android.os.NetworkOnMainThreadException. The exception that is thrown when an application attempts to perform a networking operation on its main thread. This is only thrown for applications targeting the Honeycomb SDK or higher.
os. NetworkOnMainThreadException. Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project. Step 2 − Add the following code to res/layout/activity_main.
Go to Settings > Developer options. Tap Advanced > Strict mode enabled.
NetworkOnMainThreadException: The exception that is thrown when an application attempts to perform a networking operation on its main thread.
You should call sendfeedback method on asynctask then only above code will work. As webserver is taking lot of time to response main thread becomes unresponsive. To avoid it you should call it on another thread. Hence asynctask is better.
here is link that illustrates how to use asynctask
NetworkOnMainThreadException is thrown when your app tries networking operation in main thread.
To fix that you can use a private inner class within your Activity that extends android.os.AsyncTask<Params, Progress, Result>
which will do the server call stuffs.
Something as,
private class SendfeedbackJob extends AsyncTask<String, Void, String> {
@Override
protected String doInBackground(String[] params) {
// do above Server call here
return "some message";
}
@Override
protected void onPostExecute(String message) {
//process message
}
}
And then invoke above class from submit.setOnClickListener
as below,
SendfeedbackJob job = new SendfeedbackJob();
job.execute(pass, email);
AsyncTask doc
AsyncTask Android example
if (android.os.Build.VERSION.SDK_INT > 9) {
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
}
try
{
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("myUrl");
// no idea what this does :)
httppost.setEntity(new UrlEncodedFormEntity(postParameters));
// This is the line that send the request
HttpResponse response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
InputStream is = entity.getContent();
}
catch (Exception e)
{
Log.e("log_tag", "Error in http connection "+e.toString());
}
Here is your problem. Since api 11, this exception will inform you that you are running long tasks on the ui thread (the http communication in your class), and according with the new StrictGuard policy this is not possibile. So you have two different choice
You made network call on main thread which is against to android rules, so you have to do your network call on separate thread like asynctask or handler etc.
You can just create Async class as below
class Retrievedata extends AsyncTask<String, Void, String> {
@Override
protected String doInBackground(String... params) {
try{
//Your code
}
return null;
}
}
You can just put your all code inside doInBackground method
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