Android Studio Button not Responding (OnClick)

I have tried various tutorials and no matter what , the button just never responds.

Here is the Code:

public class MainActivity extends Activity {

Button handbtn;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    this.requestWindowFeature(Window.FEATURE_NO_TITLE);
    setContentView(R.layout.activity_main);

    handbtn = (Button) findViewById(R.id.btnHandSigns);

    handbtn.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Intent loadsigns = new Intent(MainActivity.this, hand_signs.class);
            startActivity(loadsigns);
        }
    });

}