Handler USSD API

by Romell Dominguez

Target Development High Quality:

Interactive with ussd windoows, It is necessary to have present that the interface depends on the SO and on the manufacturer of Android device.

USSD LIBRARY

latestVersion is

Add the following in your app's build.gradle file:

repositories {
    jcenter()
}
dependencies {
    implementation 'com.romellfudi.ussdlibrary:ussd-library:{latestVersion}'
}

• Writing xml config file from here to res/xml folder (if necessary), this config file allow link between App and SO:

<?xml version="1.0" encoding="utf-8"?>
<accessibility-service xmlns:android="http://schemas.android.com/apk/res/android"
    .../>

Application

Puts dependencies on manifest, into manifest put CALL_PHONE, READ_PHONE_STATE and SYSTEM_ALERT_WINDOW:

    <uses-permission android:name="android.permission.CALL_PHONE" />
    <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />
    <uses-permission android:name="android.permission.READ_PHONE_STATE" />

Add service:

    <service
        android:name="com.romellfudi.ussdlibrary.USSDService"
        android:permission="android.permission.BIND_ACCESSIBILITY_SERVICE">
        <intent-filter>
            <action android:name="android.accessibilityservice.AccessibilityService" />
        </intent-filter>
        <meta-data
            android:name="android.accessibilityservice"
            android:resource="@xml/ussd_service" />
    </service>

How use:

First you need an hashMap from detect witch USSD' response contains the login and error messages

KEY MESSAGE	String Messages
KEY_LOGIN	"espere","waiting","loading","esperando",...
KEY_ERROR	"problema","problem","error","null",...

map = new HashMap<>();
map.put("KEY_LOGIN",new HashSet<>(Arrays.asList("espere", "waiting", "loading", "esperando")));
map.put("KEY_ERROR",new HashSet<>(Arrays.asList("problema", "problem", "error", "null")));

Instance an object ussController with context

USSDApi ussdApi = USSDController.getInstance(context);
ussdApi.callUSSDInvoke(phoneNumber, map, new USSDController.CallbackInvoke() {
    @Override
    public void responseInvoke(String message) {
        // message has the response string data
        String dataToSend = "data"// <- send "data" into USSD's input text
        ussdApi.send(dataToSend,new USSDController.CallbackMessage(){
            @Override
            public void responseMessage(String message) {
                // message has the response string data from USSD
            }
        });
    }

    @Override
    public void over(String message) {
        // message has the response string data from USSD
        // response no have input text, NOT SEND ANY DATA
    }
});

if you need work with your custom messages, use this structure:

ussdApi.callUSSDInvoke(phoneNumber, map, new USSDController.CallbackInvoke() {
    @Override
    public void responseInvoke(String message) {
        // first option list - select option 1
        ussdApi.send("1",new USSDController.CallbackMessage(){
            @Override
            public void responseMessage(String message) {
                // second option list - select option 1
                ussdApi.send("1",new USSDController.CallbackMessage(){
                    @Override
                    public void responseMessage(String message) {
                        ...
                    }
                });
            }
        });
    }

    @Override
    public void over(String message) {
        // message has the response string data from USSD
        // response no have input text, NOT SEND ANY DATA
    }
    ...
});

for dual sim support

ussdApi.callUSSDInvoke(phoneNumber, simSlot, map, new USSDController.CallbackInvoke() {
    ...
}

Static Methods

In case use at android >= M, you need check permissions:

 # check if accessibility permissions is enable
    USSDController.verifyAccesibilityAccess(Activity)
 # check if overlay permissions is enable
    USSDController.verifyOverLay(Activity)

Overlay Service Widget (not required)

A huge problem working with ussd is you can not invisible, disenable, resize or put on back in progressDialog But now on Android O, Google allow build a nw kind permission from overlay widget, my solution was a widget call OverlayShowingService: For use need add permissions at AndroidManifest:

<uses-permission android:name="android.permission.ACTION_MANAGE_OVERLAY_PERMISSION" />

Using the library you could use two ways:

SplashLoadingService

Add Broadcast Service:

<service android:name="com.romellfudi.ussdlibrary.SplashLoadingService"
         android:exported="false" />

Invoke like a normal service:

Intent svc = new Intent(activity, SplashLoadingService.class);
getActivity().startService(svc);
// stop
getActivity().stopService(svc);

EXTRA: Use Voip line

In this section leave the lines to call to Telcom (ussd number) for connected it:

ussdPhoneNumber = ussdPhoneNumber.replace("#", uri);
Uri uriPhone = Uri.parse("tel:" + ussdPhoneNumber);
context.startActivity(new Intent(Intent.ACTION_CALL, uriPhone));

Once initialized the call will begin to receive and send the famous USSD windows

License

Copyright 2018 Romell D.Z.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

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