Shigri
Reputation: 33
Getting Exception at HttpConnection.connect() android
Getting Excception at httpConn.connect(); (the 5th last line of the code) Code and Exeption Errors are given below..I an trying to connect the android application to internet..I got this code from internet..but it is giving exception..The code is completely given bewlow..i have added permission to manifest already i dont know what is te erroe
Code..
public class httpsData extends Activity {
ImageView img;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
String str = DownloadText("http://www.edumobile.org/android/");
TextView txt = (TextView) findViewById(R.id.text);
txt.setText(str);
}
private String DownloadText(String URL)
{ Log.v("Wasim ","11");
int BUFFER_SIZE = 2000;
InputStream in = null;
try {
in = OpenHttpConnection(URL);
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
return "";
}
InputStreamReader isr = new InputStreamReader(in);
int charRead;
String str = "";
char[] inputBuffer = new char[BUFFER_SIZE];
try {
while ((charRead = isr.read(inputBuffer))>0)
{
//---convert the chars to a String---
String readString = String.copyValueOf(inputBuffer, 0, charRead);
str += readString;
inputBuffer = new char[BUFFER_SIZE];
}
in.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return "";
}
return str;
}
private InputStream OpenHttpConnection(String urlString)
throws IOException
{
InputStream in = null;
int response = -1;
URL url = new URL(urlString);
URLConnection conn = url.openConnection();
if (!(conn instanceof HttpURLConnection))
{
throw new IOException("Not an HTTP connection");
}
HttpURLConnection httpConn = (HttpURLConnection) conn;
httpConn.setAllowUserInteraction(false);
httpConn.setInstanceFollowRedirects(true);
httpConn.setRequestMethod("GET");
httpConn.connect();
response = httpConn.getResponseCode();
if (response == HttpURLConnection.HTTP_OK) {
in = httpConn.getInputStream();
}
return in;
}
}
Error are these:
12-04 14:57:34.947: E/AndroidRuntime(5851): FATAL EXCEPTION: main
12-04 14:57:34.947: E/AndroidRuntime(5851): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.apps.httpsData/com.apps.httpsData.httpsData}: android.os.NetworkOnMainThreadException
12-04 14:57:34.947: E/AndroidRuntime(5851): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059)
12-04 14:57:34.947: E/AndroidRuntime(5851): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
12-04 14:57:34.947: E/AndroidRuntime(5851): at android.app.ActivityThread.access$600(ActivityThread.java:130)
12-04 14:57:34.947: E/AndroidRuntime(5851): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
12-04 14:57:34.947: E/AndroidRuntime(5851): at android.os.Handler.dispatchMessage(Handler.java:99)
12-04 14:57:34.947: E/AndroidRuntime(5851): at android.os.Looper.loop(Looper.java:137)
12-04 14:57:34.947: E/AndroidRuntime(5851): at android.app.ActivityThread.main(ActivityThread.java:4745)
12-04 14:57:34.947: E/AndroidRuntime(5851): at java.lang.reflect.Method.invokeNative(Native Method)
12-04 14:57:34.947: E/AndroidRuntime(5851): at java.lang.reflect.Method.invoke(Method.java:511)
12-04 14:57:34.947: E/AndroidRuntime(5851): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
12-04 14:57:34.947: E/AndroidRuntime(5851): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
12-04 14:57:34.947: E/AndroidRuntime(5851): at dalvik.system.NativeStart.main(Native Method)
12-04 14:57:34.947: E/AndroidRuntime(5851): Caused by: android.os.NetworkOnMainThreadException
12-04 14:57:34.947: E/AndroidRuntime(5851): at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1117)
12-04 14:57:34.947: E/AndroidRuntime(5851): at java.net.InetAddress.lookupHostByName(InetAddress.java:385)
12-04 14:57:34.947: E/AndroidRuntime(5851): at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236)
12-04 14:57:34.947: E/AndroidRuntime(5851): at java.net.InetAddress.getAllByName(InetAddress.java:214)
12-04 14:57:34.947: E/AndroidRuntime(5851): at libcore.net.http.HttpConnection.<init>(HttpConnection.java:70)
12-04 14:57:34.947: E/AndroidRuntime(5851): at libcore.net.http.HttpConnection.<init>(HttpConnection.java:50)
12-04 14:57:34.947: E/AndroidRuntime(5851): at libcore.net.http.HttpConnection$Address.connect(HttpConnection.java:341)
12-04 14:57:34.947: E/AndroidRuntime(5851): at libcore.net.http.HttpConnectionPool.get(HttpConnectionPool.java:87)
12-04 14:57:34.947: E/AndroidRuntime(5851): at libcore.net.http.HttpConnection.connect(HttpConnection.java:128)
12-04 14:57:34.947: E/AndroidRuntime(5851): at libcore.net.http.HttpEngine.openSocketConnection(HttpEngine.java:315)
12-04 14:57:34.947: E/AndroidRuntime(5851): at libcore.net.http.HttpEngine.connect(HttpEngine.java:310)
12-04 14:57:34.947: E/AndroidRuntime(5851): at libcore.net.http.HttpEngine.sendSocketRequest(HttpEngine.java:289)
12-04 14:57:34.947: E/AndroidRuntime(5851): at libcore.net.http.HttpEngine.sendRequest(HttpEngine.java:239)
12-04 14:57:34.947: E/AndroidRuntime(5851): at libcore.net.http.HttpURLConnectionImpl.connect(HttpURLConnectionImpl.java:80)
12-04 14:57:34.947: E/AndroidRuntime(5851): at com.apps.httpsData.httpsData.OpenHttpConnection(httpsData.java:97)
12-04 14:57:34.947: E/AndroidRuntime(5851): at com.apps.httpsData.httpsData.DownloadText(httpsData.java:42)
12-04 14:57:34.947: E/AndroidRuntime(5851): at com.apps.httpsData.httpsData.onCreate(httpsData.java:30)
12-04 14:57:34.947: E/AndroidRuntime(5851): at android.app.Activity.performCreate(Activity.java:5008)
12-04 14:57:34.947: E/AndroidRuntime(5851): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
12-04 14:57:34.947: E/AndroidRuntime(5851): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2023)
12-04 14:57:34.947: E/AndroidRuntime(5851): ... 11 more
Upvotes: 1
Views: 2274
Answers (3)
Hariharan
Reputation: 24853
Try this..
