Service分类，生命周期，普通方式启动

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();
}