android/4-3-MultipleViews/SwitchPages/gradle/wrapper/gradle-wrapper.properties

+#Tue Mar 13 18:45:09 EDT 2018
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.1-all.zip

android/4-3-MultipleViews/SwitchPages/gradlew

+#!/usr/bin/env bash
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS=""
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn ( ) {
+    echo "$*"
+}
+
+die ( ) {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+esac
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=$((i+1))
+    done
+    case $i in
+        (0) set -- ;;
+        (1) set -- "$args0" ;;
+        (2) set -- "$args0" "$args1" ;;
+        (3) set -- "$args0" "$args1" "$args2" ;;
+        (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Split up the JVM_OPTS And GRADLE_OPTS values into an array, following the shell quoting and substitution rules
+function splitJvmOpts() {
+    JVM_OPTS=("$@")
+}
+eval splitJvmOpts $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS
+JVM_OPTS[${#JVM_OPTS[*]}]="-Dorg.gradle.appname=$APP_BASE_NAME"
+
+exec "$JAVACMD" "${JVM_OPTS[@]}" -classpath "$CLASSPATH" org.gradle.wrapper.GradleWrapperMain "$@"

android/4-3-MultipleViews/SwitchPages/gradlew.bat

+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS=
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto init
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto init
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:init
+@rem Get command-line arguments, handling Windowz variants
+
+if not "%OS%" == "Windows_NT" goto win9xME_args
+if "%@eval[2+2]" == "4" goto 4NT_args
+
+:win9xME_args
+@rem Slurp the command line arguments.
+set CMD_LINE_ARGS=
+set _SKIP=2
+
+:win9xME_args_slurp
+if "x%~1" == "x" goto execute
+
+set CMD_LINE_ARGS=%*
+goto execute
+
+:4NT_args
+@rem Get arguments from the 4NT Shell from JP Software
+set CMD_LINE_ARGS=%$
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

android/4-3-MultipleViews/SwitchPages/settings.gradle

+include ':app'

android/4-3-MultipleViews/mvc1/.gitignore

+.idea
+.idea/
+
+# Created by https://www.gitignore.io/api/androidstudio
+
+### AndroidStudio ###
+# Covers files to be ignored for android development using Android Studio.
+
+# Built application files
+*.apk
+*.ap_
+
+# Files for the ART/Dalvik VM
+*.dex
+
+# Java class files
+*.class
+
+# Generated files
+bin/
+gen/
+out/
+
+# Gradle files
+.gradle
+.gradle/
+build/
+
+# Signing files
+.signing/
+
+# Local configuration file (sdk path, etc)
+local.properties
+
+# Proguard folder generated by Eclipse
+proguard/
+
+# Log Files
+*.log
+
+# Android Studio
+/*/build/
+/*/local.properties
+/*/out
+/*/*/build
+/*/*/production
+captures/
+.navigation/
+*.ipr
+*~
+*.swp
+
+# Android Patch
+gen-external-apklibs
+
+# External native build folder generated in Android Studio 2.2 and later
+.externalNativeBuild
+
+# NDK
+obj/
+
+# IntelliJ IDEA
+*.iml
+*.iws
+/out/
+
+# User-specific configurations
+.idea/libraries/
+.idea/workspace.xml
+.idea/tasks.xml
+.idea/.name
+.idea/compiler.xml
+.idea/copyright/profiles_settings.xml
+.idea/encodings.xml
+.idea/misc.xml
+.idea/modules.xml
+.idea/scopes/scope_settings.xml
+.idea/dictionaries
+.idea/vcs.xml
+.idea/jsLibraryMappings.xml
+.idea/datasources.xml
+.idea/dataSources.ids
+.idea/sqlDataSources.xml
+.idea/dynamic.xml
+.idea/uiDesigner.xml
+
+# OS-specific files
+.DS_Store
+.DS_Store?
+._*
+.Spotlight-V100
+.Trashes
+ehthumbs.db
+Thumbs.db
+
+# Legacy Eclipse project files
+.classpath
+.project
+
+# Mobile Tools for Java (J2ME)
+.mtj.tmp/
+
+# Package Files #
+*.war
+*.ear
+
+# virtual machine crash logs (Reference: http://www.java.com/en/download/help/error_hotspot.xml)
+hs_err_pid*
+
+## Plugin-specific files:
+
+# mpeltonen/sbt-idea plugin
+.idea_modules/
+
+# JIRA plugin
+atlassian-ide-plugin.xml
+
+# Mongo Explorer plugin
+.idea/mongoSettings.xml
+
+# Crashlytics plugin (for Android Studio and IntelliJ)
+com_crashlytics_export_strings.xml
+crashlytics.properties
+crashlytics-build.properties
+fabric.properties
+
+### AndroidStudio Patch ###
+
+!/gradle/wrapper/gradle-wrapper.jar
+
+# End of https://www.gitignore.io/api/androidstudio
\ No newline at end of file

