How I implement new material gmail toolbar without nested scrollview?

Question

I want to implement new gmail like toolbar without nested scroll view, which is scroll able, but when scroll down background should be visible.

It will look like this:

Answer 1

您只需要在 Activity 布局中创建自定义布局，例如

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

    <android.support.design.widget.CoordinatorLayout
            android:id="@+id/main_content"
            android:layout_width="match_parent"
            android:layout_height="match_parent">
        <android.support.v7.widget.CardView
                android:layout_margin="16dp"
                android:layout_width="match_parent"
                android:layout_height="wrap_content">


        <android.support.design.widget.AppBarLayout
                android:id="@+id/appbar"

                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">

            <android.support.v7.widget.Toolbar
                    android:id="@+id/toolbar"
                    android:layout_width="match_parent"
                    android:layout_height="?attr/actionBarSize"
                    app:layout_scrollFlags="scroll|enterAlways"
                    app:popupTheme="@style/ThemeOverlay.AppCompat.Light"/>

        </android.support.design.widget.AppBarLayout>
        </android.support.v7.widget.CardView>
    </android.support.design.widget.CoordinatorLayout>
    <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Hello World!"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintLeft_toLeftOf="parent"
            app:layout_constraintRight_toRightOf="parent"
            app:layout_constraintTop_toTopOf="parent"/>

</android.support.constraint.ConstraintLayout>

并将活动的样式更改为“NoActionBar”。对我来说有帮助。