From 473752606777e740dbe2c8aaf615e46518a7eab4 Mon Sep 17 00:00:00 2001
From: arkon <eugcheung94@gmail.com>
Date: Sun, 19 Nov 2023 15:10:26 -0500
Subject: [PATCH] Use custom threshold for what's consider a low RAM device

(cherry picked from commit 8857b7e0c1a908c1853742b05d7aca7c63880dc9)
---
 app/src/main/java/eu/kanade/tachiyomi/App.kt    |  5 ++---
 .../kanade/tachiyomi/util/system/DeviceUtil.kt  | 17 +++++++++++++++++
 2 files changed, 19 insertions(+), 3 deletions(-)

diff --git a/app/src/main/java/eu/kanade/tachiyomi/App.kt b/app/src/main/java/eu/kanade/tachiyomi/App.kt
index 2739d61e4..1eb312189 100755
--- a/app/src/main/java/eu/kanade/tachiyomi/App.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/App.kt
@@ -1,7 +1,6 @@
 package eu.kanade.tachiyomi
 
 import android.annotation.SuppressLint
-import android.app.ActivityManager
 import android.app.Application
 import android.app.PendingIntent
 import android.content.BroadcastReceiver
@@ -13,7 +12,6 @@ import android.os.Environment
 import android.os.Looper
 import android.webkit.WebView
 import androidx.core.content.ContextCompat
-import androidx.core.content.getSystemService
 import androidx.lifecycle.DefaultLifecycleObserver
 import androidx.lifecycle.LifecycleOwner
 import androidx.lifecycle.ProcessLifecycleOwner
@@ -52,6 +50,7 @@ import eu.kanade.tachiyomi.di.SYPreferenceModule
 import eu.kanade.tachiyomi.network.NetworkHelper
 import eu.kanade.tachiyomi.network.NetworkPreferences
 import eu.kanade.tachiyomi.ui.base.delegate.SecureActivityDelegate
+import eu.kanade.tachiyomi.util.system.DeviceUtil
 import eu.kanade.tachiyomi.util.system.WebViewUtil
 import eu.kanade.tachiyomi.util.system.animatorDurationScale
 import eu.kanade.tachiyomi.util.system.cancelNotification
@@ -184,7 +183,7 @@ class App : Application(), DefaultLifecycleObserver, ImageLoaderFactory {
             callFactory(callFactoryInit)
             diskCache(diskCacheInit)
             crossfade((300 * this@App.animatorDurationScale).toInt())
-            allowRgb565(getSystemService<ActivityManager>()!!.isLowRamDevice)
+            allowRgb565(DeviceUtil.isLowRamDevice(this@App))
             if (networkPreferences.verboseLogging().get()) logger(DebugLogger())
 
             // Coil spawns a new thread for every image load by default
diff --git a/core/src/main/java/eu/kanade/tachiyomi/util/system/DeviceUtil.kt b/core/src/main/java/eu/kanade/tachiyomi/util/system/DeviceUtil.kt
index 9e0177129..e2011f0c5 100644
--- a/core/src/main/java/eu/kanade/tachiyomi/util/system/DeviceUtil.kt
+++ b/core/src/main/java/eu/kanade/tachiyomi/util/system/DeviceUtil.kt
@@ -1,7 +1,10 @@
 package eu.kanade.tachiyomi.util.system
 
 import android.annotation.SuppressLint
+import android.app.ActivityManager
+import android.content.Context
 import android.os.Build
+import androidx.core.content.getSystemService
 import logcat.LogPriority
 import tachiyomi.core.util.system.logcat
 
@@ -65,6 +68,20 @@ object DeviceUtil {
         "com.zui.resolver",
     )
 
+    /**
+     * ActivityManager#isLowRamDevice is based on a system property, which isn't
+     * necessarily trustworthy. 1GB is supposedly the regular threshold.
+     *
+     * Instead, we consider anything with less than 3GB of RAM as low memory
+     * considering how heavy image processing can be.
+     */
+    fun isLowRamDevice(context: Context): Boolean {
+        val memInfo = ActivityManager.MemoryInfo()
+        context.getSystemService<ActivityManager>()!!.getMemoryInfo(memInfo)
+        val totalMemBytes = memInfo.totalMem
+        return totalMemBytes < 3L * 1024 * 1024 * 1024
+    }
+
     @SuppressLint("PrivateApi")
     private fun getSystemProperty(key: String?): String? {
         return try {