Dr.Android Dr.Android - 1 month ago 9
Android Question

How to make a collapsing toolbar in android?

so im trying to implement a simple collapsing toolbar, but I don't think my xml layout is correct. The text is appearing the image and when I scroll down, I can't scroll back up to see the image. Hope you guys can help!

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:ignore="RtlHardcoded">
<android.support.design.widget.AppBarLayout
android:id="@+id/cardInfo_appbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">
<android.support.design.widget.CollapsingToolbarLayout
android:id="@+id/cardInfo_collapsing"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_scrollFlags="scroll|exitUntilCollapsed|snap">
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:src="@drawable/image_kyoto"/>
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v4.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Hello there"
android:textSize="30dp"/>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Hello there"
android:textSize="30dp"/>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Hello there"
android:textSize="30dp"/> <TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Hello there"
android:textSize="30dp"/>
</LinearLayout>
</android.support.v4.widget.NestedScrollView>
</android.support.design.widget.CoordinatorLayout>


Here's the image
enter image description here

Answer

in your ImageView, add the following attribute:

app:layout_collapseMode="parallax"

Also, in your NextedScrollView tag, add the following:

app:layout_behavior="@string/appbar_scrolling_view_behavior"
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