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上一節我們看了系統參數的主界面，大家應該還有印象，如下
那本節我們來看一下修改和***。
上節我已經介紹了系統參數修改以及***的WebService，如下
其中系統參數修改的描述如下
系統參數***的定義如下
接下來我們需要知道的是如何實現修改和***按鈕的功能。記得上節我們使用系統提供的SimpleAdapter去展示listview的數據。這樣是無法實現按鈕的響應的。所以在實現這兩個按鈕的功能之前，首先需要讓他們能夠響應點擊事件。所以需要我們自己定義Adapter。
public class customAdapter extends BaseAdapter {
private List<Map<String, Object>> dataList;
private LayoutInflater mInflater;
private Context context;
private String[] keyString;
private int[] valueViewID;
Holder holder;
public customAdapter(Context context,
List<Map<String, Object>> dataList, int resource,
String[] from, int[] to) {
this.dataList = dataList;
this.context = context;
mInflater = (LayoutInflater) this.context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
keyString = new String[from.length];
valueViewID = new int[to.length];
System.arraycopy(from, 0, keyString, 0, from.length);
System.arraycopy(to, 0, valueViewID, 0, to.length);
}
@Override
public int getCount() {
return dataList.size();
}
@Override
public Object getItem(int position) {
return dataList.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
public void removeItem(int position) {
dataList.remove(position);
this.notifyDataSetChanged();
}
public View getView(int position, View convertView, ViewGroup parent) {
if (convertView != null) {
holder = (Holder) convertView.getTag();
} else {
convertView = mInflater.inflate(
R.layout.systemcodedetailtemplate, null);
holder = new Holder();
holder.labCname = (TextView) convertView
.findViewById(valueViewID[0]);
holder.labData = (TextView) convertView
.findViewById(valueViewID[1]);
holder.labDisplay = (TextView) convertView
.findViewById(valueViewID[2]);
holder.btnUpdate = (Button) convertView
.findViewById(valueViewID[3]);
holder.btnDelete = (Button) convertView
.findViewById(valueViewID[4]);
convertView.setTag(holder);
}
Map<String, Object> appInfo = dataList.get(position);
if (appInfo != null) {
String cname = appInfo.get(keyString[0]).toString();
String data = appInfo.get(keyString[1]).toString();
String displayContent = appInfo.get(keyString[2]).toString();
holder.labCname.setText(cname);
holder.labData.setText(data);
holder.labDisplay.setText(displayContent);
holder.btnDelete.setOnClickListener(new ViewButtonListener(
position));
holder.btnUpdate.setOnClickListener(new ViewButtonListener(
position));
}
return convertView;
}在構造函數中我們傳入了數據源，得到加載xml布局文件的實例化對象mInflater，以及傳遞進來的數據源Map<String, Object>中的key值，頁面中的元素的id，用來和key值取到的value作對應匹配。
然后再覆蓋BaseAdapter的一些方法。在這里主要看這個getView。
首先判斷是否已經加載了根布局模版，如果已加載，則獲取Holder，否則實例化holder,并將模版內的元素賦給Holder。這個Holder怎么理解呢，我覺得是xml布局模版上元素的載體。通過Holder可以拿到該模版上的任何元素。接下來這個appInfo就是當前界面上listview所選擇的行的數據Map<String, Object>，所以在這里我們可以通過key值拿到value。難道以后將值賦給Holder載體中的各個對應元素
String cname = appInfo.get(keyString[0]).toString(); String data = appInfo.get(keyString[1]).toString(); String displayContent = appInfo.get(keyString[2]).toString(); holder.labCname.setText(cname); holder.labData.setText(data); holder.labDisplay.setText(displayContent);
OK，這個其實就是重寫實現listView的展示。接下來我們來看這次的重點
holder.btnDelete.setOnClickListener(new ViewButtonListener( position)); holder.btnUpdate.setOnClickListener(new ViewButtonListener( position));
這兩個按鈕是我們第一幅圖中的最右邊的兩個操作按鈕。我們分別為其注冊了單擊事件監聽，它的監聽實現類是ViewButtonListener，我們看一下
class ViewButtonListener implements OnClickListener {
private int position;
Object cname;
Object data;
Object displayContent;
EditText txtEname;
EditText txtCname;
EditText txtData;
