Читайте входной поток onMainThreadException Android

Question

Я пытаюсь получить информацию от моего сервера, поэтому я отправить запрос, чтобы получить ответ:

private InputStream getInputStreamFromUrl(String url) { 
    InputStream content = null; 
    try { 
     HttpClient httpclient = new DefaultHttpClient(); 
     HttpResponse response = httpclient.execute(new HttpGet(url)); 
     content = response.getEntity().getContent(); 
    } catch (Exception e) { 
     Log.v(TAG, "Network exception", e); 
    } 
    return content; 
} 

Я создаю задачу асинхронной подготовить мой запрос

public class HttpRequestTask extends AsyncTask<Request, Integer, Request[]> 
{ 
HttpRequestTaskListner httpRequestTaskListner; 

public void setHttpRequestTaskListner(HttpRequestTaskListner httpRequestTaskListner){ 
    this.httpRequestTaskListner = httpRequestTaskListner; 
} 

protected Request[] doInBackground(Request...requests){ 
    for(int i = 0; i<requests.length; i++){ 
     requests[i].execute(); 
    } 
    return requests; 
} 

protected void onPostExecute(Request[] requests){ 
    if(requests != null){ 
     httpRequestTaskListner.httpRequestTaskSuccess(requests); 
    } 
    else{ 
     httpRequestTaskListner.HttpRequestTaskFailed(); 
    } 
} 

public static interface HttpRequestTaskListner{ 
    void httpRequestTaskSuccess(Request[] requests); 
    void HttpRequestTaskFailed(); 
} 
} 

и я исполню мой запрос

public void register(final ResultListner resultListner) 
{ 

    //define url 
    String url = webServiceUrl; 
    url += prop.getProperty("register"); 
    //TODO change mobile id 
    url += "?mobile_id=test"; 
    url += "&app_id="+prop.getProperty("applicationId"); 

    //send request 
    Request request = new Request(url); 
    HttpRequestTask httpRequestTask = new HttpRequestTask(); 
    httpRequestTask.setHttpRequestTaskListner(new HttpRequestTaskListner() { 



     @Override 
     public void httpRequestTaskSuccess(Request[] requests) { 
      resultListner.onResultSuccess(requests); 
     } 

     @Override 
     public void HttpRequestTaskFailed() { 
      resultListner.onResultFail(); 
     } 
    }); 
    httpRequestTask.execute(request); 
} 

Для завершения я использую код в моей деятельности

Server server = new Server(getApplicationContext()); 
    server.register(new ResultListner() { 

     @Override 
     public void onResultSuccess(Request[] request) { 
      InputStream is = request[0].getResult(); 
      String result = Util.getStringFromInputStream(is); 
      if(result.equals(Server.REGISTER_SUCCESS)){ 
       System.out.println("aa"); 
      } 
      else{ 
       //TODO register error 
      } 
     } 

     @Override 
     public void onResultFail() { 
      // TODO fail request 
     } 
    }); 

А иногда я получил OnMainTheradException Но я не знаю, почему иногда это работает, и иногда я получил исключение это очень странно

Log:

