本文介绍了IllegalStateException异常：内容已被消耗的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我得到了下面的code打，因为 IllegalStateException异常。任何人都可以请帮我吗？ code：
进口java.io.BufferedReader中;
进口java.io.IOException异常;
进口的java.io.InputStream;
进口java.io.InputStreamReader中;
进口java.security.MessageDigest中;
进口java.security.NoSuchAlgorithmException;
进口的java.util.ArrayList;
进口的java.util.List;
进口org.apache.http.HttpEntity;
进口org.apache.http.Htt presponse;
进口org.apache.http.NameValuePair;
进口org.apache.http.ParseException;
进口org.apache.http.client.ClientProtocolException;
进口org.apache.http.client.HttpClient;
进口org.apache.http.client.entity.UrlEn codedFormEntity;
进口org.apache.http.client.methods.HttpPost;
进口org.apache.http.impl.client.DefaultHttpClient;
进口org.apache.http.message.BasicNameValuePair;
进口org.apache.http.protocol.HTTP;
进口org.apache.http.util.EntityUtils;
进口org.json.JSONObject;
进口android.app.Activity;
进口android.os.Bundle;
进口android.telephony.gsm.GsmCellLocation;
进口android.util.Log;
进口android.view.View;
进口android.view.View.OnClickListener;
进口android.widget.Button;
进口android.widget.EditText;
进口android.widget.Toast;
公共类登录扩展活动{
@覆盖
保护无效的onCreate（包savedInstanceState）{
super.onCreate（savedInstanceState）;
的setContentView（R.layout.login）;
按钮BT =（按钮）findViewById（R.id.logbt）;
最终用户的EditText =（EditText上）findViewById（R.id.loguser）;
最后的EditText PW =（EditText上）findViewById（R.id.logpw）;
bt.setOnClickListener（新OnClickListener（）{
@覆盖
公共无效的onClick（视图v）{
如果（user.getText（）的toString（）=！＆放大器;＆安培;！pw.getText（）的toString（）=）{
线程t =新的Thread（）{
公共无效的run（）{
尝试 {
HttpClient的客户端=新DefaultHttpClient（）;
字符串postURL =http://surfkid.redio.de/login;
HttpPost后=新HttpPost（postURL）;
ArrayList的＆LT;的NameValuePair＆GT; PARAMS =新的ArrayList＆LT;的NameValuePair＆GT;（）;
params.add（新BasicNameValuePair（用户名，user.getText（）的toString（）））;
params.add（新BasicNameValuePair（密码，MD5（pw.getText（）的toString（））））;
UrlEn codedFormEntity ENT =新UrlEn codedFormEntity（参数，可以HTTP.UTF_8）;
post.setEntity（ENT）;
HTT presponse responsePOST = client.execute（后）;
HttpEntity resEntity = responsePOST.getEntity（）;
最后的JSONObject jObject =新的JSONObject（EntityUtils.toString（resEntity））;
Log.e（XXX，EntityUtils.toString（resEntity））;
}赶上（例外五）{
Log.e（XXX，e.toString（））;
}
}
};
t.start（）;
// Log.e（XXX，多个）;
}
}
}）;
}
私人字符串的MD5（字符串中）{
消息摘要消化;
尝试 {
消化= MessageDigest.getInstance（MD5）;
digest.reset（）;
digest.update（in.getBytes（））;
byte []的一个= digest.digest（）;
INT LEN =则为a.length;
StringBuilder的SB =新的StringBuilder（LEN＆LT;＆LT; 1）;
的for（int i = 0; I＆LT; LEN;我++）{
sb.append（Character.forDigit（（A [1]＆安培; 0XF0）GT;→4，16））;
sb.append（Character.forDigit（A [1]放大器;为0x0F，16））;
}
返回sb.toString（）;
}赶上（抛出：NoSuchAlgorithmException E）{
e.printStackTrace（）;
}
返回null;
}
}
logcat的消息：
解决方案
可以从实体内容仅一次$ C>
在该行：
您已经消耗的内容，并再次使用的是相同的，在这里：
这就是为什么它是造成 IllegalStateException异常：内容已被消耗
因此，解决办法是在这里：
字符串_response = EntityUtils.toString（resEntity）; //内容将消耗一次
最后的JSONObject jObject =新的JSONObject（_response）;
Log.e（XXX，_响应）;
I got struck because of IllegalStateException in the following code. Can anybody please help me? Code:
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.ArrayList;
import java.util.List;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.ParseException;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.protocol.HTTP;
import org.apache.http.util.EntityUtils;
import org.json.JSONObject;
import android.app.Activity;
import android.os.Bundle;
import android.telephony.gsm.GsmCellLocation;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class Login extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.login);
Button bt = (Button) findViewById(R.id.logbt);
final EditText user = (EditText) findViewById(R.id.loguser);
final EditText pw = (EditText) findViewById(R.id.logpw);
bt.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if (user.getText().toString() != "" && pw.getText().toString() != "") {
Thread t = new Thread() {
public void run() {
try {
HttpClient client = new DefaultHttpClient();
String postURL = "http://surfkid.redio.de/login";
HttpPost post = new HttpPost(postURL);
ArrayList<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("username", user.getText().toString()));
params.add(new BasicNameValuePair("password", md5(pw.getText().toString())));
UrlEncodedFormEntity ent = new UrlEncodedFormEntity(params, HTTP.UTF_8);
post.setEntity(ent);
HttpResponse responsePOST = client.execute(post);
HttpEntity resEntity = responsePOST.getEntity();
final JSONObject jObject = new JSONObject(EntityUtils.toString(resEntity));
Log.e("XXX", EntityUtils.toString(resEntity));
} catch (Exception e) {
Log.e("XXX", e.toString());
}
}
};
t.start();
// Log.e("XXX",s);
}
}
});
}
private String md5(String in) {
MessageDigest digest;
try {
digest = MessageDigest.getInstance("MD5");
digest.reset();
digest.update(in.getBytes());
byte[] a = digest.digest();
int len = a.length;
StringBuilder sb = new StringBuilder(len << 1);
for (int i = 0; i < len; i++) {
sb.append(Character.forDigit((a[i] & 0xf0) >> 4, 16));
sb.append(Character.forDigit(a[i] & 0x0f, 16));
}
return sb.toString();
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
}
return null;
}
}
Logcat message:
解决方案
You can consume Content only at once from an Entity
in the line :
you have consumed content and again you are using the same at here:
That why it is causing IllegalStateException: Content has been consumed
So the solution is here:
String _response=EntityUtils.toString(resEntity); // content will be consume only once
final JSONObject jObject=new JSONObject(_response);
Log.e("XXX",_response);
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