Android應(yīng)用?；顚?shí)踐詳解
更新時(shí)間：2019年04月28日 10:30:21 作者：Android心路歷程
這篇文章主要介紹了Android應(yīng)用?；顚?shí)踐詳解，文中通過(guò)示例代碼介紹的非常詳細(xì)，對(duì)大家的學(xué)習(xí)或者工作具有一定的參考學(xué)習(xí)價(jià)值，需要的朋友們下面隨著小編來(lái)一起學(xué)習(xí)學(xué)習(xí)吧
最近在做的項(xiàng)目中需要app在后臺(tái)常駐，用于實(shí)時(shí)上傳一些健康信息數(shù)據(jù)，便于后臺(tái)實(shí)時(shí)查看用戶的健康狀況。自從Android7.0以上后臺(tái)常駐實(shí)現(xiàn)越來(lái)越難，尤其是8.0及以上。關(guān)于保活的文章比比皆是，但是效果并不理想，關(guān)于?；畹姆椒ㄒ簿统Ｕf(shuō)的哪幾種，重點(diǎn)在于怎么組合運(yùn)用。最終實(shí)現(xiàn)效果為：用戶不主動(dòng)強(qiáng)制殺死的話，能夠一直存活(小米，華為，vivo，oppo，三星)。其中三星s8，華為nova2s用戶強(qiáng)制殺死也能存活。
項(xiàng)目結(jié)構(gòu)
常見(jiàn)的?；罘桨?/strong>
關(guān)于Android應(yīng)用?；畹奈恼潞芏?，這里不再闡述，可自行百度。重點(diǎn)在于運(yùn)用這樣方案來(lái)實(shí)現(xiàn)保活功能。
代碼實(shí)現(xiàn)
1.監(jiān)聽(tīng)鎖屏廣播，開(kāi)啟1個(gè)像素的Activity。
在鎖屏的時(shí)候啟動(dòng)一個(gè)1個(gè)像素的Activity，當(dāng)用戶解鎖以后將這個(gè)Activity結(jié)束掉。
定義一個(gè)1像素的Activity，在該Activity中動(dòng)態(tài)注冊(cè)自定義的廣播。
class OnePixelActivity : AppCompatActivity() {
private lateinit var br: BroadcastReceiver
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
//設(shè)定一像素的activity
val window = window
window.setGravity(Gravity.LEFT or Gravity.TOP)
val params = window.attributes
params.x = 0
params.y = 0
params.height = 1
params.width = 1
window.attributes = params
//在一像素activity里注冊(cè)廣播接受者 接受到廣播結(jié)束掉一像素
br = object : BroadcastReceiver() {
override fun onReceive(context: Context, intent: Intent) {
finish()
}
}
registerReceiver(br, IntentFilter("finish activity"))
checkScreenOn()
}
override fun onResume() {
super.onResume()
checkScreenOn()
}
override fun onDestroy() {
try {
//銷(xiāo)毀的時(shí)候解鎖廣播
unregisterReceiver(br)
} catch (e: IllegalArgumentException) {
}
super.onDestroy()
}
/**
* 檢查屏幕是否點(diǎn)亮
*/
private fun checkScreenOn() {
val pm = this@OnePixelActivity.getSystemService(Context.POWER_SERVICE) as PowerManager
val isScreenOn = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT_WATCH) {
pm.isInteractive
} else {
pm.isScreenOn
}
if (isScreenOn) {
finish()
}
}
}
2.雙進(jìn)程守護(hù)
定義一個(gè)本地服務(wù)，在該服務(wù)中播放無(wú)聲音樂(lè)，并綁定遠(yuǎn)程服務(wù)。
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 {
//播放無(wú)聲音樂(lè)
if (mediaPlayer == null) {
mediaPlayer = MediaPlayer.create(this, R.raw.novioce)
//聲音設(shè)置為0
mediaPlayer?.setVolume(0f, 0f)
mediaPlayer?.isLooping = true//循環(huán)播放
play()
}
//啟用前臺(tái)服務(wù)，提升優(yōu)先級(jí)
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)
}
//綁定守護(hù)進(jìn)程
try {
val intent3 = Intent(this, RemoteService::class.java)
this.bindService(intent3, connection, Context.BIND_ABOVE_CLIENT)
} catch (e: Exception) {
}
//隱藏服務(wù)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()
}
}
}
定義一個(gè)遠(yuǎn)程服務(wù)，綁定本地服務(wù)。
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) {}
}
}
/**
* 通知欄點(diǎn)擊廣播接受者
*/
class NotificationClickReceiver : BroadcastReceiver() {
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，用于在某些指定條件下執(zhí)行后臺(tái)任務(wù)。
定義一個(gè)JobService，開(kāi)啟本地服務(wù)和遠(yuǎn)程服務(wù)
@SuppressWarnings(value = ["unchecked", "deprecation"])
@RequiresApi(Build.VERSION_CODES.LOLLIPOP)
class JobHandlerService : JobService() {
private var mJobScheduler: 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) //執(zhí)行的最小延遲時(shí)間
builder.setOverrideDeadline(JobInfo.DEFAULT_INITIAL_BACKOFF_MILLIS) //執(zhí)行的最長(zhǎng)延時(shí)時(shí)間
builder.setMinimumLatency(JobInfo.DEFAULT_INITIAL_BACKOFF_MILLIS)
builder.setBackoffCriteria(JobInfo.DEFAULT_INITIAL_BACKOFF_MILLIS, JobInfo.BACKOFF_POLICY_LINEAR)//線性重試方案
} else {
builder.setPeriodic(JobInfo.DEFAULT_INITIAL_BACKOFF_MILLIS)
}
builder.setRequiredNetworkType(JobInfo.NETWORK_TYPE_ANY)
builder.setRequiresCharging(true) // 當(dāng)插入充電器，執(zhí)行該任務(wù)
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)
}
}
//啟動(dòng)本地服務(wù)
val localIntent = Intent(context, LocalService::class.java)
//啟動(dòng)守護(hù)進(jìn)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()) {
val si = l.next()
if (className == si.service.className) {
isRunning = true
}
}
return isRunning
}
}
4.播放無(wú)聲音樂(lè)
這里使用的是有聲的mp3文件，只是在代碼中把聲音設(shè)置成了0；如果使用真正的無(wú)聲的音樂(lè)文件，在oppo手機(jī)上按下返回鍵會(huì)被立刻殺死，并且在三星手機(jī)，華為nova2s強(qiáng)制殺死也會(huì)被殺死，所有使用了有聲的文件。
