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");
}
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");
}
}
演示sundy留的小作业 截取LOG
这是演示的结果
//利用LOG展示activity的生命周期
//注释表示 中间执行的操作 为方便的观察数据，可以在LOGCAT窗口（没有的话可以在window菜单中的show view中调出）的右侧单击加号创建一个过滤器，我的例子中过滤的是demo
//开始运行demo
07-22 11:18:19.311: INFO/demo(281): The activity state---->onStart
07-22 11:18:19.311: INFO/demo(281): The activity state---->onResume
//按下了back键 返回 activity从stack中弹出
07-22 11:18:34.821: INFO/demo(281): The activity state---->onPause
07-22 11:18:35.090: INFO/demo(281): The activity state---->onStop
07-22 11:18:35.090: INFO/demo(281): The activity state---->onDestroy
//再次启动demo
07-22 11:18:45.550: INFO/demo(281): The activity state---->onStart
07-22 11:18:45.550: INFO/demo(281): The activity state---->onResume
//按下了HOME键 当前TASK 处于后台转态，系统保存状态
07-22 11:18:53.750: INFO/demo(281): The activity state---->onPause
07-22 11:18:54.820: INFO/demo(281): The activity state---->onStop
//再次启动demo 回复原来的TASK activity在栈顶
07-22 11:19:03.550: INFO/demo(281): The activity state---->onReatart
07-22 11:19:03.550: INFO/demo(281): The activity state---->onStart
07-22 11:19:03.550: INFO/demo(281): The activity state---->onResume