android/4-3-MultipleViews/mvc1/app/.gitignore

+/build

android/4-3-MultipleViews/mvc1/app/build.gradle

+apply plugin: 'com.android.application'
+
+android {
+    compileSdkVersion 26
+    defaultConfig {
+        applicationId "cs349.uwaterloo.ca.mvc1"
+        minSdkVersion 23
+        targetSdkVersion 26
+        versionCode 1
+        versionName "1.0"
+        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
+    }
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+        }
+    }
+}
+
+dependencies {
+    implementation fileTree(dir: 'libs', include: ['*.jar'])
+    implementation 'com.android.support:appcompat-v7:26.1.0'
+    implementation 'com.android.support.constraint:constraint-layout:1.0.2'
+    testImplementation 'junit:junit:4.12'
+    androidTestImplementation 'com.android.support.test:runner:1.0.1'
+    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
+}

android/4-3-MultipleViews/mvc1/app/proguard-rules.pro

+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

android/4-3-MultipleViews/mvc1/app/src/androidtest/java/cs349/uwaterloo/ca/mvc1/ExampleInstrumentedTest.java

+package cs349.uwaterloo.ca.mvc1;
+
+import android.content.Context;
+import android.support.test.InstrumentationRegistry;
+import android.support.test.runner.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import static org.junit.Assert.*;
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
+ */
+@RunWith(AndroidJUnit4.class)
+public class ExampleInstrumentedTest
+{
+    @Test
+    public void useAppContext() throws Exception
+    {
+        // Context of the app under test.
+        Context appContext = InstrumentationRegistry.getTargetContext();
+
+        assertEquals("cs349.uwaterloo.ca.mvc1", appContext.getPackageName());
+    }
+}

android/4-3-MultipleViews/mvc1/app/src/main/AndroidManifest.xml

+<?xml version="1.0" encoding="utf-8"?>
+<manifest package="cs349.uwaterloo.ca.mvc1"
+          xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <application
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/AppTheme">
+        <activity android:name=".MainActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN"/>
+
+                <category android:name="android.intent.category.LAUNCHER"/>
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>
\ No newline at end of file

android/4-3-MultipleViews/mvc1/app/src/main/java/cs349/uwaterloo/ca/mvc1/MainActivity.java

