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Android应用保活实践，安卓framework开发书籍

作者：互联网

unregisterReceiver(br)
} catch (e: IllegalArgumentException) {
}
super.onDestroy()
}

/**

#####2.双进程守护
定义一个本地服务，在该服务中播放无声音乐，并绑定远程服务。

class LocalService : Service() {
private var mediaPlayer: MediaPlayer? = null
private var mBilder: MyBilder? = null

override fun onCreate() {
super.onCreate()
if (mBilder == null) {
mBilder = MyBilder()
}
}

override fun onBind(intent: Intent): IBinder? {
return mBilder
}

override fun onStartCommand(intent: Intent, flags: Int, startId: Int): Int {
//播放无声音乐
if (mediaPlayer == null) {
mediaPlayer = MediaPlayer.create(this, R.raw.novioce)
//声音设置为0
mediaPlayer?.setVolume(0f, 0f)
mediaPlayer?.isLooping = true//循环播放
play()
}
//启用前台服务，提升优先级
if (KeepLive.foregroundNotification != null) {
val intent2 = Intent(applicationContext, NotificationClickReceiver::class.java)
intent2.action = NotificationClickReceiver.CLICK_NOTIFICATION
val notification = NotificationUtils.createNotification(this, KeepLive.foregroundNotification!!.getTitle(), KeepLive.foregroundNotification!!.getDescription(), KeepLive.foregroundNotification!!.getIconRes(), intent2)
startForeground(13691, notification)
}
//绑定守护进程
try {
val intent3 = Intent(this, RemoteService::class.java)
this.bindService(intent3, connection, Context.BIND_ABOVE_CLIENT)
} catch (e: Exception) {
}

//隐藏服务通知
try {
if (Build.VERSION.SDK_INT < 25) {
startService(Intent(this, HideForegroundService::class.java))
}
} catch (e: Exception) {
}

if (KeepLive.keepLiveService != null) {
KeepLive.keepLiveService!!.onWorking()
}
return Service.START_STICKY
}

private fun play() {
if (mediaPlayer != null && !mediaPlayer!!.isPlaying) {
mediaPlayer?.start()
}
}

private inner class MyBilder : GuardAidl.Stub() {

@Throws(RemoteException::class)
override fun wakeUp(title: String, discription: String, iconRes: Int) {

}
}

private val connection = object : ServiceConnection {

override fun onServiceDisconnected(name: ComponentName) {
val remoteService = Intent(this@LocalService,
RemoteService::class.java)
this@LocalService.startService(remoteService)
val intent = Intent(this@LocalService, RemoteService::class.java)
this@LocalService.bindService(intent, this,
Context.BIND_ABOVE_CLIENT)
}

override fun onServiceConnected(name: ComponentName, service: IBinder) {
try {
if (mBilder != null && KeepLive.foregroundNotification != null) {
val guardAidl = GuardAidl.Stub.asInterface(service)
guardAidl.wakeUp(KeepLive.foregroundNotification?.getTitle(), KeepLive.foregroundNotification?.getDescription(), KeepLive.foregroundNotification!!.getIconRes())
}
} catch (e: RemoteException) {
e.printStackTrace()
}

}
}

override fun onDestroy() {
super.onDestroy()
unbindService(connection)
if (KeepLive.keepLiveService != null) {
KeepLive.keepLiveService?.onStop()
}
}
}

定义一个远程服务，绑定本地服务。

class RemoteService : Service() {

private var mBilder: MyBilder? = null

override fun onCreate() {
super.onCreate()
if (mBilder == null) {
mBilder = MyBilder()
}
}

override fun onBind(intent: Intent): IBinder? {
return mBilder
}

override fun onStartCommand(intent: Intent, flags: Int, startId: Int): Int {
try {
this.bindService(Intent(this@RemoteService, LocalService::class.java),
connection, Context.BIND_ABOVE_CLIENT)
} catch (e: Exception) {
}
return Service.START_STICKY
}

override fun onDestroy() {
super.onDestroy()
unbindService(connection)
}

private inner class MyBilder : GuardAidl.Stub() {
@Throws(RemoteException::class)
override fun wakeUp(title: String, discription: String, iconRes: Int) {
if (Build.VERSION.SDK_INT < 25) {
val intent = Intent(applicationContext, NotificationClickReceiver::class.java)
intent.action = NotificationClickReceiver.CLICK_NOTIFICATION
val notification = NotificationUtils.createNotification(this@RemoteService, title, discription, iconRes, intent)
this@RemoteService.startForeground(13691, notification)
}
}
}

