嗨,我得到一个
Android应用程序,但是当我启动它,我的控制台中出现错误.我正在使用Datagram套接字创建一个连接,而我正在使用2类：MainActivity(它是应用程序的主要活动)和UdpClientServer来创建连接.
这里代码MainActivity：
public class MainActivity extends Activity {
private UdpClientServer cu;
private EditText textIpScheda;
private EditText textUdpPort;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
textIpScheda = (EditText) findViewById(R.id.textIpScheda);
textUdpPort = (EditText) findViewById(R.id.textUdpPort);
try {
cu = new UdpClientServer(this);
} catch (IOException e) {
e.printStackTrace();
}
}
public EditText getTextIpScheda(){
return textIpScheda;
}
public void setTextIpScheda(EditText textIpScheda){
this.textIpScheda = textIpScheda;
}
public EditText getTextUdpPort() {
return textUdpPort;
}
public void setTextUdpPort(EditText textUdpPort) {
this.textUdpPort = textUdpPort;
}
这里代码UdpClientServer：
public class UdpClientServer {
public static String sReceive;
private static DatagramSocket dSocket;
int receiveBufferSize = 1024;
int portUdp = 0;
final String PINGACMD = "AT*PINGA001";
InetAddress ipScheda;
byte[] receiveData = new byte[receiveBufferSize];
private MainActivity gui = null;
public UdpClientServer(MainActivity gui) throws SocketException,IOException {
this.gui = gui;
portUdp = Integer.parseInt(String.valueOf(gui.getTextUdpPort().getText()));
dSocket = new DatagramSocket(portUdp);
}
public void run(){
while (true) {
// svuotamento buffer
Arrays.fill(receiveData,(byte) 0);
DatagramPacket receivePacket = new DatagramPacket(receiveData,receiveData.length);
try {
dSocket.receive(receivePacket);
} catch (IOException e) {
e.printStackTrace();
}
ipScheda = receivePacket.getAddress();
int port = receivePacket.getPort();
gui.getTextUdpPort().setText("" + port);
gui.getTextIpScheda().setText(ipScheda.getHostAddress());
sReceive = new String(receivePacket.getData());
this.sendCommand(PINGACMD);
}
}
public void sendCommand(String outSentence){
byte[] sendData = outSentence.getBytes();
DatagramPacket sendPacket = new DatagramPacket(sendData,sendData.length,ipScheda,portUdp);
try {
dSocket.send(sendPacket);
Thread.sleep(100);
} catch (IOException e) {
e.printStackTrace();
} catch (InterruptedException e) {
e.printStackTrace();
}
finally {
}
}
}
这里的logcat：
12-29 11:43:22.291 28914-28914/com.example.matteo.myfirstapp W/System.err﹕ java.net.SocketException: socket Failed: EACCES (Permission denied) 12-29 11:43:22.294 28914-28914/com.example.matteo.myfirstapp W/System.err﹕ at libcore.io.IoBridge.socket(IoBridge.java:623) 12-29 11:43:22.294 28914-28914/com.example.matteo.myfirstapp W/System.err﹕ at java.net.PlainDatagramSocketImpl.create(PlainDatagramSocketImpl.java:93) 12-29 11:43:22.294 28914-28914/com.example.matteo.myfirstapp W/System.err﹕ at java.net.DatagramSocket.createSocket(DatagramSocket.java:157) 12-29 11:43:22.294 28914-28914/com.example.matteo.myfirstapp W/System.err﹕ at java.net.DatagramSocket.<init>(DatagramSocket.java:80) 12-29 11:43:22.294 28914-28914/com.example.matteo.myfirstapp W/System.err﹕ at com.example.matteo.myfirstapp.UdpClientServer.<init>(UdpClientServer.java:32) 12-29 11:43:22.294 28914-28914/com.example.matteo.myfirstapp W/System.err﹕ at com.example.matteo.myfirstapp.MainActivity.onCreate(MainActivity.java:24) 12-29 11:43:22.294 28914-28914/com.example.matteo.myfirstapp W/System.err﹕ at android.app.Activity.performCreate(Activity.java:5933) 12-29 11:43:22.294 28914-28914/com.example.matteo.myfirstapp W/System.err﹕ at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105) 12-29 11:43:22.294 28914-28914/com.example.matteo.myfirstapp W/System.err﹕ at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2251) 12-29 11:43:22.294 28914-28914/com.example.matteo.myfirstapp W/System.err﹕ at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360) 12-29 11:43:22.294 28914-28914/com.example.matteo.myfirstapp W/System.err﹕ at android.app.ActivityThread.access$800(ActivityThread.java:144) 12-29 11:43:22.294 28914-28914/com.example.matteo.myfirstapp W/System.err﹕ at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278) 12-29 11:43:22.294 28914-28914/com.example.matteo.myfirstapp W/System.err﹕ at android.os.Handler.dispatchMessage(Handler.java:102) 12-29 11:43:22.294 28914-28914/com.example.matteo.myfirstapp W/System.err﹕ at android.os.Looper.loop(Looper.java:135) 12-29 11:43:22.294 28914-28914/com.example.matteo.myfirstapp W/System.err﹕ at android.app.ActivityThread.main(ActivityThread.java:5221) 12-29 11:43:22.294 28914-28914/com.example.matteo.myfirstapp W/System.err﹕ at java.lang.reflect.Method.invoke(Native Method) 12-29 11:43:22.294 28914-28914/com.example.matteo.myfirstapp W/System.err﹕ at java.lang.reflect.Method.invoke(Method.java:372) 12-29 11:43:22.294 28914-28914/com.example.matteo.myfirstapp W/System.err﹕ at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899) 12-29 11:43:22.294 28914-28914/com.example.matteo.myfirstapp W/System.err﹕ at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694) 12-29 11:43:22.294 28914-28914/com.example.matteo.myfirstapp W/System.err﹕ Caused by: android.system.ErrnoException: socket Failed: EACCES (Permission denied) 12-29 11:43:22.294 28914-28914/com.example.matteo.myfirstapp W/System.err﹕ at libcore.io.Posix.socket(Native Method) 12-29 11:43:22.294 28914-28914/com.example.matteo.myfirstapp W/System.err﹕ at libcore.io.BlockGuardOs.socket(BlockGuardOs.java:282) 12-29 11:43:22.294 28914-28914/com.example.matteo.myfirstapp W/System.err﹕ at libcore.io.IoBridge.socket(IoBridge.java:608) 12-29 11:43:22.294 28914-28914/com.example.matteo.myfirstapp W/System.err﹕ ... 18 more
在我的AndroidManifest.xml中刚刚添加了字符串
<uses-permission android:name="android.permission.INTERNET"/>
但它不行
你可以帮我吗？
谢谢
