android - can we pass real time data of ble4.0 to next activity -

i trying use ble 4.0 data 1 activity other it's not working me because real time data.

 private void displaydata(string data) {         if (data != null) {       mdatafield.settext(data);     }  } 

i want use data next activity creating graphview

   @override public void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.main3);     d1=(textview) findviewbyid(r.id.datavalue);     intent intent = getintent();     string  data1 = intent.getstringextra("data");       displaydata(data1);     //intent gattserviceintent = new intent(this, rblservice.class);     //bindservice(gattserviceintent, mserviceconnection, bind_auto_create);     line.clear(); } 

instead of passing data between activities, have 1 activity, displaying several fragments:

• here google doc - building dynamic ui fragments
• and nice 3rd party book - creating dynamic ui android fragments.

then put ble managing source code 1 , activity.

here example of such class (make activity implement bleobject.blelistener , instantiate bleobject in mbleobject = new bleobject(this, this)):

public class bleobject {     private context mcontext;     private blelistener mlistener;      private handler mrssireader;     private handler mrssiwatchdog;      private bluetoothadapter mbluetoothadapter;     private bluetoothgatt mbluetoothgatt;      // let activity implement interface (and manage fragments)     public interface blelistener {         public void devicefound(bluetoothdevice device, int rssi);         public void updaterssi(bluetoothdevice device, int rssi);         // add more callbacks here, example discovered services     }      public bleobject(context context, blelistener listener) {         mcontext = context;         mlistener = listener;          mrssireader = new handler();         mrssiwatchdog = new handler();     }      // method should called before using bleobject     public boolean checkhardware() {         bluetoothmanager bluetoothmanager = (bluetoothmanager) mcontext.getsystemservice(context.bluetooth_service);         mbluetoothadapter = bluetoothmanager.getadapter();         if (mbluetoothadapter == null)             return false;          return mcontext.getpackagemanager().hassystemfeature(packagemanager.feature_bluetooth_le);     }          public boolean isenabled() {         return mbluetoothadapter.isenabled();     }      private bluetoothadapter.lescancallback mscancallback = new bluetoothadapter.lescancallback() {         @override             public void onlescan(final bluetoothdevice device, final int rssi, byte[] scanrecord) {                 if (device == null)                     return;                  string address = device.getaddress();                  if (!bluetoothadapter.checkbluetoothaddress(address))                     return;                  mlistener.devicefound(device, rssi);             }     };      private final bluetoothgattcallback mgattcallback = new bluetoothgattcallback() {         @override         public void onconnectionstatechange(bluetoothgatt gatt, int status, int newstate) {             if (newstate == bluetoothprofile.state_connected) {                 readperiodicalyrssi();             } else if (newstate == bluetoothprofile.state_disconnected) {                 disconnect();             }         }          @override         public void onreadremoterssi(bluetoothgatt gatt, int rssi, int status) {             if (gatt == null)                 return;              bluetoothdevice device = gatt.getdevice();             if (device == null)                 return;              if (status == bluetoothgatt.gatt_success) {                 mlistener.updaterssi(device, rssi);             }         }     };      private runnable mwatchdogrunnable = new runnable() {          @override         public void run() {             mgattcallback.onreadremoterssi(mbluetoothgatt, -666, bluetoothgatt.gatt_success);         }     };      private runnable mrssirunnable = new runnable() {          @override         public void run() {             if (mbluetoothgatt == null)                 return;              mbluetoothgatt.readremoterssi();             readperiodicalyrssi();         }     };      private void readperiodicalyrssi() {         mrssireader.postdelayed(mrssirunnable, 1000);          mrssiwatchdog.removecallbacks(mwatchdogrunnable);         mrssiwatchdog.postdelayed(mwatchdogrunnable, 10000);     }          @suppresswarnings("deprecation")     public void startscanning() {         mbluetoothadapter.startlescan(mscancallback);     }      @suppresswarnings("deprecation")     public void stopscanning() {         mbluetoothadapter.stoplescan(mscancallback);     }      public void connect(string address) {         connect(mbluetoothadapter.getremotedevice(address));     }      public void connect(final bluetoothdevice device) {         handler handler = new handler();         handler.post(new runnable() {             @override             public void run() {                 mbluetoothgatt = device.connectgatt(mcontext, true, mgattcallback);             }         });     }      public void disconnect() {          try {             mbluetoothgatt.disconnect();         } catch (exception e) {         }          try {             mbluetoothgatt.close();         } catch (exception e) {         }          mbluetoothgatt = null;     } }