如何处理Retrofit 2.0中的错误

Question

我想在Retrofit 2.0中处理错误

得到eg code=404和body=null,但errorBody()包含ErrorModel(Boolean status和String info)中的数据.

这是errorBody().content:[text=\n{"status":false,"info":"Provided email doesn't exist."}].

我怎样才能获得这些数据？

谢谢你的帮助!

这是我的Retrofit请求代码:

ResetPasswordApi.Factory.getInstance().resetPassword(loginEditText.getText().toString())
    .enqueue(new Callback<StatusInfoModel>() {
        @Override
        public void onResponse(Call<StatusInfoModel> call, Response<StatusInfoModel> response) {
            if (response.isSuccessful()) {
                showToast(getApplicationContext(), getString(R.string.new_password_sent));
            } else {
                showToast(getApplicationContext(), getString(R.string.email_not_exist));
            }
        }

        @Override
        public void onFailure(Call<StatusInfoModel> call, Throwable t) {
            showToast(getApplicationContext(), "Something went wrong...");
        }
    });

Answer 1

如果您想在出现错误响应时获取数据(通常是除200之外的响应代码),您可以在onResponse()方法中执行此操作:

if (response.code() == 404) {
    Gson gson = new GsonBuilder().create();
    YourErrorPojo pojo = new YourErrorPojo();
    try {
         pojo = gson.fromJson(response.errorBody().string(), YourErrorPojo.class);
         Toast.makeText(getApplicationContext(), pojo.getInfo(), Toast.LENGTH_LONG).show();
    } catch (IOException e) { }
}

生成时YourErrorPojo.class执行以下步骤:

1. 去Json Schema 2 Pojo

2. 粘贴您的示例Json,然后选择源类型Json,注释Gson

3. 你的例子Json是:{"status":false,"info":"Provided email doesn't exist."}

4. 单击预览,它将Pojo为您生成您的课程.

将此添加到您的build.gradle:compile 'com.google.code.gson:gson:2.7'

我Gson在这个解决方案中使用过,但你可以得到你的Json喜欢:response.errorBody().string()处理它,做任何你想做的事情.

Answer 2

Retrofit doesn't see 404 as a failure, so it will enter the onSuccess.

response.isSuccessful() is true if the response code is in the range of 200-300, so it will enter the else there.

if (response.isSuccessful()) {
    showToast(getApplicationContext(), getString(R.string.new_password_sent));
} else {
    // A 404 will go here

    showToast(getApplicationContext(), getString(R.string.email_not_exist));
}

However since your response was not successful, you do not get the response body with .body(), but with errorBody(), errorBody will filled when the request was a success, but response.isSuccessful() returns false (so in case of a status code that is not 200-300).