(Previously, in Android, only when the phone was not used for the specified time or no operation, the hand timing was automatically determined, and the power key was used to unlock, right? Now, since APILevel8 (Android 2.2), Android has provided the DevicePolicyManager class, which allows your user program to perform screen confirmation and other operations. The following three objects to be used in the operation class of screen confirmation used in the following procedures of Xiaoma include the following attachments:)
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