配对编程后，Android的蓝牙连接设备自动 [英] Android Connect Bluetooth device automatically after pairing programmatically

问题描述

在我的应用我需要在配对蓝牙设备并立即与它连接。

In my app I need pairing bluetooth device and immediately connect with it.

我有以下的功能，以配对设备：

I have the following function in order to pairing devices:

public boolean createBond(BluetoothDevice btDevice)
{
    try {
        Log.d("pairDevice()", "Start Pairing...");
        Method m = btDevice.getClass().getMethod("createBond", (Class[]) null);
        Boolean returnValue = (Boolean) m.invoke(btDevice, (Object[]) null);
        Log.d("pairDevice()", "Pairing finished.");
        return returnValue;

    } catch (Exception e) {
        Log.e("pairDevice()", e.getMessage());
    }
    return false;
}

和我使用它作为方式如下：

And I use it as the following way:

Boolean isBonded = false;
try {
    isBonded = createBond(bdDevice);
    if(isBonded)
    {
         //Connect with device
    }
}

和它告诉我的对话框配对设备，并输入PIN码。

And it show me the dialog to pairing devices and enter the pin.

问题是，createBond函数始终返回true，它DOEN的等待，直到我进入引脚和与设备配对，所以不正确使用：

The problem is that createBond functions always return true, and it doen's wait until I enter the pin and paired with device, so I don't use correctly:

isBonded = createBond(bdDevice);
if(isBonded) {...}

所以，问题是我如何与设备配对，当它配对连接到它？

So the question is How can I paired with device and when it is paired connect to it?

PD我的code是总部设在以下螺纹的第一个答案： Android设备蓝牙配对

P.D My code is based in the first answer of the following thread: Android Device Bluetooth pairing

推荐答案

我找到了解决办法。

首先，我需要一个广播接收器这样的：

First I need a BroadcastReceiver like:

private BroadcastReceiver myReceiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();
        if (BluetoothDevice.ACTION_BOND_STATE_CHANGED.equals(action)) {
            BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
            if (device.getBondState() == BluetoothDevice.BOND_BONDED) {
                // CONNECT
            }
        } else if (BluetoothDevice.ACTION_FOUND.equals(action)) {
            BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
            // Discover new device
        }
    }
};

然后我需要注册接收如下：

And then I need register the receiver as follow:

IntentFilter intentFilter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
intentFilter.addAction(BluetoothDevice.ACTION_BOND_STATE_CHANGED);
context.registerReceiver(myReceiver, intentFilter);

在这样的接收器监听 ACTION_FOUND （发现新设备）和 ACTION_BOND_STATE_CHANGED （设备改变其债券状态），那么我是否新的状态是 BOND_BOUNDED ，如果是我与设备连接。

In this way the receiver is listening for ACTION_FOUND (Discover new device) and ACTION_BOND_STATE_CHANGED (Device change its bond state), then I check if the new state is BOND_BOUNDED and if it is I connect with device.

现在，当我打电话 createBond 方法（在问题中所述），并输入引脚， ACTION_BOND_STATE_CHANGED 将开火， device.getBondState（）== BluetoothDevice.BOND_BONDED 将真键，它会连接。

Now when I call createBond Method (described in the question) and enter the pin, ACTION_BOND_STATE_CHANGED will fire and device.getBondState() == BluetoothDevice.BOND_BONDED will be True and it will connect.

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