cleanMachine_android/app/src/main/res/layout/fragment_debug.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
    xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:padding="@dimen/dp_5"
    android:background="@color/shallowblue">
    <TextView
        android:gravity="center"
        android:text="调试页"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>
</android.support.constraint.ConstraintLayout>