反射

获取类：

public static <T>T getT(Object o,int i){
    ParameterizedType parameterizedType = (ParameterizedType) o.getClass().getGenericSuperclass();
    Type type = parameterizedType.getActualTypeArguments()[i];
    Class<T> t = (Class<T>) type;
    try {
        T t1 = t.newInstance();
        return  t1;
    } catch (IllegalAccessException e) {
        e.printStackTrace();
    } catch (InstantiationException e) {
        e.printStackTrace();
    }
    return null;
}

获取接口：

try {
    String data = responseBody.string();
    Type[] types = netCallBack.getClass().getGenericInterfaces();
    Type[] ty = ((ParameterizedType) types[0]).getActualTypeArguments();
    Type t = ty[0];
    Gson gson = new Gson();
    T gson_FT = null;
    gson_FT = gson.fromJson(data, t);
    netCallBack.onSuccess(gson_FT);
} catch (IOException e) {
    e.printStackTrace();
}