api文档有具体说明:

    Develop
		-->Administration
			-->Device Administration

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自定义一个类继承广播接收者DeviceAdminReceiver
清单文件注册
				<receiver
					android:name=".receiver.TheAdminReceiver"
					android:label="@string/device_admin_lable"
					android:description="@string/device_admin_des"
					android:permission="android.permission.BIND_DEVICE_ADMIN" >
					<meta-data
						android:name="android.app.device_admin"
						android:resource="@xml/device_admin" >
					</meta-data>

					<intent-filter>
						<action android:name="android.app.action.DEVICE_ADMIN_ENABLED" />
					</intent-filter>
				</receiver>

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通过系统服务 获取设备管理器DevicePolicyManager
判断用户是否激活
				ComponentName who = new ComponentName(this, MyDeviceAdminReceiver.class)//DeviceAdminReceiver的空继承类不用重新任何方法
				mgr.isAdminActive(who);
若激活直接mgr.lockNow();
若未激活,隐式启动设备管理器激活页面 回调后锁屏
				隐式意图:
				Intent intent = new Intent(DevicePolicyManager.ACTION_ADD_DEVICE_ADMIN);
				intent.putExtra(DevicePolicyManager.EXTRA_DEVICE_ADMIN, who);
				intent.putExtra(DevicePolicyManager.EXTRA_ADD_EXPLANATION,getString(R.string.admin_desc));

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    属性android:resource="@xml/device_admin_sample"
	对应xml文件:

				<device-admin xmlns:android="http://schemas.android.com/apk/res/android">
				  <uses-policies>
					<limit-password />
					<watch-login />
					<reset-password />
					<force-lock />
					<wipe-data />
					<expire-password />
					<encrypted-storage />
					<disable-camera />
				  </uses-policies>
				</device-admin>