java Android DevicePolicyManager lockNow()
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Android DevicePolicyManager lockNow()
提问by Devmonster
I'm new to Android development, that's why I hit a wall. I want an application to be running as a service, and monitors SMS. If a specific SMS message is received, it locks the phone (as if the lock period has expired). Kinda like a remote lock.
我是 Android 开发的新手，这就是我碰壁的原因。我希望应用程序作为服务运行，并监控 SMS。如果收到特定的 SMS 消息，它会锁定手机（就像锁定期已过）。有点像遥控锁。
I used the DevicePolicyManagerto invoke the lockNow()method. However, it triggers an error right on the part lockNow()is called.
我使用DevicePolicyManager来调用该lockNow()方法。但是，它会在lockNow()调用部分时触发错误。
Here's the sample code on the Activity:
这是 Activity 上的示例代码：
public class SMSMessagingActivity extends Activity {
/** Called when the activity is first created. */
public static DevicePolicyManager mDPM;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mDPM = (DevicePolicyManager)getSystemService(Context.DEVICE_POLICY_SERVICE);
}
public static void LockNow(){
mDPM.lockNow();
}
}
I looked at http://developer.android.com/resources/samples/ApiDemos/src/com/example/android/apis/app/DeviceAdminSample.htmlas a reference example.
Can anyone help me? Show me what's wrong with my code? Do I have to tweak something to enable Administrative Rights on the emulator or device?
谁能帮我？告诉我我的代码有什么问题？我是否必须调整某些内容才能在模拟器或设备上启用管理权限？
Thanks!
谢谢！
采纳答案by Reed
Here's something from the docs:
这是文档中的一些内容：
The calling device admin must have requested USES_POLICY_FORCE_LOCK to be able to call this method; if it has not, a security exception will be thrown.
调用设备管理员必须已请求 USES_POLICY_FORCE_LOCK 才能调用此方法；如果没有，则会抛出安全异常。
Therefore, you should do the following in your oncreate:
因此，您应该在 oncreate 中执行以下操作：
ComponentName devAdminReceiver; // this would have been declared in your class body
// then in your onCreate
mDPM = (DevicePolicyManager)getSystemService(Context.DEVICE_POLICY_SERVICE);
devAdminReceiver = new ComponentName(context, deviceAdminReceiver.class);
//then in your onResume
boolean admin = mDPM.isAdminActive(devAdminReceiver);
if (admin)
mDPM.lockNow();
else Log.i(tag,"Not an admin");
On a side note, your example code is an activity.
That, and you should just use a broadcast receiver to implement everything and monitor sms.
附带说明一下，您的示例代码是一项活动。
那，你应该只使用广播接收器来实现一切并监控短信。
Here's an API example for receiving sms:
这是接收短信的 API 示例：
