我试图实现一个项目计数器，我有两个按钮（+和 - ），在这两个按钮的中间我有一个textView来检查数量，同时增加或降低它，但因为这是一个textView它应该让我介绍数量，例如，如果我单击textView我想能够自己放置值，但是在引入值并单击Ok时，它重新启动到1这是默认值。另一件事是，如果我使用（+和 - ）按钮增加值，当我单击textView时它会重置为1并且它不会使用按钮保存我增加的值。
XML代码：
<EditText
android:id="@+id/col_etSetQuantity"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical|center_horizontal"
android:paddingLeft="15dip"
android:paddingRight="15dip"
android:text="1"
android:textSize="14dip"
android:textStyle="bold"
android:saveEnabled="false"
android:inputType="number"
/>
这是我对此视图的适配器：
final EditText edQuantity = (EditText) convertView.findViewById(R.id.col_etSetQuantity);
int quantity = items.get(position).getQuantity();
edQuantity.setText(String.valueOf(quantity));
final TextView tvTotal = (TextView) convertView.findViewById(R.id.col_priceTotal);
double total = cost * quantity;
String formattedTotal;
if(total == 0) {
formattedTotal = "Total: " + Constants.DOM_CURRENCY + "0";
} else {
formattedTotal = String.format("%,.2f", total);
formattedTotal = "Total: " + Constants.DOM_CURRENCY + formattedTotal;
}
tvTotal.setText(formattedTotal);
Button btLower = (Button) convertView.findViewById(R.id.col_btnLowerQuantity);
Button btIncrease = (Button) convertView.findViewById(R.id.col_btnIncreaseQuantity);
itemsEdited.get(position).setQuantity(quantity);
itemsEdited.get(position).setAmount(total);
btIncrease.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
int quantity = increaseQuantity(position, edQuantity);
itemsEdited.get(position).setQuantity(quantity);
double total = setTotalPrice(tvTotal,
products.get(position).getUnitPrice(), quantity);
itemsEdited.get(position).setAmount(total);
}
});
btLower.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
int quantity = lowerQuantity(position, edQuantity);
itemsEdited.get(position).setQuantity(quantity);
double total = setTotalPrice(tvTotal,
products.get(position).getUnitPrice(), quantity);
itemsEdited.get(position).setAmount(total);
}
});
return convertView;
}
/**
* Se ejecuta cuando se presiona el botón del (-), para disminuir la cantidad de un producto
*/
public int lowerQuantity(int position, EditText setQuanitityBtn) {
Integer currentQuantity = Integer.parseInt(setQuanitityBtn.getText().toString());
int newQuantity = 1;
if(currentQuantity > 1)
{
newQuantity = currentQuantity - 1;
setQuanitityBtn.setText(String.valueOf(newQuantity));
}
return newQuantity;
}
/**
* Se ejecuta cuando se presiona el botón del (+), para aumentar la cantidad de un producto
*/
public int increaseQuantity(int position, EditText setQuanitityBtn) {
Integer currentQuantity = Integer.parseInt(setQuanitityBtn.getText().toString());
int newQuantity = 1;
if(currentQuantity < products.get(position).getQuantityOnHand())
{
newQuantity = currentQuantity + 1;
setQuanitityBtn.setText(String.valueOf(newQuantity));
} else {
Toast t = Toast.makeText(context, "Ya ha seleccionado la cantidad máxima en existencia", Toast.LENGTH_SHORT);
t.show();
}
return newQuantity;
}
public double setTotalPrice(TextView column, double cost, int quantity) {
double total = cost * quantity;
String formattedTotal = String.format("%,.2f", total);
formattedTotal = "Total: " + Constants.DOM_CURRENCY + formattedTotal;
column.setText(formattedTotal);
return total;
}
}