我有一个包含项目名称和价格的 ListView ，我编写了代码，因此当我单击一个项目时，它会在屏幕底部的一个小对话框中显示其价格，但现在当我单击另一个项目时，我想添加该项目商品的价格到第一个商品的价格，依此类推..
这是我现在的代码:
@Override
public View getView(final int position, final View convertView, ViewGroup parent) // inflating the layout and initializing widgets
{
View rowView = convertView;
ViewHolder viewHolder = null;
if (rowView == null) {
LayoutInflater inflater = getLayoutInflater();
rowView = inflater.inflate(R.layout.listcontent, parent, false);
viewHolder = new ViewHolder();
viewHolder.textName = rowView.findViewById(R.id.name);
viewHolder.textData = rowView.findViewById(R.id.details);
viewHolder.textImage = rowView.findViewById(R.id.price);
viewHolder.producticon = rowView.findViewById(R.id.producticon);
rowView.setTag(viewHolder);
} else {
viewHolder = (ViewHolder) convertView.getTag();
}
// here setting up names and images
viewHolder.textName.setText(parkingList.get(position).getProname() + "");
viewHolder.textData.setText(parkingList.get(position).getData());
viewHolder.textImage.setText(parkingList.get(position).getImage());
Picasso.with(context).load(parkingList.get(position).getProducticon()).into(viewHolder.producticon);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, final int position, long id) {
//What happens when you click on a place!
// Intent intent = new Intent(LoggedIn.this,MapsActivity.class);
// startActivity(intent);
final int count = 0;
LayoutInflater inflater2 = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
final Dialog mBottomSheetDialog = new Dialog(context, R.style.MaterialDialogSheet);
View content = inflater2.inflate(R.layout.activity_main2, null);
mBottomSheetDialog.setContentView(content);
TextView textView = (TextView) content.findViewById(R.id.mebuyss);
final TextView itemcount = (TextView) content.findViewById(R.id.itemcount);
Button plus = (Button) content.findViewById(R.id.plus);
Button minus = (Button) content.findViewById(R.id.minus);
Button finish = (Button) content.findViewById(R.id.finishgettingitem);
textView.setText(parkingList.get(position).getProname());
plus.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
counter = counter + 1;
itemcount.setText(String.valueOf(counter));
}
});
minus.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
counter --;
if(counter<0){
counter=0;
}
itemcount.setText(String.valueOf(counter));
}
});
final Dialog mBottomSheetDialog2 = new Dialog(context, R.style.MaterialDialogSheet);
final View content2 = inflater2.inflate(R.layout.smalldialog, null);
final TextView total = (TextView) content2.findViewById(R.id.totalpriceofsmalldialog);
total.setText(null);
finish.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String get = itemcount.getText().toString();
Float last = Float.parseFloat(get) * Float.parseFloat(parkingList.get(position).getImage());
mBottomSheetDialog.dismiss();
mBottomSheetDialog2.setContentView(content2);
mBottomSheetDialog2.setCancelable(false);
mBottomSheetDialog2.getWindow().setLayout(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT);
mBottomSheetDialog2.getWindow().setGravity(Gravity.BOTTOM);
total.setText(String.valueOf(last));
mBottomSheetDialog2.show();
mBottomSheetDialog2.getWindow().clearFlags(WindowManager.LayoutParams.FLAG_DIM_BEHIND);
mBottomSheetDialog2.getWindow().setFlags(WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL,
WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL);
doneonce = true;
}
});
// if (doneonce = true){
// Float priceofitem = parseFloat(parkingList.get(position).getImage());
// Float currentprice = parseFloat(total.getText().toString());
// Float finalfloat = priceofitem * currentprice;
// total.setText(String.valueOf(finalfloat));
//
// }
mBottomSheetDialog.setCancelable(true);
mBottomSheetDialog.getWindow().setLayout(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT);
mBottomSheetDialog.getWindow().setGravity(Gravity.BOTTOM);
if (!mBottomSheetDialog.isShowing()){
counter = 1;
}
//
mBottomSheetDialog.show();
}
});
return rowView;
}
我尝试使用 boolean 值，但它没有达到我的预期。 我将不胜感激任何帮助!
最佳答案
所有代码(getView() 方法)都在 ArrayAdapter 类中吗？如果是这样，请将您的监听器注册移到您的 Activity 中，然后监听器只需从所选项目中提取所需的值并将其附加到您的 Activity 类的属性中，然后引发 View 以显示运行总计。
关于java - 在 Android ListView 中添加商品价格，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/61510352/