http://blog.csdn.net/knxw0001/article/details/9053655
mNameEt.setError(“请输入姓名”);
mNameEt.setFocusable(true);
mNameEt.requestFocus();
!text.equals(“”)&&!text.equalsIgnoreCase(“null”))
equalsIgnoreCase 不区分大小写
android-edit布局-不弹出软键盘
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