Error in setOnClickListener

Question

I am new to android and i am trying to change the text by clicking button but i am getting the error "can not resolve setOnClickListener" on third line.how can i resolve this?

  Button b=(Button)findViewById(R.id.button);
        b.setOnClickListener(
                new Button.setOnClickListener(){   //error in this line
                    public void onclick(View v){
                        TextView t=(TextView)findViewById(R.id.textView2);
                        t.setText("text changed!");
                    }
                }
        );

Possible duplicate of [Button OnClickListener not working](http://stackoverflow.com/questions/17335135/button-onclicklistener-not-working) — Vucko, May 26 '16 at 16:16

Deepak Goyal · Accepted Answer · 2016-05-26T16:10:53.570

4

You have to use View

Button b=(Button)findViewById(R.id.button);
b.setOnClickListener(View.OnClickListener() {
   @Override
   public void onClick(View v) {
      TextView t=(TextView)findViewById(R.id.textView2);
      t.setText("text changed!");
  }
});

edited May 26 '16 at 16:10

answered May 26 '16 at 16:07

Deepak Goyal

4,747
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I think you answered before me, didnt see. +1 . – Yasin Kaçmaz May 26 '16 at 17:29

score 2 · Answer 2 · answered May 26 '16 at 16:14

Can you try like :

TextView t;
Button b;
@Override
protected void onCreate(Bundle savedInstanceState) {
   super.onCreate(savedInstanceState);
   setContentView(R.layout.yourlayout);
   t=(TextView)findViewById(R.id.textView2);
   b=(Button)findViewById(R.id.button);
   b.setOnClickListener(View.OnClickListener() {
        @Override
        public void onClick(View v) {
        t.setText("text changed!");
        }
   });
}

Also can you post your Xml too, for reference

Pablo · Answer 3 · 2016-05-26T17:40:46.960

When you want to ser a click listener in a Button, you should use setOnClickListener like you did but the argument must be an instance of Button.OnClickListener(), so you have to use new to create that instance. Beacuase Button.OnClickListener is an interface, you also have to implement public void onClick(View v) like you did.

Please, try this:

Button b=(Button)findViewById(R.id.button);
b.setOnClickListener(new Button.OnClickListener() {
    @Override
    public void onClick(View v) {
        TextView t=(TextView)findViewById(R.id.textView2);
        t.setText("text changed!");
    }
});

Error in setOnClickListener

3 Answers3