Android:如何确定TextView中触摸事件位置的字符索引? [英] Android: How to determine character index of a touch event's position in TextView?

问题描述

我有一个带有 OnTouchListener 的 TextView.我想要的是当我得到 MotionEvent 时用户指向的字符索引.有没有办法获得 TextView 的底层字体指标?

I have a TextView with an OnTouchListener. What I want is the character index the user is pointing to when I get the MotionEvent. Is there any way to get to the underlying font metrics of the TextView?

推荐答案

我不知道有一种简单的直接方法可以做到这一点，但您应该能够使用 Paint 对象通过调用 TextView.getPaint()

I am not aware of a simple direct way to do this but you should be able to put something together using the Paint object of the TextView via a call to TextView.getPaint()

一旦你有了画图对象，你就可以通过调用 Paint.getFontMetrics() 来访问底层的 FontMetrices，并可以访问其他函数，比如 Paint.measureText() Paint.getTextBounds() 和 Paint.getTextWidths()用于访问显示文本的实际大小.

Once you have the paint object you will have access to the underlying FontMetrices via a call to Paint.getFontMetrics() and have access to other functions like Paint.measureText() Paint.getTextBounds(), and Paint.getTextWidths() for accessing the actual size of the displayed text.

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