vpaliy

public abstract class AuthFragment extends Fragment {

  protected Callback callback;

  @Nullable
  @Override
  public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
    View root = inflater.inflate(authLayout(), container, false);
    ButterKnife.bind(this, root);
    return root;

vpaliy

//load a very big image and resize it, so it fits our needs
Glide.with(this)
 .load(R.drawable.busy)
 .asBitmap()
 .override(screenSize[0]*2,screenSize[1])
 .diskCacheStrategy(DiskCacheStrategy.RESULT)
 .into(new ImageViewTarget<Bitmap>(background) {
   @Override
   protected void setResource(Bitmap resource) {
      background.setImageBitmap(resource);

vpaliy

sharedElements.forEach(element -> {
  @ColorRes int color = element.getId() != R.id.logo ? R.color.white_transparent : R.color.color_logo_log_in;
  DrawableCompat.setTint(element.getDrawable(), ContextCompat.getColor(this, color));
});

vpaliy

public class AuthActivity extends AppCompatActivity {

  @BindViews(value = {R.id.logo, R.id.first, R.id.second, R.id.last})
  protected List<ImageView> sharedElements;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_login);
    ButterKnife.bind(this);

vpaliy

public class AnimatedViewPager extends ViewPager {

    private int duration;

    public AnimatedViewPager(Context context) {
        super(context);
        postInitViewPager();
    }

    public AnimatedViewPager(Context context, AttributeSet attrs) {

vpaliy

 @Override
 public boolean onTouchEvent(MotionEvent ev) {
    return false;
  }

vpaliy

<android.support.constraint.ConstraintLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/root"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.vpaliy.loginconcept.LoginActivity">

    <ImageView

vpaliy

<resources>
  <!-- Base application theme. -->
    <style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
        <item name="windowActionBar">false</item>
        <item name="windowNoTitle">true</item>
        <item name="android:windowFullscreen">true</item>
        <item name="colorPrimary">@color/colorPrimary</item>
        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
        <item name="colorAccent">@color/colorAccent</item>
        <item name="colorControlActivated">@color/color_input_hint</item>

vpaliy

public static class Adapter extends FragmentStatePagerAdapter{
  //our factor value
  private float factor;
  
  public Adapter(FragmentManager manager, final ViewPager pager){
    super(manager);
    final float textSize = pager.getResources().getDimension(R.dimen.folded_size);
    final float textPadding = pager.getResources().getDimension(R.dimen.folded_label_padding);
    factor = 1 - (textSize + textPadding) / (pager.getWidth());
  }

vpaliy

public abstract class AuthFragment extends Fragment {

    protected Callback callback;

    @BindView(R.id.caption)
    protected VerticalTextView caption;

    @BindView(R.id.root)
    protected ViewGroup parent;