java.lang.NumberFormatException: Infinity or NaN: NaN at java.math.BigDecimal.(BigDecimal.java:465) at
ua.slon.at.ev.a(Unknown Source) at ua.slon.at.bc.a(Unknown Source) at ua.slon.at.x.afterTextChanged(Unknown Source) at 
android.widget.TextView.sendAfterTextChanged(TextView.java:9289) at android.widget.TextView.setText(TextView.java:5009) at 
android.widget.TextView.setText(TextView.java:4827) at android.widget.EditText.setText(EditText.java:116) at 
android.widget.TextView.setText(TextView.java:4802) at ua.slon.at.bc.a(Unknown Source) at ua.slon.at.w.onItemSelected(Unknown 
Source) at android.widget.AdapterView.fireOnSelected(AdapterView.java:1166) at 
android.widget.AdapterView.dispatchOnItemSelected(AdapterView.java:1155) at 
android.widget.AdapterView.access$300(AdapterView.java:60) at 
android.widget.AdapterView$SelectionNotifier.run(AdapterView.java:1122) at android.os.Handler.handleCallback(Handler.java:739) at 
android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:158) at 
android.app.ActivityThread.main(ActivityThread.java:7231) at java.lang.reflect.Method.invoke(Native Method) at 
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230) at 
com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)

        TextWatcher inputTW = new TextWatcher() {

            public void afterTextChanged(Editable s) {

                if (LookingForViews) {
                    document_line.setValuesFromViews(dialogProduct);
                }
                ((TextView) dialogProduct.findViewById(R.id.txtPopProductSum))
                        .setText(context.getString(R.string.Sum) + ": " + Utils.getCurrencyFormat(document_line.getSum()));
            }

            public void beforeTextChanged(CharSequence s, int start, int count, int after) {
                //To change body of implemented methods use File | Settings | File Templates.
            }

            public void onTextChanged(CharSequence s, int start, int before, int count) {
                //To change body of implemented methods use File | Settings | File Templates.
            }
        };

    public double getSum() {

        double sum_discount = count * price * discount / 100;
        return Utils.getRoundDouble((count * price) - sum_discount, 2);
    }

return new BigDecimal(sourse).setScale(decimal, RoundingMode.HALF_UP).doubleValue();