Local Service

Start and stop

Manifest


    复制代码

val intent = Intent(this, MyService::class.java)startService(intent)stopService(intent)复制代码

Bind and unbind

MyService

class MyService : Service() {    class LocalBinder : Binder() {        fun getTime(): Long {            return System.currentTimeMillis()        }    }    private var mLocalBinder = LocalBinder()    override fun onBind(intent: Intent): IBinder? {        log("onBind")        return mLocalBinder    }}复制代码

private val mServiceConnection = object : ServiceConnection {    override fun onServiceConnected(name: ComponentName, service: IBinder) {        mLocalService = service as MyService.LocalBinder    }    override fun onServiceDisconnected(name: ComponentName) {    }}val intent = Intent(this, MyService::class.java)bindService(intent)unbindService(intent)复制代码

start,stop,bind,unbind 混合调用

stopService只会让Service停止，unbindService只会让Service和context解除关联。

一个service必须要在既没有和任何context关联又处在停止状态的时候才会被销毁。

start,stop,bind,unbind 各类调用场景日志

--- start serviceonCreateonStart--- start serviceonStart--- stop serviceonDestroy复制代码

--- bind serviceonCreateonBind--- bind service--- unBind serviceonUnbindonDestroy复制代码

--- start serviceonCreateonStart--- bind serviceonBind--- stop service--- unBind serviceonUnbindonDestroy复制代码

--- start serviceonCreateonStart--- bind serviceonBind--- stop service--- unBind serviceonUnbindonDestroy复制代码

前台Service

调用service的startForeground即可

@Override    public void onCreate() {        super.onCreate();        startForeground(1, new Notification(R.mipmap.ic_launcher, "title", System.currentTimeMillis()));    }复制代码

Remote Service

Removete service 在另一个进程中运行。不能直接bind，要bind要AIDL

RemoteService 声明

外部APP启动remote service

Intent intent = new Intent("com.example.servicetest.MyAIDLService");bindService(intent, connection, BIND_AUTO_CREATE);复制代码

AIDL 使用步骤

1. 在项目中新建aild文件（例如 IMServiceAidl.aidl)，在文件中写接口函数，sync工程，IDE会自动生成aidl对应的文件(IMServiceAidl.java)，文件中有。

编写的 IMyServiceAidl.aidl

package com.example.demo0109.service;interface IMyServiceAidl {    long getTime();}复制代码

生成类 IMyServiceAidl.java 的结构

2. bind service

private ServiceConnection mServiceConnection = new ServiceConnection() {        @Override        public void onServiceConnected(ComponentName name, IBinder service) {            mMyServiceAidl = IMyServiceAidl.Stub.asInterface(service);        }        @Override        public void onServiceDisconnected(ComponentName name) {            mMyServiceAidl = null;        }    };复制代码

bind service的时候，remote service 与 local service 的区别

// common servicemMyService = (MyService) iBinder;// remote servicemMyServiceAidl = IMyServiceAidl.Stub.asInterface(iBinder);复制代码

附录：完整代码

MainActivity.kt

class MainActivity : AppCompatActivity() {    private var mRemoteBinder: IMyServiceAidl? = null    private var mLocalService: MyService.LocalBinder? = null    private val mServiceConnection = object : ServiceConnection {        override fun onServiceConnected(name: ComponentName, service: IBinder) {            mLocalService = service as MyService.LocalBinder//            mRemoteBinder = IMyServiceAidl.Stub.asInterface(service)        }        override fun onServiceDisconnected(name: ComponentName) {        }    }    override fun onCreate(savedInstanceState: Bundle?) {        super.onCreate(savedInstanceState)        setContentView(R.layout.activity_main)        val intent = Intent(this, MyService::class.java)        bt_start_service.setOnClickListener {            log("--- start service")            startService(intent)        }        bt_stop_service.setOnClickListener {            log("--- stop service")            stopService(intent)        }        bt_bind_service.setOnClickListener {            log("--- bind service")            bindService(intent, mServiceConnection, Service.BIND_AUTO_CREATE)        }        bt_unbind_service.setOnClickListener {            log("--- unBind service")            unbindService(mServiceConnection)        }    }    private fun log(s: String) {        Log.d("MyService", s)    }}复制代码

MyService.kt

class MyService : Service() {    class LocalBinder : Binder() {        fun getTime(): Long {            return System.currentTimeMillis()        }    }    private var mLocalBinder = LocalBinder()    private var mRemoteBinder: IMyServiceAidl.Stub = object : IMyServiceAidl.Stub() {        @Throws(RemoteException::class)        override fun getTime(): Long {            return System.currentTimeMillis()        }    }    override fun onBind(intent: Intent): IBinder? {        log("onBind")        return mLocalBinder//        return mRemoteBinder    }    override fun onUnbind(intent: Intent): Boolean {        log("onUnbind")        return super.onUnbind(intent)    }    override fun onCreate() {        super.onCreate()        startForeground(1, Notification(R.mipmap.ic_launcher, "title", System.currentTimeMillis()))        log("onCreate")    }    override fun onStartCommand(intent: Intent, flags: Int, startId: Int): Int {        log("onStart")        return super.onStartCommand(intent, flags, startId)    }    override fun onDestroy() {        super.onDestroy()        log("onDestroy")    }    private fun log(s: String) {        Log.d(javaClass.simpleName, s)    }}复制代码

IMyServiceAidl.aidl

package com.example.demo0109.service;interface IMyServiceAidl {    long getTime();}复制代码

Manifest.xml

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