Android 与 Webservice 的快速保存

前面写了一篇android对sqllite的快速保存博客，今天我们来看看android与webservice的交互，相信很多有经验的人自然就想到了soap。但是如果在小型项目中，具有大材小用之嫌。实际上java本身就提供了一套可以与webservice交付的功能，也十分简单。因此对于小型项目而言，我们何不封装一下该方法。

下面我们来看下我们要做的内容：

1）从远程站点上获取数据。

2） 判断数据是否是json格式的，如果是那么我们能不能通过转换将json格式的直接转换为entity返回。如果不是json格式的，那么我们能不能返还回该值。

首先我们来解决第一点,andoird对数据的处理，都是放在多线程上面去所以我们建立一个AsyncTask来管理。

private static class NewsGetTask extends
            AsyncTask<String, IredeemError, String> {

        private ProgressDialog pDialog;

        @Override
        protected void onPreExecute() {
            super.onPreExecute();
             pDialog = new ProgressDialog(MainActivity.getInstance());
             pDialog.setMessage("Please waiting...");
             pDialog.setIndeterminate(false);
             pDialog.setCancelable(true);
             pDialog.show();
        }

        /*
         * (non-Javadoc)
         * 
         * @see android.os.AsyncTask#doInBackground(Params[])
         */
        @Override
        protected String doInBackground(String... params) {

            String url = params[0];    
            
            if(!URLUtil.isValidUrl(url))
            {
                return IredeemApplication.getInstance().getString("UnConnection");
            }
            
            String data = null;
        
            if (requestCache != null) {
                data = requestCache.get(url);
                if (data != null) {
                    return data;
                }
            }
            // initialize HTTP GET request objects
            BasicHttpParams httpParameters = new BasicHttpParams();// Set the timeout in milliseconds until a connection is established.  
            HttpConnectionParams.setConnectionTimeout(httpParameters, 3000);// Set the default socket timeout (SO_TIMEOUT) // in milliseconds which is the timeout for waiting for data.  
            HttpConnectionParams.setSoTimeout(httpParameters, 5000); 
                
            HttpClient httpClient = new DefaultHttpClient(httpParameters);
            HttpGet httpGet = new HttpGet(url);
            HttpResponse httpResponse = null;

            try {
                // execute request
                try {        
                    httpResponse = httpClient.execute(httpGet);
                } catch (UnknownHostException e) {
                    return e.getMessage();
                    // throw wsError;
                } catch (SocketException e) {
                    return e.getMessage();
                    // throw wsError;
                }

                // request data
                HttpEntity httpEntity = httpResponse.getEntity();

                if (httpEntity != null) {
                    InputStream inputStream = httpEntity.getContent();
                    data = convertStreamToString(inputStream);
                    // cache the result
                    
                //    todo: remove out the cash
                    if (requestCache != null) {
                        requestCache.put(url, data);
                    }
                }

            } catch (ClientProtocolException e) {
                return e.getLocalizedMessage();
            } catch (IOException e) {
                return e.getMessage();
            }
            return data;
        }

        protected void onPostExecute(String message) {
            pDialog.dismiss();
        }
    }

我们在线程中率先验证一下URL是不是可用，URLUtil主要就是一个字符串匹配严重是否合法。接着我们设置一下连接的超时时间，然后再Try catch里面去获取该数据，并返回。第一步便完成了。这时候我们需要写个类来调用：调用方法如下：

public static String doGet(String url) {
        try {
             return (new NewsGetTask().execute(url)).get();
        } catch (InterruptedException e) {
            return e.getMessage();
        } catch (ExecutionException e) {
            return e.getMessage();
        }
    }

整合下第一步将全部代码传上来：

package com.iredeem.util;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.SocketException;
import java.net.URL;
import java.net.UnknownHostException;
import java.util.concurrent.ExecutionException;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.params.BasicHttpParams;
import org.apache.http.params.HttpConnectionParams;
import org.json.JSONObject;

import com.iredeem.IredeemApplication;
import com.iredeem.activity.MainActivity;

import android.app.ProgressDialog;
import android.os.AsyncTask;
import android.util.Log;
import android.webkit.URLUtil;

/**
 * @author xie
 */
public class Caller {

    /**
     * Cache for most recent request
     */
    private static RequestCache requestCache = null;

