無法發送HTTP請求到後端服務器

我開發一個機器人應用HTTP數據發送到其被保持在虛擬機的後端服務器。無法發送HTTP請求到後端服務器

try{ 
    HttpClient client = new DefaultHttpClient(); 
    HttpPost post = new HttpPost("192.168.1.150/application/check.php"); 
    params.add(new BasicNameValuePair("device", Build.SERIAL)); 
    params.add(new BasicNameValuePair("person", "A")); 
    UrlEncodedFormEntity ent = new UrlEncodedFormEntity(params,HTTP.UTF_8); 
    post.setEntity(ent); 
    HttpResponse responsePOST = client.execute(post); 
    HttpEntity resEntity = responsePOST.getEntity(); 
    if (resEntity != null) {  
     Log.i("RESPONSE",EntityUtils.toString(resEntity)); 
    } 
} catch (Exception e) { 
    e.printStackTrace(); 
}

而下方則是PHP代碼：

<?php 
$file = "C:/wamp/www/application/file.txt"; 
$data = "device:".$_POST['device']." person:".$_POST['person']; 
file_put_contents($file, $data); 
?>

但是，文件不能被創建，因爲我看不到輸出，所以我無法找出應用程序是否能夠成功連接到後端服務器或不。我的移動設備和服務器機器都在同一個wifi網絡中，所以通過輸入虛擬地址，它應該能夠讓我的應用連接到服務器，不是嗎？

下面是在logcat的錯誤消息：

07-18 16:36:06.407: W/System.err(24598): android.os.NetworkOnMainThreadException 
07-18 16:36:06.415: W/System.err(24598): at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1099) 
07-18 16:36:06.415: W/System.err(24598): at libcore.io.BlockGuardOs.connect(BlockGuardOs.java:84) 
07-18 16:36:06.415: W/System.err(24598): at libcore.io.IoBridge.connectErrno(IoBridge.java:127) 
07-18 16:36:06.415: W/System.err(24598): at libcore.io.IoBridge.connect(IoBridge.java:112) 
07-18 16:36:06.415: W/System.err(24598): at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:192) 
07-18 16:36:06.415: W/System.err(24598): at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:459) 
07-18 16:36:06.415: W/System.err(24598): at java.net.Socket.connect(Socket.java:842) 
07-18 16:36:06.415: W/System.err(24598): at org.apache.http.conn.scheme.PlainSocketFactory.connectSocket(PlainSocketFactory.java:119) 
07-18 16:36:06.415: W/System.err(24598): at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:144) 
07-18 16:36:06.415: W/System.err(24598): at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164) 
07-18 16:36:06.415: W/System.err(24598): at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119) 
07-18 16:36:06.415: W/System.err(24598): at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:360) 
07-18 16:36:06.415: W/System.err(24598): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555) 
07-18 16:36:06.415: W/System.err(24598): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487) 
07-18 16:36:06.423: W/System.err(24598): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465) 
07-18 16:36:06.423: W/System.err(24598): at android.reader.Reader$1.onClick(Reader.java:106) 
07-18 16:36:06.423: W/System.err(24598): at android.view.View.performClick(View.java:3511) 
07-18 16:36:06.423: W/System.err(24598): at android.view.View$PerformClick.run(View.java:14105) 
07-18 16:36:06.423: W/System.err(24598): at android.os.Handler.handleCallback(Handler.java:605) 
07-18 16:36:06.423: W/System.err(24598): at android.os.Handler.dispatchMessage(Handler.java:92) 
07-18 16:36:06.423: W/System.err(24598): at android.os.Looper.loop(Looper.java:137) 
07-18 16:36:06.423: W/System.err(24598): at android.app.ActivityThread.main(ActivityThread.java:4424) 
07-18 16:36:06.423: W/System.err(24598): at java.lang.reflect.Method.invokeNative(Native Method) 
07-18 16:36:06.423: W/System.err(24598): at java.lang.reflect.Method.invoke(Method.java:511) 
07-18 16:36:06.423: W/System.err(24598): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) 
07-18 16:36:06.423: W/System.err(24598): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 
07-18 16:36:06.423: W/System.err(24598): at dalvik.system.NativeStart.main(Native Method)

