android - TextView的样式和android :textAppearance attributes?有什么区别

Question

如果我将 TextView 定义为:

 <TextView
        style="@android:style/TextAppearance.DeviceDefault.Large"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello World!" />

和做的基本一样:

 <TextView
        android:textAppearance="@android:style/TextAppearance.DeviceDefault.Large"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello World!" />

我知道 style 是某种更广泛的限定符(即不能在 android:textAppearance 中设置所有属性)，但它提出了一个问题:为什么要打扰?与 style 相比，使用 android:textAppearance 有什么优势吗？

Answer 1

来自样式和主题 https://developer.android.com/guide/topics/ui/look-and-feel/themes#textappearance

One limitation with styles is that you can apply only one style to a View. In a TextView, however, you can also specify a TextAppearance attribute which functions similarly to a style

TextAppearance allows you to define text-specific styling while leaving a View’s style available for other uses. Note, however, that if you define any text attributes directly on the View or in a style, those values would override the TextAppearance values.