
 
         binding = ActivitySettingsBinding.inflate(layoutInflater)
+
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
+            MaxRefreshRate.set(this)
+        }
+
         setContentView(binding.root)
 
         WindowCompat.setDecorFitsSystemWindows(window, false)
diff --git a/src/android/app/src/main/java/org/citra/citra_emu/ui/main/MainActivity.kt b/src/android/app/src/main/java/org/citra/citra_emu/ui/main/MainActivity.kt
index 37bff3396..471a78cfa 100644
--- a/src/android/app/src/main/java/org/citra/citra_emu/ui/main/MainActivity.kt
+++ b/src/android/app/src/main/java/org/citra/citra_emu/ui/main/MainActivity.kt
@@ -6,6 +6,7 @@ package org.citra.citra_emu.ui.main
 
 import android.content.Intent
 import android.net.Uri
+import android.os.Build
 import android.os.Bundle
 import android.view.View
 import android.view.ViewGroup.MarginLayoutParams
@@ -51,6 +52,7 @@ import org.citra.citra_emu.utils.CitraDirectoryUtils
 import org.citra.citra_emu.utils.DirectoryInitialization
 import org.citra.citra_emu.utils.FileBrowserHelper
 import org.citra.citra_emu.utils.InsetsHelper
+import org.citra.citra_emu.utils.MaxRefreshRate
 import org.citra.citra_emu.utils.PermissionsHandler
 import org.citra.citra_emu.utils.ThemeUtil
 import org.citra.citra_emu.viewmodel.GamesViewModel
@@ -86,6 +88,11 @@ class MainActivity : AppCompatActivity(), ThemeProvider {
         super.onCreate(savedInstanceState)
 
         binding = ActivityMainBinding.inflate(layoutInflater)
+
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
+            MaxRefreshRate.set(this)
+        }
+
         setContentView(binding.root)
 
         WindowCompat.setDecorFitsSystemWindows(window, false)
diff --git a/src/android/app/src/main/java/org/citra/citra_emu/utils/SetMaxRefreshRate.kt b/src/android/app/src/main/java/org/citra/citra_emu/utils/SetMaxRefreshRate.kt
new file mode 100644
index 000000000..49a7ff15d
--- /dev/null
+++ b/src/android/app/src/main/java/org/citra/citra_emu/utils/SetMaxRefreshRate.kt
@@ -0,0 +1,26 @@
+// Copyright Citra Emulator Project / Azahar Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+package org.citra.citra_emu.utils
+import android.app.Activity
+import android.os.Build
+import androidx.annotation.RequiresApi
+
+object MaxRefreshRate {
+    @RequiresApi(Build.VERSION_CODES.R)
+    fun set(activity: Activity) {
+        val display = activity.display
+        val window = activity.window
+        display?.let {
+            val supportedModes = it.supportedModes
+            val maxRefreshRate = supportedModes.maxByOrNull { mode -> mode.refreshRate }
+
+            if (maxRefreshRate != null) {
+                val layoutParams = window.attributes
+                layoutParams.preferredDisplayModeId = maxRefreshRate.modeId
+                window.attributes = layoutParams
+            }
+        }
+    }
+}
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