public class MainActivity extends Activity {
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main)

            final GoodView goodView = new GoodView(this);
            Button button = new Button(this);
            button.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    goodView.setText("+1");
                    goodView.show(v);
                }
            });

        }
    }