+package cs349.uwaterloo.ca.mvc1;
+
+import android.support.annotation.Nullable;
+import android.support.v7.app.AppCompatActivity;
+import android.os.Bundle;
+import android.util.Log;
+import android.view.ViewGroup;
+
+public class MainActivity extends AppCompatActivity
+{
+    // Private Vars
+    Model model;
+
+    /**
+     * OnCreate
+     * -- Called when application is initially launched.
+     *    @see <a href="https://developer.android.com/guide/components/activities/activity-lifecycle.html">Android LifeCycle</a>
+     * @param savedInstanceState
+     */
+    @Override
+    protected void onCreate(@Nullable Bundle savedInstanceState)
+    {
+        super.onCreate(savedInstanceState);
+        Log.d(String.valueOf(R.string.DEBUG_MVC_ID), "onCreate called");
+
+        // Load base UI layout from resources.
+        setContentView(R.layout.activity_main);
+
+        // Init Model
+        model = new Model();
+
+        ////////////////////////////////////////
+        // Setup Views
+        ////////////////////////////////////////
+        View1 view1 = new View1(this, model);
+        ViewGroup v1 = (ViewGroup) findViewById(R.id.mainactivity_1);
+        v1.addView(view1);
+
+        View2 view2 = new View2(this, model);
+        ViewGroup v2 = (ViewGroup) findViewById(R.id.mainactivity_2);
+        v2.addView(view2);
+
+        // Init Views
+        model.initObservers();
+    }
+
+
+    ////////////////////////////////////////////////////////////////////////////////////////////////
+    //
+    // Save and Restore State
+    //
+    ////////////////////////////////////////////////////////////////////////////////////////////////
+
+    /**
+     * Save the state of the application
+     * @param outState
+     */
+    @Override
+    protected void onSaveInstanceState(Bundle outState)
+    {
+        super.onSaveInstanceState(outState);
+        Log.d(String.valueOf(R.string.DEBUG_MVC_ID), "MainActivity: Save model state.");
+
+        // Serialize all sateful values form model
+        outState.putInt("Counter", model.getCounter());
+    }
+
+    /**
+     * This method is called after {@link #onStart} when the activity is
+     * being re-initialized from a previously saved state, given here in
+     * <var>savedInstanceState</var>.  Most implementations will simply use {@link #onCreate}
+     * to restore their state, but it is sometimes convenient to do it here
+     * after all of the initialization has been done or to allow subclasses to
+     * decide whether to use your default implementation.  The default
+     * implementation of this method performs a restore of any view state that
+     * had previously been frozen by {@link #onSaveInstanceState}.
+     * <p>
+     * <p>This method is called between {@link #onStart} and
+     * {@link #onPostCreate}.
+     *
+     * @param savedInstanceState the data most recently supplied in {@link #onSaveInstanceState}.
+     * @see #onCreate
+     * @see #onPostCreate
+     * @see #onResume
+     * @see #onSaveInstanceState
+     */
+    @Override
+    protected void onRestoreInstanceState(Bundle savedInstanceState)
+    {
+        super.onRestoreInstanceState(savedInstanceState);
+        Log.d(String.valueOf(R.string.DEBUG_MVC_ID), "MainActivity: Restore model");
+
+        // Get all values and restore them to model
+        model.setCounter(savedInstanceState.getInt("Counter"));
+    }
+}

android/4-3-MultipleViews/mvc1/app/src/main/java/cs349/uwaterloo/ca/mvc1/Model.java

