How to create a dialog box in my app that asks me to select a sim if the device has dual sim?

Question

I am writing a messaging app in android studio. When I hit the send button it should show me the option to select a sim card if the device has dual sim. If not it should not show the dialog box and should select the default by its own. What should be used for this scenario?

Comments

Official google devices have no this function. current Android platform does not have support for multiple SIMs. A device with such support has been customized for this, so you will need to get information from that device's manufacturer for any facilities they have to interact with it.

Answer 1

Hi, as far as I know there is no direct way to trigger an in-built dialog box. So, I would suggest to get the sim information first then create a dialog box on your own. There are more than 1 ways to accomplish this. One method is to use reflection and other way is to read from system db located at /data/data/com.android.providers.telephony/databases/telephony.db. But both of these methods are not so reliable (may not work on all the devices).

However, if you are target is Android 22 and above, then using android SubscriptionManager and SmsManager is reliable.

Get sim(s) information with,

SubscriptionManager subscriptionManager = SubscriptionManager.from(getApplicationContext());
List<SubscriptionInfo> subscriptionInfoList = subscriptionManager.getActiveSubscriptionInfoList();
List<double> subscriptionIds = new ArrayList<double>();
for (SubscriptionInfo subscriptionInfo : subscriptionInfoList) {
    subscriptionIds.add(subscriptionInfo.getSubscriptionId());
}

// subscriptionIds will have the information about the sims
// Create your own dialog box to handle the selection

Send the sms with,

SmsManager.getSmsManagerForSubscriptionId(int subscriptionId).sendTextMessage(String destinationAddress, String scAddress, String text,PendingIntent sentIntent, PendingIntent deliveryIntent);

Hope this helps!

Comments

Thank you

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Welcome. :)

Answer 2

All methods to handle multiSIM devices uses subscriptionId. You can get it thru SubscriptionManager.
MultiSIM devices are handled by Android since API level 22 (Android 5.1).

https://developer.android.com/reference/android/telephony/SubscriptionManager.html