Hi,
I am trying to send a list from the android device to a webserver
which will receive the list and send it back to the android device. I
have written the below code and it runs fine if I just send values but
when I send an object, the app freezes. Could someone please help me
out in this.
Thanks
Code for client
package com.httpurl;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.ObjectOutputStream;
import java.io.OutputStreamWriter;
import java.net.URL;
import java.net.URLConnection;
import java.util.ArrayList;
import java.util.List;
import java.util.StringTokenizer;
import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends Activity {
public static List<MyFriend> listOfFriends = new
ArrayList<MyFriend>();
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getFriendsList();
getconnection(listOfFriends);
setContentView(R.layout.main);
TextView tv = new TextView(this);
tv.setText("hello");
setContentView(tv);
}
public void getFriendsList() {
String FName =null;
String LName =null;
String Latitude =null;
String Longitude =null;
String TimeStamp =null;
String line[] = new String[3];
line[0]= "Al#Rb#23.44#34.44#4.45";
line[1]= "Al#Az#33.44#44.44#5.45";
line[2]= "Kl#Az#53.44#454.44#6.45";
for(int k=0;k<=2;k++){
StringTokenizer tokens=new StringTokenizer(line[k],"#");
try{
while(tokens.hasMoreTokens())
{
FName=tokens.nextToken();
LName=tokens.nextToken();
Latitude=tokens.nextToken();
Longitude=tokens.nextToken();
TimeStamp=tokens.nextToken();
listOfFriends.add(new
MyFriend(FName,LName,Latitude,Longitude,TimeStamp));
}
}
catch (Exception e){
Toast.makeText(this,
"Some prob here:"+e.getLocalizedMessage(),
Toast.LENGTH_SHORT).show();
e.printStackTrace();
}
}
}
private void getconnection(List<MyFriend> list) {
try{
URL url = new
URL("http://10.0.2.2/HelloServlet/NewServlet";);
URLConnection conn = url.openConnection();
conn.setDoOutput(true);
Toast.makeText(getBaseContext(),
"connection set",
Toast.LENGTH_SHORT).show();
//OutputStreamWriter writer = new
OutputStreamWriter(conn.getOutputStream());
ObjectOutputStream out = new
ObjectOutputStream(conn.getOutputStream());
out.writeObject(list);
//writer.write("value=hello&anotherValue=how r u");
out.flush();
Toast.makeText(getBaseContext(),
"sent the list",
Toast.LENGTH_SHORT).show();
String line;
BufferedReader reader = new BufferedReader(new
InputStreamReader(conn.getInputStream()));
while ((line = reader.readLine()) != null) {
System.out.println(line);
Toast.makeText(getBaseContext(),
"received from server"+line,
Toast.LENGTH_SHORT).show();
}
out.close();
reader.close();
}
catch (Exception e){
}
}
}
The Server code is
protected void processRequest(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException, ClassNotFoundException {
response.setContentType("text/html;charset=UTF-8");
PrintWriter out = response.getWriter();
ObjectInputStream ois = new
ObjectInputStream(request.getInputStream());
List<MyFriend> list = (List<MyFriend>) ois.readObject();
Iterator itr = list.iterator();
while(itr.hasNext()){
MyFriend obj = (MyFriend) itr.next();
out.println("recived:"+obj.getFName());
}
String value2 = request.getParameter("anotherValue");
try {
//out.println("<html>");
//out.println("<head>");
//out.println("<title>Servlet NewServlet</title>");
//out.println("</head>");
//out.println("<body>");
//out.println("<h1>Servlet NewServlet at " +
request.getContextPath () + "</h1>");
//out.println("recived"+value+" nextvalue"+value2);
//out.println("</body>");
//out.println("</html>");
} finally {
out.close();
}
}
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