+package cs349.uwaterloo.ca.mvc1;
+
+import android.util.Log;
+import java.util.Observable;
+import java.util.Observer;
+
+/**
+ * CS349_AndroidSamples
+ * <p>
+ * Created by J. J. Hartmann on 11/19/2017.
+ * Email: j3hartma@uwaterloo.ca
+ * Copyright 2017
+ */
+
+
+/**
+ * Class Model
+ * - Stores a persistent state for the application.
+ */
+public class Model extends Observable
+{
+    // Private Variables
+    private int mCounter;
+
+    /**
+     * Model Constructor:
+     * - Init member variables
+     */
+    Model() {
+        mCounter = 0;
+    }
+
+    /**
+     * Get mCounter Values
+     * @return Current value mCounter
+     */
+    public int getCounter()
+    {
+        return mCounter;
+    }
+
+    /**
+     * Set mCounter Value
+     * @param i
+     * -- Value to set Counter
+     */
+    public void setCounter(int i)
+    {
+        Log.d("DEMO", "Model: set counter to " + mCounter);
+        this.mCounter = i;
+    }
+
+    /**
+     * Increment mCounter by 1
+     */
+    public void incrementCounter()
+    {
+        mCounter++;
+        Log.d("DEMO", "Model: increment counter to " + mCounter);
+
+        // Observable API
+        setChanged();
+        notifyObservers();
+    }
+
+
+    ////////////////////////////////////////////////////////////////////////////////////////////////
+    //
+    // Observable Methods
+    //
+    ////////////////////////////////////////////////////////////////////////////////////////////////
+
+    /**
+     * Helper method to make it easier to initialize all observers
+     */
+    public void initObservers()
+    {
+        setChanged();
+        notifyObservers();
+    }
+
+    /**
+     * Deletes an observer from the set of observers of this object.
+     * Passing <CODE>null</CODE> to this method will have no effect.
+     *
+     * @param o the observer to be deleted.
+     */
+    @Override
+    public synchronized void deleteObserver(Observer o)
+    {
+        super.deleteObserver(o);
+    }
+
+    /**
+     * Adds an observer to the set of observers for this object, provided
+     * that it is not the same as some observer already in the set.
+     * The order in which notifications will be delivered to multiple
+     * observers is not specified. See the class comment.
+     *
+     * @param o an observer to be added.
+     * @throws NullPointerException if the parameter o is null.
+     */
+    @Override
+    public synchronized void addObserver(Observer o)
+    {
+        super.addObserver(o);
+    }
+
+    /**
+     * Clears the observer list so that this object no longer has any observers.
+     */
+    @Override
+    public synchronized void deleteObservers()
+    {
+        super.deleteObservers();
+    }
+
+    /**
+     * If this object has changed, as indicated by the
+     * <code>hasChanged</code> method, then notify all of its observers
+     * and then call the <code>clearChanged</code> method to
+     * indicate that this object has no longer changed.
+     * <p>
+     * Each observer has its <code>update</code> method called with two
+     * arguments: this observable object and <code>null</code>. In other
+     * words, this method is equivalent to:
+     * <blockquote><tt>
+     * notifyObservers(null)</tt></blockquote>
+     *
+     * @see Observable#clearChanged()
+     * @see Observable#hasChanged()
+     * @see Observer#update(Observable, Object)
+     */
+    @Override
+    public void notifyObservers()
+    {
+        super.notifyObservers();
+    }
+}

android/4-3-MultipleViews/mvc1/app/src/main/java/cs349/uwaterloo/ca/mvc1/View1.java

+package cs349.uwaterloo.ca.mvc1;
+
+import android.content.Context;
+import android.util.Log;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.Button;
+import android.widget.LinearLayout;
+
+import java.util.Observable;
+import java.util.Observer;
+
+/**
+ * CS349_AndroidSamples
+ * <p>
+ * Created by J. J. Hartmann on 11/19/2017.
+ * Email: j3hartma@uwaterloo.ca
+ * Copyright 2017
+ */
+
+public class View1 extends LinearLayout implements Observer
+{
+    // Private Vars
+    private Model model;
+    private Button button;
+
+    public View1(Context context, Model m)
+    {
+        super(context);
+        Log.d(String.valueOf(R.string.DEBUG_MVC_ID), "View1: Constructor");
+
+        // Get the XML view description and "inflate" it into the display (like rendering)
+        View.inflate(context, R.layout.view1_layout, this);
+
+        // Save model
+        model = m;
+
+        // Add view to observer
+        model.addObserver(this);
+
+        // Get reference for button
+        button = (Button) findViewById(R.id.view1_button);
+
+        // Create controller for button
+        button.setOnClickListener(new OnClickListener()
+        {
+            @Override
+            public void onClick(View v)
+            {
+                // Increment model when button is clicked
+                model.incrementCounter();
+            }
+        });
+    }
+
+    /**
+     * This method is called whenever the observed object is changed. An
+     * application calls an <tt>Observable</tt> object's
+     * <code>notifyObservers</code> method to have all the object's
+     * observers notified of the change.
+     *
+     * @param o   the observable object.
+     * @param arg an argument passed to the <code>notifyObservers</code>
+     */
+    @Override
+    public void update(Observable o, Object arg)
+    {
+        Log.d(String.valueOf(R.string.DEBUG_MVC_ID), "View1: Update Called");
+
+        // Update button text the click count from model
+        button.setText(String.valueOf(model.getCounter()));
+    }
+}

android/4-3-MultipleViews/mvc1/app/src/main/java/cs349/uwaterloo/ca/mvc1/View2.java

