Android之Service

1.自定义Service类

package com.example.mars_2000_service;

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

public class FirstService extends Service {

    @Override
    public IBinder onBind(Intent intent) {
        System.out.println("Service onBind");
        return null;
    }

    // 当创建一个Servcie对象之后，会首先调用这个函数
    @Override
    public void onCreate() {
        // TODO Auto-generated method stub
        super.onCreate();
        System.out.println("Service onCreate");
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        // TODO Auto-generated method stub
        System.out.println("flags--->" + flags);
        System.out.println("startId--->" + startId);
        System.out.println("Service onStartCommand");
        return START_NOT_STICKY;
    }

    @Override
    public void onDestroy() {
        // TODO Auto-generated method stubo
        System.out.println("Service onDestory");
        super.onDestroy();
    }
}

2.启动和关闭Service

public class MainActivity extends Activity {
    private Button startServiceButton = null;
    private Button stopServiceButton = null;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        startServiceButton = (Button) findViewById(R.id.startService);
        startServiceButton.setOnClickListener(new StartServiceListener());
        stopServiceButton = (Button) findViewById(R.id.stopService);
        stopServiceButton.setOnClickListener(new StopServiceListener());
        System.out.println("Activity onCreate");

        /*if (savedInstanceState == null) {
            getSupportFragmentManager().beginTransaction()
                    .add(R.id.container, new PlaceholderFragment()).commit();
        }*/
    }

    class StartServiceListener implements OnClickListener {
        @Override
        public void onClick(View v) {
            Intent intent = new Intent();
            intent.setClass(MainActivity.this, FirstService.class);
            startService(intent);
        }
    }

    class StopServiceListener implements OnClickListener {
        @Override
        public void onClick(View v) {
            Intent intent = new Intent();
            intent.setClass(MainActivity.this, FirstService.class);
            stopService(intent);
        }
    }

3.设置权限

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.mars_2000_service"
    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.mars_2000_service.MainActivity"
            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=".FirstService"></service>
    </application>

</manifest>