I started a post here still nothing to help me…. The thing is when I register the broadcast receiver via the manifest, it works fine. But when I do the same in Main UI, it seems to not be registering… Even breakpoints inside it are not triggered…. I have no idea to know how to debug this situation… I need it registered programmaitically for two reasons : – broadcast registered in manifest seems to stay alive even after application is shutdown – I using the result of the boradcast in a Main UI class variable… (when registered via manifest, the broadcast is a class separated from Main UI class…

Below is the code that seems to not be registeing my receiver

public class MainActivity extends AppCompatActivity {

    public ServerSocket serverSocket;      public ServerSocket getServerSocket() {         return serverSocket;     }      @Override     protected void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.activity_main);          btnDemarrer.setOnClickListener(new View.OnClickListener() {             @Override             public void onClick(View v) {                  Thread socketServerThread = new Thread(new SocketServerThread());                 socketServerThread.start();             }         });     }      @Override     public void onResume() {         super.onResume();         IntentFilter filter = new IntentFilter("android.provider.Telephony.SMS_RECEIVED");         MainActivity.this.registerReceiver(smsReceived, filter);         sendBroadcast(new Intent("android.provider.Telephony.SMS_RECEIVED"));     }      @Override     public void onPause() {         MainActivity.this.unregisterReceiver(smsReceived);         super.onPause();     }      private class SocketServerThread extends Thread {          static final int SocketServerPORT = 7777;          @Override         public void run() {             try {                 serverSocket = new ServerSocket(SocketServerPORT);                  while (true) {                     Socket socket = serverSocket.accept();                      SocketServerReceiveThread socketServerReplyThread                             = new SocketServerReceiveThread(socket);                     socketServerReplyThread.run();                 }             } catch (IOException e) {                 e.printStackTrace();     }}}      private class SocketServerReceiveThread  extends Thread {          private Socket hostThreadSocket;          SocketServerReceiveThread(Socket socket) {             hostThreadSocket = socket;         }          @Override         public void run() {             try{                 InputStream is = hostThreadSocket.getInputStream();                 ObjectInputStream ois = new ObjectInputStream(is);                  //Launch USSD query              }catch(Exception e){                 e.printStackTrace();     }}}      private class SocketServerReplyThread  extends Thread {          private Socket hostThreadSocket;         private String sms;         SocketServerReplyThread(Socket socket, String sms) {             hostThreadSocket = socket;             this.sms = sms;         }          @Override         public void run() {             try{                  OutputStream os = hostThreadSocket.getOutputStream();                 ObjectOutputStream oos = new ObjectOutputStream(os);                  MyClass myclass = new MyClass();                 myclass.setSms(sms);                 oos.writeObject(dt2);                 hostThreadSocket.close();              }catch(Exception e){                 e.printStackTrace();     }}}      BroadcastReceiver smsReceived = new BroadcastReceiver() {          @Override         public void onReceive(Context context, Intent intent) {             if (intent.getAction().                     equals("android.provider.Telephony.SMS_RECEIVED")) {                 StringBuilder sb = new StringBuilder();                 Bundle bundle = intent.getExtras();                 if (bundle != null) {                     Object[] pdus = (Object[])                             bundle.get("pdus");                     for (Object pdu : pdus) {                         SmsMessage smsMessage =                                 SmsMessage.createFromPdu                                         ((byte[]) pdu);                         sb.append("body - " + smsMessage.                                 getDisplayMessageBody());                     }                      Toast.makeText(context,sb.toString(),Toast.LENGTH_LONG); //This is not popping up                      try {                         Socket socket = getServerSocket().accept();                         SocketServerReplyThread socketServerReplyThread = new SocketServerReplyThread(socket,sb.toString());                         socketServerReplyThread.run();                     } catch (IOException e) {                         e.printStackTrace();     }}}}};  }