+package cs349.uwaterloo.ca.mvc1;
+
+import android.content.Context;
+import android.util.Log;
+import android.view.View;
+import android.widget.LinearLayout;
+import android.widget.TextView;
+
+import java.util.Observable;
+import java.util.Observer;
+
+/**
+ * CS349_AndroidSamples
+ * <p>
+ * Created by J. J. Hartmann on 11/19/2017.
+ * Email: j3hartma@uwaterloo.ca
+ * Copyright 2017
+ */
+
+public class View2 extends LinearLayout implements Observer
+{
+    // Private Vars
+    private Model model;
+    private TextView textView;
+
+    public View2(Context context, Model m)
+    {
+        super(context);
+        Log.d(String.valueOf(R.string.DEBUG_MVC_ID), "View2: Constructor Called");
+
+        // Get the XML view description and "inflate" it into the display (like rendering)
+        View.inflate(context, R.layout.view2_layout, this);
+
+        // Save model ref
+        this.model = m;
+
+        // Add view to model list of observers
+        model.addObserver(this);
+
+        // get reference to widgets and manipulate updates
+        textView = (TextView) findViewById(R.id.view2_textView);
+
+        // Create a controller to increment counter when clicked
+        textView.setOnClickListener(new OnClickListener()
+        {
+            @Override
+            public void onClick(View v)
+            {
+                // Increment counter everytime view text view is clicked.
+                model.incrementCounter();
+            }
+        });
+
+    }
+
+
+    /**
+     * This method is called whenever the observed object is changed. An
+     * application calls an <tt>Observable</tt> object's
+     * <code>notifyObservers</code> method to have all the object's
+     * observers notified of the change.
+     *
+     * @param o   the observable object.
+     * @param arg an argument passed to the <code>notifyObservers</code>
+     */
+    @Override
+    public void update(Observable o, Object arg)
+    {
+        Log.d(String.valueOf(R.string.DEBUG_MVC_ID), "View2: Update TextView");
+
+        // Build String based on model state
+        StringBuilder s = new StringBuilder();
+        for(int i = 0; i < model.getCounter(); ++i){
+            s.append("x");
+        }
+
+        // Update textView
+        textView.setText(s);
+    }
+}

android/4-3-MultipleViews/mvc1/app/src/main/res/drawable-v24/ic_launcher_foreground.xml

+<vector xmlns:aapt="http://schemas.android.com/aapt"
+        xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="108dp"
+        android:height="108dp"
+        android:viewportHeight="108"
+        android:viewportWidth="108">
+    <path
+        android:fillType="evenOdd"
+        android:pathData="M32,64C32,64 38.39,52.99 44.13,50.95C51.37,48.37 70.14,49.57 70.14,49.57L108.26,87.69L108,109.01L75.97,107.97L32,64Z"
+        android:strokeColor="#00000000"
+        android:strokeWidth="1">
+        <aapt:attr name="android:fillColor">
+            <gradient
+                android:endX="78.5885"
+                android:endY="90.9159"
+                android:startX="48.7653"
+                android:startY="61.0927"
+                android:type="linear">
+                <item
+                    android:color="#44000000"
+                    android:offset="0.0"/>
+                <item
+                    android:color="#00000000"
+                    android:offset="1.0"/>
+            </gradient>
+        </aapt:attr>
+    </path>
+    <path
+        android:fillColor="#FFFFFF"
+        android:fillType="nonZero"
+        android:pathData="M66.94,46.02L66.94,46.02C72.44,50.07 76,56.61 76,64L32,64C32,56.61 35.56,50.11 40.98,46.06L36.18,41.19C35.45,40.45 35.45,39.3 36.18,38.56C36.91,37.81 38.05,37.81 38.78,38.56L44.25,44.05C47.18,42.57 50.48,41.71 54,41.71C57.48,41.71 60.78,42.57 63.68,44.05L69.11,38.56C69.84,37.81 70.98,37.81 71.71,38.56C72.44,39.3 72.44,40.45 71.71,41.19L66.94,46.02ZM62.94,56.92C64.08,56.92 65,56.01 65,54.88C65,53.76 64.08,52.85 62.94,52.85C61.8,52.85 60.88,53.76 60.88,54.88C60.88,56.01 61.8,56.92 62.94,56.92ZM45.06,56.92C46.2,56.92 47.13,56.01 47.13,54.88C47.13,53.76 46.2,52.85 45.06,52.85C43.92,52.85 43,53.76 43,54.88C43,56.01 43.92,56.92 45.06,56.92Z"
+        android:strokeColor="#00000000"
+        android:strokeWidth="1"/>
+</vector>

