final EditText edt1 = new EditText(getActivity());
edt1.setMaxLines(1);
//设置可以输入任意字符
edt1.setInputType(InputType.TYPE_CLASS_TEXT);
//手动设置maxLength为20
InputFilter[] filters = {new InputFilter.LengthFilter(20)};
edt1.setFilters(filters);
edt1.setHint("调整待学单词数");
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