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How to Get Response from USSD code from Android?

I have written an application that uses ussd code. I want to send a request for a ussd but I don't know how to get the data and save it in a String.

sample code:

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    Button btn = (Button) findViewById(R.id.button1);

    btn.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub

            String encodedHash = Uri.encode("#");
            String ussd = "*141*1" + encodedHash;
            startActivityForResult(new Intent("android.intent.action.CALL",
                    Uri.parse("tel:" + ussd)), 1);

        }
    });
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    // TODO Auto-generated method stub
    super.onActivityResult(requestCode, resultCode, data);

    Toast.makeText(getApplicationContext(),
            "USSD: " + requestCode + "  " + resultCode + " ", 1).show();

    if (requestCode == 1) {

        if (resultCode == RESULT_OK) {
            // String result=data.getStringExtra("result");
            String dd = data.toString();
            Toast.makeText(getApplicationContext(), dd, 1).show();
        }

    }

Screenshots application: enter image description here

enter image description here

how to Resolve my Problem?

like image 586
sr.farzad Avatar asked Sep 28 '13 11:09

sr.farzad


People also ask

What is USSD code running on Android?

Unstructured Supplementary Service Data (USSD)—sometimes known as "quick codes" or "feature codes"—is an extra-UI protocol, which allows people to access hidden features.

How do I use USSD code?

USSD is a technology platform through which information can be transmitted through a GSM network on a basic phone. This service will be available on all mobile phones with SMS facility. To use USSD mobile banking, users will have to simply dial *99# and use the interactive menu.

What does USSD code running on my phone mean?

USSD code running on your Android phone means that your phone is entered into the process to provide you with the information you want.

Where is the USSD code?

This app can be found on your home screen, on the "All Apps" screen, or, on simpler cell phones, on the lock screen. Dial the USSD code. Some start with *, others #, and others *#. Dial #.


1 Answers

Dialing a USSD code from a custom activity is straight forward using a DIAL or CALL intent, but listening to the returned result is not due to Android not having proper support for intercepting USSD calls within the platform, but partial though undocumented support exists within the native dialer application.

As a start, look at the PhoneUtils class in the Android source code. The link is for 4.0.3 but I believe this partial support has been present since 2.3.

Specifically, looking at line 217, an intent with the name “com.android.ussd.IExtendedNetworkService” is being composed. So what you need to do is implement your own service that responds to that intent. The service needs to be implemented according to the IExtendedNetworkService.aidl which is a part of the Android framework.

The aidl exposes several functions but the one we care about is the getUserMessage(text) function in that service. The text is the final value returned from the USSD call.

Notes:

  • Since the service is binded on by PhoneUtils, then you need to start the service at phone boot up. It also means that any modification to the service will need a phone reboot.
  • Returning null from getUserMessage will suppress the dialer from showing the USSD result but there’s no way to completely hide the dialer.
  • You can also use the other functions to change the text shown while the call is in progress.
  • This doesn’t seem to work on USSD prompts(menus), only on final results.

Checkout an example code on github here.

like image 104
Gondy Avatar answered Oct 17 '22 22:10

Gondy