您好我正在尝试将数据发送到网络服务
String url =“https://www.myurl.com”;
URL urlobj = new URL(url);
HttpsURLConnection con = (HttpsURLConnection) urlobj.openConnection();
con.setRequestMethod("POST");
con.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
String urlParameters = GenerateUrlParameters(data);
con.setDoOutput(true);
con.setDoInput(true);
Log.i("test", "hit1");
DataOutputStream wr = new DataOutputStream(con.getOutputStream());
Log.i("test", "hit2");
wr.writeBytes(urlParameters);
wr.flush();
wr.close();
Hit1被击中，但它在下一行失败并且未击中hit2。我做错了什么？
我的logcat
10-18 09:17:33.302: D/gralloc_goldfish(2228): Emulator without GPU emulation detected.
10-18 09:17:33.322: W/TextLayoutCache(2228): computeValuesWithHarfbuzz -- need to force to single run
10-18 09:17:37.862: I/test(2228): hit1
10-18 09:17:37.872: D/AndroidRuntime(2228): Shutting down VM
10-18 09:17:37.872: W/dalvikvm(2228): threadid=1: thread exiting with uncaught exception (group=0x409961f8)
10-18 09:17:37.912: E/AndroidRuntime(2228): FATAL EXCEPTION: main
10-18 09:17:37.912: E/AndroidRuntime(2228): java.lang.IllegalStateException: Could not execute method of the activity
10-18 09:17:37.912: E/AndroidRuntime(2228): at android.view.View$1.onClick(View.java:3039)
10-18 09:17:37.912: E/AndroidRuntime(2228): at android.view.View.performClick(View.java:3480)
10-18 09:17:37.912: E/AndroidRuntime(2228): at android.view.View$PerformClick.run(View.java:13983)
10-18 09:17:37.912: E/AndroidRuntime(2228): at android.os.Handler.handleCallback(Handler.java:605)
10-18 09:17:37.912: E/AndroidRuntime(2228): at android.os.Handler.dispatchMessage(Handler.java:92)
10-18 09:17:37.912: E/AndroidRuntime(2228): at android.os.Looper.loop(Looper.java:137)
10-18 09:17:37.912: E/AndroidRuntime(2228): at android.app.ActivityThread.main(ActivityThread.java:4340)
10-18 09:17:37.912: E/AndroidRuntime(2228): at java.lang.reflect.Method.invokeNative(Native Method)
10-18 09:17:37.912: E/AndroidRuntime(2228): at java.lang.reflect.Method.invoke(Method.java:511)
10-18 09:17:37.912: E/AndroidRuntime(2228): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
10-18 09:17:37.912: E/AndroidRuntime(2228): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
10-18 09:17:37.912: E/AndroidRuntime(2228): at dalvik.system.NativeStart.main(Native Method)
10-18 09:17:37.912: E/AndroidRuntime(2228): Caused by: java.lang.reflect.InvocationTargetException
10-18 09:17:37.912: E/AndroidRuntime(2228): at java.lang.reflect.Method.invokeNative(Native Method)
10-18 09:17:37.912: E/AndroidRuntime(2228): at java.lang.reflect.Method.invoke(Method.java:511)
10-18 09:17:37.912: E/AndroidRuntime(2228): at android.view.View$1.onClick(View.java:3034)
10-18 09:17:37.912: E/AndroidRuntime(2228): ... 11 more
10-18 09:17:37.912: E/AndroidRuntime(2228): Caused by: android.os.NetworkOnMainThreadException
10-18 09:17:37.912: E/AndroidRuntime(2228): at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1084)
10-18 09:17:37.912: E/AndroidRuntime(2228): at java.net.InetAddress.lookupHostByName(InetAddress.java:391)
10-18 09:17:37.912: E/AndroidRuntime(2228): at java.net.InetAddress.getAllByNameImpl(InetAddress.java:242)
10-18 09:17:37.912: E/AndroidRuntime(2228): at java.net.InetAddress.getAllByName(InetAddress.java:220)
10-18 09:17:37.912: E/AndroidRuntime(2228): at libcore.net.http.HttpConnection.<init>(HttpConnection.java:71)
10-18 09:17:37.912: E/AndroidRuntime(2228): at libcore.net.http.HttpConnection.<init>(HttpConnection.java:50)
10-18 09:17:37.912: E/AndroidRuntime(2228): at libcore.net.http.HttpConnection$Address.connect(HttpConnection.java:351)
10-18 09:17:37.912: E/AndroidRuntime(2228): at libcore.net.http.HttpConnectionPool.get(HttpConnectionPool.java:86)
10-18 09:17:37.912: E/AndroidRuntime(2228): at libcore.net.http.HttpConnection.connect(HttpConnection.java:128)
10-18 09:17:37.912: E/AndroidRuntime(2228): at libcore.net.http.HttpEngine.openSocketConnection(HttpEngine.java:308)
10-18 09:17:37.912: E/AndroidRuntime(2228): at libcore.net.http.HttpsURLConnectionImpl$HttpsEngine.makeSslConnection(HttpsURLConnectionImpl.java:460)
10-18 09:17:37.912: E/AndroidRuntime(2228): at libcore.net.http.HttpsURLConnectionImpl$HttpsEngine.connect(HttpsURLConnectionImpl.java:432)
10-18 09:17:37.912: E/AndroidRuntime(2228): at libcore.net.http.HttpEngine.sendSocketRequest(HttpEngine.java:282)
10-18 09:17:37.912: E/AndroidRuntime(2228): at libcore.net.http.HttpEngine.sendRequest(HttpEngine.java:232)
10-18 09:17:37.912: E/AndroidRuntime(2228): at libcore.net.http.HttpURLConnectionImpl.connect(HttpURLConnectionImpl.java:80)
