As we said, we need to make a decision whether we will completely rewrite our modules into Kotlin or continue writing our code in Kotlin but keep its legacy in pure Java. What will we do? In this chapter, we will demonstrate a little bit of each.
Our current project, at this point, doesn't have anything to migrate. So, we will create some code. If you don't have the Java sources directory with the packages structure, create it. Now, add the following packages:
- activity
- model
These packages are equivalent to the packages we already have in our Kotlin source code. In the activity package, add the following classes:
- The MigrationActivity.java code is as follows:
package com.journaler.activity;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity...
