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Question

My app contains a collapsing toolbar with a title. The title is centerend when it is expanded and should stay centered when it is collapsing. With my layout which is below, my device doesn't center the title when it is collapsed, but moves it a little to the right. What do I have to change so it keeps being centered? If it's helpful I can add images as well of course.

My layout:

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:ads="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:background="@android:color/white"
    android:layout_height="match_parent">

    <android.support.design.widget.AppBarLayout
        android:id="@+id/appBar"
        android:layout_width="match_parent"
        android:layout_height="200dp"
        android:fitsSystemWindows="true"
        android:theme="@style/AppTheme.AppBarOverlay">

        <android.support.design.widget.CollapsingToolbarLayout
            android:id="@+id/toolbar_layout"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:fitsSystemWindows="true"
            app:expandedTitleGravity="center|bottom"
            app:title="Test"
            app:collapsedTitleGravity="center"
            app:expandedTitleMarginBottom="56dp"
            app:layout_scrollFlags="scroll|exitUntilCollapsed"
            app:toolbarId="@+id/toolbar">

            <android.support.v7.widget.Toolbar
                android:id="@+id/toolbar"
                android:layout_width="match_parent"
                android:layout_height="?attr/actionBarSize"
                android:layout_marginBottom="48dp"
                app:layout_collapseMode="pin"
                app:popupTheme="@style/AppTheme.PopupOverlay" />

        </android.support.design.widget.CollapsingToolbarLayout>
    </android.support.design.widget.AppBarLayout>

    <android.support.v4.widget.NestedScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_marginLeft="10dp"
        android:layout_marginRight="10dp"
        android:layout_marginTop="10dp"
        android:fillViewport="true"
        android:layout_gravity="fill_vertical"
        app:layout_behavior="@string/appbar_scrolling_view_behavior">>

    </android.support.v4.widget.NestedScrollView>
</android.support.design.widget.CoordinatorLayout>

This is what it looks like expanded

As you see on this image, it's not centered, but a little moved to the right side

Answer 1

Setting content related properties to 0dp will help you. Here is my working Toolbar entry.

<androidx.appcompat.widget.Toolbar
                    android:id="@+id/toolbar"
                    android:layout_width="match_parent"
                    app:contentInsetLeft="0dp"
                    android:contentInsetLeft="0dp"
                    app:contentInsetStartWithNavigation="0dp"
                    app:contentInsetStart="0dp"
                    android:contentInsetStart="0dp"
                    app:theme="@style/YourTheme"
                    android:gravity="center_horizontal"
                    android:layout_height="?attr/actionBarSize"
                    app:layout_collapseMode="pin"
                    app:titleMargin="0dp" />

Hope it will help :)

Answer 2

Its because of the the back back button at top right. Solution for this is to add marginEnd in your toolbar.

<com.google.android.material.appbar.CollapsingToolbarLayout
    android:id="@+id/htab_collapse_toolbar"
    android:layout_width="match_parent"
    android:layout_height="110dp"
    app:expandedTitleMargin="@dimen/margin_15"
    app:collapsedTitleTextAppearance="@style/test1"
    app:expandedTitleTextAppearance="@style/test"
    app:collapsedTitleGravity="center_horizontal"
    app:layout_scrollFlags="scroll|exitUntilCollapsed"
    android:fitsSystemWindows="true"
    app:title="Send money">
    <androidx.appcompat.widget.Toolbar
        android:id="@+id/htab_toolbar"
        android:layout_width="match_parent"
        android:layout_height="?attr/actionBarSize"
        android:layout_marginEnd="85dp"
        android:layout_gravity="top"
        app:layout_collapseMode="pin"
        app:popupTheme="@style/ThemeOverlay.AppCompat.Light" />
</com.google.android.material.appbar.CollapsingToolbarLayout>