Run USSD Code in Android and Keep the App in the firstground

Question

I am creating a App in Android, which required run USSD Code in background. without send my application in background,

Whenever I am using Intent.ACTION_CALL to run USSD

String ussdCode = "*" + "123" + Uri.encode("#");
startActivity(new Intent("android.intent.action.CALL", Uri.parse("tel:" + ussdCode)));

it send my application in background, and open dialer Interface on my application.

So it is possible to run USSD code without open Dialer Interface in front.

Thanks.

Zulema

The same question with: #5449964 – Assemblage

Answer 1

Use following code:

String ussdCode = "*123#";
Intent intent = new Intent(Intent.ACTION_CALL);
intent.setData(ussdToCallableUri(ussdCode));
try{
    startActivity(intent);
} catch (SecurityException e){
    e.printStackTrace();
}

Here is the method to convert your ussd code to callable ussd:

private Uri ussdToCallableUri(String ussd) {

    String uriString = "";

    if(!ussd.startsWith("tel:"))
        uriString += "tel:";

    for(char c : ussd.toCharArray()) {

        if(c == '#')
            uriString += Uri.encode("#");
        else
            uriString += c;
    }

    return Uri.parse(uriString);
}

Affectional

I don't understand why this answer is accepted. Your code is the same as the OP has written in question. Your code just has more lines. – Scandalize

And you could've just used a string builder or even done String.replace("#", Uri.encore("#")) instead.. – Marsala