对于 1) 如果您还没有这样做，请添加

For 1) Well if you haven't done so , add

> import java.util.Set;

在您的导入语句中.这将解决设置"错误.

in your import statements . This will resolve "Set" error.

对于2)声明并初始化

mArrayAdapter

例如在你的活动中做:

private ArrayAdapter<String> mArrayAdapter;

然后 onCreate:

 mArrayAdapter= new ArrayAdapter<String>(this, <your layout file>);

然后将其添加到 ListView

which should then be added to a ListView

//为新发现的设备查找并设置 ListView

// Find and set up the ListView for newly discovered devices

   ListView newDevicesListView = (ListView)
 findViewById(R.id.<layout_file>);
         newDevicesListView.setAdapter(mArrayAdapter);

 newDevicesListView.setOnItemClickListener(mDeviceClickListener);

参考 Android 示例中的蓝牙聊天示例.它应该可以帮助您使用蓝牙 api 的

评论更新:

如果您仔细查看 BT 示例中的 BluetoothChat.java 文件，您会看到这个

If you look closely on BluetoothChat.java file in BT example, you'll see this

public void onActivityResult(int requestCode, int resultCode, Intent data) {
        if(D) Log.d(TAG, "onActivityResult " + resultCode);
        switch (requestCode) {
        case REQUEST_CONNECT_DEVICE:
            // When DeviceListActivity returns with a device to connect
            if (resultCode == Activity.RESULT_OK) {
                // Get the device MAC address
                String address = data.getExtras()
                                     .getString(DeviceListActivity.EXTRA_DEVICE_ADDRESS);
                // Get the BLuetoothDevice object
                BluetoothDevice device = mBluetoothAdapter.getRemoteDevice(address);
                // Attempt to connect to the device
                mChatService.connect(device);
            }
            break;
        case REQUEST_ENABLE_BT:
            // When the request to enable Bluetooth returns
            if (resultCode == Activity.RESULT_OK) {
                // Bluetooth is now enabled, so set up a chat session
                setupChat();
            } else {
                // User did not enable Bluetooth or an error occured
                Log.d(TAG, "BT not enabled");
                Toast.makeText(this, R.string.bt_not_enabled_leaving, Toast.LENGTH_SHORT).show();
                finish();
            }
        }
    }

观看这一行:

 // Attempt to connect to the device
 mChatService.connect(device);

此功能连接蓝牙设备.第一次它会要求你自动配对.配对后，下次它会自动连接到蓝牙设备.

This function connects to bluetooth device. First time it'll ask you to pair it automatically. Once paired, next time it'll auto connect to the bluetooth device.