Android 如何使用 PriorityQueue 读取多个 BLE 特征

本文介绍了Android 如何使用 PriorityQueue 读取多个 BLE 特征的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述 29岁程序员，3月因学历无情被辞！ 有点卡在这里，可能需要你的帮助.我想一次读取几个 BLE 特性，有些人建议为此使用 PriorityQueue.我已经知道所有的 uuid 等，只需要一种方法一次读取几个.谁能解释一下它到底应该是什么样子?或者也许还有另一种更简单的解决方案?A bit stuck here, might need your help. I want to read several BLE characteristics at once, some people suggest using PriorityQueue for that. I already know all the uuids, etc. just need a way to read several at once.Could anyone explain how exactly should it look like? Or maybe there is yet another easier solution?提前致谢，这是我的代码:Thanks in advance, here is my code:public static final BluetoothGattCallback mGattCallback = new BluetoothGattCallback() { PriorityQueue<BluetoothGattCharacteristic> queue = new PriorityQueue<BluetoothGattCharacteristic>(); // When connection state changes @Override public void onConnectionStateChange(BluetoothGatt gatt, int status, int newState) { if (newState == BluetoothProfile.STATE_CONNECTED) { Log.v(TAG, "Connected!"); gatt.discoverServices(); } if (newState == BluetoothProfile.STATE_DISCONNECTED) { Log.v(TAG, "Disconnected..."); } } @Override public void onServicesDiscovered(BluetoothGatt gatt, int status) { List<BluetoothGattService> services = gatt.getServices(); BluetoothGattService rightService = null; for (int i = 0; i < services.size(); i++) { if (services.get(i).getCharacteristics().size() > 8) { rightService = services.get(i); } } List<UUID> uuidsList; UUID TRANSMISSION_POWER = rightService.getCharacteristics().get(4).getUuid(); UUID BROADCASTING_INTERVAL = rightService.getCharacteristics().get(6).getUuid(); UUID BEACON_NAME = rightService.getCharacteristics().get(8).getUuid(); UUID CONNECTION_MODE = rightService.getCharacteristics().get(9).getUuid(); //UUID SOFT_REBOOT = rightService.getCharacteristics().get(10).getUuid(); uuidsList = new ArrayList<UUID>(); uuidsList.add(TRANSMISSION_POWER); uuidsList.add(BROADCASTING_INTERVAL); uuidsList.add(BEACON_NAME); uuidsList.add(CONNECTION_MODE); //uuidsList.add(SOFT_REBOOT); queue.add(rightService.getCharacteristic(uuidsList.get(0))); queue.add(rightService.getCharacteristic(uuidsList.get(1))); queue.add(rightService.getCharacteristic(uuidsList.get(2))); } @Override public void onCharacteristicRead(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic, int status) { Log.v(TAG, "CHARACTERISTIC VALUE___: " + characteristic.getIntValue(BluetoothGattCharacteristic.FORMAT_UINT8, 0)); onServicesDiscovered(gatt, 0); }};更新:即使将它们放在不同的线程上，它仍然只对一个 gatt.readCharacteristic(...) 做出反应.如下:even after putting them on different threads it still only reacts to one gatt.readCharacteristic(...). like following:// Gatt Callbackpublic static final BluetoothGattCallback mGattCallback = new BluetoothGattCallback() { // When connection state changes @Override public void onConnectionStateChange(BluetoothGatt gatt, int status, int newState) { if (newState == BluetoothProfile.STATE_CONNECTED) { Log.v(TAG, "Connected!"); gatt.discoverServices(); } if (newState == BluetoothProfile.STATE_DISCONNECTED) { Log.v(TAG, "Disconnected..."); } } @Override public void onServicesDiscovered(BluetoothGatt gatt, int status) { List<BluetoothGattService> services = gatt.getServices(); /* DISPLAY ALL SERVICES AND CHARACTERISTICS for (int i = 0; i < services.size(); i++) { Log.v(TAG, "SERVICE____: " + services.get(i).getUuid()); for (int k = 0; k < services.get(i).getCharacteristics().size(); k++) { Log.v(TAG, "CHARACTERISTIC____: " + services.get(i).getCharacteristics().get(k).getUuid()); } } */ BluetoothGattService rightService = null; for (int i = 0; i < services.size(); i++) { if (services.get(i).getCharacteristics().size() > 8) { rightService = services.get(i); } } List<UUID> uuidsList; UUID TRANSMISSION_POWER = rightService.getCharacteristics().get(4).getUuid(); UUID