android Service:分别继承IntetnService与Service示例

实现继承IntentService：

activity_main.xml:

<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"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >

    <Button android:id="@+id/current_time"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="当前时间"
        android:textColor="@android:color/white"
        android:textSize="25dp"/>

</RelativeLayout>

CurrentTimeActivity.java

package com.example.demoservice;

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

public class CurrentTimeActivity extends Activity {

	protected void onCreate(Bundle savedInstanceState){
		super.onCreate(savedInstanceState);
		
		setContentView(R.layout.activity_main);
		Button currentTime = (Button)findViewById(R.id.current_time);
		currentTime.setOnClickListener(new View.OnClickListener() {
			
			@Override
			public void onClick(View view) {
				startService(new Intent(CurrentTimeActivity.this,CurrentTimeService.class));
			}
		});
	}
}

CurrentTimeService.java:

package com.example.demoservice;

import android.app.IntentService;
import android.content.Intent;
import android.text.format.Time;
import android.util.Log;

public class CurrentTimeService extends IntentService {
	
	public CurrentTimeService(){
		super("CurrentTimeService");
	}

	@Override
	protected void onHandleIntent(Intent arg0) {

		Time time = new Time();
		time.setToNow();
		String currentTime = time.format("%Y-%m-%d %H:%M:%S");
		Log.i("CurrentTimeService", currentTime);
	}

}

AndroidManifest.xml:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.demoservice"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="19" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.example.demoservice.CurrentTimeActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <service android:name="com.example.demoservice.CurrentTimeService"/>
    </application>

</manifest>

2.实现继承Service：

CurrentTimeService1.java：

package com.example.demoservice;

import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
import android.text.format.Time;
import android.util.Log;

public class CurrentTimeService1 extends Service {
	
	public IBinder onBind(Intent intent){
		return null;
	}

	public int onStartCommand(Intent intent,int flags ,int startId){
		Time time = new Time();
		time.setToNow();
		String currentTime = time.format("%Y-%m-%d %H:%M:%S");
		Log.i("CurrentTimeService", currentTime);
		return START_STICKY;
	}
}

CurrentTimeService.java中修改代码行：

startService(new Intent(CurrentTimeActivity.this,CurrentTimeService.class));

为：

startService(new Intent(CurrentTimeActivity.this,CurrentTimeService1.class));

修改manifest.xml文件：

<service android:name="com.example.demoservice.CurrentTimeService1"/>