    /**
     * Performs HTTP GET using Apache HTTP Client v 4
     * 
     * @param url
     * @return
     * @throws WSError
     */
    public static String doGet(String url) {
        try {
             return (new NewsGetTask().execute(url)).get();
        } catch (InterruptedException e) {
            return e.getMessage();
        } catch (ExecutionException e) {
            return e.getMessage();
        }
    }
    
    private static Boolean isConnection(String urlString) {
        try {

            URL url = new URL(urlString);
            HttpURLConnection urlc = (HttpURLConnection) url
                    .openConnection();

            urlc.setRequestProperty("User-Agent",
                    "Android Application:***");

            urlc.setRequestProperty("Connection", "close");

            urlc.setConnectTimeout(1000 * 30); // mTimeout is in seconds

            urlc.connect();

            if (urlc.getResponseCode() == 200) {

                return true;
            }

        } catch (MalformedURLException e1) {

            e1.printStackTrace();

        } catch (IOException e) {

            e.printStackTrace();
        }
        return false;
    }

    
    private static class NewsGetTask extends
            AsyncTask<String, IredeemError, String> {

        private ProgressDialog pDialog;

        @Override
        protected void onPreExecute() {
            super.onPreExecute();
             pDialog = new ProgressDialog(MainActivity.getInstance());
             pDialog.setMessage("Please waiting...");
             pDialog.setIndeterminate(false);
             pDialog.setCancelable(true);
             pDialog.show();
        }

        /*
         * (non-Javadoc)
         * 
         * @see android.os.AsyncTask#doInBackground(Params[])
         */
        @Override
        protected String doInBackground(String... params) {

            String url = params[0];    
            
            if(!URLUtil.isValidUrl(url))
            {
                return IredeemApplication.getInstance().getString("UnConnection");
            }
            
            String data = null;
        
            if (requestCache != null) {
                data = requestCache.get(url);
                if (data != null) {
                    return data;
                }
            }
            // initialize HTTP GET request objects
            BasicHttpParams httpParameters = new BasicHttpParams();// Set the timeout in milliseconds until a connection is established.  
            HttpConnectionParams.setConnectionTimeout(httpParameters, 3000);// Set the default socket timeout (SO_TIMEOUT) // in milliseconds which is the timeout for waiting for data.  
            HttpConnectionParams.setSoTimeout(httpParameters, 5000); 
                
            HttpClient httpClient = new DefaultHttpClient(httpParameters);
            HttpGet httpGet = new HttpGet(url);
            HttpResponse httpResponse = null;

            try {
                // execute request
                try {        
                    httpResponse = httpClient.execute(httpGet);
                } catch (UnknownHostException e) {
                    return e.getMessage();
                    // throw wsError;
                } catch (SocketException e) {
                    return e.getMessage();
                    // throw wsError;
                }

                // request data
                HttpEntity httpEntity = httpResponse.getEntity();

                if (httpEntity != null) {
                    InputStream inputStream = httpEntity.getContent();
                    data = convertStreamToString(inputStream);
                    // cache the result
                    
                //    todo: remove out the cash
                    if (requestCache != null) {
                        requestCache.put(url, data);
                    }
                }

            } catch (ClientProtocolException e) {
                return e.getLocalizedMessage();
            } catch (IOException e) {
                return e.getMessage();
            }
            return data;
        }

        protected void onPostExecute(String message) {
            pDialog.dismiss();
        }
    }

    private static String convertStreamToString(InputStream is) {

        BufferedReader reader = new BufferedReader(new InputStreamReader(is));
        StringBuilder sb = new StringBuilder();

        String line = null;
        try {
            while ((line = reader.readLine()) != null) {
                sb.append(line + "
");
            }
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                is.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

        return sb.toString();
    }

    public static void setRequestCache(RequestCache requestCache) {
        Caller.requestCache = requestCache;
    }

    public static String createStringFromIds(int[] ids) {
        if (ids == null)
            return "";

