Загрузка файла на вопросы сервера в Android

Question

У меня есть код для загрузки файлов на сервер его код работающего человека, но это реализовано в моем приложении его Гот исключение всего времени

вот мой код

public int uploadFile(String sourceFileUri) { 
    String fileName = sourceFileUri; 

    HttpURLConnection conn = null; 
    DataOutputStream dos = null; 
    String lineEnd = "\r\n"; 
    String twoHyphens = "--"; 
    String boundary = "*****"; 
    int bytesRead, bytesAvailable, bufferSize; 
    byte[] buffer; 
    int maxBufferSize = 1 * 1024 * 1024; 
    File sourceFile = new File(sourceFileUri); 

    if (!sourceFile.isFile()) { 

     // dialog.dismiss(); 

     Log.e("uploadFile", "Source File not exist :" 
       + selectedFilePath); 

     runOnUiThread(new Runnable() { 
      public void run() { 
       // messageText.setText("Source File not exist :" 
         // + selectedFilePath); 
      } 
     }); 

     return 0; 

    } else { 
     int serverResponseCode = 0; 

     try { 

      // open a URL connection to the Servlet 
      FileInputStream fileInputStream = new FileInputStream(sourceFile); 
      URL url = new URL(uploadurl); 

      // Open a HTTP connection to the URL 
      conn = (HttpURLConnection) url.openConnection(); 
      conn.setDoInput(true); // Allow Inputs 
      conn.setDoOutput(true); // Allow Outputs 
      conn.setUseCaches(false); // Don't use a Cached Copy 
      conn.setRequestMethod("POST"); 
      conn.setRequestProperty("Connection", "Keep-Alive"); 
      conn.setRequestProperty("ENCTYPE", "multipart/form-data"); 
      conn.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + boundary); 
      conn.setRequestProperty("userfile", fileName); 

      dos = new DataOutputStream(conn.getOutputStream()); 

      dos.writeBytes(twoHyphens + boundary + lineEnd); 
      dos.writeBytes("Content-Disposition: form-data; name=\"userfile\";filename=\"" 
        + fileName + "\"" + lineEnd); 

      dos.writeBytes(lineEnd); 

      // create a buffer of maximum size 
      bytesAvailable = fileInputStream.available(); 

      bufferSize = Math.min(bytesAvailable, maxBufferSize); 
      buffer = new byte[bufferSize]; 

      // read file and write it into form... 
      bytesRead = fileInputStream.read(buffer, 0, bufferSize); 

      while (bytesRead > 0) { 

       dos.write(buffer, 0, bufferSize); 
       bytesAvailable = fileInputStream.available(); 
       bufferSize = Math.min(bytesAvailable, maxBufferSize); 
       bytesRead = fileInputStream.read(buffer, 0, bufferSize); 

      } 

      // send multipart form data necesssary after file data... 
      dos.writeBytes(lineEnd); 
      dos.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd); 

      // Responses from the server (code and message) 
      serverResponseCode = conn.getResponseCode(); 
      String serverResponseMessage = conn.getResponseMessage(); 
      final String response; 
      Log.i("uploadFile", "HTTP Response is : " 
        + serverResponseMessage + ": " + serverResponseCode + serverResponseMessage); 
      String data; 
      if (serverResponseCode == 200) { 

       final HttpURLConnection finalConn = conn; 
       runOnUiThread(new Runnable() { 
        public void run() { 

          /*String msg = "File Upload Completed.\n\n See uploaded file here : \n\n" 
              +" http://www.androidexample.com/media/uploads/" 
              +uploadFileName;*/ 

         //messageText.setText(msg); 
         String data = null; 
         BufferedReader in = null; 
         try { 
          in = new BufferedReader(new 
            InputStreamReader(
            finalConn.getInputStream())); 
          StringBuilder result = new StringBuilder(); 
          String line; 

          while ((line = in.readLine()) != null) { 

           result.append(line); 

           data = result.toString(); 
           break; 
          } 
         } catch (IOException e) { 
          e.printStackTrace(); 
         } 


         Toast.makeText(Individual_Message.this, "File Upload Complete." + data, 
           Toast.LENGTH_SHORT).show(); 
        } 
       }); 
      } 

