FormActivity.kt

class FormActivity: AppCompatActivity {
    
    onCreate(...){...}

    fun sendFormAndGoBack(name: String) {
        // if you want to send any type of data back, such as an object, string, int etc
        // you have to create an intent and use this bit of code
        // otherwise you can just use setResult(Activity.RESULT_OK) and finish()
        
        val resultIntent = Intent()
        resultIntent.putExtra(INPUT_NAME, name)
        
        setResult(Activity.RESULT_OK, resultIntent)
        finish()
    }
    
    companion object {
        @JvmField
        val INPUT_NAME = "com.example.app.INPUT_NAME" //this is basically a static field in java that can be accessed from other classes
    }

}