        String query = "";

        for (int id : ids) {
            query = query + id + "+";
        }

        return query;
    }

}

接着我们来解决第二步：

我们先建立一个BaseEntity的基类。

public class BaseEntity implements Serializable {

    private static final long serialVersionUID = 1L;
    
    public static final String DB_NAME = IredeemApplication.DataInformation.DB_NAME;

    private static final String Tag = "Base Entity";

    public<T extends Serializable> void set(Class<T> clazz, String fieldName,Object obj)
    {
        Class<? extends BaseEntity> cls = this.getClass();
        Field filed = null;
        try {
            filed = cls.getField(fieldName);
            filed.set(this, As(clazz, obj));
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    
    public<T extends Serializable> T get(Class<T> clazz, String fieldName) 
    {
        Class<? extends BaseEntity> cls = this.getClass();
        Field filed = null;
        try {
            filed = cls.getField(fieldName);
        } catch (NoSuchFieldException e) {
            e.printStackTrace();
        }
        try {
            return As(clazz, filed.get(this));
        } catch (IllegalArgumentException e) {
            Log.i(Tag, "IllegalArgumentException");
        } catch (IllegalAccessException e) {
            Log.i(Tag, "IllegalAccessException");
        }
        catch (Exception e) {
            Log.i(Tag, "Exception");
        }
        return DefaultAs(clazz);
    }
    
    @SuppressWarnings("unchecked")
    private <T> T DefaultAs(Class<T> clazz)
    {
        if(clazz==String.class)
            return (T)" ";
        if(clazz==double.class)
            return (T)"0";
        if(clazz==int.class)
            return (T)"0";
        if(clazz==Date.class)
            return (T)new java.util.Date();
        return null;
    }
    
    @SuppressWarnings("unchecked")
    private <T> T As(Class<T> clazz, Object object) {
        if(clazz==String.class)
        {
            if(object==null) return null;
            return (T)object.toString();
        }
        if(clazz==double.class)
        {
            if(object==null) object=0;
            object= Double.parseDouble(object.toString());
        }
        return (T)object;
    }
}

这个类可以不要任何东西，这里我是在项目中用到了部分方法，便于大家调试没有挪掉。接着我们建立一个JsonBuilder的接口，用来提供将json转换为entity或者由entity 转换为json。

public interface JSONDataBaseBuilder<TEntity extends BaseEntity> {

    public abstract ContentValues deconstruct(TEntity entity);

    public abstract TEntity jsonBuild(JSONObject jsonObject)
            throws JSONException;

    public interface DataBaseBuilder<TEntity extends BaseEntity> extends
            JSONDataBaseBuilder<BaseEntity> {

        public abstract TEntity build(Cursor query);
        
        public abstract String table();
        
        public abstract TEntity jsonBuild(JSONObject jsonObject) throws JSONException;

    }
}

再来提供一个entity将返回的entity或者message进行组合一下：

public class DBHelperEntity<TEntity extends BaseEntity> {
    public String message;
    public TEntity tEntity;
    public Boolean getIsJsonData()
    {
        if(tEntity==null) return false;
        return true;
    }
    
    public Boolean FormatEntity(String jsonString)
    {
        return true;
    }
}

如果我们返回的是list，那么我们也需要一个entity来封装一下：

public class DBHelperList<TEntity extends BaseEntity> {
    public ArrayList<TEntity> list;
    public String jsonString;
    public String message="";
    public Boolean isURLError = false;
    public DBHelperList(String jsonString)
    {
        this.jsonString = jsonString;
        list = new ArrayList<TEntity>();
    }
    
    public Boolean getIsJSONList()
    {
        if(list!=null && list.size()>0) return true;
        return false;
    }
}

最后我们来封装下service类：

public class JSONServiceBase<TEntity extends BaseEntity> {
    
    private JSONDataBaseBuilder<TEntity> mBuilder;
    private Activity activity;
    
    public JSONServiceBase(Activity activity,JSONDataBaseBuilder<TEntity> builder)
    {
        this.activity = activity;
        mBuilder = builder;
    }
    
    public DBHelperList<TEntity> searchJsonForEntity(String doGetString) {
        String jsonString = doGet(doGetString);
        return new DBHelperList<TEntity>(jsonString);
//        JSONArray jsonArrayEntry = new JSONArray(jsonString); 
//        return jsonArrayEntry;
    }
    
    public DBHelperList<TEntity> getJSonList(String doGetString){
        DBHelperList<TEntity> list = searchJsonForEntity(doGetString);
        try {
             JSONArray jsonArrayEntry = new JSONArray(list.jsonString);
             list.list = getJSonList(jsonArrayEntry);
             return list;
        } catch (JSONException e) {
            list.message = list.jsonString;
            return list;
        } 
    }
    
