Change TextView in another Activity

Question

I would like to click an image button and have it open a new activity and change the text view of that activity. Here's what I have so far, to open the new activity:

val bad = findViewById<ImageButton>(R.id.bad)
        bad.setOnClickListener {
            val intent = Intent(this, HomeActivity::class.java)
            startActivity(intent)
        }

but I don't know where to add the info for changing the TextView text onclick. I tried it this way and it worked, but the textview is in the same XML.

fun onClick(view: View) {
        val text = findViewById<TextView>(R.id.textView) as TextView
        text.text = "Button clicked"

    }

Yes I've done extensive research on this, and even read similar posts on here. But I'm still lost. I would like a definitive answer for my specific question... so yea. Thank you in advance for your help!

Does this answer your question? [How do I pass data between Activities in Android application?](https://stackoverflow.com/questions/2091465/how-do-i-pass-data-between-activities-in-android-application) — Ryan M, Aug 16 '20 at 07:22

cactustictacs · Accepted Answer · 2020-08-16T23:51:09.820

0

There's an answer here about passing data between activities

You basically want to add a String extra to your Intent, and then grab it in the new Activity and set your TextView to use that value. onCreate is a good place to do it

val bad = findViewById<ImageButton>(R.id.bad)
        bad.setOnClickListener {
            val intent = Intent(this, HomeActivity::class.java)
            // put the data in
            intent.putExtra("MY_TEXT", "whatever text you want in the TextView")
            startActivity(intent)
        }

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    val textView = findViewById<TextView>(R.id.textView) as TextView
    // get the data out
    val newText = intent.getStringExtra("MY_TEXT")
    // do whatever (if you didn't add the extra newText will be null)
    textView.text = newText
}

edited Aug 16 '20 at 23:51

answered Aug 16 '20 at 00:30

cactustictacs

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How would I set my TextView to use that value? – RamenNoodles Aug 16 '20 at 01:21
same as in your ``onClick`` code up there, you just do ``intent.getStringExtra(KEY_USED_WHEN_ADDING)``. Just do it in ``onCreate`` or something, that's usually where you do all your ``findViewById`` stuff and setting up UI bits – cactustictacs Aug 16 '20 at 01:30
Can you give me an example? In Kotlin, preferable. Most if not all the examples I've found are in Java. – RamenNoodles Aug 16 '20 at 02:27
there you go if it's any clearer! – cactustictacs Aug 16 '20 at 23:51
That's perfect!! Thanks! :) – RamenNoodles Aug 17 '20 at 23:35

Change TextView in another Activity

1 Answers1