AsyncTask中的android.os.NetworkOnMainThreadException

Question

我建立一个应用程序,我得到一个NetworkOnMainThreadException INSIDE的的AsyncTask

呼叫:

new POST(this).execute("");

的AsyncTask:

public class POST extends AsyncTask<String, Integer, HttpResponse>{
private MainActivity form;
public POST(MainActivity form){
    this.form = form;
}


@Override
protected HttpResponse doInBackground(String... params) {
try {
        HttpPost httppost = new HttpPost("http://diarwe.com:8080/account/login");
    List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(3);
    nameValuePairs.add(new BasicNameValuePair("email",((EditText)form.findViewById(R.id.in_email)).getText().toString()));
    //add more...
    httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
    return new DefaultHttpClient().execute(httppost);
} catch (Exception e) {
    Log.e("BackgroundError", e.toString());
}
return null;
}

@Override
protected void onPostExecute(HttpResponse result) {
super.onPostExecute(result);
try {
    Gson gSon = new GsonBuilder().setDateFormat("yyyy-MM-dd'T'HH:mm:ss").create();
    gSon.fromJson(IOUtils.toString(result.getEntity().getContent()), LogonInfo.class).fill(form);
} catch (Exception e) {
    Log.e("BackgroundError", e.toString());
}
}
}

logcat的:

BackgroundError | android.os.NetworkOnMainThreadException

我很困惑为什么在异步任务的doInBackground中的do中抛出这个异常,任何想法？

Answer 1

将JSON代码移动到doInBackground():

@Override
protected HttpResponse doInBackground(String... params) {
    ...
    Your current HttpPost code...
    ...
    Gson gSon = new GsonBuilder().setDateFormat("yyyy-MM-dd'T'HH:mm:ss").create();
    gSon.fromJson(IOUtils.toString(result.getEntity().getContent()), LogonInfo.class).fill(form);
    ...
}