Android Collapsing ToolbarLayout Example

 build.gradle

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:appcompat-v7:23.0.1'
    compile 'com.android.support:design:23.0.1'
    compile 'com.android.support:cardview-v7:23.0.1'
    compile 'com.android.support:palette-v7:22.2.0'
}

activity_main.xml


<android.support.design.widget.CoordinatorLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <android.support.design.widget.AppBarLayout
        android:layout_width="match_parent"
        android:layout_height="250dp"
        android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">

        <android.support.design.widget.CollapsingToolbarLayout
            android:id="@+id/collapsing_toolbar"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            app:contentScrim="?attr/colorPrimary"
            app:layout_scrollFlags="scroll|exitUntilCollapsed">

            <ImageView
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:scaleType="centerCrop"
                android:background="@drawable/profile_pic"
                app:layout_collapseMode="parallax" />

            <android.support.v7.widget.Toolbar
                android:id="@+id/toolbar"
                android:layout_width="match_parent"
                android:layout_height="?attr/actionBarSize"
                app:layout_collapseMode="pin" />

        </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:background="#ffe5e5e5"
        app:layout_behavior="@string/appbar_scrolling_view_behavior">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical"
            android:paddingTop="10dp">

            <include layout="@layout/card_layout" />

            <include layout="@layout/card_layout" />

            <include layout="@layout/card_layout" />

        </LinearLayout>

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

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



card_layout.xml


<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView
   xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_margin="10dp">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:padding="12dp">

        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="Lorem ipsum"
            android:textSize="20sp" />

        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="@string/text_content"
            android:textSize="18sp" />

    </LinearLayout>

</android.support.v7.widget.CardView>

 MainActivity.java


package com.tutorialsbuzz.collapsingtoolbardemo;

import android.support.v7.app.ActionBar;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;

public class MainActivity extends AppCompatActivity {

 private CollapsingToolbarLayout collapsingToolbarLayout = null;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);


        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);
        ActionBar actionBar = getSupportActionBar();
        actionBar.setDisplayHomeAsUpEnabled(true);

        collapsingToolbarLayout = (CollapsingToolbarLayout) findViewById(R.id.collapsing_toolbar);
        collapsingToolbarLayout.setTitle(getResources().getString(R.string.user_name));

        dynamicToolbarColor();
        toolbarTextAppernce();
    }

    private void dynamicToolbarColor() {

        Bitmap bitmap = BitmapFactory.decodeResource(getResources(),
                R.drawable.profile_pic);
        Palette.from(bitmap).generate(new Palette.PaletteAsyncListener() {

            @Override
            public void onGenerated(Palette palette) {    
 collapsingToolbarLayout.setContentScrimColor(palette.getMutedColor(R.attr.colorPrimary));        collapsingToolbarLayout.setStatusBarScrimColor(palette.getMutedColor(R.attr.colorPrimaryDark);  
        }
       });
    }

    private void toolbarTextAppernce() {
        collapsingToolbarLayout.setCollapsedTitleTextAppearance(R.style.collapsedappbar);
        collapsingToolbarLayout.setExpandedTitleTextAppearance(R.style.expandedappbar);
    }

}