Develop Mobile App Using Android Lollipop

www.edureka.co/android-development-certification-course
View Android Development course details at www.edureka.co/android-development-certification-course
Develop mobile apps using ANDROID lollipop
For Queries:
Post on Twitter @edurekaIN: #askEdureka
Post on Facebook /edurekaIN
For more details please contact us:
US : 1800 275 9730 (toll free)
INDIA : +91 88808 62004
Email Us : sales@edureka.co

In this webinar, we will discuss:
 Android 5.0 History
 Material Design And UI Components
 Android Runtime (ART)
 Compatibility and Support Libraries
Objectives

Android History

 Preview “L” revealed during I/O 2014
» API Level 20
» Preview images
 November 2014
» Final API Level 21
» Firmware Downloads for Nexus devices Nexus 6/9 “available”
Android 5.0 History

Material Design and
Components

 There is more http :/ / www.g o o gle .c o m / d e sign/ s p e c / m a te rial-d e s ig n/ introduc tion.ht m l
 Design Guidelines

guid e line s
Material Design Principles

 Colors
» Large areas, suggested color palette
 3D
» Mostly 2D & 2.5D to give structure
 Images
» More personal & emotional content
 Light and Shadow
» Cards and Overlays

guid e line s
Material Design Principles 1/2

 Flat
» No bevels, gradients, effects
 Typography
» Roboto and font style definitions
 Animations
» Explains interaction
 Layout templates
» Margins, key lines, etc.

guid e line s
Material Design Principles 2/2

Set in AndroidManifest.xml
@android:style/Theme.Material
@android:style/Theme.Material.Light
@android:style/ Theme.Material.Light.DarkActionBar

guid e line s
Material Design Theme

 ToolBar is a generalized ActionBar
» More flexible
 setActionBar(toolBar)
» Option menu actions
 Can be placed anywhere in the layout
» For example, in a pop up Fragment
 Toolbar is just another View
guid e line s
Toolbar

<!–- For example inside some RelativeLayout -->
<android.widget.Toolbar android:id=”@+id/mytoolbar”
android:layout_height=”wrap_content”
android:layout_width=”match_parent”
android:minHeight=”?attr/actionBarSize”
android:background=”?attr/colorPrimary” />
// Inside Activity, after inflating the layout Toolbar toolbar =
(Toolbar) findViewById(R.id.mytoolbar);
Toolbar Example

toolbar.inflateMenu(R.menu.mytoolbar_menu);
toolbar.setOnMenuItemClickListener(
new Toolbar.OnMenuItemClickListener() {
@Override
public boolean onMenuItemClick(MenuItem item) {
// Do something
}
});
Toolbar – Standalone with Option Menu

 Say good bye to shadow.png
<View … android:elevation="8dp" />
 Change the color of drawables
drawable.setTint(color);
//XML: android:tint="#ff00ff"
Shadows and Tints – Less Drawables!

 Where does its name come from?
Recycled views (aka convert views)
 Powerful adapter-backed view
More flexible than ListView and GridView
 NOT a framework class (!)
Support library on its own
 Gradle dependency
com.android.support:recyclerview-v7:21.0.+
Recycler View

 LayoutManager places child views
 Must be set in RecyclerView
» recyclerView.setLayoutManager(lm);
 Default LayoutManagers
» LinearLayoutManager (vertical & horizontal)
» StaggeredGridLayoutManager
» GridLayoutManager
Recycler View – LayoutManager

 RecyclerView.ViewHolder contains View
Must be sub-classed, avoids findByView(…)
 Implement abstract RecyclerView.Adapter
// create new view and its holder (no binding) ViewHolder onCreateViewHolder(ViewGroup g, int pos)
// bind data values to View
void onBindViewHolder(ViewHolder h, int pos)
int getItemCount()
RecyclerView.Adapter<ViewHolder>

 Problem with notifyDataSetChanged (ListV.)
» Which elements have changed?
» Individual animations are hard to implement
 Fine grained notifications
» notifyItemChanged(int)
» notifyItemInserted(int)
» notifyItemRemoved(int)
» notifyItemRangeChanged(int, int)
» notifyItemRangeInserted(int, int)
» notifyItemRangeRemoved(int, int)
RecyclerView.Adapter – Data Notifications

