IllegalStateException: Content has been consumed

Question

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:

01-18 18:39:53.383: ERROR/XXX(7113): java.lang.IllegalStateException: Content has been consumed

Answer 1

You can consume Content only at once from an Entity

in the line :

final JSONObject jObject = new JSONObject(EntityUtils.toString(resEntity)); 

you have consumed content and again you are using the same at here:

Log.e("XXX",EntityUtils.toString(resEntity)); 

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); 

Answer 2

it's also happens if you are writing the consuming statement in the Expressions of the debugger!!!
(e.g if you are doing "watch" to something like EntityUtils.toString(resEntity))