我正在尝试在Android中创建一个套接字,但我继续获得EACCESS(Permission denied)错误。
以下是来自UI线程的单独线程中的代码。
public class Client implements Runnable {
private final static String SERVER_ADDRESS = "173.246.12.125";
@Override
public void run() {
try {
InetAddress serverAddr = InetAddress.getByName(SERVER_ADDRESS);
DatagramSocket socket = new DatagramSocket();
...
我的Android权限包括:
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
<uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" />
并且仅仅因为一些stackoverflow答案,我也添加了这个:
<permission android:name="android.permission.INTERNET"/>
但我仍然无法创建套接字。
我错过了什么? 错误输出:
java.net.SocketException: socket failed: EACCES (Permission denied)
at libcore.io.IoBridge.socket(IoBridge.java:623)
at java.net.PlainDatagramSocketImpl.create(PlainDatagramSocketImpl.java:93)
at java.net.DatagramSocket.createSocket(DatagramSocket.java:157)
at java.net.DatagramSocket.<init>(DatagramSocket.java:80)
at java.net.DatagramSocket.<init>(DatagramSocket.java:65)
...
Caused by: android.system.ErrnoException: socket failed: EACCES (Permission denied)
at libcore.io.Posix.socket(Native Method)
at libcore.io.BlockGuardOs.socket(BlockGuardOs.java:282)
at libcore.io.IoBridge.socket(IoBridge.java:608)
at java.net.PlainDatagramSocketImpl.create(PlainDatagramSocketImpl.java:93)
at java.net.DatagramSocket.createSocket(DatagramSocket.java:157)
at java.net.DatagramSocket.<init>(DatagramSocket.java:80)
at java.net.DatagramSocket.<init>(DatagramSocket.java:65)
at com.austinfathman.traffic_server.Client.run(UDP.java:73)
at java.lang.Thread.run(Thread.java:818)
答案 0 :(得分:-3)
我遇到了类似的错误。事实证明,如果您尝试绑定到正在使用的端口,它将无法正常工作。
DatagramSocket socket = new DatagramSocket(3996);
这对我有用。