 ViewHolders might use expensive resources like Bitmaps
 Callbacks useful to release resources
» onViewAttachedToWindow(VH holder)
» onViewDetachedFromWindow(VH holder)
» onViewRecycled(VH holder)
RecyclerView.Adapter Callbacks

 Item modifications are animated by default
 Customize with RecyclerView.ItemAnimator
// Parameters: ViewHolder + change info animateAdd(…)
animateChange(…)
animateMove(…)
animateRemove(…)
// Plus some house keeping methods
RecyclerView Animations

Android Runtime(ART)

 No Java VM
 Dalvik VM
 Java source –> class -> DEX
 DEX: Dalvik executable, register-based
 JIT compiler since Android 2.2
 Several optimizations, but Unlike Java, Dalvik never challenged native
Android VM Basics : Dalvik

 First appearance in Android 4.4, Dalvik is still default, ART is somewhat hidden
 Replaced Dalvik in Android 5.0
 Ahead of time compilation (AOT)
 Better Garbage Collection (GC)
 64 bit support
 Better Profiling and Debugging
 Under documented
ART – The New Android Runtime

 Compilation during installation
» Installation takes longer
» More storage required (DEX + Compiled)
 Better startup time
 No compilation lags during execution
 Compiled ART code is faster than compiled Dalvik code
 Better battery life, less memory consumption
ART – Ahead of Time Compilation

 Reference : ~80,000 Events Dalvik 4.4
ART – Android 4.4 vs. 5.0 Performance

 Chromium 37
 WebGL
 WebAudio
 Updateable from Google Play (!)
 Target SDK 21 has different defaults
» Blocks mixed content (HTTPS & HTTP)
» Blocks 3rd party cookies
 Permissions for camera, microphone, etc.
WebView

 Even more powerful Notifications
» Privacy setting for lock screen
» Heads up notifications (floating)
 Camera2 API, deprecates Camera
» More control, burst mode, etc.
 Job scheduling to save battery
» Enqueue jobs and let the system decide when to run
We could go on and on and on..

Compatibility and Support
Libraries

 Set target level in Manifest
» android:targetSdkVersion="21“
 Check version in code
» if (Build.VERSION.SDK_INT >= 21) {…}
 Use version qualifiers for resource folders
» values-v21/
Support Android 5.0 Optionally

 History: Started with ActionBar, etc.
 ToolBar
 Material Theme with customizable colors
 Tinting for some Views (Toolbar, Checkbox, …)
 Android 5.0 SearchView Widget
App Compact Library V2 1

 For Android 2.1+ (API level 7)
 Depends on the v4 Support Library Fragments, etc.
 Gradle dependency
compile "com.android.support:appcompat-v7:21.0.+"
App Compact Library V2 1 - Integration

 Palette
» Extract primary colors from Bitmap
» com.android.support:palette-v7:21.0.+
 Card Views
» Uses elevation on Android 5.0
» Shadow fallback for Pre-5.0
» com.android.support:cardview-v7:21.0.+
More Support Libraries related to Lollipop

Slide 33Slide 33 www.edureka.co/android-development-certification-course
Course Topics
 Module 1
» Introduction to Android Development
 Module 2
» Android Layouts and Widgets
 Module 3
» Activity and Fragments, Notifications and Media
 Module 4
» Customizing Widgets and Implementing Event
Receivers
 Module 5
» Storage and Animations
 Module 6
» Web Services
 Module 7
» Location and Google Maps
 Module 8
» Database Framework & Third Party Libraries
 Module 9
» Sensors and Social Media Integration
 Module 10
» End-to-End App Development & Publishing

Questions

LIVE Online Class
Class Recording in LMS
24/7 Post Class Support
Module Wise Quiz
Project Work
Verifiable Certificate
How it Works

Develop Mobile App Using Android Lollipop

More Related Content

What's hot (20)

Viewers also liked (15)

Similar to Develop Mobile App Using Android Lollipop (20)

More from Edureka! (20)

Recently uploaded (20)

Develop Mobile App Using Android Lollipop