Fix python2 for webview

new env var ANDROID_UNPACK to target a folder '/data/data/<app>/files' and for sdl2 that + '/app' to get libpymodules.so

Author: KeyWeeUsr

pythonforandroid/bootstraps/sdl2/build/src/org/kivy/android/PythonActivity.java

@@ -131,12 +131,6 @@ protected void onPostExecute(String result) {
             // private data if we do not.
             mActivity.finishLoad();
 
-            // finishLoad called setContentView with the SDL view, which
-            // removed the loading screen. However, we still need it to
-            // show until the app is ready to render, so pop it back up
-            // on top of the SDL view.
-            mActivity.showLoadingScreen();
-
             String app_root_dir = getAppRoot();
             if (getIntent() != null && getIntent().getAction() != null &&
                     getIntent().getAction().equals("org.kivy.LAUNCH")) {
@@ -172,6 +166,7 @@ protected void onPostExecute(String result) {
             String mFilesDirectory = mActivity.getFilesDir().getAbsolutePath();
             Log.v(TAG, "Setting env vars for start.c and Python to use");
             SDLActivity.nativeSetEnv("ANDROID_PRIVATE", mFilesDirectory);
+            SDLActivity.nativeSetEnv("ANDROID_UNPACK", mFilesDirectory + "/app");
             SDLActivity.nativeSetEnv("PYTHONHOME", app_root_dir);
             SDLActivity.nativeSetEnv("PYTHONPATH", app_root_dir + ":" + app_root_dir + "/lib");
             SDLActivity.nativeSetEnv("PYTHONOPTIMIZE", "2");

pythonforandroid/recipes/python2/patches/custom-loader.patch

@@ -17,8 +17,8 @@
 +
 +    /* Ensure we have access to libpymodules. */
 +    if (libpymodules == -1) {
-+        printf("ANDROID_APP_PATH = %s\n", getenv("ANDROID_APP_PATH"));
-+        PyOS_snprintf(pathbuf, sizeof(pathbuf), "%s/libpymodules.so", getenv("ANDROID_APP_PATH"));
++        printf("ANDROID_UNPACK = %s\n", getenv("ANDROID_UNPACK"));
++        PyOS_snprintf(pathbuf, sizeof(pathbuf), "%s/libpymodules.so", getenv("ANDROID_UNPACK"));
 +        libpymodules = dlopen(pathbuf, RTLD_NOW);
 +
 +        if (libpymodules == NULL) {