在我的应用程序中,我需要配对蓝牙设备并立即与它连接.
我有以下功能,以配对设备：
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;
}
我用它如下：
Boolean isBonded = false;
try {
isBonded = createBond(bdDevice);
if(isBonded)
{
//Connect with device
}
}
它显示了配对设备和输入引脚的对话框.
问题是createBond函数总是返回true,它一直等到我输入引脚并与设备配对,所以我没有正确使用：
isBonded = createBond(bdDevice);
if(isBonded) {...}
所以问题是我如何与设备配对以及何时配对连接？
P.D我的代码基于以下主题的第一个答案：Android + Pair devices via bluetooth programmatically
最佳答案
我找到了解决方案.
首先,我需要一个BroadcastReceiver,如：
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器如下：
IntentFilter intentFilter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
intentFilter.addAction(BluetoothDevice.ACTION_BOND_STATE_CHANGED);
context.registerReceiver(myReceiver,intentFilter);
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为BOND_BOUNDED以及它是否与设备连接.
现在当我调用createBond方法(在问题中描述)并输入引脚时,ACTION_BOND_STATE_CHANGED将触发,而device.getBondState()== BluetoothDevice.BOND_BONDED将为True并且它将连接.
