我的第一个问题是，在我的活动中，我在适配器中传递金额，以使用它在我的适配器中设置编辑文本值，但它没有显示。 我的第二个问题是当我在适配器中更改编辑文本的值时，当我滚动列表视图时，该值会丢失。
这是我在适配器中的代码：
public class CustomListView_InvoiceList extends BaseAdapter {
private Context mContext;
private List<InvoiceList> invoiceLists;
private float TotalPaymentAmount;
public CustomListView_InvoiceList(Context mContext, List<InvoiceList> invoiceLists, Float totalPaymentAmount) {
this.mContext = mContext;
this.invoiceLists = invoiceLists;
this.TotalPaymentAmount = totalPaymentAmount;
}
public static class ViewHolder {
CheckBox SelectInvoiceCB, PayFull, PayPartial;
TextView SalesInvoiceNo, InvoiceDate, InvoiceAmount, AmountDue, DueDate, CreditMemoID, CreditMemoDate, CreditMemoReason;
LinearLayout LL2, LL3;
EditText TotalAmount;
ImageView CaptureForm;
}
@Override
public View getView(final int position, View view, ViewGroup viewGroup) {
//View v = View.inflate(mContext, R.layout.sales_invoice_custom,null);
final ViewHolder holder;
if (view == null) {
view = View.inflate(mContext, R.layout.sales_invoice_custom, null);
holder = new ViewHolder();
holder.SelectInvoiceCB = (CheckBox) view.findViewById(R.id.selectInvoiceCB);
holder.SalesInvoiceNo = (TextView) view.findViewById(R.id.SINo);
holder.InvoiceDate = (TextView) view.findViewById(R.id.SIDate);
holder.InvoiceAmount = (TextView) view.findViewById(R.id.SIAmount);
holder.AmountDue = (TextView) view.findViewById(R.id.SIAmountDue);
holder.DueDate = (TextView) view.findViewById(R.id.SIdueDate);
holder.PayFull = (CheckBox) view.findViewById(R.id.SIFull);
holder.PayPartial = (CheckBox) view.findViewById(R.id.SIPartial);
holder.TotalAmount = (EditText) view.findViewById(R.id.SITotalAmount);
holder.CreditMemoID = (TextView) view.findViewById(R.id.creditMemoID);
holder.CreditMemoDate = (TextView) view.findViewById(R.id.creditMemoDate);
holder.CreditMemoReason = (TextView) view.findViewById(R.id.creditMemoReason);
holder.LL2 = (LinearLayout) view.findViewById(R.id.ll2);
holder.LL3 = (LinearLayout) view.findViewById(R.id.ll3);
holder.SelectInvoiceCB.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
int getPosition = (Integer) buttonView.getTag(); // Here we get the position that we have set for the checkbox using setTag.
invoiceLists.get(getPosition).setSelectInvoice(buttonView.isChecked()); // Set the value of checkbox to maintain its state.
}
});
holder.PayFull.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
int getPosition = (Integer) buttonView.getTag(); // Here we get the position that we have set for the checkbox using setTag.
invoiceLists.get(getPosition).setPayFull(buttonView.isChecked()); // Set the value of checkbox to maintain its state.
if (holder.PayFull.isChecked()) {
holder.PayPartial.setChecked(false);
}
}
});
holder.PayPartial.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
int getPosition = (Integer) buttonView.getTag(); // Here we get the position that we have set for the checkbox using setTag.
invoiceLists.get(getPosition).setPayPartial(buttonView.isChecked()); // Set the value of checkbox to maintain its state.
