get apk path from Unity

Author: noodle1983

Assets/AndroidIl2cppPatchDemo/Plugins/Android/libs/arm64-v8a/libbootstrap.so

@@ -10,10 +10,10 @@ public class Bootstrap
     public static extern string get_arch_abi();
 
     [DllImport("bootstrap")]
-    public static extern string use_data_dir(string _data_path);
+    public static extern string use_data_dir(string _data_path, string _apk_path);
 #else
     public static string get_arch_abi() { return "armeabi-v7a"; }
-    public static string use_data_dir(string _data_path) { return ""; }
+    public static string use_data_dir(string _data_path, string _apk_path) { return ""; }
 #endif
 
     public static void reboot_app()

Assets/AndroidIl2cppPatchDemo/Plugins/Android/libs/armeabi-v7a/libbootstrap.so

@@ -23,7 +23,7 @@ public void OnClickSetVersion()
 
         if (updateVersion <= 0)
         {
-            string error = Bootstrap.use_data_dir("");
+            string error = Bootstrap.use_data_dir("", "");
             if (!string.IsNullOrEmpty(error))
             {
                 messageBox.Show("use failed. empty path error:" + error, "ok", ()=> { messageBox.Close(); });
@@ -68,7 +68,16 @@ private IEnumerator PreparePatchAndRestart()
         ZipHelper.UnZip(zipLibil2cppPath, runtimePatchPath, "", true);
 
         //4. tell libboostrap.so to use the right patch after reboot
-        string error = Bootstrap.use_data_dir(runtimePatchPath);
+        //jar:file:///data/app/x.x.x/base.apk!/assets/
+        int apkPathStart = Application.streamingAssetsPath.IndexOf("/data");
+        int apkPathEnd = Application.streamingAssetsPath.IndexOf("!");
+        string apkPath = Application.streamingAssetsPath.Substring(apkPathStart,apkPathEnd - apkPathStart);
+        if (string.IsNullOrEmpty(apkPath))
+        {
+            messageBox.Show("use failed. apk path not found in [" + Application.streamingAssetsPath + "]", "ok", () => { messageBox.Close(); });
+            yield break;
+        }
+        string error = Bootstrap.use_data_dir(runtimePatchPath, apkPath);
         if (!string.IsNullOrEmpty(error))
         {
             messageBox.Show("use failed. path:" + zipLibil2cppPath + ", error:" + error, "ok", () => { messageBox.Close(); });