Bluetooth principle Android Code Implementation _android

This example for you to share the Android Bluetooth principle code, for your reference, the specific contents are as follows

Package Com.example.se7en.testbluetooth;
Import android.app.Activity;
Import Android.bluetooth.BluetoothAdapter;
Import Android.bluetooth.BluetoothDevice;
Import Android.bluetooth.BluetoothServerSocket;
Import Android.bluetooth.BluetoothSocket;
Import Android.content.BroadcastReceiver;
Import Android.content.Context;
Import android.content.Intent;
Import Android.content.IntentFilter;
Import Android.os.Bundle;
Import Android.util.Log;
Import Android.view.View;
Import Android.widget.AdapterView;
Import Android.widget.EditText;
Import Android.widget.ListView;

Import Android.widget.Toast;
Import java.io.IOException;
Import java.util.ArrayList;
Import java.util.List;

Import Java.util.UUID;

  public class Mainactivity extends activity {private Bluetoothadapter adapter;

  Private Myreceiver receiver;

  Private ListView Mlistview;

  Private list<bluetoothdevice> mdevices;

  Private Com.example.se7en.testbluetooth.DeviceAdapter Mdeviceadapter; Private Bluetoothsocket Msocket;

  Private EditText et;
    @Override protected void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate);
    Setcontentview (R.layout.activity_main);
    Mlistview = (ListView) Findviewbyid (r.id.lv);
    ET = (edittext) Findviewbyid (r.id.et);
    adapter = Bluetoothadapter.getdefaultadapter ();
    Bluetoothhandler.getinstance (). SetContext (this);
  Init ();
    private void Init () {Initlistview ();
      Determine if Bluetooth is supported if (adapter = null) {Toast.maketext (this, "the phone does not support Bluetooth", Toast.length_long). Show ();
    Return
      //Determine if Bluetooth features open if (!adapter.isenabled ()) {//forcibly open//adapter.enable ();
      Intent intent=new Intent (bluetoothadapter.action_request_enable);
    StartActivity (Intent);
    } intentfilter filter = new Intentfilter ();
    Registers a scanning start broadcast filter.addaction (bluetoothadapter.action_discovery_started);
    Registering the scan end of the broadcast filter.addaction (bluetoothadapter.action_discovery_finished); Register sweepTrace has found the device's broadcast filter.addaction (Bluetoothdevice.action_found);
    Receiver = new Myreceiver ();
    Registerreceiver (receiver, filter);
  Startblueserver (); /** * Start bluetooth service * * private void Startblueserver () {new Thread () {@Override public void R Un () {while (true) {try {bluetoothserversocket serversocket = Ada Pter. Listenusingrfcommwithservicerecord ("Bluetooth Service", uuid.fromstring (
            "997f1b20-b4a0-45ea-a7dd-b2097299b1f6"));
          Msocket = Serversocket.accept ();//Blocking Bluetoothhandler.getinstance (). Setsocket (Msocket);
          catch (IOException e) {e.printstacktrace ();
  }}}.start ();
        public void DoClick (view view) {switch (View.getid ()) {case r.id.btn:mdevices.clear ();
        Mdeviceadapter.notifydatasetchanged (); Determine whether you areScan if it's not scanning then start scanning if (!adapter.isdiscovering () && adapter.startdiscovery ()) {Toast.maket
        Ext (This, "Start scanning around Bluetooth devices", Toast.length_long). Show ();
      } break; Case R.id.send:if ("". Equals (Et.gettext (). toString ())} {Toast.maketext (this, "content cannot be empty", TOAST.L
          Ength_short). Show ();
        Return } if (Bluetoothhandler.getinstance (). Getsocket () = null) {Toast.maketext (this, "Device not Connected", Toast .
          Length_short). Show ();
        Return New Thread () {@Override public void run () {Bluetoothhandler.
          GetInstance (). SendMessage (Et.gettext (). toString ());
        }}.start ();
      Break
        Case R.id.dis:bluetoothhandler.getinstance (). closesocket ();
    Break
    }} @Override protected void OnDestroy () {Super.ondestroy ();
  if (receiver!= null) {    Cancellation of Broadcast unregisterreceiver (receiver);
    } private void Initlistview () {mdevices = new arraylist<bluetoothdevice> ();
    Mdeviceadapter = new Com.example.se7en.testbluetooth.DeviceAdapter (this, mdevices);
    Mlistview.setadapter (Mdeviceadapter); Mlistview.setonitemclicklistener (New Adapterview.onitemclicklistener () {@Override public void Onitemclick
      (adapterview<?> parent, view view, int position, long ID) {try {msocket = mdevices. Get (position). Createrfcommsockettoservi
          Cerecord (uuid.fromstring ("997f1b20-b4a0-45ea-a7dd-b2097299b1f6"));
          Msocket.connect ()//Blocking Toast.maketext (mainactivity.this, "Connection succeeded", Toast.length_short). Show ();
        Bluetoothhandler.getinstance (). Setsocket (Msocket);
        catch (IOException e) {e.printstacktrace ();
  }

      }
    }); } publiC Class Myreceiver extends Broadcastreceiver {@Override public void onreceive (context, Intent Intent)
      {String action = intent.getaction ();
      if (Action.equals (bluetoothadapter.action_discovery_started)) {log.i ("info", "start scanning");
      else if (action.equals (bluetoothadapter.action_discovery_finished)) {log.i ("info", "scan End");
            else if (action.equals (Bluetoothdevice.action_found)) {Bluetoothdevice device = intent
        . Getparcelableextra (Bluetoothdevice.extra_device);
        LOG.I ("Info", Device.getname () + ":" + device.getaddress ()); if (mdevices!= null) {for (int i = 0; i < mdevices.size (); i++) {if device.
            GetAddress (). Equals (Mdevices.get (i). GetAddress ())) {return;
          } mdevices.add (device);
        Mdeviceadapter.notifydatasetchanged ();
   }   }
    }

  }
}


 

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