哪個Android API問題掃描請求和響應

Question

是Android gat connect還是Android掃描（getBluetoothLeScanner），它會導致掃描請求和響應？ 如果我們知道BLE設備地址，我們是否可以直接連接到BLE設備地址而無需發現服務？

Answer 1

在Android的BLE掃描，對掃描請求將在你所希望的方式返回，例如

List<ScanFilter> filters = new ArrayList<ScanFilter>(); 

ScanFilter filter = new ScanFilter.Builder() 
     .setServiceUuid(uuid) 
     .setDeviceAddress(address) 
     .setDeviceName(name) 
     .build(); 
filters.add(filter); 

和掃描響應的結果將返回在

onScanResult（INT callbackType，ScanResult結果）

ScanCallBack mCallback = new ScanCallback() { 
     @Override 
     public void onScanResult(int callbackType, ScanResult result) { 
      super.onScanResult(callbackType, result); 
      if (result != null){ 
       BluetoothDevice device = result.getDevice(); 
       mDeviceList.add(device); 
       removeDuplicateWithOrder(mDeviceList); 
       adapter.notifyDataSetChanged(); 
      } 
     } 

     @Override 
     public void onBatchScanResults(List<ScanResult> results) { 
      super.onBatchScanResults(results); 
     } 

     @Override 
     public void onScanFailed(int errorCode) { 
      super.onScanFailed(errorCode); 
      Log.e("TAG", "Scan failed " + errorCode); 
     } 
    }; 

如果我們知道BLE設備地址，我們可以直接連接到BLE設備地址而無需發現服務？

答案是YES 和你可以按照這個例子

public boolean connect(final String address) { 
    if (mBluetoothAdapter == null || address == null) { 
     Log.w(TAG, "BluetoothAdapter not initialized or unspecified address."); 
     return false; 
    } 

    // Previously connected device. Try to reconnect. 
    if (mBluetoothDeviceAddress != null && address.equals(mBluetoothDeviceAddress) 
      && mBluetoothGatt != null) { 
     Log.d(TAG, "Trying to use an existing mBluetoothGatt for connection."); 
     if (mBluetoothGatt.connect()) { 
      return true; 
     } else { 
      return false; 
     } 
    } 

    final BluetoothDevice device = mBluetoothAdapter.getRemoteDevice(address); 
    if (device == null) { 
     Log.w(TAG, "Device not found. Unable to connect."); 
     return false; 
    } 
    // We want to directly connect to the device, so we are setting the autoConnect 
    // parameter to false. 
    mBluetoothGatt = device.connectGatt(this, false, mGattCallback); 
    Log.d(TAG, "Trying to create a new connection."); 
    mBluetoothDeviceAddress = address; 
    return true; 
} 

希望這可以幫助。