Ndtyjky

I've been trying to develop an app which I could integrate with a RFID reader (I'm using a 1128 UHF RFID Reader). I've recently trying to learn how to use Bluetooth in android studio, i have create a simple app where I could turn on Bluetooth, find devices and pair with them. But I couldn't pair with the RFID reader. I'm new to android programming so I'm not sure how to do it properly.

Here is my code :

package com.siscaproject.sisca.Activity;



import android.bluetooth.BluetoothAdapter;

import android.bluetooth.BluetoothDevice;

import android.content.BroadcastReceiver;

import android.content.Context;

import android.content.Intent;

import android.content.IntentFilter;

import android.os.Handler;

import android.support.v4.widget.SwipeRefreshLayout;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.support.v7.widget.LinearLayoutManager;

import android.support.v7.widget.RecyclerView;

import android.support.v7.widget.SwitchCompat;

import android.util.Log;

import android.view.View;

import android.widget.TextView;



import com.siscaproject.sisca.Adapter.BluetoothListAdapter;

import com.siscaproject.sisca.R;



import java.util.ArrayList;



import butterknife.BindView;

import butterknife.ButterKnife;

import butterknife.OnCheckedChanged;



public class HomeActivity extends AppCompatActivity{



    private static final String TAG = "HomeActivity";



    private BluetoothAdapter mBluetoothAdapter;



    private BroadcastReceiver mBroadcastReceiver1 = new BroadcastReceiver() {

        @Override

        public void onReceive(Context context, Intent intent) {

            String action = intent.getAction();

            if(action.equals(mBluetoothAdapter.ACTION_STATE_CHANGED)){

                final int state = intent.getIntExtra(BluetoothAdapter.EXTRA_STATE, mBluetoothAdapter.ERROR);

                switch(state){

                    case BluetoothAdapter.STATE_OFF:

                        Log.d(TAG, "onReceive: STATE OFF");

                        break;

                    case BluetoothAdapter.STATE_TURNING_OFF:

                        Log.d(TAG, "onReceive: STATE TURNING OFF");

                        break;

                    case BluetoothAdapter.STATE_ON:

                        Log.d(TAG, "onReceive: STATE ON");

                        break;

                    case BluetoothAdapter.STATE_TURNING_ON:

                        Log.d(TAG, "onReceive: STATE TURNING ON");

                        break;

                }

            }

        }

    };



    private BroadcastReceiver mBroadcastReceiver2 = new BroadcastReceiver() {

        @Override

        public void onReceive(Context context, Intent intent) {

            final String action = intent.getAction();

            Log.d(TAG, "onReceive: ACTION FOUND");



            if(action.equals(BluetoothDevice.ACTION_FOUND)){

                BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);

                // Yang dimasukin ke arraylist cuma BluetoothClass 1f00

                if(device.getBluetoothClass().toString().equals("1f00")){

                    listDevice.add(device);

                }



                Log.d(TAG, "onReceive: " + device.getName() + ", " + device.getAddress());



                rv_list_device.setHasFixedSize(true);

                rv_list_device.setLayoutManager(new LinearLayoutManager(getApplicationContext()));



                BluetoothListAdapter listAdapter = new BluetoothListAdapter(listDevice,

                        HomeActivity.this, mBluetoothAdapter);

                rv_list_device.setAdapter(listAdapter);

            }

        }

    };



    private BroadcastReceiver mBroadcastReceiver3 = new BroadcastReceiver() {

        @Override

        public void onReceive(Context context, Intent intent) {

            final String action = intent.getAction();



            if(action.equals(BluetoothDevice.ACTION_BOND_STATE_CHANGED)){

                BluetoothDevice mDevice = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);



                if(mDevice.getBondState() == BluetoothDevice.BOND_BONDED){

                    Log.d(TAG, "BroadcastReceiver: BOND BONDED");

                }

                else if(mDevice.getBondState() == BluetoothDevice.BOND_BONDING){

                    Log.d(TAG, "BroadcastReceiver: BOND BONDING");

                }

                else if(mDevice.getBondState() == BluetoothDevice.BOND_NONE){

                    Log.d(TAG, "BroadcastReceiver: BOND NONE");

                }

            }

        }

    };



    @BindView(R.id.sw_bluetooth) SwitchCompat sw_bluetooth;



    @BindView(R.id.rv_list_device) RecyclerView rv_list_device;

    @BindView(R.id.srl_list_parent) SwipeRefreshLayout srl_list_parent;



    @BindView(R.id.tv_btWarning) TextView tv_btWarning;



    private BluetoothListAdapter rvAdapter;

    private ArrayList<BluetoothDevice> listDevice;







    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_home);