private val connection = object : ServiceConnection {
override fun onServiceDisconnected(name: ComponentName) {
val remoteService = Intent(this@RemoteService,
LocalService::class.java)
this@RemoteService.startService(remoteService)
this@RemoteService.bindService(Intent(this@RemoteService,
LocalService::class.java), this, Context.BIND_ABOVE_CLIENT)
}

override fun onServiceConnected(name: ComponentName, service: IBinder) {}
}

}

/**

companion object {
const val CLICK_NOTIFICATION = “CLICK_NOTIFICATION”
}

override fun onReceive(context: Context, intent: Intent) {
if (intent.action == NotificationClickReceiver.CLICK_NOTIFICATION) {
if (KeepLive.foregroundNotification != null) {
if (KeepLive.foregroundNotification!!.getForegroundNotificationClickListener() != null) {
KeepLive.foregroundNotification!!.getForegroundNotificationClickListener()?.foregroundNotificationClick(context, intent)
}
}
}
}
}

#####3.JobScheduler
JobScheduler和JobService是安卓在api 21中增加的接口，用于在某些指定条件下执行后台任务。

定义一个JobService，开启本地服务和远程服务

@SuppressWarnings(value = [“unchecked”, “deprecation”])
@RequiresApi(Build.VERSION_CODES.LOLLIPOP)
class JobHandlerService : JobService() {

private var mJobSchedul
er: JobScheduler? = null

override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
var startId = startId
startService(this)
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
mJobScheduler = getSystemService(Context.JOB_SCHEDULER_SERVICE) as JobScheduler
val builder = JobInfo.Builder(startId++,
ComponentName(packageName, JobHandlerService::class.java.name))
if (Build.VERSION.SDK_INT >= 24) {
builder.setMinimumLatency(JobInfo.DEFAULT_INITIAL_BACKOFF_MILLIS) //执行的最小延迟时间
builder.setOverrideDeadline(JobInfo.DEFAULT_INITIAL_BACKOFF_MILLIS) //执行的最长延时时间
builder.setMinimumLatency(JobInfo.DEFAULT_INITIAL_BACKOFF_MILLIS)
builder.setBackoffCriteria(JobInfo.DEFAULT_INITIAL_BACKOFF_MILLIS, JobInfo.BACKOFF_POLICY_LINEAR)//线性重试方案
} else {
builder.setPeriodic(JobInfo.DEFAULT_INITIAL_BACKOFF_MILLIS)
}
builder.setRequiredNetworkType(JobInfo.NETWORK_TYPE_ANY)
builder.setRequiresCharging(true) // 当插入充电器，执行该任务
mJobScheduler?.schedule(builder.build())
}
return Service.START_STICKY
}

private fun startService(context: Context) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
if (KeepLive.foregroundNotification != null) {
val intent = Intent(applicationContext, NotificationClickReceiver::class.java)
intent.action = NotificationClickReceiver.CLICK_NOTIFICATION
val notification = NotificationUtils.createNotification(this, KeepLive.foregroundNotification!!.getTitle(), KeepLive.foregroundNotification!!.getDescription(), KeepLive.foregroundNotification!!.getIconRes(), intent)
startForeground(13691, notification)
}
}
//启动本地服务
val localIntent = Intent(context, LocalService::class.java)
//启动守护进程
val guardIntent = Intent(context, RemoteService::class.java)
startService(localIntent)
startService(guardIntent)
}

override fun onStartJob(jobParameters: JobParameters): Boolean {
if (!isServiceRunning(applicationContext, “com.xiyang51.keeplive.service.LocalService”) || !isServiceRunning(applicationContext, “$packageName:remote”)) {
startService(this)
}
return false
}

override fun onStopJob(jobParameters: JobParameters): Boolean {
if (!isServiceRunning(applicationContext, “com.xiyang51.keeplive.service.LocalService”) || !isServiceRunning(applicationContext, “$packageName:remote”)) {
startService(this)
}
return false
}

private fun isServiceRunning(ctx: Context, className: String): Boolean {
var isRunning = false
val activityManager = ctx
.getSystemService(Context.ACTIVITY_SERVICE) as ActivityManager
val servicesList = activityManager
.getRunningServices(Integer.MAX_VALUE)
val l = servicesList.iterator()
while (l.hasNext()) {
assName: String): Boolean {
var isRunning = false
val activityManager = ctx
.getSystemService(Context.ACTIVITY_SERVICE) as ActivityManager
val servicesList = activityManager
.getRunningServices(Integer.MAX_VALUE)
val l = servicesList.iterator()
while (l.hasNext()) {

标签：val,安卓,保活,framework,Intent,override,fun,KeepLive,class
来源： https://blog.csdn.net/sa3221sa/article/details/122666093