存储一个字符串数组列表变成一个双数组列表？ [英] storing a string arraylist into a double arraylist?
本文介绍了存储一个字符串数组列表变成一个双数组列表？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我有一个字符串数组列表中包含的 [51073，51074，51073] 现在我想将其转换成双的ArrayList 和计算数组列表中的数的和
下面是code：
私人的ArrayList＆LT;字符串＆GT;总访问量=新的ArrayList＆LT;＆GT;（）;
私人的ArrayList＆LT;双＆GT; demototal =新的ArrayList＆LT;＆GT;（）;
字符串总= itemData.getString（ParseBar code.KEY_TOTAL）;
totals.add（总）;
/ *转换所有值总计数组翻一番，增加ArrayList的demototal * /
的for（int i = 0; I＆LT; totals.size（）;我++）{
最终的字符串值= totals.get（我）;
双total_ary = Double.parseDouble（值）;
demototal.add（total_ary）;
}
字符串金额=+ setArrayListElement（demototal）;
textViewSum.setText（金额）; //设置总文本达
//计算量下面我们通过setArrayListElement为双数组列表
私人双setArrayListElement（ArrayList中inArray）{
双量= 0.0D;
的for（int i = 0; I＆LT; inArray.size（）;我++）{
金额=量+ Double.valueOf（（双人间）inArray.get（一））;
}
返回量;
}
这给了我 java.lang.NumberFormatException：无效的双：51073除了
有关更清楚，我加入了一些更code。
私人无效showItem（JSON字符串）{
字符串itembar code =;
字符串itemdesc =;
串重量=;
字符串率=;
字符串决策=;
字符串netrate =;
字符串总=;
尝试 {
的JSONObject的JSONObject =新的JSONObject（JSON）;
JSONArray结果= jsonObject.getJSONArray（ParseBar code.JSON_ARRAY）;
的JSONObject的ItemData = result.getJSONObject（0）;
itembar code = itemData.getString（ParseBar code.KEY_BAR code）;
itemdesc = itemData.getString（ParseBar code.KEY_DESC）;
体重= itemData.getString（ParseBar code.KEY_WEIGHT）;
率= itemData.getString（ParseBar code.KEY_RATE）;
制作= itemData.getString（ParseBar code.KEY_MAKING）;
netrate = itemData.getString（ParseBar code.KEY_NETRATE）;
总= itemData.getString（ParseBar code.KEY_TOTAL）;
}赶上（JSONException E）{
e.printStackTrace（）;
}
//表开始
TableLayout.LayoutParams tableParams =新TableLayout.LayoutParams（TableLayout.LayoutParams.MATCH_PARENT，TableLayout.LayoutParams.WRAP_CONTENT）;
TableRow.LayoutParams rowParams =新TableRow.LayoutParams（TableRow.LayoutParams.MATCH_PARENT，TableRow.LayoutParams.WRAP_CONTENT，1F）;
rowParams.setMargins（16，0，16，0）;
TableLayout tableLayout =新TableLayout（AddInvEst.this）;
tableLayout.setLayoutParams（tableParams）;
的TableRow NEWROW =新的TableRow（AddInvEst.this）;
newRow.setLayoutParams（tableParams）;
酒吧code =新的TextView（AddInvEst.this）;
酒吧code.setLayoutParams（rowParams）;
酒吧code.setGravity（Gravity.CENTER）;
itemDesc =新的TextView（AddInvEst.this）;
itemDesc.setLayoutParams（rowParams）;
itemDesc.setGravity（Gravity.CENTER）;
weightLine =新的TextView（AddInvEst.this）;
weightLine.setLayoutParams（新TableRow.LayoutParams（TableRow.LayoutParams.MATCH_PARENT，TableRow.LayoutParams.WRAP_CONTENT，0.75f））;
weightLine.setGravity（Gravity.CENTER）;
rateAmount =新的EditText（AddInvEst.this）;
rateAmount.setLayoutParams（新TableRow.LayoutParams（TableRow.LayoutParams.MATCH_PARENT，TableRow.LayoutParams.WRAP_CONTENT，0.5F））;
rateAmount.setGravity（Gravity.CENTER）;
rateAmount.addTextChangedListener（rateTextWatcher）;
makingAmount =新的EditText（AddInvEst.this）;
makingAmount.setLayoutParams（新TableRow.LayoutParams（TableRow.LayoutParams.MATCH_PARENT，TableRow.LayoutParams.WRAP_CONTENT，0.5F））;
makingAmount.setGravity（Gravity.CENTER）;
makingAmount.addTextChangedListener（mkAmountTextWatcher）;
netRate =新的TextView（AddInvEst.this）;
netRate.setLayoutParams（新TableRow.LayoutParams（TableRow.LayoutParams.MATCH_PARENT，TableRow.LayoutParams.WRAP_CONTENT，0.5F））;
