21. Init Qt resource

public class QtEnvironment {
    public static int Init(Activity activity) {
        String rootPath = android.os.Environment.getExternalStorageDirectory().getAbsolutePath();
        String apkPath = activity.getApplicationInfo().publicSourceDir;

        String nativeLibraryPrefix = activity.getApplicationInfo().nativeLibraryDir + "/";

        DexClassLoader classLoader = new DexClassLoader("", // .jar/.apk files
                activity.getDir("outdex", Context.MODE_PRIVATE).getAbsolutePath(), // directory where optimized DEX files should be written.
                null, // libs folder (if exists)
                activity.getClassLoader());

        QtNative.setClassLoader(classLoader);

        String[] qtLibs = {"Qt5Core","Qt5Gui","Qt5Widgets","qtforandroid"};
        ArrayList<String> libraryList = new ArrayList<String>();

        String libPrefix = nativeLibraryPrefix + "lib";
        for (int i = 0; i < qtLibs.length; i++)
            libraryList.add(libPrefix + qtLibs[i] + ".so");
        QtNative.loadQtLibraries(libraryList);

        return 1;
    }

}