    public DBHelperList<TEntity> getJSonList(String doGetString,Map<String,String> searchMap)
    {
        return getJSonList(ServiceHelper.getPath(searchMap, doGetString));
    }
    
    public ArrayList<TEntity> getJSonList(JSONArray jsonArrayEntities) {
        
      int n = jsonArrayEntities.length();
      ArrayList<TEntity> entities = new ArrayList<TEntity>();
        
        for(int i=0; i < n; i++){
            try {
                entities.add(mBuilder.jsonBuild(jsonArrayEntities.getJSONObject(i)));
            } catch (JSONException e) {
                e.printStackTrace();
            }
        }    
        return entities;
    }

    public DBHelperEntity<TEntity> getDbHelperEntity(String doGetString)
    {
        String jsonString = doGet(doGetString);
        JSONObject jObject;
        DBHelperEntity<TEntity> rtnEntity = new DBHelperEntity<TEntity>();
        try {
            try {
                jObject = new JSONObject(jsonString);
            } catch (JSONException e) {
                rtnEntity.message = IredeemApplication.getInstance().getString(jsonString);
                return rtnEntity;
            }
            
             try {
                rtnEntity.tEntity = mBuilder.jsonBuild(jObject);
            } catch (JSONException e) {
                rtnEntity.message = e.getLocalizedMessage();
            }
        } catch (Exception e) {
            rtnEntity.message=e.getMessage();
        }
        
         return rtnEntity;
    }
    
    public DBHelperEntity<TEntity> getDbHelperEntity(String doGetString,Map<String, String> searchMap)
    {
        String jsonString = doGet(ServiceHelper.getPath(searchMap, doGetString));
        JSONObject jObject;
        DBHelperEntity<TEntity> rtnEntity = new DBHelperEntity<TEntity>();
        try {
            try {
                jObject = new JSONObject(jsonString);
            } catch (JSONException e) {
                rtnEntity.message = IredeemApplication.getInstance().getString(jsonString);
                return rtnEntity;
            }
             try {
                rtnEntity.tEntity = mBuilder.jsonBuild(jObject);
            } catch (JSONException e) {
                rtnEntity.message = e.getLocalizedMessage();
            }
        } catch (Exception e) {
            rtnEntity.message=e.getMessage();
        }
         return rtnEntity;
    }
    
    public TEntity SaveJson(String doGetString,TEntity entity)
    {
        return null;
    }    
    
    public List<TEntity> SaveJson(String doGetString,String jsonString)
    {
        return null;
    }
    
    public List<TEntity> SaveJsonList(String doGetString,List<TEntity> list)
    {
        return null;
    }
    
    public List<TEntity> SaveJsonList(String doGetString,String jsonString)
    {
        return null;
    }
    
    private String doGet(String query)
    {
        if(!exists(IredeemApplication.DataInformation.getURL()))
                return "The web address can't be used!";
        
        return Caller.doGet(IredeemApplication.DataInformation.getJSONServiceURL() + query);
    }
    
    private  boolean exists(String URLName) {
         return URLUtil.isValidUrl(URLName);
    }

}

这里几个Save方法没有实现，大家有兴趣的话，可以试着用post方法进行封装。

现在我们要做的就是提供一下数据源以及json跟Entity的具体转换类。

Entity：

public  class Staff extends BaseEntity 
{
    public String CardSN;
    public String StaffName;
    public double MaximumTransaction;
    public Boolean Result;
    public String Message;
    
}

Builder：

public class StaffBuilder implements JSONDataBaseBuilder<Staff> 
{

    @Override
    public ContentValues deconstruct(Staff entity) {
        ContentValues values = new ContentValues();
        values.put("CardSN", entity.CardSN);
        values.put("StaffName", entity.StaffName);
        values.put("MaximumTransaction", entity.MaximumTransaction);
        values.put("Result", entity.Result);
        values.put("Message", entity.Message);
        return values;
    }