if (holder.PayPartial.isChecked()) {
holder.PayFull.setChecked(false);
}
}
});
view.setTag(holder);
view.setTag(R.id.SITotalAmount, holder.TotalAmount);
view.setTag(R.id.selectInvoiceCB, holder.SelectInvoiceCB);
view.setTag(R.id.SIFull, holder.PayFull);
view.setTag(R.id.SIPartial, holder.PayPartial);
} else {
holder = (ViewHolder) view.getTag();
}
InvoicePopulate(view,holder, position);
return view;
}
public void InvoicePopulate(final View view, final ViewHolder holder, final int position) {
dbHelper = new DBHelper(mContext);
Calendar c = Calendar.getInstance();
SimpleDateFormat df1 = new SimpleDateFormat("yyyy-MM-dd");
final String formattedDate = df1.format(c.getTime());
try {
dbHelper.openDataBase();
// LAYOUT VISIBILITY FOR CREDIT MEMOs
try {
if (invoiceLists.get(position).getCredit_Memo_ID().equals(null) || invoiceLists.get(position).getCredit_Memo_ID().isEmpty()
|| invoiceLists.get(position).getCredit_Memo_ID().length() < 1
|| invoiceLists.get(position).getCredit_Memo_ID().trim().equals("")){
holder.CreditMemoID.setVisibility(View.GONE);
holder.CreditMemoDate.setVisibility(View.GONE);
holder.CreditMemoReason.setVisibility(View.GONE);
holder.LL2.setVisibility(View.GONE);
holder.LL3.setVisibility(View.GONE);
} else {
holder.LL2.setVisibility(View.VISIBLE);
holder.LL3.setVisibility(View.VISIBLE);
holder.CreditMemoID.setVisibility(View.VISIBLE);
holder.CreditMemoDate.setVisibility(View.VISIBLE);
holder.CreditMemoReason.setVisibility(View.VISIBLE);
holder.CreditMemoID.setText(invoiceLists.get(position).getCredit_Memo_ID());
holder.CreditMemoDate.setText(invoiceLists.get(position).getCredit_Memo_Date().substring(0,10));
holder.CreditMemoReason.setText(invoiceLists.get(position).getCredit_Memo_Reason());
}
} catch (Exception e) {
e.getMessage();
}
holder.SalesInvoiceNo.setText(invoiceLists.get(position).getSales_Invoice_ID());
holder.InvoiceDate.setText(invoiceLists.get(position).getInvoice_Date());
holder.DueDate.setText(invoiceLists.get(position).getDue_Date());
float invAmount = 0;
invAmount = Math.round(Float.parseFloat(invoiceLists.get(position).getInvoice_Amount())*100.00)/(float)100.00;
holder.InvoiceAmount.setText(String.format("%,.2f",invAmount));
holder.AmountDue.setText(String.format("%,.2f",invAmount));
//holder.InvoiceAmount.setText(invoiceLists.get(position).getInvoice_Amount());
holder.TotalAmount.setTag(position);
holder.SelectInvoiceCB.setTag(position); // This line is important.
holder.PayFull.setTag(position); // This line is important.
holder.PayPartial.setTag(position); // This line is important.
holder.TotalAmount.setText(invoiceLists.get(position).getAmount_Paid());
holder.SelectInvoiceCB.setChecked(invoiceLists.get(position).isSelectInvoice());
holder.PayFull.setChecked(invoiceLists.get(position).isPayFull());
holder.PayPartial.setChecked(invoiceLists.get(position).isPayPartial());
try {
if (invoiceLists.get(position).getAmount_Paid().toString().equals("") ||
invoiceLists.get(position).getAmount_Paid().toString().equals("0.0") ||
Float.parseFloat(invoiceLists.get(position).getAmount_Paid().toString()) < 1) {
invAmount = 0;
invAmountDue = 0;
invAmountPaid = 0;
//invAmount = Float.parseFloat(invoiceLists.get(position).getInvoice_Amount());
invAmount = Math.round(Float.parseFloat(invoiceLists.get(position).getInvoice_Amount())*100.00)/(float)100.00;
