android学习笔记09（activity的生命周期）

Activity04.java文件：

package tk.myactivity04;

import android.os.Bundle; 
import android.app.Activity; 
import android.content.Intent; 
import android.view.Menu; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.widget.Button;

public class Activity04 extends Activity {

    private Button myButton=null; 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
        super.onCreate(savedInstanceState); 
        setContentView(R.layout.activity04); 
        myButton=(Button)findViewById(R.id.myButton); 
        myButton.setText(R.string.myButton); 
        System.out.println("first-->oncreat"); 
        myButton.setOnClickListener(new myButtonListrner()); 
        
    } 
    class myButtonListrner implements OnClickListener{

        @Override 
        public void onClick(View v) {

              Intent intent= new Intent();

              intent.setClass(Activity04.this , secondActivity.class); 
              
              Activity04.this.startActivity(intent); 
       }



}

    @Override 
    protected void onDestroy() { 
        System.out.println("first-->ondestory"); 
        super.onDestroy(); 
    }

    @Override 
    protected void onPause() { 
        System.out.println("first-->onpause"); 
        super.onPause(); 
    }

    @Override 
    protected void onResume() { 
        System.out.println("first-->onresume"); 
        super.onResume(); 
    }

    @Override 
    protected void onStart() { 
        System.out.println("first-->onstart"); 
        super.onStart(); 
    }

    @Override 
    protected void onStop() { 
        System.out.println("first-->onstop"); 
        super.onStop(); 
    }

    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
        getMenuInflater().inflate(R.menu.activity04, menu); 
        return true; 
    } 
}

secondActivity.java文件：

package tk.myactivity04;

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

public class secondActivity extends Activity{

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
        // TODO Auto-generated method stub 
        super.onCreate(savedInstanceState); 
        setContentView(R.layout.second); 
        System.out.println("second-->oncreat"); 
    } 
    @Override 
    protected void onDestroy() { 
        System.out.println("second-->ondestory"); 
        super.onDestroy(); 
    }

    @Override 
    protected void onPause() { 
        System.out.println("second-->onpause"); 
        super.onPause(); 
    }

    @Override 
    protected void onResume() { 
        System.out.println("second-->onresume"); 
        super.onResume(); 
    }

    @Override 
    protected void onStart() { 
        System.out.println("second-->onstart"); 
        super.onStart(); 
    }

    @Override 
    protected void onStop() { 
        System.out.println("second-->onstop"); 
        super.onStop(); 
    }

}

activity04.xml文件：

<?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" 
    > 
    <Button 
        android:id="@ id/myButton" 
        android:layout_width="fill_parent" 
        android:layout_height="wrap_content" 
        ></Button> 
</LinearLayout>

second.xml文件：

<?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" 
    >

</LinearLayout>

 

manifest.xml

<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
    package="tk.myactivity04" 
    android:versionCode="1" 
    android:versionName="1.0" >

    <uses-sdk 
        android:minSdkVersion="8" 
        android:targetSdkVersion="15" />

    <application 
        android:icon="@drawable/ic_launcher" 
        android:label="@string/app_name" 
        android:theme="@style/AppTheme" > 
        <activity 
            android:name=".Activity04" 
            android:label="@string/title_activity_activity04" > 
            <intent-filter> 
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" /> 
            </intent-filter> 
        </activity> 
          <activity 
            android:name =".secondActivity" 
            android:label ="@string/second" 
            > 
       
        </activity> 
        
    </application>

</manifest>