ExcludeFieldsWithoutSerializedName.java

/**
 * Estrategia de exclusion para {@link Gson} para saltarse campos que no sean serializables
 * @author shujito
 */
public class ExcludeFieldsWithoutSerializedName implements ExclusionStrategy
{
    @Override
    public boolean shouldSkipClass(Class<?> clss)
    {
        return false;
    }
    
    @Override
    public boolean shouldSkipField(FieldAttributes fieldAttributes)
    {
        // get all annotations, skip these without @SerializedName
        Collection<Annotation> annotations = fieldAttributes.getAnnotations();
        for (Annotation a : annotations)
        {
            if (a instanceof SerializedName)
            {
                return false;
            }
        }
        return true;
    }
}

SomeApplication.java

public class SomeApplication
{
    /* ... app code ... */
    @Override
    public void onCreate()
    {
        super.onCreate();
        Log.e(TAG, "Force log to cat");
        instance = this;
        Configuration configuration = new Configuration.Builder(this)
            .setDatabaseName(this.getPackageName())
            .setDatabaseVersion(1)
            .create();
        ActiveAndroid.initialize(configuration);
        ExcludeFieldsWithoutSerializedName efwosn = new ExcludeFieldsWithoutSerializedName();
        Ion.getDefault(this)
            .configure()
            .setGson(new GsonBuilder()
                .addDeserializationExclusionStrategy(efwosn)
                .addSerializationExclusionStrategy(efwosn)
                .create());
    }
    /* ... app code ... */
}