    @Override
    public Staff jsonBuild(JSONObject jsonObject)  {
        Staff entity = new Staff();
        try { 
              entity.CardSN = jsonObject.getString("CardSN");
            } 
            catch (JSONException e) {
            }

        try { 
              entity.StaffName = jsonObject.getString("StaffName");
            } 
            catch (JSONException e) {
            }

        try { 
              entity.MaximumTransaction = jsonObject.getDouble("MaximumTransaction");
            } 
            catch (JSONException e) {
                Log.i("StaffBuilder", e.getMessage());
            }

        try { 
              entity.Result = jsonObject.getBoolean("Result");
            } 
            catch (JSONException e) {
            }

        try { 
              entity.Message = jsonObject.getString("Message");
            } 
            catch (JSONException e) {
            }

                
        return entity;
    }
}

现在我们准备工作就完成了。最后我们来调用一下：

获取一个列表。

public DBHelperList<Staff> getArrayList() {

        String url = “www.baidu.com"
        return service.getJSonList(url);
    }

传入参数：

public Boolean login(Staff staff, String password) {
        String url = “url”;
        Map<String, String> map = new HashMap<String, String>();
        map.put("StaffId", staff.CardSN);
        map.put("password", password);
        DBHelperEntity<Staff> rtnStaff = service.getDbHelperEntity(url, map);
        if (rtnStaff.getIsJsonData()) {
            MainActivity.getInstance().AddMemberLoginScreen();
            MainActivity.getInstance().RefreshMenu(rtnStaff.tEntity);
            return true;
        }
        return false;
    }

获得一个实例：

public DBHelperEntity<Terminal> ConfigureService(String serialNo)
    {
            String url = “Youweb site”;
            Map<String, String> map = new HashMap<String, String>();
            map.put("serialNo", serialNo);            
            return service.getDbHelperEntity(url, map);    
    }

简单吧。估计有的读者会觉得在写entity和builder的时候会写大量的代码，那我们何不运用T4建立一个模板让它们自动生成。

<#@ template language="C#" debug="false" hostspecific="true"#>
<#@ include file="EF.Utility.CS.ttinclude"#><#@
 output extension=".cs"#><#

CodeGenerationTools code = new CodeGenerationTools(this);
MetadataLoader loader = new MetadataLoader(this);
CodeRegion region = new CodeRegion(this, 1);
MetadataTools ef = new MetadataTools(this);

string inputFile = @"../Model.edmx";
EdmItemCollection ItemCollection = loader.CreateEdmItemCollection(inputFile);
string namespaceName = code.VsNamespaceSuggestion();

EntityFrameworkTemplateFileManager fileManager = EntityFrameworkTemplateFileManager.Create(this);
WriteHeader(fileManager);

foreach (EntityType entity in ItemCollection.GetItems<EntityType>().OrderBy(e => e.Name))
{
    fileManager.StartNewFile(entity.Name + ".java");

#>
package com.iredeem.db.api;

import com.iredeem.db.BaseEntity;

<#=Accessibility.ForType(entity)#> <#=code.SpaceAfter(code.AbstractOption(entity))#> class <#=code.Escape(entity)#> extends BaseEntity <#=code.StringBefore(" : ", code.Escape(entity.BaseType))#>
{
<#
    
    var propertiesWithDefaultValues = entity.Properties.Where(p => p.TypeUsage.EdmType is PrimitiveType && p.DeclaringType == entity && p.DefaultValue != null);
    var collectionNavigationProperties = entity.NavigationProperties.Where(np => np.DeclaringType == entity && np.ToEndMember.RelationshipMultiplicity == RelationshipMultiplicity.Many);
    var complexProperties = entity.Properties.Where(p => p.TypeUsage.EdmType is ComplexType && p.DeclaringType == entity);
    
    if (propertiesWithDefaultValues.Any() || collectionNavigationProperties.Any() || complexProperties.Any())
    {
#>
    public <#=code.Escape(entity)#>(){    }

<#
    }

    var primitiveProperties = entity.Properties.Where(p => p.TypeUsage.EdmType is PrimitiveType && p.DeclaringType == entity);
    if (primitiveProperties.Any())
    {
        foreach (var edmProperty in primitiveProperties)
        {
            if (edmProperty.Name == "Id") continue;
            WriteProperty(code, edmProperty);
        }
    }


  #>
}
<#
    EndNamespace(namespaceName);
}

foreach (var complex in ItemCollection.GetItems<ComplexType>().OrderBy(e => e.Name))
{
    fileManager.StartNewFile(complex.Name + ".java");
    BeginNamespace(namespaceName, code);
#>


