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!");
}

Answer 1

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

2. 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.

Answer 2

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.