Finally, we will migrate our classes. We have two automatic options available. We will use both. Locate MigrationActivity.java and open it. Choose the Code | Convert Java file to the Kotlin file. It takes a couple of seconds to convert. Now, drag and drop the file from the Java package into the Kotlin sources package. Observe the following source code:
package com.journaler.activity
import android.os.Bundle
import android.support.v7.app.AppCompatActivity
import com.journaler.R
class MigrationActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
}
override fun onResume() {
super.onResume()
}
} As we have mentioned, fully automatic conversion doesn't give the perfect code. In the next section, we will do a refactoring and clean up. The second way to do the same thing is by...