在Android EditText中，如何强制大写? [英] In Android EditText, how to force writing uppercase?

问题描述

在我的Android应用程序中，我有不同的EditText，用户可以在其中输入信息.但是我需要强迫用户以大写字母书写. 您知道执行此操作的功能吗?

In my Android application I have different EditText where the user can enter information. But I need to force user to write in uppercase letters. Do you know a function to do that?

推荐答案

Android实际上有一个为此内置了InputFilter ！

Android actually has a built-in InputFilter just for this!

edittext.setFilters(new InputFilter[] {new InputFilter.AllCaps()});

请注意，setFilters 将重置通过XML设置的所有其他属性(即maxLines，inputType，imeOptinos ...).为了防止这种情况，请将您的过滤器添加到已经存在的过滤器中.

Be careful, setFilters will reset all other attributes which were set via XML (i.e. maxLines, inputType,imeOptinos...). To prevent this, add you Filter(s) to the already existing ones.

InputFilter[] editFilters = <EditText>.getFilters();
InputFilter[] newFilters = new InputFilter[editFilters.length + 1];
System.arraycopy(editFilters, 0, newFilters, 0, editFilters.length);
newFilters[editFilters.length] = <YOUR_FILTER>;  
<EditText>.setFilters(newFilters);

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