5.提高Service優(yōu)先級(jí)
在 onStartCommand() 方法中開(kāi)啟一個(gè)通知，提高進(jìn)程的優(yōu)先級(jí)。注意：從Android 8.0（API級(jí)別26）開(kāi)始，所有通知必須要分配一個(gè)渠道，對(duì)于每個(gè)渠道，可以單獨(dú)設(shè)置視覺(jué)和聽(tīng)覺(jué)行為。然后用戶可以在設(shè)置中修改這些設(shè)置，根據(jù)應(yīng)用程序來(lái)決定哪些通知可以顯示或者隱藏。
定義一個(gè)通知工具類(lèi)，兼容8.0
class NotificationUtils(context: Context) : ContextWrapper(context) {
private var manager: NotificationManager? = null
private var id: String = context.packageName + "51"
private var name: String = context.packageName
private var context: Context = context
private var channel: NotificationChannel? = null
companion object {
@SuppressLint("StaticFieldLeak")
private var notificationUtils: NotificationUtils? = null
fun createNotification(context: Context, title: String, content: String, icon: Int, intent: Intent): Notification? {
if (notificationUtils == null) {
notificationUtils = NotificationUtils(context)
}
var notification: Notification? = null
notification = if (Build.VERSION.SDK_INT >= 26) {
notificationUtils?.createNotificationChannel()
notificationUtils?.getChannelNotification(title, content, icon, intent)?.build()
} else {
notificationUtils?.getNotification_25(title, content, icon, intent)?.build()
}
return notification
}
}
@RequiresApi(api = Build.VERSION_CODES.O)
fun createNotificationChannel() {
if (channel == null) {
channel = NotificationChannel(id, name, NotificationManager.IMPORTANCE_MIN)
channel?.enableLights(false)
channel?.enableVibration(false)
channel?.vibrationPattern = longArrayOf(0)
channel?.setSound(null, null)
getManager().createNotificationChannel(channel)
}
}
private fun getManager(): NotificationManager {
if (manager == null) {
manager = getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
}
return manager!!
}
@RequiresApi(api = Build.VERSION_CODES.O)
fun getChannelNotification(title: String, content: String, icon: Int, intent: Intent): Notification.Builder {
//PendingIntent.FLAG_UPDATE_CURRENT 這個(gè)類(lèi)型才能傳值
val pendingIntent = PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT)
return Notification.Builder(context, id)
.setContentTitle(title)
.setContentText(content)
.setSmallIcon(icon)
.setAutoCancel(true)
.setContentIntent(pendingIntent)
}
fun getNotification_25(title: String, content: String, icon: Int, intent: Intent): NotificationCompat.Builder {
val pendingIntent = PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT)
return NotificationCompat.Builder(context, id)
.setContentTitle(title)
.setContentText(content)
.setSmallIcon(icon)
.setAutoCancel(true)
.setVibrate(longArrayOf(0))
.setSound(null)
.setLights(0, 0, 0)
.setContentIntent(pendingIntent)
}
}
使用
將?；畹墓δ芊庋b成了一個(gè)單獨(dú)的庫(kù)，依賴(lài)該庫(kù)即可。
app中使用：
KeepLive.startWork(this, KeepLive.RunMode.ROGUE, ForegroundNotification("Title", "message",
R.mipmap.ic_launcher, object : ForegroundNotificationClickListener {
override fun foregroundNotificationClick(context: Context, intent: Intent) {
//點(diǎn)擊通知回調(diào)
}
}), object : KeepLiveService {
override fun onStop() {
//可能調(diào)用多次，跟onWorking匹配調(diào)用
}
override fun onWorking() {
//一直存活，可能調(diào)用多次
}
})
清單文件配置：
<!--權(quán)限配置--> <uses-permission android:name="android.permission.FOREGROUND_SERVICE" /> <uses-permission android:name="android.permission.GET_TASKS" /> <uses-permission android:name="android.permission.REORDER_TASKS" /> <!--?；钕嚓P(guān)配置--> <receiver android:name="com.xiyang51.keeplive.receiver.NotificationClickReceiver" /> <activity android:name="com.xiyang51.keeplive.activity.OnePixelActivity" /> <service android:name="com.xiyang51.keeplive.service.LocalService" /> <service android:name="com.xiyang51.keeplive.service.HideForegroundService" /> <service android:name="com.xiyang51.keeplive.service.JobHandlerService" android:permission="android.permission.BIND_JOB_SERVICE" /> <service android:name="com.xiyang51.keeplive.service.RemoteService" android:process=":remote" />
代碼地址 github
以上就是本文的全部?jī)?nèi)容，希望對(duì)大家的學(xué)習(xí)有所幫助，也希望大家多多支持腳本之家。
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