b00sti

@BindingAdapter({"bind:imageUrl", "bind:error"})
public static void loadImage(ImageView view, String url, Drawable error) {
   Picasso.with(view.getContext()).load(url).error(error).into(view);
}

private class Todo {
   public final ObservableField<String> image = new ObservableField<>();
   public final ObservableField<String> date = new ObservableField<>();
   public final ObservableInt priority = new ObservableInt();
}

b00sti

<layout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools">

    <data>

        <variable
            name="todo"
            type="com.b00sti.models.Todo" />
    </data>

b00sti

    public static Observable<User> getFromApi(String username) {
        Retrofit retrofit = new Retrofit.Builder()
                .addCallAdapterFactory(RxJava2CallAdapterFactory.createWithScheduler(Schedulers.io()))
                .addConverterFactory(GsonConverterFactory.create())
                .baseUrl(ENDPOINT)
                .build();

        UserService apiService = retrofit.create(UserService.class);
        return apiService.getUser(username);
    }

b00sti

UserService apiService = retrofit.create(UserService.class);
    
String username = "b00sti";
Call<User> call = apiService.getUser(username);
call.enqueue(new Callback<User>() {
    @Override
    public void onResponse(Call<User> call, Response<User> response) {
        int statusCode = response.code();
        User user = response.body();  

b00sti

public static final String ENDPOINT = "http://api.b00sti.com/";
Retrofit retrofit = new Retrofit.Builder()
    .baseUrl(ENDPOINT)
    .addConverterFactory(GsonConverterFactory.create())
    .build();

b00sti

public interface UserService {

    @GET("users/{username}")
    Call<User> getUser(@Path("username") String username);

    @GET("group/{id}/users")
    Call<List<User>> groupList(@Path("id") int groupId, @Query("sort") String sort);

    @POST("users/new")
    Call<User> createUser(@Body User user);

b00sti

@EActivity(R.layout.translate) // Sets content view to R.layout.translate
public class TranslateActivity extends Activity {

    @ViewById // Injects R.id.textInput
    EditText textInput;

    @ViewById(R.id.myTextView) // Injects R.id.myTextView
    TextView result;

    @AnimationRes // Injects android.R.anim.fade_in

b00sti

<resources>

    <color name="red_50">#FFEBEE</color>
    <color name="red_100">#FFCDD2</color>
    <color name="red_200">#EF9A9A</color>
    <color name="red_300">#E57373</color>
    <color name="red_400">#EF5350</color>
    <color name="red_500">#F44336</color>
    <color name="red_600">#E53935</color>
    <color name="red_700">#D32F2F</color>

b00sti

public class NonNullExapmle {
    private String placeName;

    public NonNullExapmle(Place place) {
        if (place != null) {
            throw new NullPointerException("place");
        }
        this.placeName = place.getName();
    }
}

b00sti

public class NonNullExapmle {
    private String placeName;
    
    public NonNullExapmle(@NonNull Place place) {
        this.placeName = place.getName();
    }
}