Java 我正在尝试通过android进行http连接
我是android开发的新手，在测试通过http连接发送sms并获取返回字符串时，我收到了此错误消息。以下是http api：Java 我正在尝试通过android进行http连接,java,android,httpurlconnection,Java,Android,Httpurlconnection,我是android开发的新手，在测试通过http连接发送sms并获取返回字符串时，我收到了此错误消息。以下是http api： http://server:port/CreditCheck/checkcredits?username=xxxxx&password=xxxx 我得到java.io.ioexception，我不知道如何进一步跟踪，这真的让我头疼 public class Sender { // Username that is to be used for subm
http://server:port/CreditCheck/checkcredits?username=xxxxx&password=xxxx
public class Sender {
// Username that is to be used for submission
String username;
// password that is to be used along with username
String password;
// Message content that is to be transmitted
String message;
/**
* What type of the message that is to be sent
* <ul>
* <li>0:means plain text</li>
* <li>1:means flash</li>
* <li>2:means Unicode (Message content should be in Hex)</li>
* <li>6:means Unicode Flash (Message content should be in Hex)</li>
* </ul>
*/
String type;
/**
* Require DLR or not
* <ul>
* <li>0:means DLR is not Required</li>
* <li>1:means DLR is Required</li>
* </ul>
*/
String dlr;
/**
* Destinations to which message is to be sent For submitting more than one
* destination at once destinations should be comma separated Like
* 91999000123,91999000124
*/
String destination;
// Sender Id to be used for submitting the message
String source;
// To what server you need to connect to for submission
String server;
// Port that is to be used like 8080 or 8000
int port;
// urlParts is the excessive part of the URL
//String urlParts;
public Sender(String server, int port, String username, String password,
String message, String dlr, String type, String destination, String source) {
this.username = username;
this.password = password;
this.message = message;
this.dlr = dlr;
this.type = type;
this.destination = destination;
this.source = source;
this.server = server;
this.port = port;
}
public String checkBalance() {
try {
// Url that will be called to submit the message
URL sendUrl = new URL("http://" + this.server + ":" + this.port
+ "/CreditCheck/checkcredits");
HttpURLConnection httpConnection = (HttpURLConnection) sendUrl
.openConnection();
// This method sets the method type to POST so that
// will be send as a POST request
httpConnection.setRequestMethod("POST");
// This method is set as true wince we intend to send
// input to the server
httpConnection.setDoInput(true);
// This method implies that we intend to receive data from server.
httpConnection.setDoOutput(true);
// Implies do not use cached data
httpConnection.setUseCaches(false);
// Data that will be sent over the stream to the server.
DataOutputStream dataStreamToServer = new DataOutputStream(
httpConnection.getOutputStream());
dataStreamToServer.writeBytes("username="
+ URLEncoder.encode(this.username, "UTF-8") + "&password="
+ URLEncoder.encode(this.password, "UTF-8"));
dataStreamToServer.flush();
dataStreamToServer.close();
// Here take the output value of the server.
BufferedReader dataStreamFromUrl = new BufferedReader(new InputStreamReader(httpConnection.getInputStream()));
String dataFromUrl = "", dataBuffer = "";
// Writing information from the stream to the buffer
while ((dataBuffer = dataStreamFromUrl.readLine()) != null) {
dataFromUrl += dataBuffer;
}
/**
* Now dataFromUrl variable contains the Response received from the
* server so we can parse the response and process it accordingly.
*/
dataStreamFromUrl.close();
//System.out.println("Response: " + dataFromUrl);
return dataFromUrl;
} catch (IOException ex) {
ex.printStackTrace();
return ex.toString();
}catch(Exception ex){
ex.printStackTrace();
return ex.toString();
}
}
public String submitMessage() {
try {
// Url that will be called to submit the message
URL sendUrl = new URL("http://" + this.server + ":" + this.port + "/bulksms/bulksms");
HttpURLConnection httpConnection = (HttpURLConnection) sendUrl.openConnection();
// This method sets the method type to POST so that
// will be send as a POST request
httpConnection.setRequestMethod("GET");
// This method is set as true wince we intend to send
// input to the server
httpConnection.setDoInput(true);
// This method implies that we intend to receive data from server.
httpConnection.setDoOutput(true);
// Implies do not use cached data
httpConnection.setUseCaches(false);
// Data that will be sent over the stream to the server.
DataOutputStream dataStreamToServer = new DataOutputStream(httpConnection.getOutputStream());
dataStreamToServer.writeBytes("username="
+ URLEncoder.encode(this.username, "UTF-8") + "&password="
+ URLEncoder.encode(this.password, "UTF-8") + "&type="
+ URLEncoder.encode(this.type, "UTF-8") + "&dlr="
+ URLEncoder.encode(this.dlr, "UTF-8") + "&destination="
+ URLEncoder.encode(this.destination, "UTF-8") + "&source="
+ URLEncoder.encode(this.source, "UTF-8") + "&message="
+ URLEncoder.encode(this.message, "UTF-8"));
dataStreamToServer.flush();
dataStreamToServer.close();
// Here take the output value of the server.