android/4-3-MultipleViews/mvc1/app/src/main/res/drawable/ic_launcher_background.xml

+<?xml version="1.0" encoding="utf-8"?>
+<vector
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportHeight="108"
+    android:viewportWidth="108">
+    <path
+        android:fillColor="#26A69A"
+        android:pathData="M0,0h108v108h-108z"/>
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M9,0L9,108"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8"/>
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,0L19,108"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8"/>
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M29,0L29,108"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8"/>
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M39,0L39,108"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8"/>
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M49,0L49,108"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8"/>
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M59,0L59,108"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8"/>
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M69,0L69,108"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8"/>
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M79,0L79,108"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8"/>
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M89,0L89,108"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8"/>
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M99,0L99,108"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8"/>
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,9L108,9"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8"/>
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,19L108,19"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8"/>
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,29L108,29"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8"/>
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,39L108,39"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8"/>
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,49L108,49"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8"/>
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,59L108,59"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8"/>
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,69L108,69"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8"/>
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,79L108,79"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8"/>
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,89L108,89"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8"/>
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,99L108,99"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8"/>
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,29L89,29"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8"/>
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,39L89,39"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8"/>
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,49L89,49"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8"/>
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,59L89,59"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8"/>
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,69L89,69"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8"/>
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,79L89,79"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8"/>
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M29,19L29,89"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8"/>
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M39,19L39,89"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8"/>
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M49,19L49,89"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8"/>
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M59,19L59,89"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8"/>
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M69,19L69,89"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8"/>
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M79,19L79,89"
+        android:strokeColor="#33FFFFFF"
+        android:strokeWidth="0.8"/>
+</vector>

android/4-3-MultipleViews/mvc1/app/src/main/res/layout/activity_main.xml

+<?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="cs349.uwaterloo.ca.mvc1.MainActivity">
+
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:layout_marginBottom="8dp"
+        android:layout_marginEnd="8dp"
+        android:layout_marginStart="8dp"
+        android:layout_marginTop="8dp"
+        android:orientation="vertical"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent">
+
+        <LinearLayout
+            android:id="@+id/mainactivity_1"
+            android:layout_width="match_parent"
+            android:layout_height="236dp"
+            android:orientation="horizontal">
+
+        </LinearLayout>
+
+        <LinearLayout
+            android:id="@+id/mainactivity_2"
+            android:layout_width="match_parent"
+            android:layout_height="261dp"
+            android:orientation="horizontal">
+
+        </LinearLayout>
+    </LinearLayout>
+</android.support.constraint.ConstraintLayout>

android/4-3-MultipleViews/mvc1/app/src/main/res/layout/view1_layout.xml

+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+              android:layout_width="match_parent"
+              android:layout_height="match_parent">
+
+    <Button
+        android:id="@+id/view1_button"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_weight="1"
+        android:text="Button"
+        android:textSize="18sp"/>
+</LinearLayout>

android/4-3-MultipleViews/mvc1/app/src/main/res/layout/view2_layout.xml

+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+              android:layout_width="match_parent"
+              android:layout_height="match_parent">
+
+    <TextView
+        android:id="@+id/view2_textView"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_weight="1"
+        android:text="TextView"
+        android:textSize="24sp"/>
+</LinearLayout>