Java BluetoothLeScanner.startScan方法代碼示例

import android.bluetooth.le.BluetoothLeScanner; //導入方法依賴的package包/類
protected static void scanDevice(BluetoothAdapter bluetoothAdapter, U2FBLEDeviceNotification notification, Logger logger, Context context, String data, ScanType scanType) {
	BluetoothLeScanner bluetoothScanner = bluetoothAdapter.getBluetoothLeScanner();
	ScanFilter.Builder builder = new ScanFilter.Builder();
	switch(scanType) {
		case SCAN_BY_NAME:
			builder.setDeviceName(data);
			break;
	}
	Vector<ScanFilter> filter = new Vector<ScanFilter>();
	filter.add(builder.build());
	ScanSettings.Builder builderScanSettings = new ScanSettings.Builder();
	builderScanSettings.setScanMode(ScanSettings.SCAN_MODE_BALANCED);
	builderScanSettings.setReportDelay(0);
	LocalScanCallback scannerCallback = new LocalScanCallback(bluetoothAdapter, logger, notification, context);
	bluetoothScanner.startScan(filter, builderScanSettings.build(), scannerCallback);		
}
 

import android.bluetooth.le.BluetoothLeScanner; //導入方法依賴的package包/類
public static void startScan(ScanCallback callback) {
    BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter();
    if (null == adapter) {
        Log.e(TAG, "BluetoothAdapter is null");
        return;
    }
    BluetoothLeScanner scanner = adapter.getBluetoothLeScanner();
    if (null == scanner) {
        Log.e(TAG, "BluetoothLeScanner is null");
        return;
    }
    scanner.startScan(callback);
}
 

import android.bluetooth.le.BluetoothLeScanner; //導入方法依賴的package包/類
@Override
@RequiresPermission(allOf = {Manifest.permission.BLUETOOTH_ADMIN,Manifest.permission.BLUETOOTH})
public void startScan(@NonNull ScanCallback callback) {
    ScannerUtils.throwOnAdaptorNotEnabled(bluetoothAdapter);
    final BluetoothLeScanner nativeScanner = getNativeScannerOrThrow();

    throwIfCallbackInUse(callback);

    ScanCallbackHolder holder = new ScanCallbackHolder(callback);
    callbackHolderMap.put(callback,holder);

    nativeScanner.startScan(holder.getNativeCallback());
}
 

import android.bluetooth.le.BluetoothLeScanner; //導入方法依賴的package包/類
@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
private void startListeningBluetoothMeasurements(List<ScanFilter> scanFilters,
                                                 ScanSettings scanSettings,
                                                 ScanCallback scanCallback){
    BluetoothLeScanner scanner = bluetoothManager.getAdapter().getBluetoothLeScanner();
    scanner.startScan(scanFilters, scanSettings, scanCallback);
}
 

import android.bluetooth.le.BluetoothLeScanner; //導入方法依賴的package包/類
private void startScan() {
	BluetoothLeScanner bluetoothScanner = bluetoothAdapter.getBluetoothLeScanner();
	ScanFilter.Builder builder = new ScanFilter.Builder();		
	Vector<ScanFilter> filter = new Vector<ScanFilter>();
	filter.add(builder.build());
	ScanSettings.Builder builderScanSettings = new ScanSettings.Builder();		
	builderScanSettings.setScanMode(ScanSettings.SCAN_MODE_LOW_LATENCY);
	builderScanSettings.setReportDelay(0);
	bluetoothScanner.startScan(filter, builderScanSettings.build(), leScanCallback);
}
 

import android.bluetooth.le.BluetoothLeScanner; //導入方法依賴的package包/類
@Override
@RequiresPermission(allOf = {Manifest.permission.BLUETOOTH_ADMIN, Manifest.permission.BLUETOOTH})
/* package */ void startScanInternal(final List<ScanFilter> filters, final ScanSettings settings, final ScanCallback callback) {
	BluetoothLeUtils.checkAdapterStateOn(mBluetoothAdapter);
	offloadedFilteringSupported = mBluetoothAdapter.isOffloadedFilteringSupported();

	if (mWrappers.containsKey(callback)) {
		throw new IllegalArgumentException("scanner already started with given callback");
	}

	final BluetoothLeScanner scanner = mBluetoothAdapter.getBluetoothLeScanner();
	if (scanner == null)
		throw new IllegalStateException("BT le scanner not available");