<#=Accessibility.ForType(complex)#> class <#=code.Escape(complex)#>
{
<#
    var complexProperties = complex.Properties.Where(p => p.TypeUsage.EdmType is ComplexType && p.DeclaringType == complex);
    var propertiesWithDefaultValues = complex.Properties.Where(p => p.TypeUsage.EdmType is PrimitiveType && p.DeclaringType == complex && p.DefaultValue != null);
#>
   
}
<#
    EndNamespace(namespaceName);
}

if (!VerifyTypesAreCaseInsensitiveUnique(ItemCollection))
{
    return "";
}

fileManager.Process();

#>
<#+
string GetResourceString(string resourceName)
{
    if(_resourceManager == null)
    {
        _resourceManager = new System.Resources.ResourceManager("System.Data.Entity.Design", typeof(System.Data.Entity.Design.MetadataItemCollectionFactory).Assembly);
    }
    
    return _resourceManager.GetString(resourceName, null);
}
System.Resources.ResourceManager _resourceManager;

void WriteHeader(EntityFrameworkTemplateFileManager fileManager)
{
    fileManager.StartHeader();
#>
//------------------------------------------------------------------------------
// <auto-generated>
// <#=GetResourceString("Template_GeneratedCodeCommentLine1")#>
//
// <#=GetResourceString("Template_GeneratedCodeCommentLine2")#>
// <#=GetResourceString("Template_GeneratedCodeCommentLine3")#>
// </auto-generated>
//------------------------------------------------------------------------------

<#+
    fileManager.EndBlock();
}

void BeginNamespace(string namespaceName, CodeGenerationTools code)
{
        namespaceName = namespaceName;
    CodeRegion region = new CodeRegion(this);
    if (!String.IsNullOrEmpty(namespaceName))
    {
#>
namespace <#=code.EscapeNamespace(namespaceName)#>
{
<#+
        PushIndent(CodeRegion.GetIndent(1));
    }
}


void EndNamespace(string namespaceName)
{
    if (!String.IsNullOrEmpty(namespaceName))
    {
        PopIndent();
#>

<#+
    }
}

void WriteProperty(CodeGenerationTools code, EdmProperty edmProperty)
{
    WriteProperty(PropertyVirtualModifier(Accessibility.ForProperty(edmProperty)),
                  code.Escape(edmProperty.TypeUsage),
                  code.Escape(edmProperty),
                  code.SpaceAfter(Accessibility.ForGetter(edmProperty)),
                  code.SpaceAfter(Accessibility.ForSetter(edmProperty)));
}


void WriteNavigationProperty(CodeGenerationTools code, NavigationProperty navigationProperty)
{
    var endType = code.Escape(navigationProperty.ToEndMember.GetEntityType());
    WriteProperty(PropertyVirtualModifier(Accessibility.ForProperty(navigationProperty)),
                  navigationProperty.ToEndMember.RelationshipMultiplicity == RelationshipMultiplicity.Many ? ("ICollection<" + endType + ">") : endType,
                  code.Escape(navigationProperty),
                  code.SpaceAfter(Accessibility.ForGetter(navigationProperty)),
                  code.SpaceAfter(Accessibility.ForSetter(navigationProperty)));
}

void WriteProperty(string accessibility, string type, string name, string getterAccessibility, string setterAccessibility)
{
#>
    <#=accessibility#> <#=WriteJavaProperty(type)#> <#=name#>;
<#+
}

string WriteJavaProperty(string name)
{
    switch(name)
    {
        case "string":
        return "String";
        break;
        case "DateTime":
        return "Date";
        break;
        case "bool":
        return "boolean";
        break;
        case "decimal":
        return "float";
        break;
        case "Nullable<System.DateTime>":
        case "System.DateTime":
        return "Date";
        break;
        case "Nullable<int>":
        return "int";
        break;
        case "System.Guid":
        return "String";
        break;
        case "Nullable<double>":
        return "double";
        break;
        case "Nullable<bool>":
        return "Boolean";
        break;
        default:
        return name;
        break;
    }
}

string PropertyVirtualModifier(string accessibility)
{
    return accessibility + (accessibility != "private" ? "" : "");
}

