以编程方式配对后，Android 会自动连接蓝牙设备
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原文地址: http://stackoverflow.com/questions/21776712/
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Android Connect Bluetooth device automatically after pairing programmatically
提问by RdlP
In my app I need pairing bluetooth device and immediately connect with it.
在我的应用程序中，我需要配对蓝牙设备并立即与之连接。
I have the following function in order to pairing devices:
我有以下功能来配对设备：
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;
}
And I use it as the following way:
我按以下方式使用它：
Boolean isBonded = false;
try {
isBonded = createBond(bdDevice);
if(isBonded)
{
//Connect with device
}
}
And it show me the dialog to pairing devices and enter the pin.
它向我显示配对设备的对话框并输入引脚。
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:
问题是 createBond 函数总是返回 true，它确实等到我输入 pin 并与设备配对，所以我没有正确使用：
isBonded = createBond(bdDevice);
if(isBonded) {...}
So the question is How can I paired with device and when it is paired connect to it?
所以问题是如何与设备配对以及何时配对连接到它？
P.D My code is based in the first answer of the following thread: Android + Pair devices via bluetooth programmatically
PD 我的代码基于以下线程的第一个答案：Android + Pair devices via bluetooth programmatically
采纳答案by RdlP
I found the solution.
我找到了解决方案。
First I need a BroadcastReceiverlike:
首先我需要一个BroadcastReceiver喜欢：
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
}
}
};
And then I need register the receiver as follow:
然后我需要注册接收器如下：
IntentFilter intentFilter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
intentFilter.addAction(BluetoothDevice.ACTION_BOND_STATE_CHANGED);
context.registerReceiver(myReceiver, intentFilter);
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_BOUNDEDand if it is I connect with device.
通过这种方式，接收器正在侦听ACTION_FOUND（发现新设备）和ACTION_BOND_STATE_CHANGED（设备更改其绑定状态），然后我检查新状态是否BOND_BOUNDED以及是否与设备连接。
Now when I call createBondMethod (described in the question) and enter the pin, ACTION_BOND_STATE_CHANGEDwill fire and device.getBondState() == BluetoothDevice.BOND_BONDEDwill be Trueand it will connect.
现在，当我打电话createBond的方法（在问题中所述），并输入PIN码，ACTION_BOND_STATE_CHANGED将火和device.getBondState() == BluetoothDevice.BOND_BONDED会True，它会连接。
