Android切近实战(三)
16lz
2021-01-26
上一篇，我们看了用户注册，本片我们来看一下系统参数管理，C#版本的界面如下，我记得我在java实战篇也写过这个界面
那么今天我们来看一下Android中是如何实现这个东西。首先先来看一下Service端。
首先是新增加一个asmx。
我们来看一下它内部提供的方法
[WebService(Namespace = "http://tempuri.org/")] [WebServiceBinding(ConformsTo = WsiProfiles.None)] [System.ComponentModel.ToolboxItem(false)] // 若要允许使用 ASP.NET AJAX 从脚本中调用此 Web 服务，请取消注释以下行。 // [System.Web.Script.Services.ScriptService] public class SystemCode : System.Web.Services.WebService { [WebMethod(Description = "添加系统参数")] public CommonResponse AddSystemCode(SystemCodeEntity systemCodeEntity,string userID) { return SystemCodeBiz.GetInstance().AddSystemCode(systemCodeEntity,userID); } [WebMethod(Description = "修改系统参数")] public CommonResponse UpdateSystemCode(SystemCodeEntity systemCodeEntity, string userID) { return SystemCodeBiz.GetInstance().UpdateSystemCode(systemCodeEntity, userID); } [WebMethod(Description = "获取系统参数列表", MessageName = "GetSytemCodeEntityList")] public List GetSytemCodeEntityList() { return SystemCodeBiz.GetInstance().GetSytemCodeEntityList(); } [WebMethod(Description = "获取系统参数列表", MessageName = "GetSytemCodeEntityListByEname")] public List GetSytemCodeEntityList(string ename) { return SystemCodeBiz.GetInstance().GetSytemCodeEntityList(ename); } } 第一个方法是添加系统参数，第二个方法是修改系统参数，第三个方法是获取系统参数列表，第四个方法是根据ename获取系统参数列表。如果不知道什么是ename，请看第一篇。
OK,这四个方法对应的Biz层的代码如下
namespace GRLC.Biz{ public class SystemCodeBiz { static SystemCodeBiz systemCodeBiz = new SystemCodeBiz(); private SystemCodeBiz() { } public static SystemCodeBiz GetInstance() { return systemCodeBiz; } const string moduleName = "SystemCodeModule"; private string GetMessageByName(string msgName) { return CommonFunction.GetMessageByModuleAndName(moduleName, msgName); } private string EnameExists { get { return this.GetMessageByName("EnameHasExists"); } } private string DataHasExists { get { return this.GetMessageByName("DataHasExists"); } } private string AddFailed { get { return this.GetMessageByName("AddFailed"); } } private string UpdateFailed { get { return this.GetMessageByName("UpdateFailed"); } } private string DisplayContentExists { get { return this.GetMessageByName("DisplayContentExists"); } } public CommonResponse AddSystemCode(SystemCodeEntity systemCodeEntity, string userID) { bool isEnameExists = SystemCodeDAL.GetInstance().CheckIfEnameExists(systemCodeEntity.Ename); if (isEnameExists) { return new CommonResponse() { IsSuccess = false, ErrorMessage = EnameExists }; } bool isDataExists = SystemCodeDAL.GetInstance().CheckIfDataExists(systemCodeEntity.Ename, systemCodeEntity.Cname); if (isDataExists) { return new CommonResponse() { IsSuccess = false, ErrorMessage = DataHasExists }; } bool isDisplayContentExists = SystemCodeDAL.GetInstance().CheckIfDisplayContentExists(systemCodeEntity.Ename, systemCodeEntity.DisplayContent); int suc = SystemCodeDAL.GetInstance().AddSystemCode(systemCodeEntity, userID); if (suc > 0) { return new CommonResponse() { IsSuccess = true }; } else { return new CommonResponse() { IsSuccess = false, ErrorMessage = AddFailed }; } } public CommonResponse UpdateSystemCode(SystemCodeEntity systemCodeEntity, string userID) { bool isDisplayContentExists = SystemCodeDAL.GetInstance().CheckIfDisplayContentExists(systemCodeEntity.Ename, systemCodeEntity.DisplayContent); if (isDisplayContentExists) { return new CommonResponse() { IsSuccess = false, ErrorMessage = DisplayContentExists }; } int suc = SystemCodeDAL.GetInstance().UpdateSystemCode(systemCodeEntity, userID); if (suc > 0) { return new CommonResponse() { IsSuccess = true }; } else { return new CommonResponse() { IsSuccess = false, ErrorMessage = UpdateFailed }; } } public List GetSytemCodeEntityList() { return SystemCodeDAL.GetInstance().GetSytemCodeEntityList(); } public List GetSytemCodeEntityList(string ename) { List systemCodeEntityList = this.GetSytemCodeEntityList(); if (systemCodeEntityList != null) { return systemCodeEntityList.Where(s => s.Ename == ename).OrderBy(s => s.Data).ToList(); } return systemCodeEntityList; } }} 对应的DAL层的方法如下
namespace GRLC.DAL{ public class SystemCodeDAL { static SystemCodeDAL systemCodeDAL = new SystemCodeDAL(); private SystemCodeDAL() { } public static SystemCodeDAL GetInstance() { return systemCodeDAL; } public int AddSystemCode(SystemCodeEntity systemCodeEntity, string userID) { using (BonusEntities bonusEntities = new BonusEntities()) { Codes code = new Codes(); code.ename = systemCodeEntity.Ename; code.cname = systemCodeEntity.Cname; code.data = systemCodeEntity.Data; code.display_content = systemCodeEntity.DisplayContent; code.create_time = DateTime.Now; code.lastmodify_date = DateTime.Now; code.lastmodifier = userID; code.create_person = userID; bonusEntities.Codes.Add(code); return bonusEntities.SaveChanges(); } } public int UpdateSystemCode(SystemCodeEntity systemCodeEntity, string userID) { using (BonusEntities bonusEntities = new BonusEntities()) { Codes code = new Codes(); code.ename = systemCodeEntity.Ename; code.cname = systemCodeEntity.Cname; code.data = systemCodeEntity.Data; code.display_content = systemCodeEntity.DisplayContent; code.lastmodify_date = DateTime.Now; code.lastmodifier = userID; bonusEntities.Entry(code).State = EntityState.Modified; return bonusEntities.SaveChanges(); } } public bool CheckIfEnameExists(string ename) { using (BonusEntities bonusEntities = new BonusEntities()) { return bonusEntities.Codes.Any(c => c.ename == ename); } } public bool CheckIfDataExists(string ename, string data) { using (BonusEntities bonusEntities = new BonusEntities()) { return bonusEntities.Codes.Any(c => c.ename == ename && c.data == data); } } public bool CheckIfDisplayContentExists(string ename, string displayContent) { using (BonusEntities bonusEntities = new BonusEntities()) { return bonusEntities.Codes.Any(c => c.ename == ename && c.display_content == displayContent); } } public List GetSytemCodeEntityList() { List systemCodeEntityList = new List(); using (BonusEntities bonusEntities = new BonusEntities()) { SystemCodeEntity systemCodeEntity = null; List codeList = bonusEntities.Codes.ToList(); foreach (var code in codeList) { systemCodeEntity = new SystemCodeEntity(); systemCodeEntity.Cname = code.cname; systemCodeEntity.Ename = code.ename; systemCodeEntity.Data = code.data; systemCodeEntity.DisplayContent = code.display_content; systemCodeEntityList.Add(systemCodeEntity); } } return systemCodeEntityList; } }} OK，完了我们部署Service进行访问
点击第三个方法，如下,输入ename,点击调用
点击调用返回的xml数据如下
OK，这证明我们的service没问题。接下来看android部分，首先从index界面跳到系统参数界面
p_w_picpathBtnSystemCode=(ImageButton)this.findViewById(R.id.p_w_picpathBtnSystemCode); p_w_picpathBtnSystemCode.setOnClickListener(new OnClickListener() { public void onClick(View v) { Intent intent = new Intent(); intent.setClass(index.this,systemcode.class); startActivityForResult(intent, 0); } }); SystemCode界面的代码如下
<?xml version="1.0" encoding="utf-8"?>
只有一个ExpandedListView。在后台代码中，我们首先会初始化数据
public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.systemcode); InitCodesInfo(); } 我们看一下这个InitCodesInfo方法
