power management笔记

一、APP调用goToSleep,权限检查失败,虚拟机shut down是报错：

java.lang.SecurityException: Neither user nor current process has android.permission.DEVICE_POWER.

解决办法：

public void goToSleep(long time)
{
Log.d(TAG,"goToSleep/n");

//注释掉这句代码
//mContext.enforceCallingOrSelfPermission(android.Manifest.permission.DEVICE_POWER, null);
synchronized (mLocks) {
goToSleepLocked(time);
}
}

二、唤醒之后直接回到睡眠前的状态，不要显示锁屏：

方法1（这种改法会影响所有的应用及其他用到唤醒的地方）：

frameworks/policies/base/phone/com/android/internal/policy/impl/KeyguardUpdateMonitor.java

中，把如下的函数直接返回false

public boolean isDeviceProvisioned() {
//return mDeviceProvisioned;
return false;
}

方法2（只针对当前应用）：
SDK文档里面有这个接口:
KeyguardManager.KeyguardLock

KeyguardManager keyguardManager = (KeyguardManager)getSystemService(Activity.KEYGUARD_SERVICE);
KeyguardLock lock = keyguardManager.newKeyguardLock(KEYGUARD_SERVICE);
lock.disableKeyguard();