对于那些只需要在资源中保存一些int值的人，您可以执行以下操作。

integers.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <integer name="default_value">100</integer>
</resources> 

Code

int defaultValue = getResources().getInteger(R.integer.default_value);

Context.getResources().getDimension(int id);

如果你只是想动态改变字体大小，那么你可以:

textView.setTextSize(TypedValue.COMPLEX_UNIT_PX, resources.getDimension(R.dimen.tutorial_cross_marginTop))

正如@achie的回答，你可以像这样从dimensions .xml中获取dp:

val dpValue = (resources.getDimension(R.dimen.tutorial_cross_marginTop)/ resources.displayMetrics.density).toInt()

或者得到这样的sp

val spValue = (resources.getDimension(R.dimen.font_size)/ resources.displayMetrics.scaledDensity).toInt()

关于Resources.java #{getDimension}

    /**
     * Retrieve a dimensional for a particular resource ID.  Unit 
     * conversions are based on the current {@link DisplayMetrics} associated
     * with the resources.
     * 
     * @param id The desired resource identifier, as generated by the aapt
     *           tool. This integer encodes the package, type, and resource
     *           entry. The value 0 is an invalid identifier.
     * 
     * @return Resource dimension value multiplied by the appropriate 
     * metric.
     * 
     * @throws NotFoundException Throws NotFoundException if the given ID does not exist.
     *
     * @see #getDimensionPixelOffset
     * @see #getDimensionPixelSize
     */

资源维度值乘以相应的值

资源类也有一个方法getDimensionPixelSize()，我认为将满足您的需求。

你可以使用getDimensionPixelOffset()而不是getDimension，所以你不必强制转换为int。

int valueInPixels = getResources().getDimensionPixelOffset(R.dimen.test)

我为此用kotlin编写了两个helper函数

/**
 * Gets the float value defined in dimens
 * Define float value as following
 * Example:
 * <item name="example" format="float" type="dimen">1.0</item>
 */
fun Resources.getFloatDimension(dimensResourceId: Int): Float {
    val outValue = TypedValue()
    this.getValue(dimensResourceId, outValue, true)
    return outValue.float
}

/**
 * Gets the dp value defined in dimens
 * Example:
 * <dimen name="example">12dp</dimen>
 *
 * Will return 12
 */
fun Resources.getDimensionInDp(dimensResourceId: Int): Int {
    return (getDimension(dimensResourceId) / displayMetrics.density).toInt()
}