我目前正致力于在 Android 上编写一个简单的消息应用程序。我在一个名为 的类中有服务器RunServer，它运行完美。然后我在MainActivity调用的方法中有一个客户端startClient()。我有一个按钮，它有一个onclick="startClient". 但是每当我点击按钮时，什么都没有发生。我试图在任何地方都放入日志，这就是它不起作用的地方：
socket.connect(ipPort);
我似乎无法弄清楚问题是什么。我尝试了不同的端口和 IP 地址，但仍然没有。
MainActivity：
public class MainActivity extends Activity {
private Socket socket;
private ObjectInputStream ois;
private DataOutputStream dos;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
runOnUiThread(new Runnable() {
public void run() {
EditText et = (EditText) findViewById(R.id.message_id);
String message = et.getText().toString();
EditText et1 = (EditText) findViewById(R.id.messages);
et1.append(message);
}
});
}
public void startClient(View v) {
socket = new Socket();
InetSocketAddress ipPort = new InetSocketAddress("10.0.2.2", 4444);
System.out.println("HEJ!");
try {
socket.connect(ipPort); // här tar det stop
Log.v("It works", "Hello");
dos = new DataOutputStream(socket.getOutputStream());
} catch (Exception e) {
}
Thread thread = new Thread();
thread.start();
}
}
RunServer：
public class RunServer {
private ServerSocket server;
private Socket socket;
private DataInputStream dis;
private int port;
public RunServer(int port) {
this.port = port;
Thread connectThread = new Thread(new Connect());
connectThread.start();
}
private class Connect implements Runnable {
public void run() {
try {
server = new ServerSocket(port);
System.out.println("Server running");
while (true) {
socket = server.accept();
Thread clientThread = new Thread(new TalkToClient(socket));
clientThread.start();
System.out.println("someone connected");
}
} catch (IOException ex) {
Logger.getLogger(RunServer.class.getName()).log(Level.SEVERE,
null, ex);
}
try {
server.close();
} catch (Exception e) {
}
}
}
private class TalkToClient implements Runnable {
private Socket socket;
public TalkToClient(Socket socket) {
this.socket = socket;
}
public void run() {
String clientMsg;
try {
dis = new DataInputStream(socket.getInputStream());
while ((clientMsg = dis.readUTF()) != null) {
if (clientMsg.length() > 0) {
System.out.println("Whatup");
}
}
} catch (Exception e) {
System.out.println(e);
}
}
}
public static void main(String[] args) {
new RunServer(4444);
}
}
布局：
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/bakgrund"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity" >
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:text="@string/ip"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="@color/white" />
<EditText
android:id="@+id/ip_id"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:layout_below="@+id/textView1"
android:background="@color/white"
android:ems="10"
android:hint="@string/get_ip"
android:inputType="numberDecimal" >
<requestFocus />
</EditText>
<TextView
android:id="@+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/ip_id"
android:text="@string/port"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="@color/white" />
<EditText
android:id="@+id/port_id"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:layout_below="@+id/textView2"
android:background="@color/white"
android:ems="10"
android:hint="@string/get_port"
android:inputType="number" />
<TextView
android:id="@+id/textView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/port_id"
android:layout_below="@+id/port_id"
android:text="@string/message"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="@color/white" />
<EditText
android:id="@+id/message_id"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:layout_below="@+id/textView3"
android:background="@color/white"
android:ems="10"
android:hint="@string/get_message" />
<Button
android:id="@+id/connect"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/message_id"
android:onClick="startClient"
android:text="@string/connect"
android:textColor="@color/white" />
<Button
android:id="@+id/send"
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/connect"
android:layout_alignBottom="@+id/connect"
android:layout_toRightOf="@+id/connect"
android:text="@string/send"
android:textColor="@color/white" />
<TextView
android:id="@+id/status_id"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/connect"
android:layout_below="@+id/send"
android:layout_marginTop="23dp"
android:text="@string/status"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="@color/white" />
<EditText
android:id="@+id/messages"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:layout_below="@+id/status_id"
android:background="@color/white"
android:ems="10"
android:inputType="textMultiLine" />
</RelativeLayout>
清单：
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.datorkomprojekt"
android:versionCode="1"
android:versionName="1.0" >
<uses-permission android:name="android.permission.INTERNET" />
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.example.datorkomprojekt.MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>