我是Android開(kāi)發(fā)的新手,這就是我開(kāi)門(mén)的原因.我希望應(yīng)用程序作為服務(wù)運(yùn)行,并監(jiān)視SMS.如果收到特定的SMS消息,它將鎖定電話(就像鎖定期限已過(guò)期一樣).有點(diǎn)像遙控鎖.

我使用DevicePolicyManager來(lái)調(diào)用lockNow()方法.但是,它會(huì)在調(diào)用部分lockNow()時(shí)觸發(fā)錯(cuò)誤.

以下是活動(dòng)的示例代碼：

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();

}

}

誰(shuí)能幫我？告訴我我的代碼有什么問(wèn)題？我是否必須調(diào)整某些內(nèi)容才能在模擬器或設(shè)備上啟用管理權(quán)限？

謝謝！

解決方法:

這是來(lái)自文檔的東西：

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.

因此,您應(yīng)該在oncreate中執(zhí)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");

另外,您的示例代碼是一項(xiàng)活動(dòng).

那,你應(yīng)該只使用廣播接收器來(lái)實(shí)現(xiàn)一切并監(jiān)控短信.

這是接收短信的API示例：

標(biāo)簽：java,android,sms

來(lái)源： https://codeday.me/bug/20190630/1338255.html

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