Android, Properties, data to file simple src

public static void saveProperty(String key, String value){
    Properties properties = new Properties();

    String file = ...

    try {

        if(new File(file).exists()){
            properties.load(new FileInputStream(file));
        }
        properties.put(key, value);
        properties.store(new FileOutputStream(file), null);
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
}

public static String loadProperty(String key){

    Properties properties = new Properties();

    String file = ...

    try {
        properties.load(new FileInputStream(file));
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }

    return (String)properties.get(key);
}