Toolbar can't customize title text color

Question

I want to customize toolbar title text color dynamically. I had tried following methods, but all methods below failed. I had also tried to set color before running setSupportActionBar(toolbar), but still failed. I had also searched and tried methods from Stack Overflow, but all also failed.

How can I do?

textColor = Color.parseColor("#00FF00")
toolbar.setTitleTextColor(textColour)

textColor = Color.parseColor("#00FF00")
(toolbar::class.java.getDeclaredField("mTitleTextView")
   .apply { isAccessible = true }
   .get(toolbar) as TextView)
   .setTextColor(textColour)

<androidx.appcompat.widget.Toolbar
    android:layout_width="match_parent"
    android:layout_height="?attr/actionBarSize"
    android:id="@+id/toolbar"
    app:titleTextColor="#00FF00"
    app:popupTheme="@style/AppTheme.PopupOverlay"
    app:layout_collapseMode="pin" />

Answer 1

The problem was solved that I read through source code of CollapsingToolbarLayout, when there is CollapsingToolbarLayout applied, should not change title text color with Toolbar function setTitleTextColor(), but with methods setCollapsedTitleTextColor() and setExpandedTitleColor() of CollapsingToolbarLayout. Following is my code.

• In activity

val textColor = Color.parseColor("#00FF00")
collapsingToolbarLayout.setExpandedTitleColor(textColor)
collapsingToolbarLayout.setCollapsedTitleTextColor(textColor)

• In xml layout

<com.google.android.material.appbar.CollapsingToolbarLayout
    android:layout_width="match_parent"
    android:layout_height="270dp"
    app:layout_scrollFlags="scroll|exitUntilCollapsed"
    app:toolbarId="@id/toolbar"
    android:id="@+id/collapsingToolbarLayout">
    ...
    <androidx.appcompat.widget.Toolbar
        android:layout_width="match_parent"
        android:layout_height="?attr/actionBarSize"
        android:id="@+id/toolbar"
        app:popupTheme="@style/AppTheme.PopupOverlay"
        app:titleTextColor="@color/black"
        app:layout_collapseMode="pin" />
    ...
</com.google.android.material.appbar.CollapsingToolbarLayout>