Android：通过url传递参数

我想使用http post请求将一些数据插入到数据库中。我post.php中页是：Android：通过url传递参数

 if(trim($_GET['param1'])!="" && trim($_GET['param2'])!="" && trim($_GET['param3'])!="" && trim($_GET['param4'])!="" && trim($_GET['param5'])!="") 
{ 
    $connectionInfo = array( "UID" => $DB_USER, "PWD" => $DB_PASS, "Database"=>$DB_DATABASE); 
    $con = sqlsrv_connect($DB_SERVER,$connectionInfo); 
    if(!$con) 
    { 
     die('Could not connect: ' . sqlsrv_errors()); 
    } 
    $query="INSERT INTO Table (param1,param2,param3,param4,param5) VALUES (
      '".$_GET['param1']."', 
      ".$_GET['param2'].", 
      ".$_GET['param3'].", 
      '".$_GET['param4']."', 
      ".$_GET['param5'].")"; 
      [...]

，并以发送数据，我附上所有的URL参数，如：

，一切工作正常，但是当我试图把我的来自我的Android应用程序的数据无法达到我的目标。如何通过网址传递数据？在Android中我已经试过：

HttpPost httppost = new HttpPost("http://<Myip>/MySite/post.php"); 
    List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(5); 
    nameValuePairs.add(new BasicNameValuePair("param2", "10")); 
    nameValuePairs.add(new BasicNameValuePair("param3", "98")); 
    nameValuePairs.add(new BasicNameValuePair("param1", "2012-12-01 13:00:00")); 
    nameValuePairs.add(new BasicNameValuePair("param4", "Name")); 
    nameValuePairs.add(new BasicNameValuePair("param5", "50")); 
    //httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs, "UTF-8")); 
    httppost.setHeader("Content-Type", "application/x-www-form-urlencoded"); 
    httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs)); 

    // Execute HTTP Post Request 
    HttpResponse response = httpclient.execute(httppost)

，并用：

String urlParameters = "param1=2012-12-01 13:00:00&param2=b&param3=c..."; 
String request = "http://<Myip>/MySite/post.php"; 
URL url = new URL(request); 
HttpURLConnection connection = (HttpURLConnection) url.openConnection();   
connection.setDoOutput(true); 
connection.setDoInput(true); 
connection.setInstanceFollowRedirects(false); 
connection.setRequestMethod("POST"); 
connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded"); 
connection.setRequestProperty("charset", "utf-8"); 
connection.setRequestProperty("Content-Length", "" Integer.toString(urlParameters.getBytes().length)); 
connection.setUseCaches (false); 
DataOutputStream wr = new DataOutputStream(connection.getOutputStream()); 
wr.writeBytes(urlParameters); 
wr.flush(); 
wr.close(); 
connection.disconnect();

