第一个android程序HelloAndroid

创建工程

结构：

代码：

 1 package hello.aaronwxb.cn;
 2 
 3 import android.app.Activity;
 4 import android.os.Bundle;
 5 import android.util.Log;
 6 import android.widget.TextView;
 7 
 8 //private static final String TAG = "HelloAndroid";
 9 
10 public class HelloAndroidActivity extends Activity {
11     /** Called when the activity is first created. */
12     @Override
13     public void onCreate(Bundle savedInstanceState) {
14         super.onCreate(savedInstanceState);
15         TextView tv = new TextView(this);
16         tv.setText("This is a HELLOWORLD 例子");
17         setContentView(tv);
18         // setContentView(R.layout.main);
19     }
20 }

结果显示：