完全断开蓝牙低功耗设备的连接 [英] Totally Disconnect a Bluetooth Low Energy Device

问题描述

我在Android中使用connectGatt()方法连接到BLE设备.效果很好.

I connect to a BLE device with the connectGatt() method in Android. This works great.

当我断开连接时，请使用以下内容:

When I disconnect I use the following:

private void disconnectDevice() {
    gatt.disconnect();
}

当我收到回叫时，我将关闭.

When I receive the callback I do a close.

private BluetoothGattCallback gattCallback = new BluetoothGattCallback() {
    @Override
    public void onConnectionStateChange(BluetoothGatt gatt, int status, int newState) {
        switch (newState) {
            case BluetoothProfile.STATE_CONNECTED:
                Log.d("BLED-GATT", "STATE_CONNECTED");
                setUIConnectionStatus("Discover services on device...", Color.YELLOW);
                checkEnableAddButton(simpleTrackEditText.getText().toString());
                gatt.discoverServices();
                break;
            case BluetoothProfile.STATE_DISCONNECTED:
                Log.d("BLED-GATT", "STATE_DISCONNECTED");
                setUIConnectionStatus("Not Connected!", Color.RED);
                gatt.close();
                break;
            default:
                Log.d("BLED-GATT", "STATE_OTHER");
        }
    }
}

这已执行，调用disconnectDevice()后我无法再控制设备.该设备本身似乎认为它仍处于连接状态，因为我无法将其置于广播可见性模式下(如果已经具有连接，则会发生这种情况).但是，如果我终止该应用程序并再次打开它，则可以将设备设置为广播模式.这告诉我该应用未正确断开连接.

This is executed and I can no longer control the device after calling disconnectDevice(). The device itself seems to think that it is still connected since I cant put it in broadcasting visibility mode (which happens if it already has a connection). However, if I kill the application and open it again then I can set the device in broadcasting mode. This tells me the app was not properly disconnected.

知道我在这里错过了什么吗?

Any idea what I missed here?

推荐答案

问题是我在扫描期间多次连接到同一设备，导致我的应用程序同时打开了许多连接.添加!isConnected()解决了该问题:

The problem was that I during scanning was connecting to the same device multiple times causing my application to have many connections open at the same time. Adding !isConnected() solved the problem:

/**
 * Connects to the device. Does nothing if already connected.
 * @param macAddress the address of the device.
 */
private void connectDevice(String macAddress) {
    if (isConnected()) {
        return;
    }
    
    device = bluetoothAdapter.getRemoteDevice(macAddress);

    if (device == null) {
        this.sendToast("Device Not Available");
    } else {
        Log.d("BLED", "Connecting...");
        gatt = device.connectGatt(this, true, gattCallback);
    }
}

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