service的生命週期

測試service的生命週期的程序，運行效果如下：

首先，對頁面進行佈局：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <Button
        android:id="@+id/start"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="157dp"
        android:text="@string/start" />

    <Button
        android:id="@+id/stop"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/start"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="36dp"
        android:text="@string/stop" />

</RelativeLayout>

其次，編寫service類：

package com.bzu.servicelifecycle;

import android.app.Service;
import android.content.Intent;
import android.os.IBinder;

public class LifeCycleService extends Service {

	@Override
	public IBinder onBind(Intent arg0) {
		return null;
	}

	@Override
	public void onCreate() {
		super.onCreate();
		System.out.println("onCreate()....");
	}
	@Override
	public void onStart(Intent intent, int startId) {
		super.onStart(intent, startId);
		System.out.println("onStart()...."+""+startId);
	}
	@Override
	public void onDestroy() {
		super.onDestroy();
		System.out.println("onDestroy()....");
	}
}

最後，主要的Activity類：

package com.bzu.servicelifecycle;

import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.support.v4.app.NavUtils;

public class ServiceLifeCycleActivity extends Activity {
    private Button start;
    private Button stop;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_service_life_cycle);
        start=(Button) this.findViewById(R.id.start);
        stop=(Button) this.findViewById(R.id.stop);
        start.setOnClickListener(new OnClickListener() {
			
			@Override
			public void onClick(View v) {
				Intent intent=new Intent();
				intent.setClass(ServiceLifeCycleActivity.this, LifeCycleService.class);
				startService(intent);
			}
		});
        stop.setOnClickListener(new OnClickListener() {
			
			@Override
			public void onClick(View v) {
				Intent intent=new Intent();
				intent.setClass(ServiceLifeCycleActivity.this, LifeCycleService.class);
				stopService(intent);
			}
		});
    }

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

    
}

注意：在AndroidManifest.xml文件中註冊service：

<service android:name="LifeCycleService"></service>

否則會出下如下異常：

Unable to start service Intent { cmp=com.bzu.servicelifecycle/.LifeCycleService }: not found