I have three ListViews in three tabs A, B and C respectively. All of them obtain data from a common adapter class. However, problem arises when I add search options and try to change list in any tab, say tabA. As soon as I have done it and switch to tabB, the data loaded in tabA is also shown in tabB.
I recognize this is due to using a single BaseAdapter class for all the list Views. Upon tedious searching over the internet, I found this link . This is a limitation to ViewHolder pattern with more view types.
I hope I did not confuse the scene. Could anyone provide a better way out?
How can we handle multiple views with single adapter?
EDIT:
I have three tabs- A, B, C. Each of these tabs is an ActivityGroup class. TabC contains a listView. TabA and TabB has buttons to go to TabC.
XML file of a class in tabC (This is for request coming from Tab A)
<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>
the target class in tabC is
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);
}
}
And in the Handler class, I am setting adapter. Here also I check the valid listView depending on the tab type
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);
}
And the getView method of adpater class is
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;
}
So here is what happens. User clicks the button from TabA or B to TabC. This will add TestClass to current activity of the tab. Using requestID variable, adapter provides different data to TestClass in TabA and TabB. However, if I switch between tabs, all of them have the same value!
Hope I did not confuse. Please ask in case you have queries. What do you think is blocking?