private void InitCodesInfo() { expandableListView = (ExpandableListView) findViewById(R.id.expandableListView); List> groups = new ArrayList>(); Map root = new HashMap(); root.put("root", "系统参数"); groups.add(root); SoapObject soapChild = null; List enameList = new ArrayList(); Map leaf = null; List> leafList = new ArrayList>(); leaves = new ArrayList>>(); SoapObject soapObject = this.GetSystemCodeList(); for (int i = 0; i < soapObject.getPropertyCount(); i++) { soapChild = (SoapObject) soapObject.getProperty(i); String ename = soapChild.getProperty("Ename").toString(); String cname = soapChild.getProperty("Cname").toString(); if (!enameList.contains(ename)) { leaf = new HashMap(); leaf.put("Key", ename); leaf.put("Name", cname); leafList.add(leaf); enameList.add(ename); } } leaves.add(leafList); SimpleExpandableListAdapter adapter = new SimpleExpandableListAdapter( this, groups, R.layout.expandlist_group, new String[] { "root" }, new int[] { R.id.textGroup }, leaves, R.layout.expandlist_child, new String[] { "Key", "Name" }, new int[] { R.id.textChildID, R.id.textChildName }); expandableListView.setAdapter(adapter); expandableListView.setOnChildClickListener(listener); expandableListView.expandGroup(0); } 在这个方法中首先要看的是GetSystemCodeList方法，这个方法就是调用webservice提供的GetSytemCodeEntityList方法。我们看下代码
private SoapObject GetSystemCodeList() { SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME); SoapSerializationEnvelope soapEnvelope = new SoapSerializationEnvelope( SoapEnvelope.VER11); soapEnvelope.dotNet = true; soapEnvelope.setOutputSoapObject(request); HttpTransportSE httpTS = new HttpTransportSE(URL); soapEnvelope.bodyOut = httpTS; soapEnvelope.setOutputSoapObject(request);// 设置请求参数 try { httpTS.call(SOAP_ACTION, soapEnvelope); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (XmlPullParserException e) { // TODO Auto-generated catch block e.printStackTrace(); } SoapObject result = null; try { result = (SoapObject) soapEnvelope.getResponse(); } catch (SoapFault e) { // TODO Auto-generated catch block e.printStackTrace(); } return result; } NameSpace，MethodName等参数如下
final static String NAMESPACE = "http://tempuri.org/"; final static String METHOD_NAME = "GetSytemCodeEntityList"; final static String SOAP_ACTION = "http://tempuri.org/GetSytemCodeEntityList"; final static String URL = "http://10.0.2.2:2000/SystemCode.asmx?wsdl";
OK，这个掉用完之后，就是构造数据了，我们先看一下图
那么这个listView的数据正是由那个for循环实现的。因为我们只有一个根节点，所以我们只加了一个
root.put("root", "系统参数");
然后接下来我们要构造出下面的子节点，我们把ename当做key，把cname当做value加进HashMap
SimpleExpandableListAdapter adapter = new SimpleExpandableListAdapter( this, groups, R.layout.expandlist_group, new String[] { "root" }, new int[] { R.id.textGroup }, leaves, R.layout.expandlist_child, new String[] { "Key", "Name" }, new int[] { R.id.textChildID, R.id.textChildName }); expandableListView.setAdapter(adapter); expandableListView.setOnChildClickListener(listener); expandableListView.expandGroup(0); 第一个参数是页面本身对象，第二个参数是根节点的数据，第三个参数是展示根节点的布局文件
一个是根节点的布局文件expandlist_group.xml，内容如下
<?xml version="1.0" encoding="utf-8"?>
另一个是子节点的布局文件expandlist_child.xml，内容如下
<?xml version="1.0" encoding="utf-8"?>
第四个参数是根节点的key值root，如果你有很多的根节点，那么这里可以有多个。第五个参数是设置用expandlist_group.xml布局模版中哪个控件来显示根节点的内容。第六个参数是子节点的数据，第七个参数是要展示子节点内容的布局模版。第八个参数是设置要显示的字段，第九个参数每个参数对应的展示控件。OK，最终运行出来的效果如上图所示。
OK，接下来我们看看点击某个子节点，展示其详细内容的界面的部分。先看一下跳转
