<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
   package="uni.activity" 
   android:versionCode="1" 
   android:versionName="1.0"> 
  <uses-sdk android:minSdkVersion="7" /> 
  <application android:icon="@drawable/icon" android:label="@string/app_name"> 
    <activity android:name=".ActivityDemoActivity" 
         android:label="@string/app_name"> 
      <intent-filter> 
        <action android:name="android.intent.action.MAIN" /> 
        <category android:name="android.intent.category.LAUNCHER" /> 
      </intent-filter> 
    </activity> 
    <activity android:name=".Activity01" 
         android:label="@string/app_name"> 
    </activity> 
  </application> 
</manifest>

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
  android:orientation="vertical" 
  android:layout_width="fill_parent" 
  android:layout_height="fill_parent" 
  > 
<TextView  
  android:layout_width="fill_parent"  
  android:layout_height="wrap_content"  
  android:text="@string/hello" 
  /> 
 <Button  
  android:id="@+id/Button_A" 
  android:text="GO to activity 2" 
  android:layout_width="fill_parent" 
  android:layout_height="wrap_content" 
  /> 
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
  android:orientation="vertical" 
  android:layout_width="fill_parent" 
  android:layout_height="fill_parent" 
  > 
<TextView  
  android:layout_width="fill_parent"  
  android:layout_height="wrap_content"  
  android:text="@string/hello" 
  /> 
 <Button  
  android:id="@+id/Button_A" 
  android:text="GO to activity 2" 
  android:layout_width="fill_parent" 
  android:layout_height="wrap_content" 
  /> 
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?> 
<resources> 
  <string name="hello">Hello World, ActivityDemoActivity!</string> 
  <string name="app_name">ActivityDemo</string> 
  <string name="activity01">this is activity 01</string> 
</resources>

/* 
 * @author octobershiner 
 * 2011 07 29 
 * SE.HIT 
 * 演示完整的activity的声明周期，以及isFinish方法的调用 
 * 此activity为程序入口activity 
 * */ 
package uni.activity; 
import android.app.Activity; 
import android.content.Intent; 
import android.os.Bundle; 
import android.util.Log; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.widget.Button; 
public class ActivityDemoActivity extends Activity { 
  /** Called when the activity is first created. */ 
  private static final String TAG = "demo"; 
  private Button button_A; 
  @Override 
  public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.main); 
    button_A = (Button)this.findViewById(R.id.Button_A); 
    button_A.setOnClickListener(new myButtonListener()); 
  } 
  private class myButtonListener implements OnClickListener{ 
    @Override 
    public void onClick(View v) { 
      // TODO Auto-generated method stub 
      Intent intent = new Intent(); 
      intent.setClass(ActivityDemoActivity.this, Activity01.class); 
      ActivityDemoActivity.this.startActivity(intent); 
      //感兴趣的朋友可以取消下面的代码注释，来测试finish方法的使用，会发现第一个activity会被强制终止 
      //ActivityDemoActivity.this.finish(); 
    } 
  }; 
  protected void onStart(){ 
    super.onStart(); 
    Log.i(TAG, "The activityDemo state---->onStart"); 
  } 
  protected void onRestart(){ 
    super.onRestart(); 
    Log.i(TAG, "The activityDemo state---->onReatart"); 
  } 
  protected void onResume(){ 
    super.onResume(); 
    Log.i(TAG, "The activityDemo state---->onResume"); 
  } 
  protected void onPause(){ 
    super.onPause(); 
    //调用isFinishing方法，判断activity是否要销毁 
    Log.i(TAG, "The activityDemo state---->onPause"); 
    if(isFinishing()){ 
      Log.w(TAG, "The activityDemo will be destroyed!"); 
    }else{ 
      Log.w(TAG, "The activityDemo is just pausing!"); 
    } 
  } 
  protected void onStop(){ 
    super.onStop(); 
    Log.i(TAG, "The activityDemo state---->onStop"); 
  } 
  protected void onDestroy(){ 
    super.onDestroy(); 
    Log.i(TAG, "The activityDemo state---->onDestroy"); 
  } 
}

/* 
 * @author octobershiner 
 * 2011 07 29 
 * SE.HIT 
 * 演示完整的activity的声明周期，以及isFinish方法的调用 
 * 此activity可由ActivityDemoActivity启动 
 * */ 
package uni.activity; 
import android.app.Activity; 
import android.os.Bundle; 
import android.util.Log; 
public class Activity01 extends Activity{ 
  private static final String TAG = "demo"; 
  @Override 
  protected void onCreate(Bundle savedInstanceState) { 
    // TODO Auto-generated method stub 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity01); 
    Log.d(TAG, "The activity01 state---->onStart"); 
  } 
   protected void onStart(){ 
      super.onStart(); 
      Log.d(TAG, "The activity01 state---->onStart"); 
    } 
    protected void onRestart(){ 
      super.onRestart(); 
      Log.d(TAG, "The activity01 state---->onReatart"); 
    } 
    protected void onResume(){ 
      super.onResume(); 
      Log.d(TAG, "The activity01 state---->onResume"); 
    } 
    protected void onPause(){ 
      super.onPause(); 
      Log.d(TAG, "The activity01 state---->onPause"); 
      //调用isFinishing方法，判断activity是否要销毁 
      if(isFinishing()){ 
        Log.w(TAG, "The activity01 will be destroyed!"); 
      }else{ 
        Log.w(TAG, "The activity01 is just pausing!"); 
      } 
    } 
    protected void onStop(){ 
      super.onStop(); 
      Log.d(TAG, "The activity01 state---->onStop"); 
    } 
    protected void onDestroy(){ 
      super.onDestroy(); 
      Log.d(TAG, "The activity01 state---->onDestroy"); 
    } 
}