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"/>

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