Import in your gradle root file
classpath 'com.neenbedankt.gradle.plugins:android-apt:1.8'Import in your gradle app file
apt 'com.google.auto.value:auto-value:1.2'
apt 'com.ryanharter.auto.value:auto-value-gson:0.3.1'
provided 'com.jakewharton.auto.value:auto-value-annotations:1.2-update1'
provided 'org.glassfish:javax.annotation:10.0-b28'Create object with autovalue:
@AutoValue public abstract class SignIn {
@SerializedName("signin_token") public abstract String signinToken();
public abstract String username();
public static TypeAdapter<SignIn> typeAdapter(Gson gson) {
return new AutoValue_SignIn.GsonTypeAdapter(gson);
}
public static SignIn create(String signin, String username) {
return new AutoValue_SignIn(signin, username);
}
}Create your Gson converter with your GsonBuilder
Gson gson = new GsonBuilder()
.registerTypeAdapterFactory(
new AutoValueGsonTypeAdapterFactory())
.create());Deserialize
String myJsonData = "{
\"signin_token\": \"mySigninToken\",
\"username\": \"myUsername\" }";
SignIn signInData = gson.fromJson(myJsonData, Signin.class);Serialize
Signin myData = SignIn.create("myTokenData", "myUsername");
String myJsonData = gson.toJson(myData);Using Gson is a great way to simplify Serialization and Deserialization code by using POJO objects. The side effect is that reflection is costly performance wise. That’s why using AutoValue-Gson to generate CustomTypeAdapter will avoid this reflection cost while staying very simple to update when an api change is happening.