First I'm assuming that the URL is accessible on the network, if so you need to make sure that:
A) The device is on the same network (e.g. same wifi router) B) The app has the android.permission.INTERNET permission " I have seen to use 10.0.2.2 instead of localhost".. not sure what you mean by this.. but of course localhost wouldn't work because presumably the server is not running on the device :/ On Sunday, November 20, 2011 10:40:50 AM UTC-8, mark kelly wrote: > > Hi > Im trying to connect to a mysql database which is on localhost. i get > the error: > > Error in http connection > org.apache.http.conn.HttpHostConnectException: Connection to > http://10.0.2.2 > refused > > The code is: > > package com.test.poll; > > import java.io.BufferedReader; > import java.io.InputStream; > import java.io.InputStreamReader; > import java.util.ArrayList; > > import org.apache.http.HttpEntity; > import org.apache.http.HttpResponse; > import org.apache.http.NameValuePair; > 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.json.JSONArray; > import org.json.JSONException; > import org.json.JSONObject; > > import android.app.Activity; > import android.os.Bundle; > import android.util.Log; > import android.widget.Toast; > > public class Poll extends Activity { > InputStream is; > @Override > public void onCreate(Bundle savedInstanceState) { > super.onCreate(savedInstanceState); > setContentView(R.layout.main); > String result = ""; > //the year data to send > ArrayList<NameValuePair> nameValuePairs = new > ArrayList<NameValuePair>(); > nameValuePairs.add(new BasicNameValuePair("year","1990")); > > //http post > try{ > HttpClient httpclient = new DefaultHttpClient(); > HttpPost httppost = new HttpPost("http://10.0.2.2/ > android/getAllPeopleBornAfter.php"); > httppost.setEntity(new > UrlEncodedFormEntity(nameValuePairs)); > HttpResponse response = httpclient.execute(httppost); > HttpEntity entity = response.getEntity(); > is = entity.getContent(); > Log.e("log_tag", "connection success "); > Toast.makeText(getApplicationContext(), "pass", > Toast.LENGTH_SHORT).show(); > }catch(Exception e){ > Log.e("log_tag", "Error in http connection > "+e.toString()); > Toast.makeText(getApplicationContext(), > "failed"+e.toString(), Toast.LENGTH_SHORT).show(); > > } > //convert response to string > try{ > BufferedReader reader = new BufferedReader(new > InputStreamReader(is,"iso-8859-1"),8); > StringBuilder sb = new StringBuilder(); > String line = null; > while ((line = reader.readLine()) != null) { > sb.append(line + "\n"); > Toast.makeText(getApplicationContext(), > "pass", Toast.LENGTH_SHORT).show(); > } > is.close(); > > result=sb.toString(); > }catch(Exception e){ > Log.e("log_tag", "Error converting result > "+e.toString()); > Toast.makeText(getApplicationContext(), > "failed"+e.toString(), Toast.LENGTH_SHORT).show(); > > } > > //parse json data > try{ > JSONArray jArray = new JSONArray(result); > for(int i=0;i<jArray.length();i++){ > JSONObject json_data = jArray.getJSONObject(i); > Log.i("log_tag","id: "+json_data.getInt("id")+ > ", name: "+json_data.getString("name") > + > ", sex: "+json_data.getInt("sex")+ > ", birthyear: > "+json_data.getInt("birthyear") > ); > Toast.makeText(getApplicationContext(), > "pass", Toast.LENGTH_SHORT).show(); > } > > }catch(JSONException e){ > Log.e("log_tag", "Error parsing data "+e.toString()); > Toast.makeText(getApplicationContext(), > "failed"+e.toString(), Toast.LENGTH_SHORT).show(); > } > } > } > > I have a php script to connect to the database but the app isn't > getting that far. Is the url string right? I have seen to use 10.0.2.2 > instead of localhost....but its not working for me... > > -- -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en --- You received this message because you are subscribed to the Google Groups "Android Developers" group. To unsubscribe from this group and stop receiving emails from it, send an email to android-developers+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
