Android:AutoCompleteTextView 在未输入文本时显示建议 [英] Android: AutoCompleteTextView show suggestions when no text entered

问题描述

我正在使用 AutoCompleteTextView，当用户点击它时，即使它没有文本，我也想显示建议 - 但 setThreshold(0) 的工作原理完全相同如 setThreshold(1) - 所以用户必须输入至少 1 个字符才能显示建议.

I am using AutoCompleteTextView, when the user clicks on it, I want to show suggestions even if it has no text - but setThreshold(0) works exactly the same as setThreshold(1) - so the user has to enter at least 1 character to show the suggestions.

推荐答案

这是 记录的行为:

当threshold小于等于0时，阈值为1已申请.

When threshold is less than or equals 0, a threshold of 1 is applied.

您可以通过 showDropDown() 手动显示下拉菜单，因此也许您可以安排在需要时显示它.或者，子类化 AutoCompleteTextView 并覆盖 enoughToFilter()，始终返回 true.

You can manually show the drop-down via showDropDown(), so perhaps you can arrange to show it when you want. Or, subclass AutoCompleteTextView and override enoughToFilter(), returning true all of time.

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