I have get UnknownHostException every time, This is my part of code:
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
HttpResponse httpResponse = httpClient.execute(httpPost);
HttpEntity httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
I have got exception on line no 3,
I have restart my Wifi connection. I have also used my data plan. I have also try with HttpGet class instead of HttpPost The url is work perfectly on the browser
I cant understand, What is the actual cause, Pls help me...
This is logcat o/p:-
02-10 22:41:33.307: W/System.err(16016): java.net.UnknownHostException: Unable to resolve host "www.offerpunch.com": No address associated with hostname
02-10 22:41:33.317: W/System.err(16016): at java.net.InetAddress.lookupHostByName(InetAddress.java:424)
02-10 22:41:33.317: W/System.err(16016): at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236)
02-10 22:41:33.317: W/System.err(16016): at java.net.InetAddress.getAllByName(InetAddress.java:214)
02-10 22:41:33.317: W/System.err(16016): at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:141)
02-10 22:41:33.317: W/System.err(16016): at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164)
02-10 22:41:33.317: W/System.err(16016): at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119)
02-10 22:41:33.317: W/System.err(16016): at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:360)
02-10 22:41:33.317: W/System.err(16016): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555)
02-10 22:41:33.317: W/System.err(16016): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
02-10 22:41:33.317: W/System.err(16016): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465)
02-10 22:41:33.317: W/System.err(16016): at com.android.offerpunch.util.JSONParserForArray.getJSONFromUrl(JSONParserForArray.java:38)
02-10 22:41:33.317: W/System.err(16016): at com.android.offerpunch.SearchResultActivity$OffersList.doInBackground(SearchResultActivity.java:103)
02-10 22:41:33.317: W/System.err(16016): at com.android.offerpunch.SearchResultActivity$OffersList.doInBackground(SearchResultActivity.java:1)
02-10 22:41:33.317: W/System.err(16016): at android.os.AsyncTask$2.call(AsyncTask.java:287)
02-10 22:41:33.317: W/System.err(16016): at java.util.concurrent.FutureTask.run(FutureTask.java:234)
02-10 22:41:33.317: W/System.err(16016): at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
02-10 22:41:33.317: W/System.err(16016): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
02-10 22:41:33.317: W/System.err(16016): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
02-10 22:41:33.317: W/System.err(16016): at java.lang.Thread.run(Thread.java:856)
02-10 22:41:33.327: W/System.err(16016): Caused by: libcore.io.GaiException: getaddrinfo failed: EAI_NODATA (No address associated with hostname)
02-10 22:41:33.327: W/System.err(16016): at libcore.io.Posix.getaddrinfo(Native Method)
02-10 22:41:33.327: W/System.err(16016): at libcore.io.ForwardingOs.getaddrinfo(ForwardingOs.java:59)
02-10 22:41:33.327: W/System.err(16016): at java.net.InetAddress.lookupHostByName(InetAddress.java:405)
02-10 22:41:33.327: W/System.err(16016): ... 18 more
02-10 22:41:33.327: E/Buffer Error(16016): Error converting result java.lang.NullPointerException: lock == null
02-10 22:41:33.327: E/JSON Parser(16016): Error parsing data org.json.JSONException: End of input at character 0 of
02-10 22:41:33.337: W/dalvikvm(16016): threadid=12: thread exiting with uncaught exception (group=0x41458ae0)
02-10 22:41:33.337: E/AndroidRuntime(16016): FATAL EXCEPTION: AsyncTask #2
02-10 22:41:33.337: E/AndroidRuntime(16016): java.lang.RuntimeException: An error occured while executing doInBackground()
02-10 22:41:33.337: E/AndroidRuntime(16016): at android.os.AsyncTask$3.done(AsyncTask.java:299)
02-10 22:41:33.337: E/AndroidRuntime(16016): at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:352)
02-10 22:41:33.337: E/AndroidRuntime(16016): at java.util.concurrent.FutureTask.setException(FutureTask.java:219)
02-10 22:41:33.337: E/AndroidRuntime(16016): at java.util.concurrent.FutureTask.run(FutureTask.java:239)
02-10 22:41:33.337: E/AndroidRuntime(16016): at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
02-10 22:41:33.337: E/AndroidRuntime(16016): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
02-10 22:41:33.337: E/AndroidRuntime(16016): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
02-10 22:41:33.337: E/AndroidRuntime(16016): at java.lang.Thread.run(Thread.java:856)
02-10 22:41:33.337: E/AndroidRuntime(16016): Caused by: java.lang.NullPointerException
02-10 22:41:33.337: E/AndroidRuntime(16016): at com.android.offerpunch.SearchResultActivity$OffersList.doInBackground(SearchResultActivity.java:104)
02-10 22:41:33.337: E/AndroidRuntime(16016): at com.android.offerpunch.SearchResultActivity$OffersList.doInBackground(SearchResultActivity.java:1)
02-10 22:41:33.337: E/AndroidRuntime(16016): at android.os.AsyncTask$2.call(AsyncTask.java:287)
02-10 22:41:33.337: E/AndroidRuntime(16016): at java.util.concurrent.FutureTask.run(FutureTask.java:234)
02-10 22:41:33.337: E/AndroidRuntime(16016): ... 4 more
Make sure the url string that you pass to HttpPost begins with http://
EDIT: I was able to perform a request with below code sample (notice the http prefix)
private void httpStuff() {
new AsyncTask<Void, Void, String>() {
@Override
protected String doInBackground(Void... params) {
BufferedReader reader = null;
try {
String url = "http://www.offerpunch.com/parser/index.php/deals?SR=1&cat_id=&SRcat_id=&SRkeyword=hddhh&deal_city=&deal_area=";
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
HttpResponse httpResponse = httpClient.execute(httpPost);
HttpEntity httpEntity = httpResponse.getEntity();
InputStream is = httpEntity.getContent();
reader = new BufferedReader(new InputStreamReader(is));
StringBuilder total = new StringBuilder();
String line;
while ((line = reader.readLine()) != null) {
total.append(line);
}
return total.toString();
} catch (ClientProtocolException ex) {
Log.e("LOG_TAG", null, ex);
} catch (IOException ex) {
Log.e("LOG_TAG", null, ex);
} finally {
if (reader != null) {
try {
reader.close();
} catch (IOException ex) {
}
}
}
return null;
}
protected void onPostExecute(String result) {
if (result == null) {
Log.d("LOG_TAG", "Result is null");
} else {
Log.d("LOG_TAG", "Result size: " + result.length());
Log.d("LOG_TAG", result);
}
};
}.execute();
}
The result is a huge string (~900k length), I am not even sure the user can actually understand the parsed data ... but that's off-topic.
In your case, I believe you either put the Internet permission in a wrong place as noted here, or you're running the app on a crappy emulator, or you simply don't have connectivity on the device that you're running the app.
One more thing: that NullPointerException that you get is because you assume the result is correct from server side. Make sure you have not-null checks before parsing ...