how to access sim toolkit android

Android development-Get mobile phone SIM card information, androidsim TelephonyManager is a service class that manages the call status and network information of a mobile phone. It provides a large number of getXxx () methods to obtain information about the telephone network. TelephonyManager class overview: It can be used to access telephone service information

 today, especially in China, dual sim is so popular and so widespread that dual sim has become the de facto standard for smartphones. The general trend, for this, Android from Android 5.1, starting from the Android SDK API level to support dual

Android Get SIM card operator informationTelephonymanager TM = (Telephonymanager) context.getsystemservice (Context.telephony_service); Telephonymanager uses Telephonymanager to provide access to information about the communication service on the device, and the application uses this class of methods to obtain a service provider or status for the phone. The progr

AID conflicts. The payment class is made by setting the default app, while the other class is the UI popup selection prompt.4. When the screen is off, HCE is not available, the screen is locked HCE can choose support, or you can choose to prompt the user to unlock and then support.5. In the case of the terminal only HCE no SE, ISO 14443-3 of the non-connected parameters by Android takeover, UID use random number, do not use HCE to implement any UID-b

Typically, if we want to use the SIM card Dial-up feature, we need to do a simple configuration in the setup, steps are as follows： Settings-"Wireless and network-" mobile network-(enabled data/data roaming/access point name/2G network/network operator only) We have to select the "Enabled Data" option, and then configure the access point name can be used after th

This article gives an example of how Android obtains mobile phone numbers and carrier information. Share to everyone for your reference. The implementation methods are as follows: Copy Code code as follows: Package com.pei.activity; Import android.app.Activity; Import Android.os.Bundle; Import Android.view.View; Import Android.view.View.OnClickListener; Import Android.widget.Button; Import Android.widget.TextView; /** * Class

This article is a simple analysis of using SIM card to access the Internet. WiFi is not involved. Generally, if we want to use the SIM card dial-up Internet access function, we need to make a simple configuration in the settings, the steps are as follows: Set-wireless and network-mobile network-(data/data roaming/

Android UnionPay payment access reports nullexception exception Package com. example. ex_example; import java. io. byteArrayOutputStream; import java. io. inputStream; import java.net. URL; import java.net. URLConnection; import android. app. activity; import android. app. alertDialog; import