        ButterKnife.bind(this);



        rv_list_device.setHasFixedSize(true);

        rv_list_device.setLayoutManager(new LinearLayoutManager(this));



        rvAdapter = new BluetoothListAdapter(listDevice, HomeActivity.this, mBluetoothAdapter);

        rv_list_device.setAdapter(rvAdapter);



        IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_BOND_STATE_CHANGED);

        registerReceiver(mBroadcastReceiver3, filter);



        listDevice = new ArrayList<>();



        srl_list_parent.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {

            @Override

            public void onRefresh() {

                refreshDevice();

                new Handler().postDelayed(new Runnable() {

                    @Override

                    public void run() {

                        srl_list_parent.setRefreshing(false);

                        mBluetoothAdapter.cancelDiscovery();

                        Log.d(TAG, "onRefresh: Canceling discovery");

                    }

                }, 20000);

            }

        });





        mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();

        initialSwitch();

    }



    private void initialSwitch(){

        if(mBluetoothAdapter.isEnabled()){

            sw_bluetooth.setChecked(true);

            srl_list_parent.setVisibility(View.VISIBLE);

            tv_btWarning.setVisibility(View.GONE);

        }else if(!mBluetoothAdapter.isEnabled()){

            sw_bluetooth.setChecked(false);

            srl_list_parent.setVisibility(View.GONE);

            tv_btWarning.setVisibility(View.VISIBLE);

        }

    }



    public void refreshDevice(){

        listDevice.clear();



        Log.d(TAG, "refreshDevice: Looking for unpaired devices");



        if(mBluetoothAdapter.isDiscovering()){

            mBluetoothAdapter.cancelDiscovery();

            Log.d(TAG, "refreshDevice: Canceling discovery");



            mBluetoothAdapter.startDiscovery();

            IntentFilter discoverDevicesIntent = new IntentFilter(BluetoothDevice.ACTION_FOUND);

            registerReceiver(mBroadcastReceiver2, discoverDevicesIntent);

        }

        else if(!mBluetoothAdapter.isDiscovering()){

            mBluetoothAdapter.startDiscovery();

            IntentFilter discoverDevicesIntent = new IntentFilter(BluetoothDevice.ACTION_FOUND);

            registerReceiver(mBroadcastReceiver2, discoverDevicesIntent);

        }



    }



    @Override

    protected void onDestroy() {

        Log.d(TAG, "onDestroy: called");

        super.onDestroy();



        try {

            if(mBroadcastReceiver1 != null){

                unregisterReceiver(mBroadcastReceiver1);

                mBroadcastReceiver1 = null;

            }

        }catch(RuntimeException e){

            Log.e(TAG, e.getMessage());

        }



        try {

            if(mBroadcastReceiver2 != null){

                unregisterReceiver(mBroadcastReceiver2);

                mBroadcastReceiver2 = null;

            }

        }catch(RuntimeException e){

            Log.e(TAG, e.getMessage());

        }



        try {

            if(mBroadcastReceiver3 != null){

                unregisterReceiver(mBroadcastReceiver3);

                mBroadcastReceiver3 = null;

            }

        }catch(RuntimeException e){

            Log.e(TAG, e.getMessage());

        }



        finish();

    }



    @OnCheckedChanged({R.id.sw_bluetooth})

    public void onSwitch(){

        Log.d(TAG, "onSwitch: enabling/disabling bluetooth");



        if(sw_bluetooth.isChecked() == true){

            Log.d(TAG, "enableDisableBluetooth: enabling bluetooth");

            srl_list_parent.setVisibility(View.VISIBLE);

            tv_btWarning.setVisibility(View.GONE);

            mBluetoothAdapter.enable();



            IntentFilter BTIntent = new IntentFilter(BluetoothAdapter.ACTION_STATE_CHANGED);

            registerReceiver(mBroadcastReceiver1, BTIntent);

        }

        else if(sw_bluetooth.isChecked() == false){

            Log.d(TAG, "enableDisableBluetooth: disabling bluetooth");

            mBluetoothAdapter.disable();

            srl_list_parent.setVisibility(View.GONE);

            tv_btWarning.setVisibility(View.VISIBLE);

            listDevice.clear();



            IntentFilter BTIntent = new IntentFilter(BluetoothAdapter.ACTION_STATE_CHANGED);

            registerReceiver(mBroadcastReceiver1, BTIntent);

        }

        else if(mBluetoothAdapter == null){

            Log.d(TAG, "enableDisableBluetooth: Doesn't have BT capabilities");

        }

    }



}

I could find my RFID reader device (it shows on the list), but I couldn't pair it. I've searched on how to do this but can't seem to find how to do it.