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android 6.0系统中保活机制,所以在系统内存不够的时候,后台运行的app有可能会被系统杀掉
所以为了让app不能系统杀掉保持永久运行 就必须要增加权限,把app 添加到保活白名单里面
或者授予后台运行的权限
接下来看Settings的源码
REQUEST_IGNORE_BATTERY_OPTIMIZATIONS 权限就是忽略被电池优化的权限 在普通app里面也可以申请这个权限
申请完这个权限后就不会被优化 可以一直在后台运行
在Settings的源码中
RequestIgnoreBatteryOptimizations.java 就负责管理电池优化的类
路径:
packages/apps/Settings/src/com/android/settings/fuelgauge/RequestIgnoreBatteryOptimizations.java
接下来看下源码
public class RequestIgnoreBatteryOptimizations extends AlertActivity
implements DialogInterface.OnClickListener{ static final String TAG =
"RequestIgnoreBatteryOptimizations"; private static final String
DEVICE_IDLE_SERVICE=