      //close the streams // 
      fileInputStream.close(); 
      dos.flush(); 
      dos.close(); 

     } catch (MalformedURLException ex) { 

      //dialog.dismiss(); 
      ex.printStackTrace(); 

      runOnUiThread(new Runnable() { 
       public void run() { 
        //messageText.setText("MalformedURLException Exception : check script url."); 
        Toast.makeText(Individual_Message.this, "MalformedURLException", Toast.LENGTH_SHORT).show(); 
       } 
      }); 

      Log.e("Upload file to server", "error: " + ex.getMessage(), ex); 
     } catch (Exception e) { 

      // dialog.dismiss(); 
      e.printStackTrace(); 

      runOnUiThread(new Runnable() { 
       public void run() { 
        // messageText.setText("Got Exception : see logcat "); 
        Toast.makeText(Individual_Message.this, "Got Exception : see logcat ", 
          Toast.LENGTH_SHORT).show(); 
       } 
      }); 
      Log.e("Upload file", "Exception : " 
        + e.getMessage(), e); 
     } 
     //dialog.dismiss(); 
     return serverResponseCode; 

    } 
} 

индивидуально работаю получить точный результат, но в моем приложении

получить журнал кошки как

V/Selected File Path:: /storage/emulated/0/temporary_file_0.jpg 
V/FA: Activity resumed, time: 268130823 
V/FA: Inactivity, disconnecting from AppMeasurementService 
W/System.err: android.os.NetworkOnMainThreadException 
W/System.err:  at   android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1273) 
W/System.err:  at  libcore.io.BlockGuardOs.recvfrom(BlockGuardOs.java:249) 
W/System.err:  at libcore.io.IoBridge.recvfrom(IoBridge.java:549) 
W/System.err:  at java.net.PlainSocketImpl.read(PlainSocketImpl.java:481) 
W/System.err:  at java.net.PlainSocketImpl.- wrap0(PlainSocketImpl.java) 
W/System.err:  at java.net.PlainSocketImpl$PlainSocketInputStream.read(PlainSocketImpl.java:237) 
W/System.err:  at com.android.okhttp.okio.Okio$2.read(Okio.java:135) 
W/System.err:  at com.android.okhttp.okio.AsyncTimeout$2.read(AsyncTimeout.java:211) 
W/System.err:  at com.android.okhttp.okio.RealBufferedSource.exhausted(RealBufferedSource.java:60) 
W/System.err:  at com.android.okhttp.internal.http.HttpConnection.isReadable(HttpConnection.java:155) 
W/System.err:  at com.android.okhttp.Connection.isReadable(Connection.java:235) 
W/System.err:  at com.android.okhttp.OkHttpClient$1.isReadable(OkHttpClient.java:91) 
W/System.err:  at com.android.okhttp.internal.http.HttpEngine.createNextConnection(HttpEngine.java:350) 
W/System.err:  at com.android.okhttp.internal.http.HttpEngine.nextConnection(HttpEngine.java:340) 
W/System.err:  at com.android.okhttp.internal.http.HttpEngine.connect(HttpEngine.java:330) 
W/System.err:  at com.android.okhttp.internal.http.HttpEngine.sendRequest(HttpEngine.java:248) 
W/System.err:  at com.android.okhttp.internal.huc.HttpURLConnectionImpl.execute HttpURLConnectionImpl.java:437) 
W/System.err:  at com.android.okhttp.internal.huc.HttpURLConnectionImpl.connect(HttpURLConnectionImpl.java:114) 
W/System.err:  at com.android.okhttp.internal.huc.HttpURLConnectionImpl.getOutputStream(HttpURLConnectionImpl.java:245) 
W/System.err:  at technologies.codegreen.com.drzonesample.My_Messages.Individual_Message.uploadFile(Individual_Message.java:355) 
W/System.err:  at technologies.codegreen.com.drzonesample.My_Messages.Individual_Message$2.onClick(Individual_Message.java:148) 
W/System.err:  at android.view.View.performClick(View.java:5204) 
W/System.err:  at android.view.View$PerformClick.run(View.java:21153) 
W/System.err:  at android.os.Handler.handleCallback(Handler.java:739) 
W/System.err:  at android.os.Handler.dispatchMessage(Handler.java:95) 
W/System.err:  at android.os.Looper.loop(Looper.java:148) 
W/System.err:  at android.app.ActivityThread.main(ActivityThread.java:5480) 
W/System.err:  at java.lang.reflect.Method.invoke(Native Method) 
