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    /*
     * Standard way
     */
//    MarvelAndroid.getInstance().getCharacters(queryParams,
//        new ResponseCallback<com.n8.marveldroid.EntityModelObjects.Character>() {
//          @Override
//          public void onRequestComplete(List<Character> responseEntities, Throwable error) {
//            if (error != null) {
//              mResultTextView.setText(error.getLocalizedMessage());
//              return;

n8ebel

This code demonstrates 2 approaches to completing the same task, and performs the following actions:

1. The task is to hit the Marvel rest endpoint, and return a list of characters.
2. Take the 4th character in that list, fetch its comics, and then load the image for that comic.
3. Once those requests are done, the image and list of character names are bound to the ui.

    /*
     * Standard way
     */

n8ebel

Simple illustration of responding to text changed events on an EditText.

/*
 *  RxJava
 */
RxTextView.textChangeEvents(mEditText)
    .subscribe(event -> mResultTextView.setText(event.text()));

/*

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val binding = DataBindingUtil.setContentView<ActivityMainBinding>(this, R.layout.activity_main).apply {
  message = "hello"
  number = 5
}

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inline fun <T : ViewDataBinding> T.bindData(block: T.() -> Unit): T { block(); return this }

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class MainActivity : AppCompatActivity(), ViewModelListener {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        val binding = DataBindingUtil.setContentView<ActivityMainBinding>(this, R.layout.activity_main).bindData {
            viewModel = MainViewModel("hello", 5, this@MainActivity)
        }
    }

n8ebel

// I would typically place this adapter in main/_BindingAdapters.kt
// The gist tool won't allow that filename structure
//
@BindingAdapter("mainSubtitleText")
fun setText(view: TextView, value:Int) {
    view.text = view.context.getString(R.string.main_subtitle_format, value)
}

@BindingAdapter("textColor")
fun setTextColor(view: TextView, @ColorRes resId: Int) = view.setTextColor(ContextCompat.getColor(view.context, resId))

n8ebel

@BindingAdapter("imageUrl")
fun setProgress(view: ImageView, url: String) {
    Glide.with(view.context)
            .load(url)
            .error(R.drawable.ic_broken_image_black)
            .listener(object : RequestListener<String, GlideDrawable> {
                override fun onException(e: Exception?, model: String?, target: Target<GlideDrawable>?, isFirstResource: Boolean): Boolean {
                    // use this to ensure placeholder icon doesn't stretch to fill too much space
                    view.scaleType = ImageView.ScaleType.CENTER_INSIDE
                    return false

n8ebel

@BindingAdapter("isHeaderVisible")
fun setHeaderVisibility(view: View, isVisible: Boolean) {
    if (view.visibility == View.VISIBLE) {
        if (isVisible) {
            return
        }

        view.animate()
                .alpha(0f)
                .translationY(-1f * view.height)

n8ebel

/**
 * Provides a [ViewDataBinding] object of the declared type by
 * calling [DataBindingUtil.setContentView] with the property owning [Activity] and the specified
 * layout resource id
 */
class ActivityBindingProvider<out T : ViewDataBinding>(
        @LayoutRes private val layoutRes: Int) : ReadOnlyProperty<Activity, T> {

    private var binding : T? = null