Android Open Source - City-Outdoors-Android Base Call

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License

The source code is released under:

Copyright (c) 2012, Edinburgh Council All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are ...

Java Source Code

package uk.co.jarofgreen.cityoutdoors.API;
/*from w ww.  j a  va2  s .  c o m*/
import org.apache.http.client.HttpClient;

import java.io.File;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.net.SocketException;
import java.net.UnknownHostException;

import android.content.Context;
import android.content.SharedPreferences;
import android.preference.PreferenceManager;
import android.sax.Element;
import android.sax.EndTextElementListener;
import android.sax.RootElement;
import android.sax.StartElementListener;
import android.util.Log;
import android.util.Xml;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.conn.HttpHostConnectException;
import org.apache.http.entity.mime.HttpMultipartMode;
import org.apache.http.entity.mime.MultipartEntity;
import org.apache.http.entity.mime.content.FileBody;
import org.apache.http.entity.mime.content.StringBody;
import org.apache.http.impl.client.DefaultHttpClient;
import org.xml.sax.Attributes;

import uk.co.jarofgreen.cityoutdoors.OurApplication;
import uk.co.jarofgreen.cityoutdoors.R;
/**
 * 
 * @author James Baster  <james@jarofgreen.co.uk>
 * @copyright City of Edinburgh Council & James Baster
 * @license Open Source under the 3-clause BSD License
 * @url https://github.com/City-Outdoors/City-Outdoors-Android
 */
public abstract class BaseCall {
  
  InformationNeededFromContext informationNeededFromContext;
  
  public BaseCall(InformationNeededFromContext informationNeededFromContext) {
    super();
    this.informationNeededFromContext = informationNeededFromContext;
  }

  public BaseCall(Context context, OurApplication ourApplication) {
    super();
    this.informationNeededFromContext = new InformationNeededFromContext(context, ourApplication);
  }
  
  protected String errorMessage;
  protected String errorCode;
  
  protected HttpClient httpclient;
  protected HttpPost httppost;
  protected MultipartEntity multipartEntity;
  protected HttpResponse response;
  protected HttpEntity entity;
  protected InputStream  is;
  protected boolean isUserTokenAttached = false;
  
  protected void setUpCall(String url) {
    httpclient = new DefaultHttpClient();                      
    httppost = new HttpPost(informationNeededFromContext.getServerURL() + url);
    multipartEntity = new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE);  

    int userID = informationNeededFromContext.getSettings().getInt("userID", -1);
    if (userID > 0) {
      addDataToCall("userID", userID);
      addDataToCall("userToken", informationNeededFromContext.getSettings().getString("userToken",""));
      isUserTokenAttached = true;
    }    
  }
  
  protected void addDataToCall(String key, String value) {
    if (value != null) {
      try {
        multipartEntity.addPart(key, new StringBody(value));
      } catch (UnsupportedEncodingException e) {
        e.printStackTrace();
      }
    }
  }

  protected void addDataToCall(String key, Integer value) {
    if (value != null) {
      try {
        multipartEntity.addPart(key, new StringBody(Integer.toString(value)));
      } catch (UnsupportedEncodingException e) {
        e.printStackTrace();
      }
    }
  }

  protected void addDataToCall(String key, Float value) {
    if (value != null) {
      try {
        multipartEntity.addPart(key, new StringBody(Float.toString(value)));
      } catch (UnsupportedEncodingException e) {
        e.printStackTrace();
      }
    }
  }
  
  protected void addFileToCall(String key, String fileName) {
    multipartEntity.addPart(key, new FileBody(new File(fileName)));
  }
  
  protected void makeCall(RootElement root) {
    Element errorTag = root.getChild("error");
    errorTag.setStartElementListener(new StartElementListener(){
        public void start(Attributes attributes) {
          errorCode = attributes.getValue("code");
        }
          });
    errorTag.setEndTextElementListener(new EndTextElementListener(){
      public void end(String body) {
        errorMessage = body;
      }
    }); 

    try {
      httppost.setEntity(multipartEntity);
      response = httpclient.execute(httppost);
      entity = response.getEntity();
      is = entity.getContent();   

      Xml.parse(is, Xml.Encoding.UTF_8, root.getContentHandler());
    } catch (SocketException e) {
      errorCode = "A1";
      errorMessage = "Can not connect to internet";
    } catch (UnknownHostException e) {
      errorCode = "A2";
      errorMessage = "Can not connect to internet";      
    } catch (Exception e) {
      throw new RuntimeException(e);
    }
  }

  public boolean hasError() {
    return (errorMessage != null) || (errorCode != null) ;
  }
  
  
  public String getErrorMessage() {
    return errorMessage;
  }

  public String getErrorCode() {
    return errorCode;
  }
  
  
  
}

Java Source Code List

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