搭建Android手机开发环境

package jonse.Package;

import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;

public class HelloAndriodActivity extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//setContentView(R.layout.main);

TextView tv=new TextView(this);

tv.setText("hello world,Andriod!");

setContentView(tv);
}
}