EditText txtDisplayContent;
EditText txtRemark;
View layout;
ViewButtonListener(int position) {
this.position = position;
cname = dataList.get(position).get("cname");
data = dataList.get(position).get("data");
displayContent = dataList.get(position).get("displaycontent");
LayoutInflater inflater = getLayoutInflater();
layout = inflater.inflate(R.layout.systemcodemodify,
(ViewGroup) findViewById(R.id.modifyDialog));
txtEname = (EditText) layout.findViewById(R.id.txtEname);
txtCname = (EditText) layout.findViewById(R.id.txtCname);
txtData = (EditText) layout.findViewById(R.id.txtData);
txtDisplayContent = (EditText) layout
.findViewById(R.id.txtDisplay);
txtRemark = (EditText) layout.findViewById(R.id.txtRemark);
}
@Override
public void onClick(View view) {
int vid = view.getId();
if (vid == holder.btnUpdate.getId()) {
txtEname.setText(owner.ename);
txtCname.setText(cname.toString());
txtData.setText(data.toString());
txtDisplayContent.setText(displayContent.toString());
txtEname.setEnabled(false);
txtCname.setEnabled(false);
txtData.setEnabled(false);
final AlertDialog.Builder builder = new AlertDialog.Builder(
owner);
builder.setIcon(R.drawable.info);
builder.setTitle(R.string.titleSystemCodeModifyName);
builder.setView(layout);
builder.setPositiveButton(R.string.btnSave, null);
builder.setNegativeButton(R.string.btnClose,null);
final AlertDialog dialog = builder.create();
dialog.show();
dialog.getButton(AlertDialog.BUTTON_POSITIVE)
.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (txtDisplayContent.getText().toString()
.trim().length() == 0) {
ShowMessage("顯示值不能為空!");
return;
}
SoapObject soapObject = new systemcodedetail()
.ModifySystemCode(ename, data
.toString(), txtDisplayContent.getText().toString().trim()
.toString(), txtRemark
.getText().toString());
Boolean isSuccess = Boolean
.valueOf(soapObject.getProperty(
"IsSuccess").toString());
if (isSuccess) {
ShowMessage(R.string.SaveSuccess);
dialog.dismiss();
} else {
String errorMsg = soapObject
.getProperty("ErrorMessage")
.toString();
ShowMessage(errorMsg);
}
}
});
} else if (vid == holder.btnDelete.getId()) {
SoapObject soapObject = new systemcodedetail()
.DeleteSystemCode(ename, data.toString());
Boolean isSuccess = Boolean.valueOf(soapObject.getProperty(
"IsSuccess").toString());
if (isSuccess) {
ShowMessage(R.string.DeleteSuccess);
} else {
String errorMsg = soapObject
.getProperty("ErrorMessage").toString();
ShowMessage(errorMsg);
}
}
}
}
class Holder {
public TextView labCname;
public TextView labDisplay;
public TextView labData;
public Button btnUpdate;
public Button btnDelete;
}
}OK，我們看到了，在構造函數中，我們拿到了各個元素，因為我們的保存和***按鈕的監聽那個實現類都是ViewButtonListener。因此在Onclick事件中，我們需要得知是哪個按鈕觸發了事件。所以先獲取一下id，如果id是btnUpdate。那么就走修改邏輯，否則走***邏輯。
首先來看一下修改邏輯，創建一個dialog，這個dialog加載的是一個activity，彈出的界面是什么呢，在構造函數中有這樣一段
layout = inflater.inflate(R.layout.systemcodemodify, (ViewGroup) findViewById(R.id.modifyDialog));
在創建dialog的時候我們也看到了這句
builder.setView(layout);
所以彈出的界面就是R.layout.systemcodemodfy。我們來看一下這個界面