BufferedReader dataStreamFromUrl = new BufferedReader(new InputStreamReader(httpConnection.getInputStream()));
String dataFromUrl = "";
String dataBuffer = "";
// Writing information from the stream to the buffer
while ((dataBuffer = dataStreamFromUrl.readLine()) != null) {
dataFromUrl += dataBuffer;
}
/**
* Now dataFromUrl variable contains the Response received from the
* server so we can parse the response and process it accordingly.
*/
dataStreamFromUrl.close();
//System.out.println("Response: " + dataFromUrl);
return dataFromUrl;
} catch (IOException ex) {
//ex.printStackTrace();
return ex.toString();
}catch(Exception ex){
return ex.toString();
}
}
10-1914:22:20.925:I/编舞1273:跳过36帧！应用程序可能在其主线程上做了太多的工作。在Android中，您必须在用户界面的单独线程上运行网络操作。否则，发送HTTP请求的行为会导致接口冻结
您的代码在注释和实际编码之间存在矛盾：
// This method sets the method type to POST so that
// will be send as a POST request
httpConnection.setRequestMethod("GET");
// This method is set as true wince we intend to send
// input to the server
httpConnection.setDoInput(true);
// This method implies that we intend to receive data from server.
httpConnection.setDoOutput(true);
为了进一步研究，请指出错误位置源行。我建议您使用httpconnection 像
用这个试试你的代码…告诉我…我一定会工作的…而且它也很简单…在那里它与流和所有。。希望这将有助于- 我很高兴地通知每一位关心我的问题的人，我的问题已经解决了 我的代码运行得很好，Angad Tiwari的代码运行得更简单 在我能够在我的avd上上网之后，我可以使用printStackTrace错误报告来查找原因，这是严格的模式策略 修复方法是我将下面的代码放在mainActivity类中
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
非常感谢大家……：您能在哪一行提供ex.printStackTrace？ioexception的完整错误消息吗？还要告诉我行语句…“@angad tiwari ioexception出现在onclick操作期间，在调用submitmessage和checkbalance Toast.makeTextgetActivity、s.checkbalance.toString、Toast.LENGTH_SHORT.show的Toast.maketext操作中；Toast.makeTextgetActivity、s.submitMessage.toString、Toast.LENGTH\u SHORT.show@Arnepoth我必须从我的android设备上进行测试，因为我不知道如何在我的模拟器上获取互联网，因此我如何实现printStackTrace，或者我将其转换为字符串，以便在Toast上显示它。MakeText stacktrace将出现在logcat输出中，不需要Toastmy设备不会冻结，一切似乎都正常工作，但执行submitMessage和checkBalance时会出现错误消息。非常感谢在故障排除期间我不得不更改请求方法，我将更改回POST，但错误仍然存在。错误位置是Toast.makeTextgetActivity、s.submitMessage.toString、Toast.LENGTH\u SHORT.show；或Toast.makeTextgetActivity、s.checkBalance.toString、Toast.LENGTH\u SHORT.show；我已经实现了代码，请在我的问题中阅读上面的代码和错误消息，包括printStackTrace。请帮帮我！除此之外。你也可以先检查浏览器上的响应。使用AdvanceREST客户端chrome扩展…因此我们知道。问题在哪里。问题已解决。请通读我的答案。我很高兴和男人们在一起：
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.myapp"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="19" />
<uses-permission android:name="android.permission.READ_CONTACTS" />
<uses-permission android:name="android.permission.INTERNET" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
// This method sets the method type to POST so that
// will be send as a POST request
httpConnection.setRequestMethod("GET");
// This method is set as true wince we intend to send
// input to the server
httpConnection.setDoInput(true);
// This method implies that we intend to receive data from server.
httpConnection.setDoOutput(true);
try
{
HttpClient client=new DefaultHttpClient();
HttpPost request=new HttpPost("your url");
BasicNameValuePair email=new BasicNameValuePair("username", "your username");
BasicNameValuePair password=new BasicNameValuePair("password", "your password");
List<NameValuePair> list=new ArrayList<NameValuePair>();
list.add(username);
list.add(password);
UrlEncodedFormEntity urlentity=new UrlEncodedFormEntity(list);
request.setEntity(urlentity);
HttpResponse response=client.execute(request);
HttpEntity entity=response.getEntity();
String tmp=EntityUtils.toString(entity);
return tmp;
}
catch(Exception e)
{
return e.toString();
}
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);