Service分类，生命周期，普通方式启动

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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="com.example.lenovo.service.MainActivity"
    android:orientation="vertical">

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="普通方式启动"
        android:onClick="bt_1"/>

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="普通方式停止"
        android:onClick="bt_2"/>

package com.example.lenovo.service;

import android.app.Service;
import android.content.Intent;
import android.os.Binder;
import android.os.IBinder;
import android.util.Log;

public class MyService extends Service {
    public MyService() {
        Log.e("TAG","MyService被创建");
    }

    @Override
    public void onCreate() {
        Log.e("TAG","onCreate被调用");
        super.onCreate();
    }

    @Override
    public void onDestroy() {
        Log.e("TAG","onDestroy被调用");
        super.onDestroy();
    }

    @Override
    public void onRebind(Intent intent) {
        Log.e("TAG","onRebind被调用");
        super.onRebind(intent);
    }

    @Override
    public boolean onUnbind(Intent intent) {
        Log.e("TAG","onUnbind被调用");
        return super.onUnbind(intent);
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        String string = intent.getStringExtra("test");
        Log.e("TAG","onStartCommand被调用,并收到数据="+string);
        return super.onStartCommand(intent, flags, startId);
    }

    public class MyBinder extends Binder
    {
        //定义数据交换的方法

    }

    //回调方法
    //绑定
    @Override
    public IBinder onBind(Intent intent) {
        Log.e("TAG","onBind被调用");
        // TODO: Return the communication channel to the service.

        //throw new UnsupportedOperationException("Not yet implemented");
        return new MyBinder();
    }
}

package com.example.lenovo.service;

import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.os.IBinder;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    //普通方式启动
    public void bt_1(View v)
    {
        //准备Intent:显式意图
        Intent intent = new Intent(this,MyService.class);
        intent.putExtra("test","发送的数据");
        //启动Service
        startService(intent);
        Toast.makeText(MainActivity.this, "Service已启动", Toast.LENGTH_SHORT).show();
    }
    //普通方式关闭
    public void bt_2(View v)
    {
        //准备Intent:显式意图
        Intent intent = new Intent(this,MyService.class);
        //关闭Service
        stopService(intent);
        Toast.makeText(MainActivity.this, "Service已停止", Toast.LENGTH_SHORT).show();
    }

继承于Service,并在AndroidManifest中注册