我對Android的功能,其中它得到由TextView
返回的值是 totalcost_venue
,totalcost_apparel
,totalcost_souvenir
和totalcost_caterer
。的TextView不返回任何Android的
將該值轉換爲double,之後我必須添加這些值。但是當特定的TextView
沒有返回任何值時,我遇到了一個錯誤。任何幫助都可以。謝謝!如果臨危空值
double totalcost_venue_finalconverted = Double.parseDouble(totalcost_venue.getText().toString());
double totalcost_apparel_finalconverted = Double.parseDouble(totalcost_apparel.getText().toString());
double totalcost_caterer_finalconverted = Double.parseDouble(totalcost_caterer.getText().toString());
double totalcost_souvenir_finalconverted = Double.parseDouble(totalcost_souvenir.getText().toString());
double total = (totalcost_venue_finalconverted + totalcost_apparel_finalconverted + totalcost_caterer_finalconverted +totalcost_souvenir_finalconverted);
String total_all= Double.toString(total);
totalcost_all.setText(total_all);
String totalcost_final = totalcost_all.getText().toString();
double budget_converted = Double.parseDouble(budget_event);
double totalcost_converted = Double.parseDouble(totalcost_final);
if(budget_converted <= totalcost_converted){
registerErrorMsg.setText(" Oops!! Already exceeded");
:
,以一個NULL值,解決您的問題,您可以添加以下檢查? – Peshal
這些是我的Logcat中的錯誤 02-19 13:04:45.185:E/AndroidRuntime(9456):致命例外:主 02-19 13:04:45.185:E/AndroidRuntime(9456):java.lang .NumberFormatException:無效的雙精度:「」 02-19 13:04:45.185:E/AndroidRuntime(9456):\t at java.lang.StringToReal.invalidReal(StringToReal.java:63) 02-19 13:04:45.185 :E/AndroidRuntime(9456):\t at java.lang.StringToReal.parseDouble(StringToReal.java:248) 02-19 13:04:45.185:E/AndroidRuntime(9456):\t at java.lang.Double.parseDouble (Double.java:295) – user3319349
yup看起來像缺少驗證,您應該檢查該字段是否爲空,並且在嘗試解析爲double之前該字段是否具有double值。 – Peshal