	final ScanCallbackWrapper wrapper = new ScanCallbackWrapper(filters, settings, callback);
	final ScanCallbackImpl _callback = new ScanCallbackImpl();
	final android.bluetooth.le.ScanSettings _settings = toImpl(mBluetoothAdapter, settings);
	List<android.bluetooth.le.ScanFilter> _filters = null;
	if (filters != null && mBluetoothAdapter.isOffloadedFilteringSupported() && settings.getUseHardwareFilteringIfSupported())
		_filters = toImpl(filters);

	mWrappers.put(callback, wrapper);
	mCallbacks.put(callback, _callback);
	mWrappers2.put(_callback, wrapper);

	scanner.startScan(_filters, _settings, _callback);
}
 

import android.bluetooth.le.BluetoothLeScanner; //導入方法依賴的package包/類
public void scanPeripheralWithServicesUUID_API21(final String uuid) {
    	if (mBluetoothAdapter == null || !mBluetoothAdapter.isEnabled()) {
    		requestOpenBT();
    		return;
    	}
    	BluetoothLeScanner scanner = mBluetoothAdapter.getBluetoothLeScanner();
    	ScanSettings settings = new ScanSettings.Builder().setScanMode(ScanSettings.SCAN_MODE_LOW_LATENCY).build();
    	List<ScanFilter> list = new ArrayList<ScanFilter>(1);
    	
    	ScanCallback callback = new ScanCallback() {
			@Override
		    public void onScanResult(int callbackType,  android.bluetooth.le.ScanResult result) {
				BluetoothDevice device = result.getDevice();
				
				ScanRecord sr = result.getScanRecord();
			    
				int rssi = result.getRssi();
//				if (rssi > -15) {
//					runCallbackWithErrorCode(BLEUtilErrorCode.E_RSSI_ERROR);
//					return;
//				}
//				if (rssi < -35) {
//					runCallbackWithErrorCode(BLEUtilErrorCode.E_RSSI_TOO_LOW);
//					return;
//				}
				if (matchRules(rssi, sr.getBytes(), uuid)) {
					connectToDevice(device);
				}
		    }
		 
		    @Override
		    public void onScanFailed(int errorCode) {
		 
		    }
		};
    	
    	if (uuid != null) {
	    	ScanFilter filter = new ScanFilter.Builder().setServiceUuid(ParcelUuid.fromString(uuid)).build();
	        list.add(filter);
	        scanner.startScan(list, settings, callback);
    	} else {
//    		scanner.startScan(null, settings, callback);
    		scanner.startScan(callback);
    	}
    }
 

import android.bluetooth.le.BluetoothLeScanner; //導入方法依賴的package包/類
/**
 * Starts a BLE Scan. Discovered devices are reported via the delivered callback.
 *
 * @param callback                    An instance of the BleScanCallback, used to receive scan results.
 * @param durationMs                  The duration in milliseconds, how long the scan should last. This parameter
 *                                    must be greater or equal to 1000 ms.
 * @param deviceNameFilter            A array of device names to filter for. Only BLE devices with these
 *                                    names are reported to the callback.
 * @param advertisedServiceUuidFilter An Array of advertised service UUIDs to also deliver results for.
 * @return true if a scan was triggered and false, if it was not possible to trigger a scan or
 * if there is already an ongoing scan running.
 */
public boolean startScan(@NonNull final BleScanCallback callback, final long durationMs,
                         final String[] deviceNameFilter, final String[] advertisedServiceUuidFilter) {
    if (mBluetoothAdapter == null) {
        Log.w(TAG, "BluetoothAdapter not initialized or unspecified address.");
        return false;
    }

    if (durationMs < MIN_SCAN_DURATION_MS) {
        Log.w(TAG, "The scan duration must be longer than 1 second");
        return false;
    }

    if (mStopScanningRunnable != null) {
        Log.w(TAG, "Already a scan running");
        return false;
    }

    final BluetoothLeScanner bluetoothLeScanner = mBluetoothAdapter.getBluetoothLeScanner();
    if (bluetoothLeScanner == null) {
        Log.w(TAG, "Failed to scan. Bluetooth appears to be unavailable");
        return false;
    }
    final ScanSettings settings = new ScanSettings.Builder()
            .setScanMode(ScanSettings.SCAN_MODE_LOW_LATENCY)
            .build();

    final List<ScanFilter> filters = getScanFilters(deviceNameFilter, advertisedServiceUuidFilter);

    // Stops scanning after a pre-defined scan period.
    mStopScanningRunnable = new Runnable() {
        @Override
        public void run() {
            stopScan(callback);
        }
    };
    mScanHandler.postDelayed(mStopScanningRunnable, durationMs);

    bluetoothLeScanner.startScan(filters, settings, callback);
    return true;
}