08-24 17:00:35.630: E/AndroidRuntime(7265): FATAL EXCEPTION: main 
08-24 17:00:35.630: E/AndroidRuntime(7265): android.os.NetworkOnMainThreadException 
08-24 17:00:35.630: E/AndroidRuntime(7265):  at  android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1118) 
08-24 17:00:35.630: E/AndroidRuntime(7265):  at  libcore.io.BlockGuardOs.recvfrom(BlockGuardOs.java:163) 
08-24 17:00:35.630: E/AndroidRuntime(7265):  at  libcore.io.IoBridge.recvfrom(IoBridge.java:513) 
08-24 17:00:35.630: E/AndroidRuntime(7265):  at java.net.PlainSocketImpl.read(PlainSocketImpl.java:488) 
08-24 17:00:35.630: E/AndroidRuntime(7265):  at java.net.PlainSocketImpl.access$000(PlainSocketImpl.java:46) 
08-24 17:00:35.630: E/AndroidRuntime(7265):  at java.net.PlainSocketImpl$PlainSocketInputStream.read(PlainSocketImpl.java:240) 
08-24 17:00:35.630: E/AndroidRuntime(7265):  at org.apache.http.impl.io.AbstractSessionInputBuffer.fillBuffer(AbstractSessionInputBuffer.java:103) 
08-24 17:00:35.630: E/AndroidRuntime(7265):  at org.apache.http.impl.io.AbstractSessionInputBuffer.readLine(AbstractSessionInputBuffer.java:191) 
08-24 17:00:35.630: E/AndroidRuntime(7265):  at org.apache.http.impl.io.ChunkedInputStream.getChunkSize(ChunkedInputStream.java:220) 
08-24 17:00:35.630: E/AndroidRuntime(7265):  at org.apache.http.impl.io.ChunkedInputStream.nextChunk(ChunkedInputStream.java:183) 
08-24 17:00:35.630: E/AndroidRuntime(7265):  at org.apache.http.impl.io.ChunkedInputStream.read(ChunkedInputStream.java:155) 
08-24 17:00:35.630: E/AndroidRuntime(7265):  at org.apache.http.conn.EofSensorInputStream.read(EofSensorInputStream.java:159) 
08-24 17:00:35.630: E/AndroidRuntime(7265):  at java.io.InputStreamReader.read(InputStreamReader.java:244) 
08-24 17:00:35.630: E/AndroidRuntime(7265):  at java.io.Reader.read(Reader.java:145) 
08-24 17:00:35.630: E/AndroidRuntime(7265):  at java.io.Reader.read(Reader.java:258) 
08-24 17:00:35.630: E/AndroidRuntime(7265):  at java.util.Scanner.readMore(Scanner.java:2137) 
08-24 17:00:35.630: E/AndroidRuntime(7265):  at java.util.Scanner.findPostDelimiter(Scanner.java:2107) 
08-24 17:00:35.630: E/AndroidRuntime(7265):  at java.util.Scanner.setTokenRegion(Scanner.java:2017) 
08-24 17:00:35.630: E/AndroidRuntime(7265):  at java.util.Scanner.next(Scanner.java:1004) 
08-24 17:00:35.630: E/AndroidRuntime(7265):  at java.util.Scanner.next(Scanner.java:980) 
08-24 17:00:35.630: E/AndroidRuntime(7265):  at com.easyapp.util.Util.getStringFromInputStream(Util.java:27) 
08-24 17:00:35.630: E/AndroidRuntime(7265):  at com.easyapp.application.MainActivity$1.onResultSuccess(MainActivity.java:31) 
08-24 17:00:35.630: E/AndroidRuntime(7265):  at com.easyapp.server.Server$1.httpRequestTaskSuccess(Server.java:49) 
08-24 17:00:35.630: E/AndroidRuntime(7265):  at com.easyapp.server.HttpRequestTask.onPostExecute(HttpRequestTask.java:22) 
08-24 17:00:35.630: E/AndroidRuntime(7265):  at com.easyapp.server.HttpRequestTask.onPostExecute(HttpRequestTask.java:1) 
08-24 17:00:35.630: E/AndroidRuntime(7265):  at android.os.AsyncTask.finish(AsyncTask.java:631) 
08-24 17:00:35.630: E/AndroidRuntime(7265):  at android.os.AsyncTask.access$600(AsyncTask.java:177) 
08-24 17:00:35.630: E/AndroidRuntime(7265):  at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:644) 
08-24 17:00:35.630: E/AndroidRuntime(7265):  at android.os.Handler.dispatchMessage(Handler.java:99) 
08-24 17:00:35.630: E/AndroidRuntime(7265):  at android.os.Looper.loop(Looper.java:137) 
08-24 17:00:35.630: E/AndroidRuntime(7265):  at android.app.ActivityThread.main(ActivityThread.java:4895) 
08-24 17:00:35.630: E/AndroidRuntime(7265):  at java.lang.reflect.Method.invokeNative(Native Method) 
08-24 17:00:35.630: E/AndroidRuntime(7265):  at java.lang.reflect.Method.invoke(Method.java:511) 
08-24 17:00:35.630: E/AndroidRuntime(7265):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:994) 
08-24 17:00:35.630: E/AndroidRuntime(7265):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:761) 
08-24 17:00:35.630: E/AndroidRuntime(7265):  at dalvik.system.NativeStart.main(Native Method) 

Ошибка Util. Java на линии 27 является

public static String getStringFromInputStream(InputStream is) 
{ 
    if(is == null){ 
     return null; 
    } 

    return new Scanner(is,"UTF-8").useDelimiter("\\A").next(); 
} 

на

return new Scanner(is,"UTF-8").useDelimiter("\\A").next(); 

Answer 1

Я думаю android.os.NetworkOnMainThreadException решение является ....

Добавить:

StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build(); 

StrictMode.setThreadPolicy(policy); 

в своем классе,

и

ADD это ManiFestFile:

<uses-permission android:name="android.permission.INTERNET"/> 

Answer 2

1. Не используйте StrictMode (только в режиме отладки)
2. Не изменять SDK версии

Используйте Услуги или AsyncTask

good tutorial, чтобы помочь вам начать работу.