안드로이드 헬로월드

src- helloactivity

public class HelloActivity extends ActionBarActivity {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_hello);
	}

gen- r.java

layout{
public static final int activity_hello=0x7f030018;
}

res-layout- 프로젝트명.xml