Button is not clickable or focusable

Question

I have created a button in my screen\'s XML like this:

Answer 1

you should add a listener to listen the clic event on your button like this :

Button btn = (Button)findViewById(R.id.btn1);

//add the listener to your Button 
btn.addOnClickListener( new OnClickListener(){
    @Override
    public void onClick(View v ){

        Toast.makeText(YourActivity.this, "the button is clicked ...", 3000).show();

    }
});