java.lang.NoClassDefFoundError：无法解决以下问题：Ljava / time / LocalDate; 错误

Question

我尝试了一切，但错误仍未解决

这是我的代码：

public String[] getWeekDays() {

    LocalDate today = LocalDate.now();
    LocalDate monday = today;
    LocalDate tue = today;
    LocalDate wed = today;
    LocalDate thur = today;
    LocalDate fri = today;
    LocalDate sat = today;
    LocalDate sunday = today;
    while (sunday.getDayOfWeek() != DayOfWeek.SUNDAY){
        sunday = sunday.minusDays(1);
     }
     while (monday.getDayOfWeek() != DayOfWeek.MONDAY){
        monday = monday.minusDays(1);
     }
     while (tue.getDayOfWeek() != DayOfWeek.TUESDAY){
        tue = tue.plusDays(1);
     }
     while (wed.getDayOfWeek() != DayOfWeek.WEDNESDAY){
        wed = wed.plusDays(1);
     }
     while (thur.getDayOfWeek() != DayOfWeek.THURSDAY){
        thur = thur.plusDays(1);
     }
     while (fri.getDayOfWeek() != DayOfWeek.FRIDAY){
        fri = fri.plusDays(1);
     }
     while (sat.getDayOfWeek() != DayOfWeek.SATURDAY){
        sat = sat.plusDays(1);
     }

     String[] days = {String.valueOf(sunday),String.valueOf(monday), String.valueOf(tue), String.valueOf(wed),
                String.valueOf(thur), String.valueOf(fri), String.valueOf(sat)};
    return days;
}

我已编写代码以获取一个星期的日期。当我运行此代码时，LocalDate.now（）;出现错误。该错误是“ java.lang.NoClassDefFoundError：无法解决以下问题：Ljava / time / LocalDate;”。我已经在网上搜索了。有人说它要求API级别至少为27。我对API 27级别感到厌倦，但该错误未得到解决。我的目标设备更多地是我需要在此API级别上运行的API 26。并且还尝试添加“编译” java.time：LocalTime：1.8“”。这一项也不起作用。请帮我...

Answer 1

NoClassDefFoundError-如果Java虚拟机或ClassLoader实例尝试加载类的定义（作为常规方法调用的一部分或使用新表达式创建新实例的一部分），则抛出该错误，并且找不到该类的定义。

LocalDate today = LocalDate.now(); // Added 1.8

读 LocalDate

确保，您已在build.gradle部分中添加了此内容。

compileOptions {
    sourceCompatibility JavaVersion.VERSION_1_8
    targetCompatibility JavaVersion.VERSION_1_8
    }

费耶

java.time 包仅在API 26中添加。

所以，你应该设置

 minSdkVersion 26

之后，Clean-Rebuild-Gradle。