BLEデータをtextViewに表示

Question

私は、BluetoothLeGattのサンプルコードを使用して、アプリケーションの起動時にボンディングされたBLE周辺機器に自動的に接続するアプリケーションを作成しました。今私は、周辺機器の特性の1つからのデータをtextViewに表示しようとしています。 BluetoothLeGattのサンプルコードでは、ExpandableListView.OnChildClickListenerを使用してこれを実証するだけです。私のアプリはユーザー入力を必要とせず、単に特性からデータを取得する必要があります。これは私が今までに持っているものです：

private TextView mConnectionState; 
private TextView mDataField; 
private String mDeviceName; 
private String mDeviceAddress; 
private ExpandableListView mGattServicesList; 
private BluetoothLeService mBluetoothLeService; 
private boolean mConnected = false; 
private BluetoothGattCharacteristic mNotifyCharacteristic; 

private final String LIST_NAME = "NAME"; 
private final String LIST_UUID = "UUID"; 

// Code to manage Service lifecycle. 
private final ServiceConnection mServiceConnection = new ServiceConnection() { 

    @Override 
    public void onServiceConnected(ComponentName componentName, IBinder service) { 
     mBluetoothLeService = ((BluetoothLeService.LocalBinder) service).getService(); 
     if (!mBluetoothLeService.initialize()) { 
      Log.e(TAG, "Unable to initialize Bluetooth"); 
      finish(); 
     } 
     // Automatically connects to the device upon successful start-up initialization. 
     mBluetoothLeService.connect(mDeviceAddress); 
    } 

    @Override 
    public void onServiceDisconnected(ComponentName componentName) { 
     mBluetoothLeService = null; 
    } 
}; 

// Handles various events fired by the Service. 
// ACTION_GATT_CONNECTED: connected to a GATT server. 
// ACTION_GATT_DISCONNECTED: disconnected from a GATT server. 
// ACTION_GATT_SERVICES_DISCOVERED: discovered GATT services. 
// ACTION_DATA_AVAILABLE: received data from the device. This can be a result of read 
//      or notification operations. 
private final BroadcastReceiver mGattUpdateReceiver = new BroadcastReceiver() { 
    @Override 
    public void onReceive(Context context, Intent intent) { 
     final String action = intent.getAction(); 
     if (BluetoothLeService.ACTION_GATT_CONNECTED.equals(action)) { 
      mConnected = true; 
      updateConnectionState(R.string.connected); 
      mConnectionState.setTextColor(Color.parseColor("#FF17AA00")); 
      invalidateOptionsMenu(); 
     } else if (BluetoothLeService.ACTION_GATT_DISCONNECTED.equals(action)) { 
      mConnected = false; 
      updateConnectionState(R.string.disconnected); 
      invalidateOptionsMenu(); 
      clearUI(); 
     } else if (BluetoothLeService.ACTION_GATT_SERVICES_DISCOVERED.equals(action)) { 
      // Show all the supported services and characteristics on the user interface. 
      //displayGattServices(mBluetoothLeService.getSupportedGattServices()); 
     } else if (BluetoothLeService.ACTION_DATA_AVAILABLE.equals(action)) { 
      displayData(intent.getStringExtra(BluetoothLeService.EXTRA_DATA)); 
     } 
    } 
}; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_device_control); 

    final Intent intent = getIntent(); 
    mDeviceName = intent.getStringExtra(EXTRAS_DEVICE_NAME); 
    mDeviceAddress = intent.getStringExtra(EXTRAS_DEVICE_ADDRESS); 
    mConnectionState = (TextView) findViewById(R.id.connection_state); 
    mDataField = (TextView) findViewById(R.id.data); 

    Intent gattServiceIntent = new Intent(this, BluetoothLeService.class); 
    bindService(gattServiceIntent, mServiceConnection, BIND_AUTO_CREATE); 
    intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 






} 
@Override 
protected void onResume() { 
    super.onResume(); 
    registerReceiver(mGattUpdateReceiver, makeGattUpdateIntentFilter()); 
    if (mBluetoothLeService != null) { 
     final boolean result = mBluetoothLeService.connect(mDeviceAddress); 
     Log.d(TAG, "Connect request result=" + result); 
    } 

} 

@Override 
protected void onPause() { 
    super.onPause(); 
    unregisterReceiver(mGattUpdateReceiver); 
} 

@Override 
protected void onDestroy() { 
    super.onDestroy(); 
    unbindService(mServiceConnection); 
    mBluetoothLeService = null; 
} 

private void updateConnectionState(final int resourceId) { 
    runOnUiThread(new Runnable() { 
     @Override 
     public void run() { 
      mConnectionState.setText(resourceId); 
     } 
    }); 
} 

private void displayData(String data) { 
    if (data != null) { 
     mDataField.setText(data); 
    } 
} 

private void clearUI() { 
    mGattServicesList.setAdapter((SimpleExpandableListAdapter) null); 
    mDataField.setText(R.string.no_data); 
} 




private static IntentFilter makeGattUpdateIntentFilter() { 
    final IntentFilter intentFilter = new IntentFilter(); 
    intentFilter.addAction(BluetoothLeService.ACTION_GATT_CONNECTED); 
    intentFilter.addAction(BluetoothLeService.ACTION_GATT_DISCONNECTED); 
    intentFilter.addAction(BluetoothLeService.ACTION_GATT_SERVICES_DISCOVERED); 
    intentFilter.addAction(BluetoothLeService.ACTION_DATA_AVAILABLE); 
    return intentFilter; 
} 

Answer 1

それを実証しました。 サービスを繰り返すと、サービス後の特性が検出されました。

UUID chara = UUID.fromString("c97433f0-be8f-4dc8-b6f0-5343e6100eb4"); 
List<BluetoothGattService> servs = mBluetoothLeService.getSupportedGattServices(); 
      for (int i = 0; servs.size() > i; i++) { 

       List<BluetoothGattCharacteristic> charac = servs.get(i).getCharacteristics(); 
       for (int j = 0; charac.size() > i; i++) { 
        BluetoothGattCharacteristic ch = charac.get(i); 
        if (ch.getUuid() == chara) { 
         mBluetoothLeService.readCharacteristic(ch); 
         mBluetoothLeService.setCharacteristicNotification(ch, true); 

        } 
       } 
      }