W/System.err:  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 
W/System.err:  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 
E/Upload file: Exception : null 
      android.os.NetworkOnMainThreadException 
       at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1273) 
       at libcore.io.BlockGuardOs.recvfrom(BlockGuardOs.java:249) 
       at libcore.io.IoBridge.recvfrom(IoBridge.java:549) 
       at java.net.PlainSocketImpl.read(PlainSocketImpl.java:481) 
       at java.net.PlainSocketImpl.-wrap0(PlainSocketImpl.java) 
       at java.net.PlainSocketImpl$PlainSocketInputStream.read(PlainSocketImpl.java:237) 
       at com.android.okhttp.okio.Okio$2.read(Okio.java:135) 
       at com.android.okhttp.okio.AsyncTimeout$2.read(AsyncTimeout.java:211) 
       at com.android.okhttp.okio.RealBufferedSource.exhausted(RealBufferedSource.java:60) 
       at com.android.okhttp.internal.http.HttpConnection.isReadable(HttpConnection.java:155) 
       at com.android.okhttp.Connection.isReadable(Connection.java:235) 
       at com.android.okhttp.OkHttpClient$1.isReadable(OkHttpClient.java:91) 
       at com.android.okhttp.internal.http.HttpEngine.createNextConnection(HttpEngine.java:350) 
       at com.android.okhttp.internal.http.HttpEngine.nextConnection(HttpEngine.java:340) 
       at com.android.okhttp.internal.http.HttpEngine.connect(HttpEngine.java:330) 
       at com.android.okhttp.internal.http.HttpEngine.sendRequest(HttpEngine.java:248) 
       at com.android.okhttp.internal.huc.HttpURLConnectionImpl.execute(HttpURLConnectionImpl.java:437) 
       at com.android.okhttp.internal.huc.HttpURLConnectionImpl.connect(HttpURLConnectionImpl.java:114) 
       at com.android.okhttp.internal.huc.HttpURLConnectionImpl.getOutputStream(HttpURLConnectionImpl.java:245) 
       at technologies.codegreen.com.drzonesample.My_Messages.Individual_Message.uploadFile(Individual_Message.java:355) 
       at technologies.codegreen.com.drzonesample.My_Messages.Individual_Message$2.onClick(Individual_Message.java:148) 
       at android.view.View.performClick(View.java:5204) 
       at android.view.View$PerformClick.run(View.java:21153) 
       at android.os.Handler.handleCallback(Handler.java:739) 
       at android.os.Handler.dispatchMessage(Handler.java:95) 
       at android.os.Looper.loop(Looper.java:148) 
       at android.app.ActivityThread.main(ActivityThread.java:5480) 
       at java.lang.reflect.Method.invoke(Native Method) 
       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 
       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 

Answer 1

NetworkOnMainThreadException вызывается, когда ваше приложение пытается выполнить сетевую операцию в своем основном потоке.

Используйте AsyncTask и запустить свой код в нем

Answer 2

To avoid the application not responding error, android avoids you to do any long operation in UI thread synchronously. 
You have do to it in a separated thread asynchronously as follows. 

Create a different class 
private class DownloadFilesTask extends AsyncTask<URL, Integer, Long> { 
    protected Long doInBackground(URL... urls) { 
     int count = urls.length; 
     long totalSize = 0; 
     for (int i = 0; i < count; i++) {    
//write your code of file download. 
      publishProgress((int) ((i/(float) count) * 100)); 
      // Escape early if cancel() is called 
      if (isCancelled()) break; 
     } 
     return totalSize; 
    } 

    protected void onProgressUpdate(Integer... progress) { 
     setProgressPercent(progress[0]); 
    } 

    protected void onPostExecute(Long result) { 
     showDialog("Downloaded " + result + " bytes"); 
    } 
} 

and in upload file method just call this. 

new DownloadFilesTask().execute(url1, url2, url3); 

Theory https://developer.android.com/reference/android/os/AsyncTask.html