netRate.setGravity（Gravity.CENTER）;
netrates.add（netrate）;
itemtotal =新的TextView（AddInvEst.this）;
itemtotal.setLayoutParams（rowParams）;
itemtotal.setGravity（Gravity.CENTER）;
totals.add（总）;
//将来自总额阵列中的所有值加倍，并添加到ArrayList的demototal
的for（int i = 0; I＆LT; totals.size（）;我++）{
最终的字符串值= totals.get（我）;
双total_ary = Double.parseDouble（value.replace（，，。））;
demototal.add（total_ary）;
}
酒吧code.setText（itembar code）;
itemDesc.setText（itemdesc）;
weightLine.setText（重量）;
rateAmount.setText（率）;
makingAmount.setText（制作）;
netRate.setText（netrate）;
itemtotal.setText（总）;
字符串金额=+ setArrayListElement（demototal）;
textViewSum.setText（金额）; //设置总文本达
newRow.addView（酒吧code）;
newRow.addView（itemDesc）;
newRow.addView（weightLine）;
newRow.addView（rateAmount）;
newRow.addView（makingAmount）;
newRow.addView（netRate）;
newRow.addView（itemtotal）;
itemTable.addView（NEWROW）;
}
//计算量下面我们通过setArrayListElement为双数组列表
私人双setArrayListElement（ArrayList中inArray）{
双量= 0.0D;
的for（int i = 0; I＆LT; inArray.size（）;我++）{
金额=量+ Double.valueOf（（双人间）inArray.get（一））;
}
返回量;
}
这是在$ C $下textwatcher和计算netrate和项目总和。
私人无效calculateAndShow（双重量，双RT，双MK）{
。字符串W = weightLine.getText（）的toString（）;
重量= Double.parseDouble（瓦特）;
双NetRate = RT + MK;
双总=（NetRate / 10）*重量;
netRate.setText（NetRate +）;
itemtotal.setText（共+）;
}
私人TextWatcher rateTextWatcher =新TextWatcher（）{
@覆盖
公共无效beforeTextChanged（CharSequence中，诠释开始，诠释计数，之后INT）{
}
@覆盖
公共无效onTextChanged（CharSequence中，诠释开始，诠释之前，诠释计数）{
}
@覆盖
公共无效afterTextChanged（编辑S）{
字符串率= rateAmount.getText（）的toString（）。
RT = Double.parseDouble（率）;
calculateAndShow（重量，RT，MK）;
rates.add（率）;
}
};
私人TextWatcher mkAmountTextWatcher =新TextWatcher（）{
@覆盖
公共无效beforeTextChanged（CharSequence中，诠释开始，诠释计数，之后INT）{
}
@覆盖
公共无效onTextChanged（CharSequence中，诠释开始，诠释之前，诠释计数）{
}
@覆盖
公共无效afterTextChanged（编辑S）{
字符串mkAmt = makingAmount.getText（）的toString（）。
MK = Double.parseDouble（mkAmt）;
calculateAndShow（重量，RT，MK）;
mkCharges.add（mkAmt）;
}
};
解决方案
您不能使用，在你的价值解析为双
尝试：
双total_ary = Double.parseDouble（value.replace（），）;
I have a string arraylist with numbers like ["51,073","51,074","51,073"] now i want to convert this into a Double ArrayList and calculate the sum of the numbers in the array list.
Here is the code :
private ArrayList<String> totals = new ArrayList<>();
private ArrayList<Double> demototal = new ArrayList<>();
String total = itemData.getString(ParseBarcode.KEY_TOTAL);
totals.add(total);
/*converting all values from totals array to Double and add to arraylist demototal*/
for (int i = 0; i < totals.size(); i++) {
final String value = totals.get(i);
double total_ary = Double.parseDouble(value);
demototal.add(total_ary);
}
String amount = ""+setArrayListElement(demototal);
textViewSum.setText(amount);//set total text to amount
//calculate amount here we pass setArrayListElement as Double arraylist
private Double setArrayListElement(ArrayList inArray) {
Double amount = 0.0d;
for (int i = 0; i < inArray.size(); i++) {
amount = amount + Double.valueOf((Double) inArray.get(i));
}
return amount;
}
This gives me java.lang.NumberFormatException: Invalid double: "51,073" exception.
For more clarity I am adding some more code.