10-18 09:17:37.912: E/AndroidRuntime(2228): at libcore.net.http.HttpURLConnectionImpl.getOutputStream(HttpURLConnectionImpl.java:188)
10-18 09:17:37.912: E/AndroidRuntime(2228): at libcore.net.http.HttpsURLConnectionImpl.getOutputStream(HttpsURLConnectionImpl.java:280)
10-18 09:17:37.912: E/AndroidRuntime(2228): at dk.example.epaypayment.EpayHttpRequest.MakePayment(EpayHttpRequest.java:53)
10-18 09:17:37.912: E/AndroidRuntime(2228): at dk.example.epaypayment.MainActivity.sendMessage(MainActivity.java:37)
10-18 09:17:37.912: E/AndroidRuntime(2228): ... 14 more
10-18 09:22:38.232: I/Process(2228): Sending signal. PID: 2228 SIG: 9
答案 0 :(得分：12)
使用参数调用sendPostRequest(String username, String pass)方法。您可以从UI线程调用此方法，请求将从另一个线程发送（AsyncTask已嵌入）。
private void sendPostRequest(String givenUsername, String givenPassword) {
class SendPostReqAsyncTask extends AsyncTask<String, Void, String> {
@Override
protected String doInBackground(String... params) {
String paramUsername = params[0];
String paramPassword = params[1];
System.out.println("*** doInBackground ** paramUsername "
+ paramUsername + " paramPassword :" + paramPassword);
HttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(
"http://lib-dm.process9.com/libertydm/ValidateUserHandler.ashx");// replace with your url
httpPost.addHeader("Content-type",
"application/x-www-form-urlencoded");
BasicNameValuePair usernameBasicNameValuePair = new BasicNameValuePair(
"UserId", paramUsername); // Make your own key value pair
BasicNameValuePair passwordBasicNameValuePAir = new BasicNameValuePair(
"Password", paramPassword);// make your own key value pair
// You can add more parameters like above
List<NameValuePair> nameValuePairList = new ArrayList<NameValuePair>();
nameValuePairList.add(usernameBasicNameValuePair);
nameValuePairList.add(passwordBasicNameValuePair);
try {
UrlEncodedFormEntity urlEncodedFormEntity = new UrlEncodedFormEntity(
nameValuePairList);
httpPost.setEntity(urlEncodedFormEntity);
try {
HttpResponse httpResponse = httpClient
.execute(httpPost);
InputStream inputStream = httpResponse.getEntity()
.getContent();
InputStreamReader inputStreamReader = new InputStreamReader(
inputStream);
BufferedReader bufferedReader = new BufferedReader(
inputStreamReader);
StringBuilder stringBuilder = new StringBuilder();
String bufferedStrChunk = null;
while ((bufferedStrChunk = bufferedReader.readLine()) != null) {
stringBuilder.append(bufferedStrChunk);
}
return stringBuilder.toString();
} catch (ClientProtocolException cpe) {
System.out
.println("First Exception coz of HttpResponese :"
+ cpe);
cpe.printStackTrace();
} catch (IOException ioe) {
System.out
.println("Second Exception coz of HttpResponse :"
+ ioe);
ioe.printStackTrace();
}
} catch (UnsupportedEncodingException uee) {
System.out
.println("An Exception given because of UrlEncodedFormEntity argument :"
+ uee);
uee.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
}
}
SendPostReqAsyncTask sendPostReqAsyncTask = new SendPostReqAsyncTask();
sendPostReqAsyncTask.execute(givenUsername, givenPassword);
}
答案 1 :(得分：1)
尝试实现此代码，它应该工作。 如果您的Android版本高于4.0，那么您将不得不强制使用Asyn Task，因此该http请求不会在主线程上运行。否则应用程序将崩溃。 如果应用程序使用HTTPGET或HTTPPOST方法并且正在主线程上运行，它将崩溃。 Asyn TAsk是解决方案。
HttpClient client = new DefaultHttpClient();
HttpResponse response;
JSONObject json=new JSONObject();
HttpPost post = new HttpPost(url1);
try {
json.put("Key","your value");
json.put("Key", "Value");
StringEntity stringEntity = new StringEntity(json.toString());
stringEntity.setContentEncoding("UTF-8");
stringEntity.setContentType("application/json");
post.setEntity(stringEntity);
response = client.execute(post);
Log.e("RESPONSE", response.toString());
String responseBody = EntityUtils
.toString(response.getEntity());
res= responseBody.toString();
Log.e("RESPONSE BODY", responseBody);
答案 2 :(得分：0)
好吧，我建议使用HttpClient以更高的抽象方式进行。
DefaultHttpClient httpClient = null;
HttpParams my_httpParams = new BasicHttpParams();
httpClient = new DefaultHttpClient(my_httpParams);
然后发送
HttpPost httpPost = new HttpPost(stringUri);
httpPost.setHeader("Content-type", "application/x-www-form-urlencoded");
httpPost.setHeader("charset", "utf-8");
if (!TextUtils.isEmpty(someStringToSend)) {
httpPost.setEntity(new StringEntity(someStringToSend, HTTP.UTF_8));
}
HttpResponse responsePOST = httpClient.execute(httpPost);
HttpEntity resEntity = responsePOST.getEntity();
if (resEntity != null) {
response = EntityUtils.toString(resEntity, HTTP.UTF_8);
}
我没有测试过，但应该可以使用。