private OnChildClickListener listener = new OnChildClickListener() { public boolean onChildClick(ExpandableListView parent, View v, int groupPosition, int childPosition, long id) { Object ename = leaves.get(0).get(childPosition).values().toArray()[1]; Intent intent = new Intent(); Bundle bundle = new Bundle(); bundle.putString("ename", ename.toString()); intent.putExtras(bundle); intent.setClass(systemcode.this, systemcodedetail.class); startActivityForResult(intent, 0); finish(); return false; } }; 我们首先会拿到ename，这个ename在这里的话，因为leaves集合中只有一项。所以在这里是get(0)。
然后我们根据position，即第一行就是0，第二行就是1。根据position我们拿到点击的行的数据values。那么values[1]就是ename，values[0]就是cname。
拿到ename直接传到systemcodedetail界面。systemcodedetailUI代码如下
<?xml version="1.0" encoding="utf-8"?>
其后台接收到ename之后会初始化数据
private void InitData() { Bundle bundle = getIntent().getExtras(); String enameValue = bundle.getString("ename"); List> dataList = new ArrayList>(); Map dataMap = null; SoapObject soapObject = this.GetSystemCodeListByEname(enameValue); for (int i = 0; i < soapObject.getPropertyCount(); i++) { SoapObject soapObj = (SoapObject) soapObject.getProperty(i); dataMap = new HashMap(); String displayContent = soapObj.getProperty("DisplayContent") .toString(); String cname = soapObj.getProperty("Cname").toString(); String data = soapObj.getProperty("Data").toString(); dataMap.put("displaycontent", displayContent); dataMap.put("cname", cname); dataMap.put("data", data); dataList.add(dataMap); } SimpleAdapter simpleAdapter = new SimpleAdapter(this, dataList, R.layout.systemcodedetailtemplate, new String[] { "cname", "data", "displaycontent" }, new int[] { R.id.labCname, R.id.labData,R.id.labDisplay }); this.codeListView.setAdapter(simpleAdapter); } 他获取数据的方法是GetSystemCodeListByEname
private SoapObject GetSystemCodeListByEname(String ename) { SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME); PropertyInfo pi = new PropertyInfo(); pi.setName("ename"); pi.setType(String.class); pi.setValue(ename); request.addProperty(pi); SoapSerializationEnvelope soapEnvelope = new SoapSerializationEnvelope( SoapEnvelope.VER11); soapEnvelope.dotNet = true; soapEnvelope.setOutputSoapObject(request); HttpTransportSE httpTS = new HttpTransportSE(URL); soapEnvelope.bodyOut = httpTS; soapEnvelope.setOutputSoapObject(request);// 设置请求参数 try { httpTS.call(SOAP_ACTION, soapEnvelope); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (XmlPullParserException e) { // TODO Auto-generated catch block e.printStackTrace(); } SoapObject result = null; try { result = (SoapObject) soapEnvelope.getResponse(); } catch (SoapFault e) { // TODO Auto-generated catch block e.printStackTrace(); } return result; } 其对应的NameSpace，Method_Name参数如下
final static String NAMESPACE = "http://tempuri.org/"; final static String METHOD_NAME = "GetSytemCodeEntityListByEname"; final static String SOAP_ACTION = "http://tempuri.org/GetSytemCodeEntityListByEname";/* final static String URL = "http://10.0.2.2:2000/SystemCode.asmx?wsdl";*/ final static String URL = "http://172.19.73.18:2000/SystemCode.asmx?wsdl";
OK，在初始化方法中，我们构造出了List
然后通过下面的方法呈现数据到界面
SimpleAdapter simpleAdapter = new SimpleAdapter(this, dataList, R.layout.systemcodedetailtemplate, new String[] { "cname", "data", "displaycontent" }, new int[] { R.id.labCname, R.id.labData,R.id.labDisplay }); this.codeListView.setAdapter(simpleAdapter); 第一个参数当前Activity对象，第二个参数是数据源。第三个参数是展示数据的布局模版。如下
<?xml version="1.0" encoding="utf-8"?>
OK，这个布局使用了相对布局和线性布局的嵌套。第四个参数是指要显示的字段。第五个参数是指分别显示这些字段的控件。OK，跑起来看看效果
效果还凑合，至于修改和删除嘛，请留意下节。
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