Android :: IOException Java.net.UnknownHostException - Host Is Unre Www.google.com:443
Jul 21, 2010
I have a method that I use to get the auth token for a user. I have been using it for months with no problem.
All of the sudden today it stated failing with: IOException java.net.UnknownHostException: Host is unresolved: www.google.com:443
The manifest contains <uses-permission android:name="android.permission.INTERNET" />
The code has not changed since it worked. It is:
CODE:...................
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Apr 16, 2009
I am getting UnknownHostException - host is unresolved in my app when trying to connect the emulator to server on my laptop(running on localhost).I have android.permission.INTERNET permission set in my AndroidMenifest.xml. Moreover, with this URL, I am able to connect to my machine's server when I use the browser on the emulator.Has anyone faced and solved such problem. If yes, I would really like to know the solution.
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Nov 20, 2009
Running Eclipse on Ubuntu 9.10, connected real HTC Dream which works just fine on another (Windows) machine.
CODE:.....................
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Sep 8, 2009
I am trying to write a sample program to record the video (say camcorder application). When i run my program using the emulator (I have android-sdk- windows-1.5_r3) I see java.io.IOException: prepare failed. error in logcat output.
Further I can see that I have came across this error when i call MediaRecorder.prepare() from CamcorderActivity.surfaceCreated() But I am surprised to see that activity got launched and I am seeing the camera preview! Again the preview is seen only in half of the screen! Its weird!!!
Further when i do recorder.start() to record the video I get java.lang.IllegalStateException. Yes this is obvious since the prepare () has failed. But the question is why prepare() has failed ?
Here is my code ... package com.example;
CODE:................
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Jul 20, 2010
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.
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Mar 18, 2010
Got IOException in android?
CODE:..............
why i got it?
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Apr 25, 2009
I'm trying to parse an XML file from res/raw or assets/ using the javax SAX parser. When the file is too large (~ 1MB), the parse(...) method throws an IOException without further information, such as message or inner exception. When I reduce file size to e. g. 600 kB, it's working again.
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Aug 7, 2010
I have just started with Android development, and facing one issue in the android application.
When application tries to read the data from file (raw resources), it throws IOException on readLine() function. code is as below:
CODE:.............
The reader.readLine() function is throwing the exception. Do I need to mention any kind of additional permission for reading the file?
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Jul 29, 2010
I am trying to get the geo codes for an address.
I am using: Geocoder geocoder = new Geocoder(GeoNoteEditor.this, Locale .getDefault()); List<Address> addressList = null; addressList = geocoder.getFromLocationName(addressString, 1);
The problem is that I am getting an IOException sometimes when I call getFromLocationName for the same addressString. This does not happen all the time. When I get the IOException, if I repeat the getFromLocation call, sometimes it works sometimes I get the IOException again.
How do I prevent the IOException from happening?
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Aug 13, 2009
I'm running into a strange problem while reading from an InputStream on the Android platform. I'm not sure if this is an Android specific issue, or something I'm doing wrong in general.
The only thing that is Android specific is this call:
CODE:........
This returns an InputStream for a file from the Android assets. Anyways, here's where I run into the issue:
CODE:........
When the read() executes it throws an IOException. The weird thing is that if I do two sequential single byte reads (or any number of single byte reads), there is no exception. Ie, this works:
CODE:........
Any idea why two sequential single byte reads work but one call to read both at once throws an exception? The InputStream seems fine... is.available() returns over a million bytes (as it should).
Stack trace shows these lines just before the InputStream.read():
CODE:........
Changing the buffer size to a single byte still throws the error. It looks like the exception is only raised when reading into a byte array.
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Jul 29, 2009
I'm trying to write a basic application with http get request. Eclipse validated my code, but when I using IOException in Android console I have this strange messages:
CODE:...............
And my application doesn't load into the emulator.
This is my code:
CODE:..................
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Jan 18, 2010
The code below works perfectly for real devices running on 1.5, 1.6 and 2.0 as well as the emulator running on 2.1. However, executing it on the Nexus One (running 2.1) raises an IOException:Code...
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May 31, 2010
I'm creating interactive charts in java for android environment. Google visualisation API is very impressive.
I need to know how to use it in java. Is there any Wrapper API available for this?
Or Can I use it directly in my application. Can anyone post a code snippet for the same.
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Apr 21, 2010
I'm able to discover devices which r bluetooth ON from my application. But when i try to connect using the Bluetoothsocket's connect() method, I'm getting an IOException: Connection refused.
I'm using the following UUID private static final UUID MY_UUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");
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Oct 26, 2010
I am trying to upload a image file to server and get back a JSON Object. But an IOException was thrown out. Following is my codes, can anybody have a look at them?
CODE:.....................
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Feb 15, 2010
I'm using Windows 7 Ultimate 64 bit edition and Eclipse 3.5 with the Android plugin. Every time I create a new project and try to publish it, I get an error like this:
CODE:............
The emulator is working perfectly, adb can see it, I can even logcat from it, but it can't push or pull anything from it. Nothing appears in logcat to suggest the emulator even received any command. It doesn't matter if I have the Firewall on or off, or if I try invoking adb install to bypass the plugin. Nothing works even with a blank app.
