问题描述
我有一个 EditText ,它是十进制的,我使用xml中的 android:maxLength 属性设置了它的长度:
I have an EditText which is decimal and I set its length using android:maxLength property in xml:
<EditText
android:id="@+id/quantity"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:ems="10"
android:inputType="numberDecimal"
android:singleLine="true"
android:maxLength="@integer/quantity_length" />
由于它的长度不仅会在UI xml文件中使用,而且还会在Java类以及其他一些地方使用,所以我想避免以后在更新此值时出现问题,因此我想将长度设置为集中在dimens.xml资源文件中,如下所示:
As its length is going to be used not only in the UI xml file but also in a java class and maybe some other places, I want to avoid problems when I update this value in future, so I want to put the length centralized in the dimens.xml resource file as follows:
dimens.xml
<resources>
<!-- other things -->
<!-- Constants -->
<item name="quantity_length" format="integer" type="integer">10</item>
<!-- other things -->
</resources>
我需要从Java类中读取此值,然后执行:
From a java class I need to read this value so I perform:
TypedValue typedValue = new TypedValue();
this.getResources().getValue(R.integer.quantity_length, typedValue, true);
但是我可以注意到没有方法getInt(),只有getFloat():
but I can notice that there is no method getInt(), only getFloat():
int digitsBefore = typedValue.getFloat();
因此我需要将其获取为整数....如何执行此操作?当然,也许我可以使用getFloat()然后将其转换为整数....但是我不知道这是否是一种优雅的方法...所以有什么主意吗?
so as I need to get it as integer.... how to do this? Of course, maybe I can get it using getFloat() and then casting to integer.... but I do not know if it is an elegant way to do it... so any ideas?
更新:糟糕,我做错了.它是: 整数数量= typedValue.getFloat();
UPDATE:Oooppssss I did a mistake. It is: int quantity = typedValue.getFloat();
代替:
int digitsBefore = typedValue.getFloat();
推荐答案
为什么不将整数存储在 res/integers.xml
Why not store the integer in res/integers.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<integer name="quantity_length">12</integer>
</resources>
并访问代码中的值
int myInteger = getResources().getInteger(R.integer.quantity_length);
或使用XML
android:maxLength="@integer/quantity_length"
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