android 点亮屏幕与锁定屏幕

PowerManager pm=(PowerManager) getSystemService(Context.POWER_SERVICE);
//获取电源管理器对象
PowerManager.WakeLock wl = pm.newWakeLock(PowerManager.ACQUIRE_CAUSES_WAKEUP | PowerManager.SCREEN_DIM_WAKE_LOCK, "bright");
//获取PowerManager.WakeLock对象,后面的参数|表示同时传入两个值,最后的是LogCat里用的Tag
wl.acquire();
//点亮屏幕

KeyguardManager km= (KeyguardManager) getSystemService(Context.KEYGUARD_SERVICE);
//得到键盘锁管理器对象
KeyguardLock kl = km.newKeyguardLock("unLock");
//参数是LogCat里用的Tag
kl.disableKeyguard();
//解锁

/*
* 这里写程序的其他代码
*
* */

kl.reenableKeyguard();
//重新启用自动加锁
wl.release();
//释放
};

还需要一个广播唉

private DevicePolicyManager policyManager;
private ComponentName componentName;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);

// startService(new Intent().setAction("lzh00.workService"));
// finish();
policyManager = (DevicePolicyManager) getSystemService(Context.DEVICE_POLICY_SERVICE);
componentName = new ComponentName(this, MyReceiver.class);

if (policyManager.isAdminActive(componentName)) { // 判断是否有权限(激活了设备管理器)
policyManager.lockNow();// 直接锁屏
finish();
} else {
activeManager();// 激活设备管理器获取权限
// finish();
}

}

/**
* 获取锁屏权限
*/
private void activeManager() {
//使用隐式意图调用系统方法来激活指定的设备管理器
Intent intent = new Intent(DevicePolicyManager.ACTION_ADD_DEVICE_ADMIN);
intent.putExtra(DevicePolicyManager.EXTRA_DEVICE_ADMIN, componentName);
intent.putExtra(DevicePolicyManager.EXTRA_ADD_EXPLANATION, "一键锁屏");
startActivity(intent);
}