如何为android取消firebase setValue（）的意图(How to cancel firebase setValue() intentionaly for android)

 您的帖子有相互矛盾的陈述： 
 
1. how to access variable from a static class?  
 
 您的代码没有定义静态类，而是一个与ABC类同名的静态方法。 
 
2. static method that has same name as class `ABC`.
 
 如果您认为这是创建静态类的方式，那就错了。 静态类只能是外部类的内部。 
 
3. tempabc = abc.
 
 即使您定义了一个静态类，访问非静态变量也不是这样的。 除非变量也是静态的，否则您需要创建静态类的实例并以适当的方式访问变量值。 
 
 回答你发布的第二部分 ： 
 您应该定义一个类来封装所述字段，如下所示： 
 
class HighestData {
    String names;  
    int hours;  
    int minutes;  
    int seconds;  
    int clicks;  

    // define setter, getter methods or a constructor with input params for above fields.
}
 
 将方法从void更改return object of HighestData 。 
 
public static HighestData ReadHighestScoreFile() throws IOException {  
    // your code here  
    // ...  
    HighestData data = new HighestData();  
    data.setName( name );  
    data.setHours( out.readInt() );  
    data.setMinutes( out.readInt() );  
    data.setSeconds( out.readInt() );  
    data.setClicks( out.readInt() );  
    // ...  
    return data;  
}  
 
 ReadHighestScoreFile()方法的调用者现在可以处理HighestData对象并使用它进一步处理。 
 
 最后但重要的是，与C不同，您无法在Java中定义本地静态字段。 他们必须在班级。 

Your posting has conflicting statements: 
 
1. how to access variable from a static class?  
 
Your code does not have a static class defined but a static method with same name as class ABC. 
 
2. static method that has same name as class `ABC`.
 
If you are thinking that it is the way creating a static class, it is wrong. Static classes can only be inner to Outer classes. 
 
3. tempabc = abc.
 
Even if you define a static class, accessing non static variables is not in this way. Unless the variable too is a static, you require to create an instance of the static class and access the variable value in an appropriate way.
 
Answer to second part of your posting:
 You should define a class to encapsulate the said fields as defined below: 
 
class HighestData {
    String names;  
    int hours;  
    int minutes;  
    int seconds;  
    int clicks;  

    // define setter, getter methods or a constructor with input params for above fields.
}
 
Change method from void to return object of HighestData. 
 
public static HighestData ReadHighestScoreFile() throws IOException {  
    // your code here  
    // ...  
    HighestData data = new HighestData();  
    data.setName( name );  
    data.setHours( out.readInt() );  
    data.setMinutes( out.readInt() );  
    data.setSeconds( out.readInt() );  
    data.setClicks( out.readInt() );  
    // ...  
    return data;  
}  
 
The caller of ReadHighestScoreFile() method can now have handle to HighestData object and use it to process further. 
 
Lastly but important that, unlike in C, you can't define local static fields in Java. They must be at class level.