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Oct 5, 2010
I am getting this log COntiniously in my class, Can any body suggest me how to handle this SSLSocketIMpl handshake in 2.1,
I found that this is known issue in froyo. 8558.
CODE:...............
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Aug 6, 2009
What is the preferred way of reusing a MediaPlayer when using resources? My try looks a bit ... too complicated... so maybe I should be happy to see that it didn't work. (I run the Android 1.5 SDK and emulator.)
According to this thread my problem may be a permission problem. http://groups.google.se/group/android-developers/browse_thread/thread...
I get the same error. But in my case it only occurs when I use FileDescriptor!?! The use case differs however, because I use a resource stored in the bundle. I have s0.mp3 safely stored in the project /res/raw and it successfully plays when I use SoundPool or MediaPlayer.create. And the log print tells me I referenced the correct file and stay safely in my package.
I'm sure my way of getting the fd out from a package resource is the problem, I didn't find any other way... But why didn't setDataSource throw the exception instead of a printout? And why on earth is the same resource happily played one way but not the other? Seems like a design flaw rather than a security raise. Should I look in the MediaPlayer.create code to see how they get around the problem or can you help me understand how it works?
This is a test code snippet: (from onCreate of a simple Activity)
CODE:...........
And the error:
CODE;..............
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Dec 10, 2009
Is there someone troubled the same issue.
The code in run.
CODE:.............
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Jan 17, 2010
What is the best (meaning: most popular) UI Java markup language for designing applications for Google Android?
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Apr 19, 2010
I've got 2 GeoPoints given to show them on the map with markers... so far so good...
how can I get the optimum zoom level for the MapController in order to focus the middle of both points, but also have them on the map.
The whole thing should work at different screen resolutions. Sorry for asking that silly question, I know thats not very difficult, but at the moment my head is boiling..
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Aug 31, 2009
I am trying to send a GET via Android's HttpURLConnection (which is an org.apache.harmony.luni.internal.net.www.protocol.http.HttpURLConnection), and upon receiving the response, an IOException is thrown:
in doRequestInternal(): "Received authentication challenge is null"
What does this error mean, and what is causing this? I am writing OAuth parameters to the Authorization header, but I do this on other occasions, too, without problems.
CODE:.............................
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Jun 17, 2010
Every time I try to run an Android project from Eclipse with the Android plugin (Run -> Run), the emulator starts up just fine, but the upload fails, and the Console puts out this error message:
[2010-06-17 08:17:55 - HelloAndroid] Failed to upload HelloAndroid.apk on device 'emulator-5554'
[2010-06-17 08:17:55 - HelloAndroid] java.io.IOException: Unable to upload file: Local file doesn't exist.
[2010-06-17 08:17:55 - HelloAndroid] Launch canceled!
It seems as though the apk compilation is failing, but there are no other errors in the Console at all except for a lone warning about the project not specifying an API Level requirement:
[2010-06-17 08:17:55 - HelloAndroid] WARNING: Application does not specify an API level requirement!
[2010-06-17 08:17:55 - HelloAndroid] Device API version is 8 (Android 2.2)
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May 19, 2010
i have two files
App.java
Gallery.java
App. java contains frontend buttons and functionalities Gallery.java lists the imagesin the sd card. i want to call Gallery.java in click event in app.java
App.java
package gallery.display;
import android.app.Activity;
import android.os.Bundle;
import android.view.View.OnClickListener;
import android.view.View;...........
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Mar 16, 2009
I'm trying to call a java method from javascript using addJavascriptInterface(); but seems does not work, it always display "failure"; java code...
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May 29, 2009
My calls to getFromLocationName() always fail the "first" time I start my app. I catch the IOException which has reason:
Unable to parse response from server
Then I make a second call and it succeeds. Once things are "awake" all future calls to getFromLocationName() succeed, it's just that first one, and there is a ton of latency.
I haven't run this on a device yet, just in the emulator. This seems like a network problem, but it is so reproducible I'm thinking I'm not initializing something properly. I'm using Android SDK 1.1.
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Aug 10, 2010
I am developing an Android application consisting of 4 tabs. On the first tab I have a button, which again calls an Activity called ActivityA.When my ActiviyA is started, the tab control is not shown anymore.
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Jul 6, 2010
Im getting a IOExeption 'Host is unresolved' on HttpPost. The Endpoint in this case a a computer on my LAN with a webservice. Im using WIFI to my LAN. Does Android know to to resolved computernames?
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Jul 2, 2010
I want to create tabs without extending TabActivity. (The reason is that TabActivity cannot handle a custom titlebar as it seems). I have public class startTab extends Activity I read somewhere that I have to use a LocalActivityManager, I assume that I am missing something there. Anyone an idea?
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Mar 15, 2010
I'm having problems during the "read" call of the InputStream. The call gives me a "IOException: Software Caused Abort" exception. I'm able to get the BluetoothSocket and also the able to "connect" to the device. My app. is in the client mode and sends in a "x" byte "command" to the device which is then supposed to send me a "response". The expected "response" is also of "x" bytes. This is where the error arises.. While reading the "response" i'm getting the above mentioned error.
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