How do I convert a successful Response body to a specific type using retrofit?

Question

In async mode retrofit calls

public void success(T t, Response rawResponse)

were t is the converted response, and rawResponse is the raw r

Answer 1

Here's an example of a StringConverter class that implements the Converter found in retrofit. Basically you'll have to override the fromBody() and tell it what you want.

public class StringConverter implements Converter {

    /*
     * In default cases Retrofit calls on GSON which expects a JSON which gives
     * us the following error, com.google.gson.JsonSyntaxException:
     * java.lang.IllegalStateException: Expected BEGIN_OBJECT but was
     * BEGIN_ARRAY at line x column x
     */

    @Override
    public Object fromBody(TypedInput typedInput, Type type)
            throws ConversionException {

        String text = null;
        try {
            text = fromStream(typedInput.in());
        } catch (IOException e) {
            e.printStackTrace();
        }
        return text;
    }

    @Override
    public TypedOutput toBody(Object o) {
        return null;
    }

    // Custom method to convert stream from request to string
    public static String fromStream(InputStream in) throws IOException {
        BufferedReader reader = new BufferedReader(new InputStreamReader(in));
        StringBuilder out = new StringBuilder();
        String newLine = System.getProperty("line.separator");
        String line;
        while ((line = reader.readLine()) != null) {
            out.append(line);
            out.append(newLine);
        }
        return out.toString();
    }
}

Applying this to your request you'll have to do the following:

// initializing Retrofit's rest adapter
RestAdapter restAdapter = new RestAdapter.Builder()
        .setEndpoint(ApiConstants.MAIN_URL).setLogLevel(LogLevel.FULL)
        .setConverter(new StringConverter()).build();