TextView txt;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
txt = (TextView) findViewById(R.id.text);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB)
new DownloadText("http://www.edumobile.org/android/").executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, new String[]{null});
else
new DownloadText("http://www.edumobile.org/android/").execute(new String[]{null});
}
public class DownloadText extends AsyncTask<String, Void, String> {
// variables passed in:
String urls;
// constructor
public DownloadText(String urls) {
this.urls = urls;
}
@Override
protected void onPreExecute() {
pDialog = ProgressDialog.show(httpsData.this, "Fetching Details..", "Please wait...", true);
}
@Override
protected String doInBackground(String... params) {
// TODO Auto-generated method stub
int BUFFER_SIZE = 2000;
InputStream in = null;
try {
InputStream in = null;
int response = -1;
URL url = new URL(urls);
URLConnection conn = url.openConnection();
if (!(conn instanceof HttpURLConnection))
{
throw new IOException("Not an HTTP connection");
}
HttpURLConnection httpConn = (HttpURLConnection) conn;
httpConn.setAllowUserInteraction(false);
httpConn.setInstanceFollowRedirects(true);
httpConn.setRequestMethod("GET");
httpConn.connect();
response = httpConn.getResponseCode();
if (response == HttpURLConnection.HTTP_OK) {
in = httpConn.getInputStream();
}
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
return "";
}
InputStreamReader isr = new InputStreamReader(in);
int charRead;
String str = "";
char[] inputBuffer = new char[BUFFER_SIZE];
try {
while ((charRead = isr.read(inputBuffer))>0)
{
//---convert the chars to a String---
String readString = String.copyValueOf(inputBuffer, 0, charRead);
str += readString;
inputBuffer = new char[BUFFER_SIZE];
}
in.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return "";
}
}
@Override
protected void onPostExecute(String result) {
// Now we have your JSONObject, play around with it.
if (pDialog.isShowing())
pDialog.dismiss();
if(!result.equals(""))
txt.setText(result);
}
}
Upvotes: 0
nitesh
Reputation: 421
you have to use asynch task for this purpose. To execute Server class use these code in your method from where you want to call HTTP CONNECTION----------- Server downloadFile = new Server(); downloadFile.execute();
class Server extends AsyncTask<String, Integer, String> {
@Override
protected String doInBackground(String... arg0) {
// TODO Auto-generated method stub
try{
ArrayList<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
HttpClient httpclient = new DefaultHttpClient();
//link
String adad="http://"+iP+"/"+faCility+"/distt.php";
HttpPost httppost = new HttpPost(adad);
nameValuePairs.add(new BasicNameValuePair(uSername,pAssword));
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
response = httpclient.execute(httppost);
if(response !=null)
{
HttpEntity entityy = response.getEntity();
is = entityy.getContent();
}
}catch(Exception e){
Log.e("log_tag", "Error in http connection"+e.toString());
}
//convert response to string
if(is !=null){
try{//StringBuilder sb = new StringBuilder();
BufferedReader reader = new BufferedReader(new InputStreamReader(is,"iso-8859-1"),8);
System.out.println("66666666666666");
//todo your work here with "is"
sb = new StringBuilder();
sb.append(reader.readLine() + "\n");
System.out.println("77777777777");
String line="0";
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
is.close();
System.out.println("88888888888888");
System.out.println(sb);
result=sb.toString();
System.out.println("---------------------------------"+result+"---------------------");
System.out.println("9999999999999999999");
}catch(Exception e){
Log.e("log_tag", "Error converting result "+e.toString());
}
}
return result;
}
protected void onPostExecute(String resultt)
{
}
}
Upvotes: 0
Divya Motiwala
Reputation: 1669
You cannot execute HTTP connect request on main thread.
Use an Async Task and perform http request in doInBackground() method.
Upvotes: 4
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