<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:orientation="vertical"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    >

<TextView

    android:layout_width="fill_parent"

    android:layout_height="wrap_content"

    android:text="hello"

    />

<Button

    android:id="@+id/scanButtonId"

    android:layout_width="fill_parent"

    android:layout_height="wrap_content"

    android:text="扫描周围的蓝牙设备"

    />

</LinearLayout>

private class ButtonListener implements OnClickListener {

        @Override

        public void onClick(View v) {

            //得到BluetoothAdapter对象

            BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter();

            //判断BluetoothAdapter对象是否为空，如果为空，则没有蓝牙设备

            if (adapter != null) {

                System.out.println("本机拥有蓝牙设备");

                if (!adapter.isEnabled()) {

                    //如果蓝牙不可用，启动蓝牙

                    System.out.println("提示启动蓝牙");

                    Intent intent = new Intent(

                            BluetoothAdapter.ACTION_REQUEST_ENABLE);

                    startActivity(intent);

                }

                //得到所有已经配对的蓝牙适配器对象(没有打开蓝牙不能搜索到已经匹配的设备)

                Set<BluetoothDevice> devices = adapter.getBondedDevices();

                if (devices.size() > ) {

                    for (Iterator iterator = devices.iterator(); iterator

                            .hasNext();) {

                        BluetoothDevice bluetoothDevice = (BluetoothDevice) iterator

                                .next();

                        //得到远程蓝牙设备的地址

                        System.out.println(bluetoothDevice.getAddress());

                    }

                }

            } else {

                System.out.println("不存在蓝牙设备");

            }

        }

    }

<uses-permission android:name="android.permission.BLUETOOTH"/>