BROADCASTING_INTERVAL = rightService.getCharacteristics().get(6).getUuid(); UUID BEACON_NAME = rightService.getCharacteristics().get(8).getUuid(); UUID CONNECTION_MODE = rightService.getCharacteristics().get(9).getUuid(); //UUID SOFT_REBOOT = rightService.getCharacteristics().get(10).getUuid(); uuidsList = new ArrayList<UUID>(); uuidsList.add(TRANSMISSION_POWER); uuidsList.add(BROADCASTING_INTERVAL); uuidsList.add(BEACON_NAME); uuidsList.add(CONNECTION_MODE); //uuidsList.add(SOFT_REBOOT); class powerThread extends Thread{ UUID uuid; BluetoothGatt gatt; BluetoothGattService service; public powerThread(UUID uuid, BluetoothGatt gatt, BluetoothGattService service) { this.gatt = gatt; this.service = service; this.uuid = uuid; } @Override public void run() { gatt.readCharacteristic(service.getCharacteristic(uuid)); } } powerThread pt = new powerThread(TRANSMISSION_POWER, gatt, rightService); pt.run(); class intervalThread extends Thread{ UUID uuid; BluetoothGatt gatt; BluetoothGattService service; public intervalThread(UUID uuid, BluetoothGatt gatt, BluetoothGattService service) { this.gatt = gatt; this.service = service; this.uuid = uuid; } @Override public void run() { gatt.readCharacteristic(service.getCharacteristic(uuid)); } } intervalThread it = new intervalThread(BROADCASTING_INTERVAL, gatt, rightService); it.run(); } @Override public void onCharacteristicRead(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic, int status) { Log.v(TAG, "CHARACTERISTIC VALUE___: " + characteristic.getIntValue(BluetoothGattCharacteristic.FORMAT_UINT8, 0)); }};推荐答案对于可能遇到相同问题的任何人，这里有一个使用列表的简单解决方案特征.To anyone who might encounter the same problem, here is an easy solution using a List<> of characteristics.public static final BluetoothGattCallback readGattCallback = new BluetoothGattCallback() { List<BluetoothGattCharacteristic> chars = new ArrayList<>(); @Override public void onConnectionStateChange(BluetoothGatt gatt, int status, int newState) { if (newState == BluetoothProfile.STATE_CONNECTED) { Log.v(TAG, "Connected!"); broadcastingInterval = 999; transmissionPower = 999; gatt.discoverServices(); } if (newState == BluetoothProfile.STATE_DISCONNECTED) { Log.v(TAG, "Disconnected..."); } } @Override public void onServicesDiscovered(BluetoothGatt gatt, int status) { List<BluetoothGattService> services = gatt.getServices(); BluetoothGattService rightService = null; for (int i = 0; i < services.size(); i++) { if (services.get(i).getCharacteristics().size() > 8) { rightService = services.get(i); } } chars.add(rightService.getCharacteristics().get(4)); chars.add(rightService.getCharacteristics().get(6)); requestCharacteristics(gatt); } public void requestCharacteristics(BluetoothGatt gatt) { gatt.readCharacteristic(chars.get(chars.size()-1)); } @Override public void onCharacteristicRead(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic, int status) { if (status == BluetoothGatt.GATT_SUCCESS) { if (characteristic.getUuid().toString().substring(7, 8).equals("5")) { transmissionPower = characteristic.getIntValue(BluetoothGattCharacteristic.FORMAT_UINT8, 0); Log.v(TAG, "tPOWER READ"); } else if (characteristic.getUuid().toString().substring(7,8).equals("7")) { broadcastingInterval = characteristic.getIntValue(BluetoothGattCharacteristic.FORMAT_UINT8, 0); Log.v(TAG, "INTERVAL READ"); } chars.remove(chars.get(chars.size() - 1)); if (chars.size() > 0) { requestCharacteristics(gatt); } else { gatt.disconnect(); } } }};创建特征列表在 onServicesDiscovered 中，使用您想要读/写的特征填充列表创建一个名为 requestCharacteristics(gatt) 的新方法并将 gatt 对象传递给它.将特征添加到列表后，从 onServicesDiscovered 调用此方法.在 requestCharacteristics() 方法中调用 gatt.readCharacteristic(chars.get(chars.size()-1));在 onCharacteristicRead 中，检查列表的大小是否不为零，然后读取您的特征，删除列表的最后一项并再次调用 requestCharacteristic().仅此而已 这篇关于Android 如何使用 PriorityQueue 读取多个 BLE 特征的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！