Android 4.0.3 HTTP POST文件到PHP服務器失敗

Question

我只是將我的Android從2.3.4升級到4.0.3，但是當我想要將文件（大約2MB）發佈到php服務器時發現問題http post方法。但看起來Android 4.0.3不起作用，而Android 2.3.4運行良好。

以下是我的Android代碼來發布文件的一部分：

private boolean postFile(String urlstr, String localpath, String uploadname) { 
    HttpURLConnection conn = null; 
    DataOutputStream os = null; 
    String lineEnd = "\r\n"; 
    String twoHyphens = "--"; 
    String boundary = "*****"; 
    int bytesRead, bytesAvailable, bufferSize, bytesUploaded = 0; 
    byte[] buffer; 
    int maxBufferSize = 2*1024*1024; 

    try 
    { 
     FileInputStream fis = new FileInputStream(new File(localpath)); 

     URL url = new URL(urlstr); 
     conn = (HttpURLConnection) url.openConnection(); 
     conn.setChunkedStreamingMode(maxBufferSize); 

     // POST settings. 
     conn.setDoInput(true); 
     conn.setDoOutput(true); 
     conn.setUseCaches(false); 
     conn.setRequestMethod("POST"); 
     conn.setRequestProperty("Connection", "Keep-Alive"); 
     conn.setRequestProperty("Content-Type", "multipart/form-data; boundary="+boundary); 

     os = new DataOutputStream(conn.getOutputStream()); 
     os.writeBytes(twoHyphens + boundary + lineEnd); 
     os.writeBytes("Content-Disposition: form-data; name=\"uploadedfile\";filename=\"" + uploadname +"\"" + lineEnd); 
     os.writeBytes(lineEnd); 

     bytesAvailable = fis.available(); 
     System.out.println("available: " + String.valueOf(bytesAvailable)); 
     bufferSize = Math.min(bytesAvailable, maxBufferSize); 
     buffer = new byte[bufferSize]; 

     prog = 0; 
     bytesRead = fis.read(buffer, 0, bufferSize); 
     bytesUploaded += bytesRead; 
     while (bytesRead > 0) 
     { 
      prog = bytesUploaded/bytesAvailable; 
      os.write(buffer, 0, bufferSize); 
      bytesAvailable = fis.available(); 
      bufferSize = Math.min(bytesAvailable, maxBufferSize); 
      buffer = new byte[bufferSize]; 
      bytesRead = fis.read(buffer, 0, bufferSize); 
      bytesUploaded += bytesRead; 
     } 
     System.out.println("uploaded: "+String.valueOf(bytesUploaded)); 
     os.writeBytes(lineEnd); 
     os.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd); 

     // Responses from the server (code and message) 
     conn.setConnectTimeout(2000); // allow 2 seconds timeout. 
     int rcode = conn.getResponseCode(); 
     if (rcode == 200) Toast.makeText(getApplicationContext(), "Success!!", Toast.LENGTH_LONG).show(); 
     else Toast.makeText(getApplicationContext(), "Failed!!", Toast.LENGTH_LONG).show(); 
     //String rmsg = conn.getResponseMessage(); 
     fis.close(); 
     os.flush(); 
     os.close(); 
     return rcode == 200; 
    } 
    catch (Exception ex) 
    { 
     ex.printStackTrace(); 
     return false; 
    } 
} 

