android:textAlignment 属性

Posted 2021-06-28 aikongmeng

https://developer.android.google.cn/reference/android/view/View?hl=en#attr_android:textAlignment

API 17 时添加的属性,一直没用到过,记录一下这个简单的属性
android:textAlignment 支持以下属性值

Constant	Value	Description
center	4	Center the paragraph, for example: ALIGN_CENTER.
gravity	1	Default for the root view. The gravity determines the alignment, ALIGN_NORMAL, ALIGN_CENTER, or
inherit	0	Default.
textEnd	3	Align to the end of the paragraph, for example: ALIGN_OPPOSITE.
textStart	2	Align to the start of the paragraph, for example: ALIGN_NORMAL.
viewEnd	6	Align to the end of the view, which is ALIGN_RIGHT if the view’s resolved layoutDirection is LTR, and ALIGN_LEFT otherwise.
viewStart	5	Align to the start of the view, which is ALIGN_LEFT if the view’s resolved layoutDirection is LTR, and ALIGN_RIGHT otherwise.

textEnd与viewEnd 的不同,正如上述英文描述的一样,layoutDirection 不一样的时候有所不同
下面展示在设置了 android:textDirection="rtl" 的文字显示效果

android:textAlignment="viewEnd"
android:textDirection="rtl

   android:textAlignment="textEnd"
   android:textDirection="rtl"