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问题描述 最近在开发android BLE  读写数据

但是向设备写数据很顺利,但是在接收设备传来的数据时,死活接收不到.

 /**     * Enables or disables notification on a give characteristic.     *     * @param characteristic Characteristic to act on.     * @param enabled        If true, enable notification.  False otherwise.     */    public void setCharacteristicNotification(BluetoothGattCharacteristic characteristic,                                              boolean enabled) {        if (mBluetoothAdapter == null || mBluetoothGatt == null) {            Log.w(TAG, "BluetoothAdapter not initialized");            return;        }        mBluetoothGatt.setCharacteristicNotification(characteristic, enabled);        }

上面这样写 是收不到数据的 ,主要是少加了mBluetoothGatt.writeDescriptor(descriptor);

下面是修改后的代码

   /**     * Enables or disables notification on a give characteristic.     *     * @param characteristic Characteristic to act on.     * @param enabled        If true, enable notification.  False otherwise.     */    public void setCharacteristicNotification(BluetoothGattCharacteristic characteristic,                                              boolean enabled) {        if (mBluetoothAdapter == null || mBluetoothGatt == null) {            Log.w(TAG, "BluetoothAdapter not initialized");            return;        }//        mBluetoothGatt.setCharacteristicNotification(characteristic, enabled);        boolean isEnableNotification =  mBluetoothGatt.setCharacteristicNotification(characteristic, enabled);        if(isEnableNotification) {            List<BluetoothGattDescriptor> descriptorList = characteristic.getDescriptors();            if(descriptorList != null && descriptorList.size() > 0) {                for(BluetoothGattDescriptor descriptor : descriptorList) {                    descriptor.setValue(BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE);                    mBluetoothGatt.writeDescriptor(descriptor);                }            }        }    }

 如果 不是这种 情况接收不到数据就是另外一种可能了characteristic的 uuid设置不对

你可以看下 boolean isEnableNotification = mBluetoothGatt.setCharacteristicNotification(characteristic, enabled);

返回的是false 还是true,

另外还会再写一篇关于蓝牙数据读写的文章

以上就介绍了 android BLE 40 setCharacteristicNotification接收不到数据，包括了方面的内容，希望对Android开发有兴趣的朋友有所帮助。

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android BLE 40 setCharacteristicNotification接收不到数据