MyApp.java

public class MyApp extends Application {

    private static Context context;
    private static ObjectGraph objectGraph;

    @Override
    public void onCreate() {
        super.onCreate();

        context = this;

        buildObjectGraphAndInject();
    }

    public void buildObjectGraphAndInject() {
        objectGraph = ObjectGraph.create(Modules.list(this));
        objectGraph.inject(this);
    }

    public static void injectStatic(Object o) {
        objectGraph.inject(o);
    }

    public void inject(Object o) {
        objectGraph.inject(o);
    }

    public static MyApp get() {
        return (MyApp) context.getApplicationContext();
    }
}