Android应用中一按钮正常工作另一失效，寻求技术帮助

Hey folks, I’ve done my best to troubleshoot this problem on my own, but I’m stuck and hoping someone can help me figure out a solution. Here’s the partial layout declaration for my Activity:

<?xml version="1.0" encoding="utf-8"?> 
<android.support.constraint.ConstraintLayout 
    xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:app="http://schemas.android.com/apk/res-auto" 
    xmlns:tools="http://schemas.android.com/tools" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:layout_gravity="cent...

内容的提问来源于stack exchange，提问作者Youssef ARRASSEN