Android BLE & BluetoothGattCallback.onServicesDiscovered不回调或部分回调解决
A.
如题,调用BluetoothGatt.discoverServices()返回true了,但是一直没走到onServicesDiscovered回调中,用Ble调试蓝牙助手测试了,也是一样的情况,所以应该是外设的问题,但是ios的没问题,蓝牙处理还是有差别,网上有一种方式说是延迟去多discoverServices几次,可能可以找到,尝试了一下还是不行,最后用了下面的方式基本可以解决:
加多个标志,就是连接里面加多个5s的延迟操作,如果5s后还没走回调,就重新发起连接,测试基本没问题,虽然解决了但是不知道什么原因导致的,有知道的老哥可以留言下
mHandler.postDelayed(new Runnable() { @Override public void run() { if(!isDiscoverServices){//如果还没找到服务-执行重连 connectDevice(device,context); } } },5000); @Override public void onServicesDiscovered(BluetoothGatt gatt, int status) { super.onServicesDiscovered(gatt, status); isDiscoverServices=true; }
https://blog.csdn.net/Canra/article/details/124979522
B.
1.调用gatt.discoverService需要写在onConnectionStateChange方法里面。
2.延时多调用几次discoverService方法。
https://blog.csdn.net/aozhenmo2498/article/details/101411611
C.
在网上搜寻到方案是在gatt.discoverServices()之前加延时也只能部分解决问题,当时估计应该是线程问题。后来将涉及到UI线程的控件更新去除,无需延时完美解决。
https://blog.csdn.net/hujiusi185/article/details/106681636/
refs:
Android BLE 蓝牙编程(一)
https://www.cnblogs.com/wobeinianqing/p/5838273.html
Android BLE 蓝牙编程(二)
https://www.cnblogs.com/wobeinianqing/p/5879851.html
Android BLE 蓝牙编程(三)
https://www.cnblogs.com/wobeinianqing/p/5883135.html
Android BLE 蓝牙编程(四)
https://www.cnblogs.com/wobeinianqing/p/5886756.html
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Android BLE开发指南(一)入门基础
https://blog.csdn.net/kuaiguixs/article/details/90755223
Android BLE开发指南(二)中心设备端程序开发详解
https://blog.csdn.net/kuaiguixs/article/details/91437759
Android BLE 蓝牙开发指南(三)外围设备端开发详解
https://blog.csdn.net/kuaiguixs/article/details/91886524