@Override
            public void onItemSelected(AdapterView<?> adapterView, View view, int pos, long l) {
                populateParametersUI(adapterView.getItemAtPosition(pos).toString(),
                        paramatersParent);
            }
This activity allows the user to visualize the timing curves for
most of the standard Interpolator objects. It allows parameterized
interpolators to be changed, including manipulating the control
points of PathInterpolator to create custom curves.
AnimationsInterpolatorPlayground/app/src/main/java/com/example/android/interpolatorplayground/MainActivity.java