我想创建一个EditText只节选数字，最多有4个数字，并且永远不会窄于仿佛充满了4号这将是（不空当缩小，或有扩大，以容纳4号......是固定的。）

I would like to create an EditText which only excepts numbers, has a maximum of 4 numbers, and is never narrower than it would be if filled with 4 numbers (does not shrink when empty, or have to expand to accommodate 4 numbers... is fixed.)

第2完成用：机器人：inputType =数字和android：最大长度=4。如何设置的最小长度？

The first 2 are accomplished with: android:inputType="number" and android:maxLength="4". How can I set the minimum length?

感谢你。

推荐答案

小的hackish ，但你可以把你的的EditText 在< $ C C>的FrameLayout $旁边另一个的TextView 与文本=0000和的知名度=不可见的。 的FrameLayout 应该有宽度= WRAP_CONTENT 和您的的EditText 将宽度= FILL_PARENT 。照片，应该使之正确的宽度总是这样。

A little hackish, but you can put your EditText inside a FrameLayout alongside with another TextView with text="0000" and visibility=invisible.FrameLayout Should have width=wrap_content and your EditText will have width=fill_parent.That should make it the right width always.

这样做的好处是，它是100％的XML端，没有code参与。

The advantage of this is, it's 100% xml-side, no code involved.