bool VerifyTypesAreCaseInsensitiveUnique(EdmItemCollection itemCollection)
{
    var alreadySeen = new Dictionary<string, bool>(StringComparer.OrdinalIgnoreCase);
    foreach(var type in itemCollection.GetItems<StructuralType>())
    {
        if (!(type is EntityType || type is ComplexType))
        {
            continue;
        }

        if (alreadySeen.ContainsKey(type.FullName))
        {
            Error(String.Format(CultureInfo.CurrentCulture, "This template does not support types that differ only by case, the types {0} are not supported", type.FullName));
            return false;
        }
        else
        {
            alreadySeen.Add(type.FullName, true);
        }
    }

    return true;
}
#>

<#@ template language="C#" debug="false" hostspecific="true"#>
<#@ include file="EF.Utility.CS.ttinclude"#><#@
 output extension=".cs"#><#

CodeGenerationTools code = new CodeGenerationTools(this);
MetadataLoader loader = new MetadataLoader(this);
CodeRegion region = new CodeRegion(this, 1);
MetadataTools ef = new MetadataTools(this);

string inputFile = @"../Model.edmx";
EdmItemCollection ItemCollection = loader.CreateEdmItemCollection(inputFile);
string namespaceName = code.VsNamespaceSuggestion();

EntityFrameworkTemplateFileManager fileManager = EntityFrameworkTemplateFileManager.Create(this);
WriteHeader(fileManager);

foreach (EntityType entity in ItemCollection.GetItems<EntityType>().OrderBy(e => e.Name))
{
    fileManager.StartNewFile(entity.Name + "Builder.java");

#>
package com.iredeem.db.builder;

import org.json.JSONException;
import org.json.JSONObject;

import android.content.ContentValues;

import com.iredeem.db.JSONDataBaseBuilder;
import com.iredeem.db.api.<#=code.Escape(entity)#>;

<#=Accessibility.ForType(entity)#> <#=code.SpaceAfter(code.AbstractOption(entity))#>class <#=code.Escape(entity)#>Builder implements JSONDataBaseBuilder<<#=code.Escape(entity)#>> <#=code.StringBefore(" : ", code.Escape(entity.BaseType))#>
{
<#
    var propertiesWithDefaultValues = entity.Properties.Where(p => p.TypeUsage.EdmType is PrimitiveType && p.DeclaringType == entity && p.DefaultValue != null);
    var collectionNavigationProperties = entity.NavigationProperties.Where(np => np.DeclaringType == entity && np.ToEndMember.RelationshipMultiplicity == RelationshipMultiplicity.Many);
    var complexProperties = entity.Properties.Where(p => p.TypeUsage.EdmType is ComplexType && p.DeclaringType == entity);
    
    if (propertiesWithDefaultValues.Any() || collectionNavigationProperties.Any() || complexProperties.Any())
    {
#>
    public <#=code.Escape(entity)#>Builder(){    }
<#
    }
  #>

    @Override
    public ContentValues deconstruct(<#=code.Escape(entity)#> entity) {
        ContentValues values = new ContentValues();
        <#
        var primitiveProperties = entity.Properties.Where(p => p.TypeUsage.EdmType is PrimitiveType && p.DeclaringType == entity);
        if (primitiveProperties.Any()){
        foreach (var edmProperty in primitiveProperties){if (edmProperty.Name == "Id") continue;                    
#>
values.put("<#=edmProperty.Name#>", entity.<#=edmProperty.Name#>);
        <#}
    }
                #>
return values;
    }


    @Override
    public <#=code.Escape(entity)#> jsonBuild(JSONObject jsonObject)  {
        <#=code.Escape(entity)#> entity = new <#=code.Escape(entity)#>();
        <#
        foreach (var edmProperty in primitiveProperties)
        {            
        #>
try { 
              entity.<#=edmProperty.Name#> = jsonObject.<#=WriteJavaProperty(edmProperty,edmProperty.Name)#>("<#=edmProperty.Name#>");
            } 
            catch (JSONException e) {
            }

        <#} #>
        
        return entity;
    }
}



<#
    EndNamespace(namespaceName);
}

foreach (var complex in ItemCollection.GetItems<ComplexType>().OrderBy(e => e.Name))
{
    fileManager.StartNewFile(complex.Name + ".java");
    BeginNamespace(namespaceName, code);
#>


