556. (Android/Java) [유틸 파일] observablebluetoothPairingScanList : 블루투스 페어링 목록 스캔 결과 반환

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[개발 환경 설정]

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개발 툴 : AndroidStudio

개발 언어 : Java

 

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[소스 코드]

 

    // -----------------------------------------------------------------------------------------
    // TODO [SEARCH FAST] : [Observable] : [블루투스 페어링 목록 스캔 결과 반환]
    // -----------------------------------------------------------------------------------------
    // TODO [호출 방법 소스 코드]
    // -----------------------------------------------------------------------------------------
    /*
    try {

        C_App.observablebluetoothPairingScanList(A_Intro.this)
                .subscribeOn(AndroidSchedulers.mainThread()) // [Observable (생성자) 로직을 IO 스레드에서 실행 : 백그라운드]
                .observeOn(Schedulers.io()) // [Observer (관찰자) 로직을 메인 스레드에서 실행]
                .subscribe(new Observer<List<BluetoothDevice>>() { // [Observable.create 타입 지정]
                    @Override
                    public void onSubscribe(@NonNull Disposable d) {
                    }
                    @Override
                    public void onNext(@NonNull List<BluetoothDevice> value) {
                        S_Log.ltw("================================================");
                        S_Log.cnt("["+ACTIVITY_NAME+" >> BLE PAIRED SCAN RESULT :: onNext]");
                        S_Log.cnt("-----------------------------------------");
                        S_Log.cnt("[SCAN COUNT :: "+String.valueOf(value.size())+"]");
                        S_Log.cnt("-----------------------------------------");
                        S_Log.cnt("[SCAN LIST :: "+String.valueOf(value.toString())+"]");
                        S_Log.lbw("================================================");
                    }
                    @Override
                    public void onError(@NonNull Throwable e) {
                        S_Log.lte("================================================");
                        S_Log.cnt("["+ACTIVITY_NAME+" >> BLE PAIRED SCAN RESULT :: onError]");
                        S_Log.cnt("-----------------------------------------");
                        S_Log.cnt("[ERROR :: "+String.valueOf(e.getMessage())+"]");
                        S_Log.lbe("================================================");
                    }
                    @Override
                    public void onComplete() {
                    }
                });

    } catch (Exception e) {
        e.printStackTrace();
    }
    */
    // -----------------------------------------------------------------------------------------
    static BluetoothAdapter ble_Adapter;
    static int ble_Bonded_COUNT = 0;
    static String ble_M_LOG = "";
    static ArrayList ble_Paired_List = null;
    public static Observable<ArrayList> observablebluetoothPairingScanList(Context mContext) {

        // [로직 처리 실시]
        return Observable.create(subscriber -> {

            // [변수 초기화]
            ble_Adapter = null;
            ble_Bonded_COUNT = 0;
            ble_M_LOG = "";
            ble_Paired_List = null;

            try {
                // ===============================================================
                S_Log._D_("블루투스 페어링 목록 리스트 스캔 시작", null);
                // ===============================================================

                new Handler(Looper.getMainLooper()).postDelayed(new Runnable() {
                    @Override
                    public void run() {

                        // [퍼미션 권한 체크 실시]
                        if (ActivityCompat.checkSelfPermission(mContext, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED
                                || ActivityCompat.checkSelfPermission(mContext, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED
                                || ActivityCompat.checkSelfPermission(mContext, Manifest.permission.BLUETOOTH_SCAN) != PackageManager.PERMISSION_GRANTED) {

                            // [퍼미션이 부여되어있지 않은 경우 종료]
                            ble_M_LOG = "[ERROR] : [observablebluetoothPairingScanList] : Bluetooth Pairing Scan Permission not Granted (블루투스 페어링 목록 스캔에 필요한 권한을 확인해주세요.)";

                            // ===============================================================
                            S_Log._E_("ERROR", new String[]{
                                    "ERROR :: " + String.valueOf(ble_M_LOG)
                            });
                            // ===============================================================

                            // [리턴 반환 실시]
                            subscriber.onError(new Throwable(ble_M_LOG));
                            subscriber.onComplete();

                        } else {

                            // ---------------------------------------------------------------

                            // [블루투스 페어링 목록 리스트 스캔 실시]
                            BluetoothManager bluetoothManager = (BluetoothManager) mContext.getSystemService(Context.BLUETOOTH_SERVICE);
                            ble_Adapter = bluetoothManager.getAdapter();
                            Set<BluetoothDevice> pairedDevices = ble_Adapter.getBondedDevices();

                            // ---------------------------------------------------------------

                            if (pairedDevices != null && pairedDevices.size()>0){ // [스캔 된 목록이 있는 경우]
                                ble_Bonded_COUNT = pairedDevices.size();
                                ble_Paired_List = new ArrayList<>();
                                for (BluetoothDevice device : pairedDevices) {

                                    //TODO [JSON 형식으로 포맷 실시]
                                    Map map = new HashMap();
                                    try {
                                        map.put("name", String.valueOf(device.getName()));
                                        map.put("address", String.valueOf(device.getAddress()));
                                        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
                                            map.put("alias", String.valueOf(device.getAlias()));
                                        }
                                        map.put("uuid", String.valueOf(Arrays.toString(device.getUuids())).replaceAll("\\[", "").replaceAll("\\]", ""));
                                        map.put("state", String.valueOf(device.getBondState()));
                                        map.put("type", String.valueOf(device.getType()));
                                    } catch (Exception e) {
                                        e.printStackTrace();
                                    }

                                    ble_Paired_List.add(map);
                                }

                            }
                            else {
                                ble_Bonded_COUNT = 0;
                                ble_Paired_List = new ArrayList<>();
                            }

                            // ---------------------------------------------------------------

                            // [로그 출력]
                            // ===============================================================
                            S_Log._W_("SUCCESS", new String[]{
                                    "SCAN COUNT :: " + String.valueOf(ble_Bonded_COUNT),
                                    "SCAN LIST :: " + String.valueOf(new Gson().newBuilder().setPrettyPrinting().create().toJson(ble_Paired_List))
                            });
                            // ===============================================================

                            // ---------------------------------------------------------------

                            // [리턴 반환 실시]
                            subscriber.onNext(ble_Paired_List);
                            subscriber.onComplete();

                            // ---------------------------------------------------------------

                        }

                    }
                }, 0);

            } catch (final Exception e){
                e.printStackTrace();
                // ===============================================================
                S_Log._E_("EXCEPTION", new String[]{
                        "EXCEPTION :: " + String.valueOf(e.getMessage())
                });
                // ===============================================================

                // ------------------------------------------------------
                // TODO [리턴 데이터 반환]
                // ------------------------------------------------------
                try {
                    // [에러 메시지 삽입]
                    ble_M_LOG = "[EXCEPTION] : [observablebluetoothPairingScanList] : " + String.valueOf(e.getMessage());

                    // [리턴 반환 실시]
                    subscriber.onError(new Throwable(ble_M_LOG));
                    subscriber.onComplete();
                }
                catch (Exception ex){
                    ex.printStackTrace();
                }
            }

        });
    }

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