60.7 Extracting Intent Data

Now that ActivityB is being launched from MainActivity, the next step is to extract the String data value included in the intent and assign it to the TextView object in the ActivityB user interface. This involves adding some code to the onCreate() method of ActivityB in the ActivityB.kt source file:

package com.ebookfrenzy.explicitintent

 

import androidx.appcompat.app.AppCompatActivity

import android.os.Bundle

import android.view.View

import android.content.Intent

 

import kotlinx.android.synthetic.main.activity_b.*

 

class ActivityB : AppCompatActivity() {

 

    override fun onCreate(savedInstanceState: Bundle?) {

        super.onCreate(savedInstanceState)

        setContentView(R.layout.activity_b)

        val extras = intent.extras ?: return

 ...