invAmountDue = invAmount - invAmountPaid;
Log.e("Without AmountPaid ", "Amount Due : " + String.valueOf(invAmountDue));
} else {
invAmount = 0;
invAmountDue = 0;
invAmountPaid = Math.round(Float.parseFloat(invoiceLists.get(position).getAmount_Paid())*100.00)/(float)100.00;
//invAmount = Float.parseFloat(invoiceLists.get(position).getInvoice_Amount());
invAmount = Math.round(Float.parseFloat(invoiceLists.get(position).getInvoice_Amount())*100.00)/(float)100.00;
invAmountDue = invAmount - invAmountPaid;
Log.e("With AmountPaid ", "Amount Due : " + String.valueOf(invAmountDue));
}
holder.AmountDue.setText(String.format("%,.2f",invAmountDue));
//holder.InvoiceAmount.setText(invoiceLists.get(position).getInvoice_Amount());
} catch (Exception e) {
e.getMessage();
}
/*final float finalInvAmount = invAmountDue;
holder.PayFull.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if (holder.PayFull.isChecked()) {
holder.PayPartial.setChecked(false);
if (holder.SelectInvoiceCB.isChecked()) {
invoiceStatusValue = "PAID_FULL";
holder.TotalAmount.setText(String.valueOf(Math.round(finalInvAmount*100.00)/100.00));
//holder.TotalAmount.setText(holder.InvoiceAmount.getText().toString());
}
}
}
});
holder.PayPartial.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if (holder.PayPartial.isChecked()) {
holder.PayFull.setChecked(false);
if (holder.SelectInvoiceCB.isChecked()) {
invoiceStatusValue = "PAID_PARTIAL";
holder.TotalAmount.setText("0.00");
}
}
}
});*/
if (TotalPaymentAmount >= Float.parseFloat(String.valueOf(invAmountDue))) {
holder.SelectInvoiceCB.setChecked(true);
holder.PayFull.setChecked(true);
holder.PayFull.setClickable(true);
holder.PayPartial.setClickable(true);
holder.TotalAmount.setText(String.valueOf(Math.round(invAmountDue * 100.00) / 100.00));
System.out.println("TotalPaymentAmount: " + TotalPaymentAmount);
System.out.println("invAmountDue: " + invAmountDue);
if (Float.parseFloat(String.valueOf(invAmountDue)) < 1) {
Log.e("Computations : ", TotalPaymentAmount + " + " + String.valueOf(Float.parseFloat(String.valueOf(invAmountDue))));
Log.e("Equals ", "TotalPaymentAmount = " + TotalPaymentAmount);
} else {
TotalPaymentAmount = TotalPaymentAmount - Float.parseFloat(String.valueOf(invAmountDue));
}
} else {
if (TotalPaymentAmount < 1) {
holder.TotalAmount.setText("0.00");
/*holder.PayFull.setClickable(false);
holder.PayPartial.setClickable(false);*/
} else {
holder.SelectInvoiceCB.setChecked(true);
holder.PayPartial.setChecked(true);
holder.PayFull.setClickable(true);
holder.PayPartial.setClickable(true);
holder.TotalAmount.setText(String.valueOf(Math.round(TotalPaymentAmount * 100.00) / 100.00));
if ((TotalPaymentAmount - Float.parseFloat(String.valueOf(invAmountDue))) < 0) {
TotalPaymentAmount = (float) 0.0;
} else {
TotalPaymentAmount = TotalPaymentAmount - Float.parseFloat(String.valueOf(invAmountDue));
}
}
}
} catch (Exception e) {
e.getMessage();
System.out.println("Custom Invoice List: " + e);
} finally {
dbHelper.close();
}
}
答案 0 :(得分：0)
首先，我建议使用RecyclerView而不是ListView，一个简单的实现将避免滚动问题。
我推荐这些链接：
https://developer.android.com/training/material/lists-cards.html
https://developer.android.com/reference/android/support/v7/widget/RecyclerView.html
其次，方法invoicePopulate *在每次创建视图时打开SQLite数据库，这会产生严重的性能问题，因为滚动视图会被重新创建，并且最终会生成多个实例，最终会出现错误，您将无法访问数据库。为此，我建议您先前计算数据并将其传递给已准备好的适配器。
最好使用适配器只显示信息，如果你需要计算之前尝试这样做。