UberUX-Kotlin

Project that demonstrates the entire animation stack present in the Uber app (android) using Kotlin language.

Demo

Libraries

1. FabProgressCircle
2. Retrofit
3. RxAndroid
4. KotlinKtx

Concepts

Transitions - For sharing elements between activities

fun startTransition() {

        val intent = Intent(this, LoginPhoneActivity::class.java)
         val options = ActivityOptionsCompat.makeSceneTransitionAnimation(this,
                   Pair(mBinding.ivback, getString(R.string.transition_arrow)),
                   Pair(mBinding.ivFlag, getString(R.string.transition_ivFlag)),
                   Pair(mBinding.tvCode, getString(R.string.transition_tvCode)),
                   Pair(mBinding.tvPhoneNo, getString(R.string.transition_tvPhoneNo)),
                   Pair(mBinding.llphone, getString(R.string.transition_llPhone))
               )
          startActivity(intent, options.toBundle())


   }

ViewPagerTransformer - For performing animations when ViewPager is swiped

private val pageTransformer: ViewPager.PageTransformer =
        ViewPager.PageTransformer { page, position ->
            if (position < -1) { // [-Infinity,-1)
            
            } else if (position <= 1) { // [-1,1]
                // animate here
            }
        }

Overlays - For creating overlays on map

 private fun addOverlay(place: LatLng) {
 
         val groundOverlay = mMap?.addGroundOverlay(
             GroundOverlayOptions()
                 .position(place, 100f)
                 .transparency(0.5f)
                 .zIndex(3f)
                 .image(BitmapDescriptorFactory.fromBitmap(drawableToBitmap(getDrawable(R.drawable.map_overlay))))
         )
 
         startOverlayAnimation(groundOverlay)
     }

ValueAnimator - For animating overlays and polylines

val tAnimator = ValueAnimator.ofFloat(0F, 1F).apply {
           repeatCount = ValueAnimator.INFINITE
           repeatMode = ValueAnimator.RESTART
           interpolator = LinearInterpolator()
           addUpdateListener { valueAnimator ->
               // animate in here
           }
       }

PolyLines - For drawing lines on map

 with(PolylineOptions()) {
             width(10f)
             color(Color.GRAY)
             startCap(SquareCap())
             endCap(SquareCap())
             jointType(ROUND)
             greyPolyLine = mMap?.addPolyline(this)
         }

How to use this project

Add your GoogleMaps and GooglePlaces key to google_maps_api.xml and turn on direction api from developer console -> You are good to go !