Java中的Android唤醒局域网

Question

我正在尝试用Java（适用于Android）制作Wake-On-Lan应用程序，所以我搜索了一下，发现了以下代码：

import java.io.*;
import java.net.*;
public class WakeOnLan {
public static final int PORT = 9;    
public static void main(String[] args) {
    if (args.length != 2) {
        System.out.println("Usage: java WakeOnLan <broadcast-ip> <mac-address>");
        System.out.println("Example: java WakeOnLan 192.168.0.255 00:0D:61:08:22:4A");
        System.out.println("Example: java WakeOnLan 192.168.0.255 00-0D-61-08-22-4A");
        System.exit(1);
    }
    String ipStr = args[0];
    String macStr = args[1];
    try {
        byte[] macBytes = getMacBytes(macStr);
        byte[] bytes = new byte[6 + 16 * macBytes.length];
        for (int i = 0; i < 6; i++) {
            bytes[i] = (byte) 0xff;
        }
        for (int i = 6; i < bytes.length; i += macBytes.length) {
            System.arraycopy(macBytes, 0, bytes, i, macBytes.length);
        }
        InetAddress address = InetAddress.getByName(ipStr);
        DatagramPacket packet = new DatagramPacket(bytes, bytes.length, address, PORT);
        DatagramSocket socket = new DatagramSocket();
        socket.send(packet);
        socket.close();
        System.out.println("Wake-on-LAN packet sent.");
    }
    catch (Exception e) {
        System.out.println("Failed to send Wake-on-LAN packet: + e");
        System.exit(1);
    }
}
 private static byte[] getMacBytes(String macStr) throws IllegalArgumentException {
    byte[] bytes = new byte[6];
    String[] hex = macStr.split("(\:|\-)");
    if (hex.length != 6) {
        throw new IllegalArgumentException("Invalid MAC address.");
    }
    try {
        for (int i = 0; i < 6; i++) {
            bytes[i] = (byte) Integer.parseInt(hex[i], 16);
        }
    }
        catch (NumberFormatException e) {
        throw new IllegalArgumentException("Invalid hex digit in MAC address.");
    }
    return bytes;
}

}

我在我的电脑上试过了，它起作用了，但对安卓系统不起作用：（我试过编辑它，但仍然一无所获：）这是我的安卓代码：

import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import com.macura.wakemypc.MainActivity;
import com.macura.wakemypc.R;
import com.macura.wakemypc.MainActivity;
import com.macura.wakemypc.MainActivity;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.widget.EditText;
public class MainActivity extends Activity {
public static final int PORT = 9;    


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}
public void buttonClick(View view) {
    EditText iptext = (EditText)findViewById(R.id.editText1);
    EditText mactext = (EditText)findViewById(R.id.editText2);
    String mac = mactext.toString();
    String broadcastIP = iptext.toString();
    MainActivity.wakeup(broadcastIP, mac);
 }
private static byte[] getMacBytes(String mac) throws IllegalArgumentException {
    // TODO Auto-generated method stub
    byte[] bytes = new byte[6];
    if (mac.length() != 12)
    {
        throw new IllegalArgumentException("Invalid MAC address...");
    }
    try {
        String hex;
        for (int i = 0; i < 6; i++) {
            hex = mac.substring(i*2, i*2+2);
            bytes[i] = (byte) Integer.parseInt(hex, 16);
        }
    }
    catch (NumberFormatException e) {
        throw new IllegalArgumentException("Invalid hex digit...");
    }
    return bytes;
}
public static void wakeup(String broadcastIP, String mac) {
    if (mac == null) {
        return;
    }
        try {
            byte[] macBytes = getMacBytes(mac);
            byte[] bytes = new byte[6 + 16 * macBytes.length];
            for (int i = 0; i < 6; i++) {
                bytes[i] = (byte) 0xff;
            }
            for (int i = 6; i < bytes.length; i += macBytes.length) {
                System.arraycopy(macBytes, 0, bytes, i, macBytes.length);
            }
            InetAddress address = InetAddress.getByName(broadcastIP);
            DatagramPacket packet = new DatagramPacket(bytes, bytes.length, address, 5555);
            DatagramSocket socket = new DatagramSocket();
            socket.send(packet);
            socket.close();

        }
        catch (Exception e) {
    }
}
}

每次我输入ip和mac地址时，它都不会起任何作用。那么，你能帮我吗？：）是的，很抱歉我的英语：D

Answer 1

我不在乎其余的代码，但您应该使用String mac = mactext.getText().toString();而不是String mac = mactext.toString();，因为如果不进行此更改，您将转换为字符串整个EditText，而不仅仅是其值。附言：我知道这是10个月后的问题，但对于任何来这里寻找WOL android代码的人来说，它应该是有用的

Answer 2

我知道现在有点晚了，但我也花了很长时间让这段java代码在android上运行。解决方案是使用广播ip。仅此而已。干杯j