chore : editor symbolinputview improvements

Author: SyntaxSpin

app/src/main/java/com/sparkleseditor/fragments/MainFragment.java

@@ -1,23 +1,16 @@
 package com.sparkleseditor.fragments;
 
-import static android.R.color.transparent;
-
 import android.annotation.SuppressLint;
 import android.graphics.Color;
 import android.os.Bundle;
-import android.util.TypedValue;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 
 import androidx.annotation.NonNull;
-import androidx.core.graphics.Insets;
 import androidx.core.view.GravityCompat;
-import androidx.core.view.ViewCompat;
-import androidx.core.view.WindowInsetsCompat;
 import androidx.fragment.app.Fragment;
 
-import com.google.android.material.floatingactionbutton.FloatingActionButton;
 import com.sparkleseditor.R;
 import com.sparkleseditor.components.ExpandableLayout;
 import com.sparkleseditor.databinding.FragmentMainBinding;

app/src/main/res/layout/fragment_main.xml

@@ -100,12 +100,12 @@
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
                 android:id="@+id/scroll"
-                android:scrollbars="none">
+                android:scrollbars="none"
+                android:background="?colorSurface">
             <io.github.rosemoe.sora.widget.SymbolInputView
                 android:id="@+id/inputer"
                 android:layout_width="match_parent"
-                android:layout_height="wrap_content"
-                android:background="@android:color/transparent"/>
+                android:layout_height="wrap_content" />
              </HorizontalScrollView>