，但我总是错误。使用第二种方法的例外是：

12-17 18:08:26.617: E/AndroidRuntime(4837): FATAL EXCEPTION: main 
12-17 18:08:26.617: E/AndroidRuntime(4837): android.os.NetworkOnMainThreadException 
12-17 18:08:26.617: E/AndroidRuntime(4837):  at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1099) 
12-17 18:08:26.617: E/AndroidRuntime(4837):  at libcore.io.BlockGuardOs.connect(BlockGuardOs.java:84) 
12-17 18:08:26.617: E/AndroidRuntime(4837):  at libcore.io.IoBridge.connectErrno(IoBridge.java:127) 
12-17 18:08:26.617: E/AndroidRuntime(4837):  at libcore.io.IoBridge.connect(IoBridge.java:112) 
12-17 18:08:26.617: E/AndroidRuntime(4837):  at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:192) 
12-17 18:08:26.617: E/AndroidRuntime(4837):  at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:459) 
12-17 18:08:26.617: E/AndroidRuntime(4837):  at java.net.Socket.connect(Socket.java:842) 
12-17 18:08:26.617: E/AndroidRuntime(4837):  at libcore.net.http.HttpConnection.<init>(HttpConnection.java:77) 
12-17 18:08:26.617: E/AndroidRuntime(4837):  at libcore.net.http.HttpConnection.<init>(HttpConnection.java:50) 
12-17 18:08:26.617: E/AndroidRuntime(4837):  at libcore.net.http.HttpConnection$Address.connect(HttpConnection.java:351) 
12-17 18:08:26.617: E/AndroidRuntime(4837):  at libcore.net.http.HttpConnectionPool.get(HttpConnectionPool.java:86) 
12-17 18:08:26.617: E/AndroidRuntime(4837):  at libcore.net.http.HttpConnection.connect(HttpConnection.java:128) 
12-17 18:08:26.617: E/AndroidRuntime(4837):  at libcore.net.http.HttpEngine.openSocketConnection(HttpEngine.java:308) 
12-17 18:08:26.617: E/AndroidRuntime(4837):  at libcore.net.http.HttpEngine.connect(HttpEngine.java:303) 
12-17 18:08:26.617: E/AndroidRuntime(4837):  at libcore.net.http.HttpEngine.sendSocketRequest(HttpEngine.java:282) 
12-17 18:08:26.617: E/AndroidRuntime(4837):  at libcore.net.http.HttpEngine.sendRequest(HttpEngine.java:232) 
12-17 18:08:26.617: E/AndroidRuntime(4837):  at libcore.net.http.HttpURLConnectionImpl.connect(HttpURLConnectionImpl.java:80) 
12-17 18:08:26.617: E/AndroidRuntime(4837):  at libcore.net.http.HttpURLConnectionImpl.getOutputStream(HttpURLConnectionImpl.java:188) 
12-17 18:08:26.617: E/AndroidRuntime(4837):  at com.example.applic.applic.postData(MyApp.java:197) 
12-17 18:08:26.617: E/AndroidRuntime(4837):  at com.example.applic.applic$1.run(MyApp.java:127) 
12-17 18:08:26.617: E/AndroidRuntime(4837):  at android.os.Handler.handleCallback(Handler.java:605) 
12-17 18:08:26.617: E/AndroidRuntime(4837):  at android.os.Handler.dispatchMessage(Handler.java:92) 
12-17 18:08:26.617: E/AndroidRuntime(4837):  at android.os.Looper.loop(Looper.java:137) 
12-17 18:08:26.617: E/AndroidRuntime(4837):  at android.app.ActivityThread.main(ActivityThread.java:4514) 
12-17 18:08:26.617: E/AndroidRuntime(4837):  at java.lang.reflect.Method.invokeNative(Native Method) 
12-17 18:08:26.617: E/AndroidRuntime(4837):  at java.lang.reflect.Method.invoke(Method.java:511) 
12-17 18:08:26.617: E/AndroidRuntime(4837):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:790) 
12-17 18:08:26.617: E/AndroidRuntime(4837):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:557) 
12-17 18:08:26.617: E/AndroidRuntime(4837):  at dalvik.system.NativeStart.main(Native Method)

我该怎么办？

来源

2012-12-17 Ant4res

不要运行您的网络操作在UI线程上。看看这里：http://stackoverflow.com/questions/6343166/android-os-networkonmainthreadexception – Eric

我在一个处理程序中运行我的网络操作，它不在主线程内。 – Ant4res

除非你已经在另一个线程中启动处理程序，它仍然会在主线程上运行 – nandeesh

NetworkOnMainThreadException网络请求：

The exception that is thrown when an application attempts to perform a networking operation on its main thread.

意味着你正在尝试运行从UI线程网络操作，以便把所有与网络相关的代码中AsyncTask的doInBackground方法当doInBackground方法执行完成时使用onPostExecute更新UI

如果您正在使用API LEVEL 9或更高FROM 9那么的onCreate添加StrictMode活动，以避免这个错误

StrictMode.setThreadPolicy(new StrictMode.ThreadPolicy.Builder() 
       .detectDiskReads() 
       .detectDiskWrites() 
       .detectNetwork() 
       .penaltyLog() 
       .build());

来源

2012-12-17 17:19:07

您收到NetworkOnMainThreadException例外。您需要将网络请求代码移到另一个线程或使用Asynctask。

你不能对主线程

来源

2012-12-17 17:13:46 nandeesh

好的，但我在处理程序中运行我的postData（）方法。 – Ant4res

Handler只是一个帮助程序异步运行代码，它仍然会在主线程上运行代码。你将不得不在不同线程中创建处理器，这个线程已经准备好了，只有当它使用'API LEVEL 9或者GREATER FROM 9'时，它才能工作 – nandeesh

，然后我们将使用'StrictMode'从Ui线程创建网络，并且不需要使用'Asynctask'，但最好使用'Asynctask'来让你的代码更加可重用 –

This exception is thrown when an application attempts to perform a networking operation on its main thread which is not allowed in android version >= 3.

要想从这个异常无更好的方式来在的AsyncTask运行代码：

class BackTask extends AsyncTask<Void, Void, Void> { 
    protected Void doInBackground(Void... arg) { 
     //Implement Logic you want to perform in background. 
    } 

    protected void onPostExecute(Void feed) { 
     //Implement logic whatever you want to perform after task complete. 
    } 
} 

new BackTask().execute();

或

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

来源

2012-12-18 04:32:57

Android：通过url传递参数

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