I am trying to post from android to GAE, I am getting unknown host exception.
Here is my code:
CODE:.......
When I am trying to connect to localhost:8888 am getting connection refused. I donno how to go pass thru this.
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I have android code that uses a background process to routinely (e.g. hourly) connect to a content source on the web to check for updated content. As new users download the app and run it for the first time, it seems (and this is just a "seems at the moment) that in this first-run situation, because the DNS for our servers are not cached already on the device, those first series of connections fail with dreaded UnknownHostException: Host is unresolved. And of course, the application tries again later and (again, "it seems like") it is all working -- perhaps because the OS has had time to actually resolve the address. So, my question(s) are: (1) Do other Android developers see this behavior with their deployed applications as well? First time, a series of "host unresolved" issues that work themselves out later. (2) Does anyone have a better strategy for "warming up the DNS" so-to-speak so that the first real connections work? or perhaps do you just re-try with some back-off looping when you encounter this exception? I was contemplating having a separate thread that tries to fetch a small text file from our server and have it just loop until it gets it and maybe (not sure about this part) block the other outgoing network connections until it succeeds.
View 1 Replies View RelatedI am running the CTS on the Arm based phone. When I tried to run the Network related test cases.I am getting the above error in the "android.core.tests.luni.net" test package and due to this error around 179 test cases are getting failed.Please help me out.Is there any environment setting issue in the setting up the target.I have connected the target with the USB to my Fedora system. additionally target have the 3G Sim connected with It.
View 2 Replies View RelatedI send files to FTP server in my application. Internet permission is set :
<uses-permission android:name="android.permission.INTERNET"/>
It works quite fine when connected with 3G/3G+. Sometimes, not very often, I get a "SocketException no route to host" or "unknown host" exception when trying to connect. When I'm connected with WIFI, it works sometimes and it's very fast, but the same error occurs very often, and when it has occurred I must restart my WiFi to be able to connect again, even with webbrowser. I use apache commons FTPClient this way:
ftpClient.connect(server, 21); ftpClient.login(user, password);
ftpClient.changeWorkingDirectory(directory); ftpClient.setFileType(FTP.BINARY_FILE_TYPE);
BufferedInputStream buffIn = new BufferedInputStream(new FileInputStream(file));
ftpClient.enterLocalPassiveMode(); ftpClient.storeFile(file.getName(), buffIn); buffIn.close();
ftpClient.logout(); ftpClient.disconnect();
Errors look like this:
06-12 11:17:32.887: ERROR/DictoSyl(3146): No route to host 06-12 11:17:32.887:
ERROR/DictoSyl(3146): java.net.SocketException: No route to host 06-12 11:17:32.887:
ERROR/DictoSyl(3146): at org.apache.harmony.luni.platform.OSNetworkSystem.connectSocketImpl
(Native Method) 06-12 11:17:32.887: ERROR/DictoSyl(3146): at org.apache.harmony.luni.platform.OSNetworkSystem.connect (OSNetworkSystem.java:125) 06-12 11:17:32.887: ERROR/DictoSyl(3146): at org.apache.harmony.luni.net.PlainSocketImpl.connect (PlainSocketImpl.java:227) 06-12
11:17:32.887: ERROR/DictoSyl(3146): at org.apache.harmony.luni.net.PlainSocketImpl.connect (PlainSocketImpl.java:199) 06-12
11:17:32.887: ERROR/DictoSyl(3146): at java.net.Socket.startupSocket(Socket.java:734) 06-12 11:17:32.887: ERROR/DictoSyl(3146): at java.net.Socket.<init> (Socket.java:157) 06-12 11:17:32.887: ERROR/DictoSyl(3146): at org.apache.commons.net.DefaultSocketFactory.createSocket (DefaultSocketFactory.java:53) 06-12
11:17:32.887: ERROR/DictoSyl(3146): at org.apache.commons.net.SocketClient.connect(SocketClient.java:162) 06-12
11:17:32.887: ERROR/DictoSyl(3146): at com.sylpheo.core.android.ftp.FtpManager.start(FtpManager.java:43)
or:
ERROR:
java.net.UnknownHostException: ftpsylpheo.sylpheo.com - ftpsylpheo.sylpheo.com at java.net.InetAddress.lookupHostByName(InetAddress.java:522) at java.net.InetAddress.getByName(InetAddress.java:336) at
java.net.Socket.<init>(Socket.java:155) at org.apache.commons.net.DefaultSocketFactory.createSocket (DefaultSocketFactory.java:53) at org.apache.commons.net.SocketClient.connect(SocketClient.java:162) at com.sylpheo.core.android.ftp.FtpManager.start(FtpManager.java:43)
It looks like having forgot something that makes connection down after several uses of my ftp program, but what? And why does this work quite well (but not always) with 3G/EDGE connection?
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try{
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static final String tableName="Employees";
static final String colID="EmployeeID";
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// TODO Auto-generated method stub
db.execSQL("CREATE TABLE "+tableName+" ("+colID+" INTEGER PRIMARY KEY AUTOINCREMENT, "+
colName+" TEXT, "+colAge+" Integer);");
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int [] to=new int [] {R.id.colName,R.id.colAge};
SimpleCursorAdapter sca=new SimpleCursorAdapter(this,R.layout.gridrow,c,from,to);
GridView grid=(GridView)findViewById(R.id.grid);
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