android之蓝牙设备的使用01

<?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() > 0) {
                    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"/>