实现进程保活，暂时实现了双进程守护、JobService检测与拉起、进程死亡AlarmManager定时拉起、 广播监听（网络变化、开机等），同时通过Timer和TimerTask实现心跳服务。
1、双进程守护
双进程即本地进程和远程进程，看两个类： AbsHeartBeatService：本地进程，抽象的心跳服务 DaemonService：远程进程，即守护进程 启动本地服务后会启动远程进程的服务并绑定远程服务，同时远程服务也会绑定本地进程的服务， 任何一个服务停止都会得到另一个进程的Binder通知，即刻被拉起，实现进程保活的一种方式
2、JobService检测与拉起
Android5.0以上可以使用JobService来做定时任务，定时检测本地进程的服务是否在运行，参考JobSchedulerService， 但是个别深度定制的ROM厂商屏蔽了JobService，比如小米手机。
3、进程死亡AlarmManager定时拉起
AlarmManager是提供一种访问系统闹钟服务的方式，允许你去设置在将来的某个时间点去执行你的应用程序。 当你的闹钟时间到时，在它上面注册的一个意图(Intent)将会被系统以广播发出，然后自动启动目标程序，如果它没有正在运行。 所以，不管是我们的本地进程还是我们的远程进程，如果他们死了，就在死的时候定一个被拉活的闹钟，等待复活。
4、广播监听
动态广播监听：网络变化、开屏、锁屏、解锁、点击Home键
静态广播监听：开机、连接电源、断开电源、安装应用、卸载应用
使用方法：
继承AbsHeartBeatService抽象心跳服务，在onHeartBeat()中处理自己的任务，具体保活策略不需要关心
public class HeartBeatService extends AbsHeartBeatService {
@Override
public void onStartService() {
}
@Override
public void onStopService() {
}
@Override
public long getHeartBeatMillis() {
return 30 * 1000;
}
@Override
public void onHeartBeat() {
}
}
在Manifest中注册服务
<service android:name=”.HeartBeatService”/>
初始化并启动服务
DaemonHolder.init(this, HeartBeatService.class);
资源文件列表
DaemonService-master/.gitignore , 137
DaemonService-master/.idea/caches/build_file_checksums.ser , 598
DaemonService-master/.idea/codeStyles/Project.xml , 1775
DaemonService-master/.idea/encodings.xml , 159
DaemonService-master/.idea/gradle.xml , 688
DaemonService-master/.idea/misc.xml , 5802
DaemonService-master/.idea/runConfigurations.xml , 564
DaemonService-master/DaemonService/.gitignore , 7
DaemonService-master/DaemonService/build.gradle , 652
DaemonService-master/DaemonService/proguard-rules.pro , 751
DaemonService-master/DaemonService/src/main/AndroidManifest.xml , 1856
DaemonService-master/DaemonService/src/main/aidl/com/sunfusheng/daemon/DaemonAidl.aidl , 103
DaemonService-master/DaemonService/src/main/java/com/sunfusheng/daemon/AbsHeartBeatService.java , 3847
DaemonService-master/DaemonService/src/main/java/com/sunfusheng/daemon/DaemonHolder.java , 2836
DaemonService-master/DaemonService/src/main/java/com/sunfusheng/daemon/DaemonReceiver.java , 552
DaemonService-master/DaemonService/src/main/java/com/sunfusheng/daemon/DaemonService.java , 6023
DaemonService-master/DaemonService/src/main/java/com/sunfusheng/daemon/DaemonUtil.java , 2570
DaemonService-master/DaemonService/src/main/java/com/sunfusheng/daemon/JobSchedulerService.java , 2169
DaemonService-master/DaemonService/src/main/res/values/strings.xml , 76
DaemonService-master/README.md , 2321
DaemonService-master/Sample/.gitignore , 7
DaemonService-master/Sample/build.gradle , 754
DaemonService-master/Sample/proguard-rules.pro , 751
DaemonService-master/Sample/src/main/AndroidManifest.xml , 808
DaemonService-master/Sample/src/main/java/com/sunfusheng/daemon/sample/App.java , 529
DaemonService-master/Sample/src/main/java/com/sunfusheng/daemon/sample/HeartBeatService.java , 870
DaemonService-master/Sample/src/main/java/com/sunfusheng/daemon/sample/MainActivity.java , 798
DaemonService-master/Sample/src/main/res/drawable-v24/ic_launcher_foreground.xml , 1897
DaemonService-master/Sample/src/main/res/drawable/ic_launcher_background.xml , 5577
DaemonService-master/Sample/src/main/res/layout/activity_main.xml , 1513
DaemonService-master/Sample/src/main/res/mipmap-anydpi-v26/ic_launcher.xml , 270
DaemonService-master/Sample/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml , 270
DaemonService-master/Sample/src/main/res/mipmap-hdpi/ic_launcher.png , 3056
DaemonService-master/Sample/src/main/res/mipmap-hdpi/ic_launcher_round.png , 5024
DaemonService-master/Sample/src/main/res/mipmap-mdpi/ic_launcher.png , 2096
DaemonService-master/Sample/src/main/res/mipmap-mdpi/ic_launcher_round.png , 2858
DaemonService-master/Sample/src/main/res/mipmap-xhdpi/ic_launcher.png , 4569
DaemonService-master/Sample/src/main/res/mipmap-xhdpi/ic_launcher_round.png , 7098
DaemonService-master/Sample/src/main/res/mipmap-xxhdpi/ic_launcher.png , 6464
DaemonService-master/Sample/src/main/res/mipmap-xxhdpi/ic_launcher_round.png , 10676
DaemonService-master/Sample/src/main/res/mipmap-xxxhdpi/ic_launcher.png , 9250
DaemonService-master/Sample/src/main/res/mipmap-xxxhdpi/ic_launcher_round.png , 15523
DaemonService-master/Sample/src/main/res/values/colors.xml , 208
DaemonService-master/Sample/src/main/res/values/strings.xml , 76
DaemonService-master/Sample/src/main/res/values/styles.xml , 383
DaemonService-master/build.gradle , 298
DaemonService-master/gradle.properties , 726
DaemonService-master/gradle/wrapper/gradle-wrapper.jar , 54708
DaemonService-master/gradle/wrapper/gradle-wrapper.properties , 230
DaemonService-master/gradlew , 5296
DaemonService-master/gradlew.bat , 2176
DaemonService-master/settings.gradle , 36