然後我得到以下異常：

02-02 22:38:34.626: W/System.err(5547): android.os.NetworkOnMainThreadException 
02-02 22:38:34.631: W/System.err(5547): at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1099) 
02-02 22:38:34.631: W/System.err(5547):  at libcore.io.BlockGuardOs.connect(BlockGuardOs.java:84) 
02-02 22:38:34.631: W/System.err(5547):  at libcore.io.IoBridge.connectErrno(IoBridge.java:127) 
02-02 22:38:34.636: W/System.err(5547):  at libcore.io.IoBridge.connect(IoBridge.java:112) 
02-02 22:38:34.641: W/System.err(5547):  at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:192) 
02-02 22:38:34.641: W/System.err(5547):  at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:459) 
02-02 22:38:34.641: W/System.err(5547):  at java.net.Socket.connect(Socket.java:842) 
02-02 22:38:34.641: W/System.err(5547):  at libcore.net.http.HttpConnection.<init>(HttpConnection.java:77) 
02-02 22:38:34.646: W/System.err(5547):  at libcore.net.http.HttpConnection.<init>(HttpConnection.java:50) 
02-02 22:38:34.646: W/System.err(5547):  at libcore.net.http.HttpConnection$Address.connect(HttpConnection.java:351) 
02-02 22:38:34.646: W/System.err(5547):  at libcore.net.http.HttpConnectionPool.get(HttpConnectionPool.java:86) 
02-02 22:38:34.646: W/System.err(5547):  at libcore.net.http.HttpConnection.connect(HttpConnection.java:128) 
02-02 22:38:34.651: W/System.err(5547):  at libcore.net.http.HttpEngine.openSocketConnection(HttpEngine.java:308) 
02-02 22:38:34.651: W/System.err(5547):  at libcore.net.http.HttpEngine.connect(HttpEngine.java:303) 
02-02 22:38:34.651: W/System.err(5547):  at libcore.net.http.HttpEngine.sendSocketRequest(HttpEngine.java:282) 
02-02 22:38:34.651: W/System.err(5547):  at libcore.net.http.HttpEngine.sendRequest(HttpEngine.java:232) 
02-02 22:38:34.656: W/System.err(5547):  at libcore.net.http.HttpURLConnectionImpl.connect(HttpURLConnectionImpl.java:80) 
02-02 22:38:34.656: W/System.err(5547):  at libcore.net.http.HttpURLConnectionImpl.getOutputStream(HttpURLConnectionImpl.java:188) 
02-02 22:38:34.656: W/System.err(5547):  at edu.socialsense.SocialsenseService.postFile(SocialsenseService.java:324) 
02-02 22:38:34.661: W/System.err(5547):  at edu.socialsense.SocialsenseService.report(SocialsenseService.java:285) 
02-02 22:38:34.661: W/System.err(5547):  at edu.socialsense.SocialsenseService.access$7(SocialsenseService.java:279) 
02-02 22:38:34.661: W/System.err(5547):  at edu.socialsense.SocialsenseService$1.onReceive(SocialsenseService.java:79) 
02-02 22:38:34.661: W/System.err(5547):  at android.app.LoadedApk$ReceiverDispatcher$Args.run(LoadedApk.java:728) 
02-02 22:38:34.661: W/System.err(5547):  at android.os.Handler.handleCallback(Handler.java:605) 
02-02 22:38:34.666: W/System.err(5547):  at android.os.Handler.dispatchMessage(Handler.java:92) 
02-02 22:38:34.666: W/System.err(5547):  at android.os.Looper.loop(Looper.java:137) 
02-02 22:38:34.666: W/System.err(5547):  at android.app.ActivityThread.main(ActivityThread.java:4507) 
02-02 22:38:34.666: W/System.err(5547):  at java.lang.reflect.Method.invokeNative(Native Method) 
02-02 22:38:34.671: W/System.err(5547):  at java.lang.reflect.Method.invoke(Method.java:511) 
02-02 22:38:34.671: W/System.err(5547):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789) 
02-02 22:38:34.671: W/System.err(5547):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:556) 
02-02 22:38:34.671: W/System.err(5547):  at dalvik.system.NativeStart.main(Native Method) 

當我按照步驟代碼一步，我發現當url連接嘗試連接時發生異常，比如conn.connect（）或conn.getOutputStream（）。

請幫助我...

非常感謝！

Answer 1

從Android4.0開始，「HttpUrlConnection」方法默認使用「get」方法。

如果添加SetDoOutput(true)"屬性，將會調用「POST」方法。

底線是「請刪除conn.setDoOutput(true);與您的代碼，然後運行。

讓我知道如果這能解決問題烏爾。

Answer 2

android.os.NetworkOnMainThreadException被拋出。

你不應該」 t在主線程上執行網絡操作，這會導致你的應用程序沒有響應，在Honeycomb之前你可以避開它，但是Honeycomb和更新的Android版本會檢查並拋出異常。開發人員API。