complete project example

[wsflook]

hello my friend how to add a complete example of this library? Because the tutorial on how to use, I could not use, is giving error in this part:

Add new RNPinchZoomLayoutPackage () to the list returned by the getPackages () method

and here on github, it does not show the file => MainActivity.java

And thank you so much for sharing this beautiful work and getting to know us.

error:
Error: Command failed: ./gradlew app:installDebug -PreactNativeDevServerPort=8081
/home/hjrdev/dev/react-native/look-project/look-maker/android/app/src/main/java/com/rnimagecroppicker/MainActivity.java:3: error: cannot find symbol
import info.moonjava.RNPinchZoomLayoutPackage;
^
symbol: class RNPinchZoomLayoutPackage
location: package info.moonjava
/home/hjrdev/dev/react-native/look-project/look-maker/android/app/src/main/java/com/rnimagecroppicker/MainActivity.java:17: error: method does not override or implement a method from a supertype
@OverRide
^
/home/hjrdev/dev/react-native/look-project/look-maker/android/app/src/main/java/com/rnimagecroppicker/MainActivity.java:19: error: cannot find symbol
return new RNPinchZoomLayoutPackage();
^
symbol: class RNPinchZoomLayoutPackage
location: class MainActivity
3 errors