原文:Why am I getting a "0.0" for an empty SQLite field in Java/Android?
代码: 双 IndSRate [] = 新的双 [c.getCount ()]; indSRate [e++] = c.getDouble (c.get ColumnIndex ("s_rate")); 如果 (String. valuef( IndSRate) = null) {log.d ("特殊速率") {log.d ("特殊速率",字符串.valuf (...)