private void showItem(String json) {
String itembarcode = "";
String itemdesc = "";
String weight = "";
String rate = "";
String making = "";
String netrate = "";
String total = "";
try {
JSONObject jsonObject = new JSONObject(json);
JSONArray result = jsonObject.getJSONArray(ParseBarcode.JSON_ARRAY);
JSONObject itemData = result.getJSONObject(0);
itembarcode = itemData.getString(ParseBarcode.KEY_BARCODE);
itemdesc = itemData.getString(ParseBarcode.KEY_DESC);
weight = itemData.getString(ParseBarcode.KEY_WEIGHT);
rate = itemData.getString(ParseBarcode.KEY_RATE);
making = itemData.getString(ParseBarcode.KEY_MAKING);
netrate = itemData.getString(ParseBarcode.KEY_NETRATE);
total = itemData.getString(ParseBarcode.KEY_TOTAL);
} catch (JSONException e) {
e.printStackTrace();
}
//table started
TableLayout.LayoutParams tableParams = new TableLayout.LayoutParams(TableLayout.LayoutParams.MATCH_PARENT, TableLayout.LayoutParams.WRAP_CONTENT);
TableRow.LayoutParams rowParams = new TableRow.LayoutParams(TableRow.LayoutParams.MATCH_PARENT, TableRow.LayoutParams.WRAP_CONTENT, 1f);
rowParams.setMargins(16, 0, 16, 0);
TableLayout tableLayout = new TableLayout(AddInvEst.this);
tableLayout.setLayoutParams(tableParams);
TableRow newRow = new TableRow(AddInvEst.this);
newRow.setLayoutParams(tableParams);
barCode = new TextView(AddInvEst.this);
barCode.setLayoutParams(rowParams);
barCode.setGravity(Gravity.CENTER);
itemDesc = new TextView(AddInvEst.this);
itemDesc.setLayoutParams(rowParams);
itemDesc.setGravity(Gravity.CENTER);
weightLine = new TextView(AddInvEst.this);
weightLine.setLayoutParams(new TableRow.LayoutParams(TableRow.LayoutParams.MATCH_PARENT, TableRow.LayoutParams.WRAP_CONTENT, 0.75f));
weightLine.setGravity(Gravity.CENTER);
rateAmount = new EditText(AddInvEst.this);
rateAmount.setLayoutParams(new TableRow.LayoutParams(TableRow.LayoutParams.MATCH_PARENT, TableRow.LayoutParams.WRAP_CONTENT, 0.5f));
rateAmount.setGravity(Gravity.CENTER);
rateAmount.addTextChangedListener(rateTextWatcher);
makingAmount = new EditText(AddInvEst.this);
makingAmount.setLayoutParams(new TableRow.LayoutParams(TableRow.LayoutParams.MATCH_PARENT, TableRow.LayoutParams.WRAP_CONTENT, 0.5f));
makingAmount.setGravity(Gravity.CENTER);
makingAmount.addTextChangedListener(mkAmountTextWatcher);
netRate = new TextView(AddInvEst.this);
netRate.setLayoutParams(new TableRow.LayoutParams(TableRow.LayoutParams.MATCH_PARENT, TableRow.LayoutParams.WRAP_CONTENT, 0.5f));
netRate.setGravity(Gravity.CENTER);
netrates.add(netrate);
itemtotal = new TextView(AddInvEst.this);
itemtotal.setLayoutParams(rowParams);
itemtotal.setGravity(Gravity.CENTER);
totals.add(total);
//converting all values from totals array to Double and add to arraylist demototal
for (int i = 0; i < totals.size(); i++) {
final String value = totals.get(i);
double total_ary = Double.parseDouble(value.replace(",","."));
demototal.add(total_ary);
}
barCode.setText(itembarcode);
itemDesc.setText(itemdesc);
weightLine.setText(weight);
rateAmount.setText(rate);
makingAmount.setText(making);
netRate.setText(netrate);
itemtotal.setText(total);
String amount = ""+setArrayListElement(demototal);
textViewSum.setText(amount);//set total text to amount
newRow.addView(barCode);
newRow.addView(itemDesc);
newRow.addView(weightLine);
newRow.addView(rateAmount);
newRow.addView(makingAmount);
newRow.addView(netRate);
newRow.addView(itemtotal);
itemTable.addView(newRow);
}
//calculate amount here we pass setArrayListElement as Double arraylist
private Double setArrayListElement(ArrayList inArray) {
Double amount = 0.0d;
for (int i = 0; i < inArray.size(); i++) {
amount = amount + Double.valueOf((Double) inArray.get(i));
}
return amount;
}
This is the code for textwatcher and calculating the netrate and item total.
private void calculateAndShow(double wt, double rt, double mk) {
String w = weightLine.getText().toString();
wt = Double.parseDouble(w);
double NetRate = rt + mk;
double Total = (NetRate / 10) * wt;
netRate.setText(NetRate + "");
itemtotal.setText(Total + "");
}
private TextWatcher rateTextWatcher = new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
}
@Override
public void afterTextChanged(Editable s) {
String rate = rateAmount.getText().toString();
rt = Double.parseDouble(rate);
calculateAndShow(wt, rt, mk);
rates.add(rate);
}
};
private TextWatcher mkAmountTextWatcher = new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
}
@Override
public void afterTextChanged(Editable s) {
String mkAmt = makingAmount.getText().toString();
mk = Double.parseDouble(mkAmt);
calculateAndShow(wt, rt, mk);
mkCharges.add(mkAmt);
}
};
解决方案
You cant use a , in your value to parse to a double
Try:
double total_ary = Double.parseDouble(value.replace(",","."));
这篇关于存储一个字符串数组列表变成一个双数组列表？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
查看全文
