计算器bug

app/src/main/java/com/kuxuan/moneynote/ui/weight/CaculatorLayout.java

 
                 }else {
 
-                    String sumStr = mNumText.getText().toString().trim();
+                    String sumStr = shownumtext;
                     double sumDouble = Double.parseDouble(sumStr);
-                    if(sumDouble==0){
+                    if(sumDouble<=0){
                         return;
                     }
+
                     sum.complete();
 
                 }