利用Android的Log 演示一个activity的生命周期代码

代码： 
//DemoActivity.java  
 
package uni.activity; 
/*
  @author octobershiner
  2011 7 22
  SE.HIT
*/ 
import android.app.Activity; 
import android.os.Bundle; 
import android.util.Log; 
 
public class ActivityDemoActivity extends Activity { 
    /** Called when the activity is first created. */ 
     
    private static final String TAG = "demo"; 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
        super.onCreate(savedInstanceState); 
        setContentView(R.layout.main); 
        Log.d("demo", "this is a test string "); 
    } 
 
    protected void onStart(){ 
        super.onStart(); 
        Log.i(TAG, "The activity state---->onStart"); 
    } 
     
    protected void onRestart(){ 
        super.onRestart(); 
        Log.i(TAG, "The activity state---->onReatart"); 
    } 
 
    protected void onResume(){ 
        super.onResume(); 
        Log.i(TAG, "The activity state---->onResume"); 
    } 
 
    protected void onPause(){ 
        super.onPause(); 
        Log.i(TAG, "The activity state---->onPause"); 
    } 
 
    protected void onStop(){ 
        super.onStop(); 
        Log.i(TAG, "The activity state---->onStop"); 
    } 
 
    protected void onDestroy(){ 
        super.onDestroy(); 
        Log.i(TAG, "The activity state---->onDestroy"); 
    } 
 
     
} 
代码：
//DemoActivity.java

package uni.activity;
/*
  @author octobershiner
  2011 7 22
  SE.HIT
*/
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;

public class ActivityDemoActivity extends Activity {
    /** Called when the activity is first created. */
   
    private static final String TAG = "demo";
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        Log.d("demo", "this is a test string ");
    }

    protected void onStart(){
        super.onStart();
        Log.i(TAG, "The activity state---->onStart&quo