消息顯示logcat中後，我修改程序：

07-18 17:35:05.899: E/WindowManager(28043): Activity android.reader.Reader has leaked window [email protected] that was originally added here 
07-18 17:35:05.899: E/WindowManager(28043): android.view.WindowLeaked: Activity android.reader.Reader has leaked window [email protected] that was originally added here 
07-18 17:35:05.899: E/WindowManager(28043):  at android.view.ViewRootImpl.<init>(ViewRootImpl.java:344) 
07-18 17:35:05.899: E/WindowManager(28043):  at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:267) 
07-18 17:35:05.899: E/WindowManager(28043):  at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:215) 
07-18 17:35:05.899: E/WindowManager(28043):  at android.view.WindowManagerImpl$CompatModeWrapper.addView(WindowManagerImpl.java:140) 
07-18 17:35:05.899: E/WindowManager(28043):  at android.view.Window$LocalWindowManager.addView(Window.java:537) 
07-18 17:35:05.899: E/WindowManager(28043):  at android.app.Dialog.show(Dialog.java:278) 
07-18 17:35:05.899: E/WindowManager(28043):  at android.reader.Reader$GrabURL.onPreExecute(Reader.java:219) 
07-18 17:35:05.899: E/WindowManager(28043):  at android.reader.Reader$1.onClick(Reader.java:101) 
07-18 17:35:05.899: E/WindowManager(28043):  at android.view.View.performClick(View.java:3511) 
07-18 17:35:05.899: E/WindowManager(28043):  at android.view.View$PerformClick.run(View.java:14105) 
07-18 17:35:05.899: E/WindowManager(28043):  at android.os.Handler.handleCallback(Handler.java:605) 
07-18 17:35:05.899: E/WindowManager(28043):  at android.os.Handler.dispatchMessage(Handler.java:92) 
07-18 17:35:05.899: E/WindowManager(28043):  at android.os.Looper.loop(Looper.java:137) 
07-18 17:35:05.899: E/WindowManager(28043):  at android.app.ActivityThread.main(ActivityThread.java:4424) 
07-18 17:35:05.899: E/WindowManager(28043):  at java.lang.reflect.Method.invokeNative(Native Method) 
07-18 17:35:05.899: E/WindowManager(28043):  at java.lang.reflect.Method.invoke(Method.java:511) 
07-18 17:35:05.899: E/WindowManager(28043):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) 
07-18 17:35:05.899: E/WindowManager(28043):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 
07-18 17:35:05.899: E/WindowManager(28043):  at dalvik.system.NativeStart.main(Native Method) 
07-18 17:35:05.899: D/OpenGLRenderer(28043): Flushing caches (mode 1)

來源

2012-07-18 Conrad

你是否在清單文件中包含了INTERNET權限？ – adatapost 2012-07-18 08:25:51

你在日誌中看到什麼嗎？你是否設置了正確的權限？ – Tomer 2012-07-18 08:26:24

你的意思是logcat，沒有任何顯示，我不知道爲什麼，INTERNET權限？我沒有添加它，因爲我是Android應用程序的初學者，我曾經認爲它可以按照需要訪問互聯網。首先讓我試試看，謝謝 – Conrad 2012-07-18 08:29:39

首先，你HtttpPost請求URL ..

HttpPost post = new HttpPost("192.168.1.150/application/check.php");

應該是這樣的，

HttpPost post = new HttpPost("http://192.168.1.150/application/check.php");

現在，第二，檢查應用程序的清單文件的權限

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

第三個，

放入後臺線程您完整的Web請求的代碼或的AsyncTask的doInBackGround()沒有在應用程序的MainUI線程。

終於之後，從您的Http請求檢查響應，你做了什麼..

此外，如果可能的調試你的Web請求的代碼，所以你可以找到怎麼回事錯..

解決方案：

從您的logcat的錯誤，我們得出結論：你想網絡相關操作您的活動的MainUI Thread。因此，我建議您在第三步中使用AsyncTask進行此操作。

我的回答的第三步。

把你的全部HttpRequest代碼在AsyncYAsk's doInBackGround()。

來源

2012-07-18 08:32:21 user370305

另一件事...在後臺線程中的代碼上方運行。 :) – 2012-07-18 08:35:04

@MMohsinNaeem - 我更新了我的答案。謝謝.. – user370305 2012-07-18 08:37:47

那麼你的意思是我必須創建一個AsyncTAsk類來處理請求？ – Conrad 2012-07-18 08:44:51

無法發送HTTP請求到後端服務器

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