Android : android - read arabic from local json file

please someone help me , i try read arabic string from json file

the code i use it , i try read multi-lines of arabic language

public String loadJSONFromAsset() {
        String json = null;
        try {

            InputStream is = getAssets().open("horo_scop.txt");
            int size = is.available();
            byte[] buffer = new byte[size];
            is.read(buffer);
            is.close();
            json = new String(buffer, "UTF_8");

            System.out.println("horo json file " + json);

        } catch (IOException ex) {
            ex.printStackTrace();
            return null;
        }
        return json;

    }

it print arabic like that "????? ???"

how can i fix it