android BLE写操作中的函数（Setcharacteristicnotification）

Question

如果我执行写操作，则表示将数据从手机发送到BLE。 ClientConfig.setValue（BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE）无法运行，并且应用程序将停止。 当我写道，它应该调用setCharacteristicnotification？ 此外，当我写，oncharacteristicwrite staus = 133.我不明白写得很好。这是我的代码。

private final ExpandableListView.OnChildClickListener servicesListClickListner = 
    new ExpandableListView.OnChildClickListener() { 
     @Override 
     public boolean onChildClick(ExpandableListView parent, View v, int groupPosition, 
            int childPosition, long id) { 
      if (mGattCharacteristics != null) { 
       final BluetoothGattCharacteristic characteristic = 
         mGattCharacteristics.get(groupPosition).get(childPosition); 
       final int charaProp = characteristic.getProperties(); 

       if ((charaProp | BluetoothGattCharacteristic.PROPERTY_READ) > 0) { 
        if (mNotifyCharacteristic != null) { 
         mBluetoothLeService.setCharacteristicNotification(
           mNotifyCharacteristic, false); 
         mNotifyCharacteristic = null; 
        } 
        mBluetoothLeService.readCharacteristic(characteristic); 

       } 
       if ((charaProp | BluetoothGattCharacteristic.PROPERTY_WRITE) > 0) { 
         // If there is an active notification on a characteristic, clear 
         // it first so it doesn't update the data field on the user interface. 
         if (mNotifyCharacteristic != null) { 
          mBluetoothLeService.setCharacteristicNotification(
            mNotifyCharacteristic, false); 
          mNotifyCharacteristic = null; 
         } 
         mBluetoothLeService.writeCharacteristic(characteristic); 
       } 
       if ((charaProp | BluetoothGattCharacteristic.PROPERTY_NOTIFY) > 0) { 
        mNotifyCharacteristic = characteristic; 
        System.out.println("kkkkkkkkkk+="+characteristic.getUuid()); 
        mBluetoothLeService.setCharacteristicNotification(
          characteristic, true); 
       } 

       tv_uuid.setText(characteristic.getUuid().toString()); 
       Intent intent=new Intent(); 
       b.putString("CONNET_SATE", status); 
       b.putString("UUID", characteristic.getUuid().toString()); 
       intent.putExtras(b); 
       intent.setClass(MyGattDetail.this, FunctionActivity.class); 
       startActivity(intent); 
       return true; 
      } 
      return false; 
     } 
    }; 

public void setCharacteristicNotification(BluetoothGattCharacteristic characteristic, 
              boolean enabled) { 
    if (mBluetoothAdapter == null || mBluetoothGatt == null) { 
     Log.w(TAG, "BluetoothAdapter not initialized"); 
     return; 
    } 
    mBluetoothGatt.setCharacteristicNotification(characteristic, enabled); 

    BluetoothGattDescriptor clientConfig = characteristic.getDescriptor(UUID.fromString("00002902-0000-1000-8000-00805f9b34fb")); 

    if (enabled) { 
     clientConfig.setValue(BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE); 
    } else { 
     clientConfig.setValue(BluetoothGattDescriptor.DISABLE_NOTIFICATION_VALUE); 
    } 
    mBluetoothGatt.writeDescriptor(clientConfig); 
} 

public static void write(String s){ 
    final int charaProp = target_chara.getProperties();    
    if ((charaProp | BluetoothGattCharacteristic.PROPERTY_WRITE) > 0) { 
     //注意: 以下读取的值 通过 BluetoothGattCallback#onCharacteristicRead() 函数返回 
     target_chara.setValue(s); 
     mBluetoothLeService.writeCharacteristic(target_chara); 
    } 
} 



public void writeCharacteristic(BluetoothGattCharacteristic characteristic) { 
    if (mBluetoothAdapter == null || mBluetoothGatt == null) { 
     Log.w(TAG, "BluetoothAdapter not initialized"); 
     return; 
    } 
    mBluetoothGatt.writeCharacteristic(characteristic); 
} 

public void onCharacteristicRead(BluetoothGatt gatt, 
            BluetoothGattCharacteristic characteristic, 
            int status) { 
    if (status == BluetoothGatt.GATT_SUCCESS) { 
     Log.i(TAG, "--onCharacteristicRead called--"); 
     byte[] sucString=characteristic.getValue(); 
     String string= new String(sucString); 
     broadcastUpdate(ACTION_DATA_AVAILABLE, characteristic); 
    } 
    if (mOnDataAvailableListener!=null) 
     mOnDataAvailableListener.onCharacteristicRead(gatt, characteristic, status); 
} 

@Override 
public void onCharacteristicChanged(BluetoothGatt gatt, 
            BluetoothGattCharacteristic characteristic) { 
    System.out.println("++++++++++++++++"); 
    broadcastUpdate(ACTION_DATA_AVAILABLE, characteristic); 
} 

@Override 
public void onCharacteristicWrite(BluetoothGatt gatt, 
     BluetoothGattCharacteristic characteristic, int status) { 
    // TODO Auto-generated method stub 
    //super.onCharacteristicWrite(gatt, characteristic, status); 
    Log.w(TAG, "--onCharacteristicWrite--: " + status); 

    //以下语句实现 发送完数据或也显示到界面上 
    broadcastUpdate(ACTION_DATA_AVAILABLE, characteristic); 
} 

Answer 1

133 = 0x5;

BluetoothGatt.java

/** Insufficient authentication for a given operation */ 
public static final int GATT_INSUFFICIENT_AUTHENTICATION = 0x5; 

所以133是指对于给定的操作没有足够的验证。

ClientConfig可以为空。

BluetoothGattDescriptor clientConfig = characteristic.getDescriptor(UUID.fromString("00002902-0000-1000-8000-00805f9b34fb")); 
if(clientConfig !=null){ 

    if (enabled) { 
     clientConfig.setValue(BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE); 
    } else { 
     clientConfig.setValue(BluetoothGattDescriptor.DISABLE_NOTIFICATION_VALUE); 
    } 
    mBluetoothGatt.writeDescriptor(clientConfig); 
}