android 蓝牙连接广播

您好！关于 Android 蓝牙连接广播，可以通过注册 BluetoothAdapter 的 ACTION_CONNECTION_STATE_CHANGED 广播来监听蓝牙连接状态的变化，该广播会在蓝牙连接状态发生改变时被触发。可以在广播接收器中获取到连接状态的信息，从而进行相应的处理。以下是一个示例代码：

private final BroadcastReceiver mBluetoothReceiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();
        if (BluetoothAdapter.ACTION_CONNECTION_STATE_CHANGED.equals(action)) {
            int state = intent.getIntExtra(BluetoothAdapter.EXTRA_CONNECTION_STATE, BluetoothAdapter.STATE_DISCONNECTED);
            if (state == BluetoothAdapter.STATE_CONNECTED) {
                // 蓝牙已连接
            } else if (state == BluetoothAdapter.STATE_DISCONNECTED) {
                // 蓝牙已断开连接
            }
        }
    }
};

// 注册广播接收器
IntentFilter filter = new IntentFilter(BluetoothAdapter.ACTION_CONNECTION_STATE_CHANGED);
registerReceiver(mBluetoothReceiver, filter);

希望能对您有所帮助！