How to Achieve Precise JSON Logging with Retrofit 2?

Precise JSON Logging with Retrofit 2

When sending API requests, obtaining the precise JSON data included in the request can be crucial for debugging and analysis. Retrofit 2 offers a streamlined way to achieve this through its HttpLoggingInterceptor.

Configuring HttpLoggingInterceptor

To use HttpLoggingInterceptor, add the following dependency to your build.gradle:

implementation 'com.squareup.okhttp3:logging-interceptor:4.11.0'

Subsequently, create a Retrofit object as shown:

HttpLoggingInterceptor interceptor = new HttpLoggingInterceptor();
interceptor.setLevel(HttpLoggingInterceptor.Level.BODY);
OkHttpClient client = new OkHttpClient.Builder().addInterceptor(interceptor).build();

Retrofit retrofit = new Retrofit.Builder()
        .baseUrl("https://backend.example.com")
        .client(client)
        .addConverterFactory(GsonConverterFactory.create())
        .build();
        
return retrofit.create(ApiClient.class);

The above configuration will provide detailed logcat messages similar to those generated by the deprecated setLogLevel(RestAdapter.LogLevel.FULL) in Retrofit 1.

Addressing Class Not Found Exceptions

If you encounter java.lang.ClassNotFoundException, it's likely that an older version of Retrofit requires an older logging-interceptor version. Refer to the logging-interceptor GitHub comments for specifics on compatibility.

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