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存储一个字符串数组列表变成一个双数组列表？

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

 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;

}
 
 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.

 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;

}

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(",","."));

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08-20 12:09
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