This file contains ambiguous Unicode characters that may be confused with others in your current locale. If your use case is intentional and legitimate, you can safely ignore this warning. Use the Escape button to highlight these characters.
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<!-- 模拟键盘按钮，当然你可以用Button，但要注意Button和GridView的点击响应问题 -->
<TextView
android:id="@+id/btn_keys"
android:layout_height="match_parent"
android:padding="10dp"
android:gravity="center"
android:textSize="25sp"
android:background="@drawable/selector_grid"/>
</LinearLayout>
