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打印枚举的名称

发布于 2024-12-25 15:42:23 字数 330 浏览 3 评论 0 原文

我在 Ubuntu 上使用 eclipse + Android SDK。

我想打印传感器类型设备的名称，有很多他们，我想自动完成。

如果我使用 a，

Log.d("SENSORTYPE","Type: " + tempSensor.getType())

我会打印 (int) 类型，但我想要枚举的名称。

我怎么能这么做呢？

原文

I'm using eclipse + Android SDK on Ubuntu.

I would like to print the name of a sensor type device, there a a lot of them and I want to do it automatically.

If I use a

Log.d("SENSORTYPE","Type: " + tempSensor.getType())

I print the (int) type, but I would like the name of the enum.

How could I do that?

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打小就很酷 2025-01-01 15:42:24

您可以引入一个abstract方法并在每个枚举中实现它。

enum Colour {

Red {

    @Override
    String colourName() {
        return "Red";
    }
};

abstract String colourName();
}

这种方式为您提供了更大的灵活性，例如，如果您不想显示其编程名称

you can introduce an abstract method and implement it in every enumeration

enum Colour {

Red {

    @Override
    String colourName() {
        return "Red";
    }
};

abstract String colourName();
}

This way gives you more flexibility, for example, if you don't want to display its programmatic name

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三人与歌 2025-01-01 15:42:24

Log.d("SENSORNAME", "NAME: " + tempSensor.name());

Log.d("SENSORNAME", "NAME: " + tempSensor.name());

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彩虹直至黑白 2025-01-01 15:42:23

对于枚举，您可以获取所有常量的数组，并使用如下代码轻松循环它们：

for(YourEnum value: YourEnum.values()){
    System.out.println("name="+value.name());
}

但是，Sensor 类不是枚举，而是包含常量列表。如果不指定所有常量名称，则无法像枚举一样以编程方式循环该列表。

但是，您可以创建一个静态查找，将整数映射到要使用的字符串值，例如

Map<Integer,String> lookup = new HashMap<Integer,String>();
lookup.put(TYPE_ACCELEROMETER,"Accelerometer");
//Code a put for each TYPE, with the string you want to use as the name

您可以这样使用：

Log.d("SENSORTYPE","Type: " + lookup.get(tempSensor.getType()));

这种方法确实意味着您仍然需要写出每个常量，并在常量发生变化时更新列表，但您只需要做一次。将查找包装在某种辅助方法或类中是一个好主意，具体取决于您想要重用它的范围。

For enumerations, you can obtain an array of all the constants and loop over them very easily using code such as this:

for(YourEnum value: YourEnum.values()){
    System.out.println("name="+value.name());
}

However, the Sensor class you link to isn't an enumeration, but contains a list of constants. There's no way to programatically loop over that list like an enumeration without specifying all the constants names.

However, you can create a static lookup that maps the ints to the String value you want to use, for example

Map<Integer,String> lookup = new HashMap<Integer,String>();
lookup.put(TYPE_ACCELEROMETER,"Accelerometer");
//Code a put for each TYPE, with the string you want to use as the name

You can use this like this:

Log.d("SENSORTYPE","Type: " + lookup.get(tempSensor.getType()));

This approach does mean you still have to write out each constant and update the list if the constants change, but you only have to do it once. It'd be a good idea to wrap the lookup in some kind of helper method or class depending on how widely you want to reuse it.

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