Initial commit

compat/src/main/AndroidManifest.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="de.mm20.launcher2.compat">
+
+</manifest>

compat/src/main/java/de/mm20/launcher2/compat/PackageManagerCompat.kt

@@ -0,0 +1,33 @@
+package de.mm20.launcher2.compat
+
+import android.content.pm.PackageManager
+import android.os.Build
+
+object PackageManagerCompat {
+    fun getInstallSource(
+        packageManager: PackageManager,
+        packageName: String
+    ): InstallSourceInfoCompat {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
+            val installSourceInfo = packageManager.getInstallSourceInfo(packageName)
+            return InstallSourceInfoCompat(
+                originatingPackageName = installSourceInfo.originatingPackageName,
+                initiatingPackageName = installSourceInfo.initiatingPackageName,
+                installingPackageName = installSourceInfo.installingPackageName,
+            )
+        } else {
+            val installerPackageName = packageManager.getInstallerPackageName(packageName)
+            return InstallSourceInfoCompat(
+                originatingPackageName = installerPackageName,
+                initiatingPackageName = installerPackageName,
+                installingPackageName = installerPackageName
+            )
+        }
+    }
+}
+
+data class InstallSourceInfoCompat(
+    val originatingPackageName: String?,
+    val initiatingPackageName: String?,
+    val installingPackageName: String?
+)