Changing TextView text on button click (Android)

Question

I am trying to change text of a textview on a button click. Below is the gist of my code but it doesnt seem to work. Am i doing something wrong. Thanks in Advance

//xml
<TextView android:id="@+id/textView2" android:text="blah blah blah"></TextView>
<Button android:text="Wrong answer." android:onClick="wrongAns" android:clickable="true"></Button>

//code
TextView theCorrectAnsTextView = (TextView)findViewById(R.id.textView2);

public void wrongAns(View v) 
{   
  theCorrectAnsTextView.setText("TextView text has changed!");
}

From where is `wrongAns(View v)` function called? Please provide more details. — Shafi, Sep 17 '11 at 11:37
add log. hope its helpfull i tried my best to format it so its readable. — drdrdr, Sep 17 '11 at 11:51
also note that im not using an onClickListener. The button just triggers the fuction. Could this be the problem — drdrdr, Sep 17 '11 at 11:53
Possible duplicate of [How to change a TextView's text by pressing a Button](http://stackoverflow.com/questions/6716748/how-to-change-a-textviews-text-by-pressing-a-button) — Ciro Santilli OurBigBook.com, Feb 03 '16 at 14:41

score 23 · Accepted Answer · answered Sep 17 '11 at 11:39

23

First you give onclick event for Button like (buttonClick).

In java file just write below code.

public void buttonClick(View v)
{
TextView tv = (TextView)findViewById(R.id.textView1);
tv.setText("Welcome to android");
}

Hope this will help you.

answered Sep 17 '11 at 11:39

Pattabi Raman

5,814
10
39
60

score 1 · Answer 2 · answered Sep 17 '11 at 11:38

Maybe you need to initialize the button. And if it doesn't work, just do it in java code :

Button btn = (Button) findViewById(YourId);
btn.setonClickListener(listener);

public onClickListener listener = new View.OnclickListener{
      onclick(View v){
      // do your thing
      }
}

Something like that, i don't remember without eclipse to correct me.

score 0 · Answer 3 · answered May 19 '17 at 12:44

0

In a simple view with the background a textbox and a button you need to use

public void OnMyButtonClick (View v)
{
    TextView tv = (TextView) v.getRootView().findViewById(R.id.textVal);
    if (tv != null)
      {tv.setText("Hallo");}
}

answered May 19 '17 at 12:44

bttcld

67
7

Rod18 · Answer 4 · 2018-01-28T18:27:06.523

0

Use setContentView, please check What is setContentView(R.layout.main)?

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    mStatusTextView = (TextView) this.findViewById(R.id.status_text_view);
}

edited Jan 28 '18 at 18:27

answered Jan 27 '18 at 01:12

Rod18

1
1

Please edit your answer and add some explanation because code-only answers are discouraged and may, sometimes, be deleted. – WebDevBooster Jan 27 '18 at 01:16

score 0 · Answer 5 · answered Dec 20 '20 at 13:51

In Kotlin To add an OnClickListener to a Button to change the Text(value) of a TextView You have to write the following code in the onCreate method of MainActivity

    var textView = findViewById<TextView>(R.id.text)        
    var button = findViewById<Button>(R.id.button)
    button.setOnClickListener(View.OnClickListener {
        textView.setText("Imran Khan")
    })

Changing TextView text on button click (Android)

5 Answers5