<#=Accessibility.ForType(complex)#> class <#=code.Escape(complex)#>
{
<#
    var complexProperties = complex.Properties.Where(p => p.TypeUsage.EdmType is ComplexType && p.DeclaringType == complex);
    var propertiesWithDefaultValues = complex.Properties.Where(p => p.TypeUsage.EdmType is PrimitiveType && p.DeclaringType == complex && p.DefaultValue != null);
#>
   
}
<#
    EndNamespace(namespaceName);
}

if (!VerifyTypesAreCaseInsensitiveUnique(ItemCollection))
{
    return "";
}

fileManager.Process();

#>
<#+
string GetResourceString(string resourceName)
{
    if(_resourceManager == null)
    {
        _resourceManager = new System.Resources.ResourceManager("System.Data.Entity.Design", typeof(System.Data.Entity.Design.MetadataItemCollectionFactory).Assembly);
    }
    
    return _resourceManager.GetString(resourceName, null);
}
System.Resources.ResourceManager _resourceManager;

void WriteHeader(EntityFrameworkTemplateFileManager fileManager)
{
    fileManager.StartHeader();
#>
//------------------------------------------------------------------------------
// <auto-generated>
// <#=GetResourceString("Template_GeneratedCodeCommentLine1")#>
//
// <#=GetResourceString("Template_GeneratedCodeCommentLine2")#>
// <#=GetResourceString("Template_GeneratedCodeCommentLine3")#>
// </auto-generated>
//------------------------------------------------------------------------------

<#+
    fileManager.EndBlock();
}

void BeginNamespace(string namespaceName, CodeGenerationTools code)
{
        namespaceName = namespaceName;
    CodeRegion region = new CodeRegion(this);
    if (!String.IsNullOrEmpty(namespaceName))
    {
#>
namespace <#=code.EscapeNamespace(namespaceName)#>
{
<#+
        PushIndent(CodeRegion.GetIndent(1));
    }
}


void EndNamespace(string namespaceName)
{
    if (!String.IsNullOrEmpty(namespaceName))
    {
        PopIndent();
#>

<#+
    }
}

string WriteJavaProperty(System.Data.Metadata.Edm.EdmProperty ent,string name)
{
CodeGenerationTools code = new CodeGenerationTools(this);
   var typeName = code.Escape(ent.TypeUsage);
   string rtnVal;
    switch(typeName)
    {
        case "string":
        rtnVal= "String";
        break;
        case "DateTime":
        rtnVal= "Date";
        break;
        case "bool":
        rtnVal= "boolean";
        break;
        case "decimal":
        rtnVal= "Long";
        break;
        case "Nullable<System.DateTime>":
        case "System.DateTime":
        rtnVal= "Date";
        break;
        case "Nullable<int>":
        rtnVal= "Int";
        break;
        case "System.Guid":
        rtnVal= "string";
        break;
        case "Nullable<bool>":
        rtnVal="Boolean";
        break;
        case "Nullable<double>":
        rtnVal="Double";
        break;
        default:
        rtnVal= typeName;
        break;
    }
    rtnVal = rtnVal.Substring(0,1).ToUpper()+rtnVal.Substring(1,rtnVal.Length-1);
    return "get"+rtnVal;
}

string PropertyVirtualModifier(string accessibility)
{
    return accessibility + (accessibility != "private" ? "" : "");
}

bool VerifyTypesAreCaseInsensitiveUnique(EdmItemCollection itemCollection)
{
    var alreadySeen = new Dictionary<string, bool>(StringComparer.OrdinalIgnoreCase);
    foreach(var type in itemCollection.GetItems<StructuralType>())
    {
        if (!(type is EntityType || type is ComplexType))
        {
            continue;
        }

        if (alreadySeen.ContainsKey(type.FullName))
        {
            Error(String.Format(CultureInfo.CurrentCulture, "This template does not support types that differ only by case, the types {0} are not supported", type.FullName));
            return false;
        }
        else
        {
            alreadySeen.Add(type.FullName, true);
        }
    }

    return true;
}

#>

当然如果你说我不用保存到web service，而只是保存在sqllite里面，那么你只需要修改的是call.java其他的就完全不用修改了，方便吧。

到这里对数据保存是不是就不在用过多的去配置了？