如何在Retrofit中发送GET请求？(报错)

public interface ApiService {
    @GET("endpoint")
    Call<ResponseBody> getData();
}

Retrofit retrofit = new Retrofit.Builder()
        .baseUrl("https://api.example.com/") // 替换为你的API基础URL
        .addConverterFactory(GsonConverterFactory.create())
        .build();

ApiService apiService = retrofit.create(ApiService.class);

Call<ResponseBody> call = apiService.getData();
call.enqueue(new Callback<ResponseBody>() {
    @Override
    public void onResponse(Call<ResponseBody> call, Response<ResponseBody> response) {
        if (response.isSuccessful()) {
            // 处理成功响应
            ResponseBody responseBody = response.body();
            // ...
        } else {
            // 处理错误响应
            // ...
        }
    }

    @Override
    public void onFailure(Call<ResponseBody> call, Throwable t) {
        // 处理请求失败
        // ...
    }
});