我分别在三个选项卡 A、B 和 C 中有三个 ListView。它们都从一个通用的适配器类中获取数据。但是，当我添加搜索选项并尝试更改任何选项卡（例如 tabA）中的列表时，就会出现问题。一旦我完成并切换到tabB，在tabA中加载的数据也显示在tabB中。
我认识到这是由于对所有列表视图使用单个 BaseAdapter 类。在互联网上进行了繁琐的搜索后，我找到了这个链接。这是具有更多视图类型的 ViewHolder 模式的限制。
我希望我没有混淆场景。谁能提供更好的出路？
我们如何使用单个适配器处理多个视图？
编辑：
我有三个选项卡 - A、B、C。每个选项卡都是一个 ActivityGroup 类。TabC 包含一个列表视图。TabA 和 TabB 具有转到 TabC 的按钮。
tabC 中类的 XML 文件（用于来自 Tab A的请求）
<LinearLayout
android:id="@+id/linearLayout1"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<ListView
android:id="@+id/enquiryListViewA"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="7dp" >
</LinearLayout>
tabC 中的目标类是
public class TestClass extends Activity {
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if(0 == Constants.requestID) { //requestID is used to identify the tab
//request from tab A
setContentView(R.layout.custom_fullpicture_A);
} else { //request from tab B
setContentView(R.layout.custom_fullpicture_B);
}
}
在 Handler 类中，我正在设置适配器。在这里，我还根据选项卡类型检查有效的 listView
if(0 == Constants.requestID) {
ListView enquiryView = (ListView) ((Activity) childContext).findViewById(R.id.enquiryListViewA);
adapterA = new CustomFullPictureAdapter(childContext, msg.obj);
enquiryView.setAdapter(adapterA);
} else {
ListView enquiryView = (ListView) ((Activity) childContext).findViewById(R.id.enquiryListViewB);
adapterB = new CustomFullPictureAdapter(childContext, msg.obj);
enquiryView.setAdapter(adapterB);
}
而adpater类的getView方法是
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
System.out.println("Full Picture adapter: CONVERT VIEW : :: " + convertView);
System.out.println("Data count from DB :: " + getCount());
int viewType = Constants.requestID;
View viewAccounts = null;
View viewCM = null;
View view = null;
View masterView = null;
if(viewType == 0) {
viewAccounts = convertView;
} else if(viewType == 1) {
viewCM = convertView;
} else {
view = convertView;
}
if(viewAccounts == null) {
holder = new ViewHolder();
if(!Constants.isLoggedInCustomer) { //logged in as user
viewAccounts = mInflater.inflate(R.layout.custom_fullpicturerow_A, null);
holder.salesCostAcc = (TextView) viewAccounts.findViewById(R.id.vSalesCostAcc);
holder.profitAcc = (TextView) viewAccounts.findViewById(R.id.vProfitAcc);
holder.gpAcc = (TextView) viewAccounts.findViewById(R.id.vGpAcc);
holder.salesValueAcc = (TextView) viewAccounts.findViewById(R.id.vSalesValueAcc);
holder.quantityAcc = (TextView) viewAccounts.findViewById(R.id.vQuantityAcc);
holder.transactionCountAcc = (TextView) viewAccounts.findViewById(R.id.vTransAcc);
holder.avgPriceAcc = (TextView) viewAccounts.findViewById(R.id.vAvgPriceAcc);
holder.objectNameAcc = (TextView) viewAccounts.findViewById(R.id.vObjectNameAcc);
holder.objectCodeAcc = (TextView) viewAccounts.findViewById(R.id.vObjectCodeAcc);
holder.salesValueAcc.setText(searchArrayList.get(position).getSalesValue());
holder.quantityAcc.setText(searchArrayList.get(position).getQuantity());
holder.transactionCountAcc.setText(searchArrayList.get(position).getTransactionCount());
holder.avgPriceAcc.setText(searchArrayList.get(position).getAvgPrice());
holder.objectNameAcc.setText(searchArrayList.get(position).getObjectName());
holder.objectCodeAcc.setText(searchArrayList.get(position).getObjectCode());
holder.salesCostAcc.setText(searchArrayList.get(position).getSalesCost());
holder.profitAcc.setText(searchArrayList.get(position).getProfit());
holder.gpAcc.setText(searchArrayList.get(position).getProfitMargin());
masterView = viewAccounts;
viewAccounts.setTag(holder);
} else {
}
}
if(view == null) {
holder = new ViewHolder();
if(!Constants.isLoggedInCustomer) { //logged in as user
viewCM = mInflater.inflate(R.layout.custom_fullpicturerow_B, null);
holder.salesCost = (TextView) viewCM.findViewById(R.id.vSalesCost);
holder.profit = (TextView) viewCM.findViewById(R.id.vProfit);
holder.gp = (TextView) viewCM.findViewById(R.id.vGp);
holder.salesValue = (TextView) viewCM.findViewById(R.id.vSalesValue);
holder.quantity = (TextView) viewCM.findViewById(R.id.vQuantity);
holder.transactionCount = (TextView) viewCM.findViewById(R.id.vTrans);
holder.avgPrice = (TextView) viewCM.findViewById(R.id.vAvgPrice);
holder.objectName = (TextView) viewCM.findViewById(R.id.vObjectName);
holder.objectCode = (TextView) viewCM.findViewById(R.id.vObjectCode);
holder.salesValue.setText(searchArrayList.get(position).getSalesValue());
holder.quantity.setText(searchArrayList.get(position).getQuantity());
holder.transactionCount.setText(searchArrayList.get(position).getTransactionCount());
holder.avgPrice.setText(searchArrayList.get(position).getAvgPrice());
holder.objectName.setText(searchArrayList.get(position).getObjectName());
holder.objectCode.setText(searchArrayList.get(position).getObjectCode());
holder.salesCost.setText(searchArrayList.get(position).getSalesCost());
holder.profit.setText(searchArrayList.get(position).getProfit());
holder.gp.setText(searchArrayList.get(position).getProfitMargin());
masterView = viewCM;
viewCM.setTag(holder);
} else {
}
}
if(null != masterView)
holder = (ViewHolder) masterView.getTag();
if(0 == position % 2)
masterView.setBackgroundResource(R.color.textColorWhite);
else
masterView.setBackgroundResource(R.color.textColorCyan);
return masterView;
}
这就是发生的事情。用户单击从 TabA 或 B 到 TabC 的按钮。这会将 TestClass 添加到选项卡的当前活动中。使用 requestID 变量，适配器在 TabA 和 TabB 中向 TestClass 提供不同的数据。但是，如果我在选项卡之间切换，它们都具有相同的值！
希望我没有混淆。如果您有疑问，请询问。你认为什么是阻塞？