国内厂商定制，除非厂商给app白名单，否则只能用户手动添加白名单(应用自启和后台运行)，才能通过前台服务实现app保活。

这里介绍前台服务相关实现方式。

开启服务：

  if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {//安卓8.0以上开启为前台服务startForegroundService(new Intent(this, KeepAliveNotificationService.class));} else {startService(new Intent(this, KeepAliveNotificationService.class));}

服务：

public class KeepAliveNotificationService extends Service {private final String CHANNEL_ONE_ID = "100";@Nullable@Overridepublic IBinder onBind(Intent intent) {return null;}@Overridepublic void onCreate() {super.onCreate();//创建通知栏常驻通知initNotification();}@Overridepublic int onStartCommand(Intent intent, int flags, int startId) {//        return super.onStartCommand(intent, flags, startId);//返回START_STICKY,被系统或手动清理后可重启return START_STICKY;}@Overridepublic void onDestroy() {stopForeground(true);}/*** 开启通知栏*/private void initNotification() {//获取管理器NotificationManager manager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);//创建点击跳转ActivityIntent intent = new Intent(this, NotificationActivity.class);PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent, 0);//创建notificationNotificationCompat.Builder builder = new NotificationCompat.Builder(getApplicationContext(), CHANNEL_ONE_ID).setContentIntent(pendingIntent) // 设置PendingIntent.setSmallIcon(R.mipmap.user_notification_ic_launcher) // 设置状态栏内的小图标//.setLargeIcon(bitmapIcon)// 设置大图标.setContentTitle("推送服务").setContentText("应用更好的接收推送服务") // 设置内容.setWhen(System.currentTimeMillis())// 设置该通知发生的时间.setVisibility(NotificationCompat.VISIBILITY_PUBLIC)// 锁屏显示全部通知//.setDefaults(Notification.DEFAULT_ALL)// //使用默认的声音、振动、闪光.setCategory(Notification.CATEGORY_SERVICE)//设置类别.setPriority(NotificationCompat.PRIORITY_MAX);// 优先级为：重要通知if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {//安卓8.0以上系统要求通知设置Channel,否则会报错NotificationChannel notificationChannel = new NotificationChannel(CHANNEL_ONE_ID, "服务常驻通知", NotificationManager.IMPORTANCE_HIGH);notificationChannel.setLockscreenVisibility(Notification.VISIBILITY_PUBLIC);//锁屏显示全部通知manager.createNotificationChannel(notificationChannel);builder.setChannelId(CHANNEL_ONE_ID);}Notification notification = builder.build(); // 获取构建好的Notification//notification.defaults = Notification.DEFAULT_SOUND; //设置为默认的声音notification.flags = Notification.FLAG_NO_CLEAR;//不消失的常驻通知startForeground(1, notification);//设置常驻通知}
}

清单文件

  <!-- 自定义 前台服务 --><serviceandroid:name="com.xx.xxxx.service.KeepAliveNotificationService"android:directBootAware="true"android:enabled="true"android:exported="true"android:foregroundServiceType="phoneCall|mediaPlayback|dataSync|mediaProjection|connectedDevice|location"android:label="@string/app_name" />