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:id="@+id/modifyDialog" android:orientation="vertical"> <TableLayout android:id="@+id/tabMain" android:layout_width="fill_parent" android:layout_height="wrap_content" android:padding="3dip" android:stretchColumns="1"> <TableRow> <TextView android:text="@string/labEname" android:textSize="6pt" android:gravity="right" /> <EditText android:id="@+id/txtEname" android:maxLength="25" android:singleLine="true"></EditText> </TableRow> <TableRow> <TextView android:text="@string/labCname" android:textSize="6pt" android:gravity="right" /> <EditText android:id="@+id/txtCname" android:maxLength="50" android:singleLine="true"></EditText> </TableRow> <TableRow> <TextView android:text="@string/labData" android:textSize="6pt" android:gravity="right" /> <EditText android:id="@+id/txtData" android:singleLine="true"></EditText> </TableRow> <TableRow> <TextView android:text="@string/labDisplay" android:textSize="6pt" android:gravity="right" /> <EditText android:id="@+id/txtDisplay" android:singleLine="true"></EditText> </TableRow> <TableRow> <TextView android:text="@string/labRemark" android:textSize="6pt" android:gravity="right" /> <EditText android:id="@+id/txtRemark" android:maxLines="4"></EditText> </TableRow> </TableLayout> <!-- <LinearLayout android:orientation="horizontal"--> <!-- android:gravity="center_horizontal" android:layout_width="fill_parent"--> <!-- android:layout_height="wrap_content">--> <!-- <Button android:id="@+id/btnSave" android:layout_width="110dp"--> <!-- android:layout_height="45dp" android:layout_gravity="center_horizontal"--> <!-- android:text="@string/btnSave" android:textStyle="bold"--> <!-- android:textColor="@color/blue"></Button>--> <!-- <Button android:id="@+id/btnClose" android:layout_width="110dp"--> <!-- android:layout_gravity="center_horizontal" android:layout_height="45dp"--> <!-- android:text="@string/btnClose" android:textStyle="bold"--> <!-- android:textColor="@color/blue"></Button>--> <!-- </LinearLayout>--> </LinearLayout>
OK，就是這個界面，table布局。
再往下看，就是這個setIcon(設置彈出頁圖標)，setTitle(彈出頁標題)，setPostiveButton和setNegativeButton。大家都知道彈出頁在點擊按鈕的時候總是會自動關閉掉，為了解決這一問題，我們的按鈕點擊事件進行了重寫
dialog.getButton(AlertDialog.BUTTON_POSITIVE)
.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {}}在點擊事件中，如果說驗證沒通過，界面不會關閉，否則關閉。我們來看一下效果，界面并沒有關閉。
如果保存成功，則關閉界面
OK，我們接下來看看修改的調用
private SoapObject ModifySystemCode(String ename, String data,
String display, String remark) {
SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME_PUT);
SystemCodeEntity codeEntity = new SystemCodeEntity();
codeEntity.setProperty(0, ename);
codeEntity.setProperty(2, data);
codeEntity.setProperty(3, display);
codeEntity.setProperty(4, remark);
PropertyInfo pi = new PropertyInfo();
pi.setName("systemCodeEntity");
pi.setValue(codeEntity);
pi.setType(codeEntity.getClass());
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);// 設置請求參數
soapEnvelope.addMapping(NAMESPACE, "SystemCodeEntity", codeEntity
.getClass());
try {
httpTS.call(SOAP_ACTION_PUT, 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;
}在這里就不多講了。再看一下***的代碼
private SoapObject DeleteSystemCode(String ename, String data) {
SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME_DELETE);
PropertyInfo pi = new PropertyInfo();
pi.setName("ename");
pi.setType(String.class);
pi.setValue(ename);
request.addProperty(pi);
pi = new PropertyInfo();
pi.setName("data");
pi.setType(String.class);
pi.setValue(data);
SoapSerializationEnvelope soapEnvelope = new SoapSerializationEnvelope(
SoapEnvelope.VER11);
soapEnvelope.dotNet = true;
soapEnvelope.setOutputSoapObject(request);
HttpTransportSE httpTS = new HttpTransportSE(URL);
soapEnvelope.bodyOut = httpTS;
soapEnvelope.setOutputSoapObject(request);// 設置請求參數
try {
httpTS.call(SOAP_ACTION_DELETE, 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;
}OK，本篇到此為止。
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