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<? xml version= "1.0" encoding= "utf-8" ?> < android.support.constraint.ConstraintLayout 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 :context= "com.example.android.happybirthday.MainActivity" > < 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.Constra...

Before starting on the next video, we want to bring to your attention a new feature in new Android Studio - Constraint Layout - that may require you to make some code modifications to the steps you see in the following videos. Keeping up with the changes Google is constantly improving the Android platform and adding new features. This is great for you as a developer, but it makes learning harder sometimes. Recently Google released ConstraintLayout ; a tool that makes it super fast to create responsive UIs with many different types of components. ConstraintLayout is a great tool to have on the sleeve, but for this class, we will use RelativeLayout , LinearLayout simpler. All of this matters to you because the new project templates in Android Studio now use ConstraintLayout as default, which makes the code you see on your computer a bit different from what is on the screen. Current Layout File In the new versions of Android Studio, after choosing the Empty Activity ...

<LinearLayout     android:layout_width="match_parent"     android:layout_height="match_parent"     android:orientation="vertical">     <TextView         android:layout_width="match_parent"         android:layout_height="wrap_content"         android:text="To Ben"         android:textSize="24sp"/>     <TextView         android:layout_width="match_parent"         android:layout_height="wrap_content"         android:text="Happy Birthday"         android:textSize="34sp"/>     <ImageView         android:layout_width="match_parent"         android:layout_height="wrap_content"         android:layout_weight= "1"          android:src="@drawable/ocean"/> ...

Installation Guide: Windows ForMac installation instructions, go to the next page. Install Android Studio Navigate here, to the Android developers site to install Android Studio. This page will automatically detect your operating system. Accept the terms and conditions to start the download. Double-click the downloaded file and follow all the prompts. Open the downloaded file, and follow the Android Studio Setup Wizard. Accept the defaults configuration for all steps. When you reach this screen, make sure that all components are selected. Setup Wizard After finishing the install, the Setup Wizard will download and install some additional components. Be patient, this might take some time depending on your internet speed. Install Finished! When you are finished, you will see this window:

<LinearLayout     xmlns:android="http://schemas.android.com/apk/res/android"     android:layout_width="match_parent"     android:layout_height="match_parent"                     android:orientation="vertical">     <ImageView         android:src="@drawable/ocean"         android:layout_width="match_parent"         android:layout_height="0dp"         android:layout_weight="1"         android:scaleType="centerCrop" />     <TextView         android:text="You're invited!"         android:paddingTop="16dp"         android:paddingLeft="16dp"         android:paddingBottom="8dp"         android:layout_width="match_parent"         android:layou...

<RelativeLayout     xmlns:android="http://schemas.android.com/apk/res/android"     android:layout_width="match_parent"     android:layout_height="match_parent">     <ImageView         android:id="@+id/beach_Image_View"         android:layout_width="56dp"         android:layout_height="56dp"         android:scaleType="centerCrop"         android:src="@drawable/ocean" />     <TextView         android:id="@+id/pebble_text_View"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:layout_toRightOf="@id/beach_Image_View"         android:text="Pebble Beach"         android:textAppearance="?android:textAppearanceMedium" />     ...

<RelativeLayout     xmlns:android="http://schemas.android.com/apk/res/android"     android:layout_width="match_parent"     android:layout_height="match_parent">     <TextView         android:id="@+id/lyla_text_view"         android:background="#009688"         android:textColor="@android:color/white"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:layout_alignParentBottom="true"         android:layout_alignParentLeft="true"         android:textSize="24sp"         android:text="Lyla" />     <TextView         android:id="@+id/me_text_view"         android:background="#009688"         android:textColor="@android:co...

<RelativeLayout     xmlns:android="http://schemas.android.com/apk/res/android"     android:layout_width="match_parent"     android:layout_height="match_parent">     <TextView         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:layout_alignParentLeft="true"         android:layout_alignParentTop="true"         android:background="#009688"         android:textSize="34sp"         android:textColor="@android:color/white"         android:textAppearance="?android:textAppearanceLarge"         android:text="Happy" />     <TextView         android:layout_width="wrap_content"         android:layout_height="wrap_content"       ...

<LinearLayout     xmlns:android="http://schemas.android.com/apk/res/android"     android:orientation="vertical"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:background="@android:color/darker_gray">     <ImageView         android:src="@drawable/ocean"         android:layout_width="wrap_content"         android:layout_height="0dp"         android:layout_weight="1"         android:scaleType="centerCrop" />     <TextView         android:text="VIP List"         android:layout_width="match_parent"         android:layout_height="0dp"         android:layout_weight="1"         android:background="#4CAF50"         android:textSize...