create snaptarget instances using Unsafe

this removes a lot of sdk int checks
and should be more reliable since the constructor parameters cannot be randomly swapped anymore

Author: programminghoch10

SplitScreenMods/build.gradle.kts

@@ -17,4 +17,5 @@ dependencies {
     implementation(libs.androidx.fragment.ktx)
     implementation(libs.androidx.preference.ktx)
     implementation(project(":logger"))
+    compileOnly(libs.androidx.performance.unsafe)
 }

SplitScreenMods/src/main/java/com/programminghoch10/SplitScreenMods/AdditionalSnapTargetsHook.kt

@@ -14,6 +14,7 @@ import de.robv.android.xposed.XposedBridge
 import de.robv.android.xposed.XposedHelpers
 import de.robv.android.xposed.callbacks.XC_InitPackageResources
 import de.robv.android.xposed.callbacks.XC_LoadPackage
+import sun.misc.Unsafe
 
 // https://github.com/LineageOS/android_frameworks_base/blob/f0964915f5992fd38cf1e5e3f87c0d3ac719aa09/libs/WindowManager/Shell/shared/src/com/android/wm/shell/shared/split/SplitScreenConstants.java
 const val SNAP_TO_2_33_66 = 0
@@ -42,21 +43,14 @@ class AdditionalSnapTargetsHook : IXposedHookLoadPackage, IXposedHookInitPackage
 
         val DividerSnapAlgorithmClass = XposedHelpers.findClass("com.android.wm.shell.common.split.DividerSnapAlgorithm", lpparam.classLoader)
         val SnapTargetClass = XposedHelpers.findClass(DividerSnapAlgorithmClass.name + "\$SnapTarget", lpparam.classLoader)
-        val SnapTargetClassConstructor = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.VANILLA_ICE_CREAM) XposedHelpers.findConstructorExact(
-            SnapTargetClass,
-            Int::class.java,
-            Int::class.java,
-        )
-        else XposedHelpers.findConstructorExact(
-            SnapTargetClass,
-            Int::class.java,
-            Int::class.java,
-            Int::class.java,
-        )
-        
+        val UnsafeClass = XposedHelpers.findClass("sun.misc.Unsafe",lpparam.classLoader)
+        val unsafe = XposedHelpers.callStaticMethod(UnsafeClass, "getUnsafe") as Unsafe
         fun createNewSnapTargetInstance(position: Int, snapPosition: Int): Any {
-            return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.VANILLA_ICE_CREAM) SnapTargetClassConstructor.newInstance(position, snapPosition)
-            else SnapTargetClassConstructor.newInstance(position, 0, snapPosition)
+            val snapTarget = unsafe.allocateInstance(SnapTargetClass)
+            XposedHelpers.setIntField(snapTarget, "position", position)
+            XposedHelpers.setIntField(snapTarget, "snapPosition", snapPosition)
+            XposedHelpers.setFloatField(snapTarget, "distanceMultiplier", 1f)
+            return snapTarget
         }
 
         XposedBridge.hookAllConstructors(DividerSnapAlgorithmClass, object : XC_MethodHook() {

gradle/libs.versions.toml

@@ -11,6 +11,7 @@ hiddenapibypass = "6.1"
 jebrainsAnnotations = "26.0.2-1"
 kotlin = "2.2.20"
 libsu = "6.0.0"
+performanceUnsafe = "1.0.0-alpha01"
 preference = "1.2.1"
 xposed = "82"
 
@@ -22,6 +23,7 @@ androidx-annotation = { module = "androidx.annotation:annotation", version.ref =
 androidx-collection-ktx = { module = "androidx.collection:collection-ktx", version.ref = "collection" }
 androidx-core-ktx = { module = "androidx.core:core-ktx", version.ref = "core" }
 androidx-fragment-ktx = { group = "androidx.fragment", name = "fragment-ktx", version.ref = "fragment" }
+androidx-performance-unsafe = { module = "androidx.performance:performance-unsafe", version.ref = "performanceUnsafe" }
 androidx-preference = { group = "androidx.preference", name = "preference", version.ref = "preference" }
 androidx-preference-ktx = { group = "androidx.preference", name = "preference-ktx", version.ref = "preference" }
 github-api = { module = "org.kohsuke:github-api", version.ref = "githubApi" }