updating for fall 2018 semester

.gitignore

+# built application files
+*.apk
+*.ap_
+
+# files for the dex VM
+*.dex
+
+# Java class files
+*.class
+
+# Mac files
+.DS_Store
+
+# generated files
+bin/
+gen/
+
+# Ignore gradle files
+.gradle/
+build/
+
+# Local configuration file (sdk path, etc)
+local.properties
+
+# Proguard folder generated by Eclipse
+proguard/
+
+# Eclipse prefs files
+.prefs
+
+# Android Studio
+*.iml
+.idea
+.gradle
+build/
+
+#NDK
+obj/

app/build.gradle

+apply plugin: 'com.android.application'
+
+android {
+    compileSdkVersion 26
+    buildToolsVersion '27.0.3'
+
+    defaultConfig {
+        applicationId "course.labs.gestureslab"
+        minSdkVersion 21
+        targetSdkVersion 26
+
+        testApplicationId "course.labs.gestureslab.test"
+        testInstrumentationRunner "android.test.InstrumentationTestRunner"
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
+        }
+    }
+}
+
+dependencies {
+    androidTestImplementation 'com.jayway.android.robotium:robotium-solo:5.2.1'
+}

app/src/androidTest/java/course/labs/gestureslab/test/BubbleActivityFling.java

+package course.labs.gestureslab.test;
+
+import course.labs.gestureslab.BubbleActivity;
+
+import com.robotium.solo.*;
+import android.test.ActivityInstrumentationTestCase2;
+import android.view.WindowManager;
+
+public class BubbleActivityFling extends
+		ActivityInstrumentationTestCase2<BubbleActivity> {
+	private Solo solo;
+
+	public BubbleActivityFling() {
+		super(BubbleActivity.class);
+	}
+
+	public void setUp() throws Exception {
+		solo = new Solo(getInstrumentation(), getActivity());
+		getInstrumentation().runOnMainSync(new Runnable() {
+			@Override
+			public void run() {
+				getActivity().getWindow().addFlags(
+						WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD);
+			}
+		});
+	}
+
+	@Override
+	public void tearDown() throws Exception {
+		solo.finishOpenedActivities();
+	}
+
+	public void testRun() {
+
+		int delay = 2000;
+
+		// Wait for activity: 'course.labs.TouchLab.BubbleActivity'
+		solo.waitForActivity(course.labs.gestureslab.BubbleActivity.class,
+				delay);
+
+		solo.clickOnActionBarItem(course.labs.gestureslab.R.id.menu_still_mode);
+
+		solo.sleep(delay);
+
+		// Click to create a bubble
+		solo.clickOnScreen(100, 100);
+
+		solo.sleep(delay);
+		
+		// Assert that a bubble was displayed
+		assertEquals(
+				"Bubble hasn't appeared",
+				1,
+				solo.getCurrentViews(
+						course.labs.gestureslab.BubbleActivity.BubbleView.class)
+						.size());
+
+		// Fling the bubble
+		solo.drag(100, 500, 100, 500, 3);
+
+		// Give bubble time to leave screen
+		solo.sleep(delay);
+
+		// Assert that the bubble has left the screen
+		assertEquals(
+				"Bubble hasn't left the screen",
+				0,
+				solo.getCurrentViews(
+						course.labs.gestureslab.BubbleActivity.BubbleView.class)
+						.size());
+	}
+}

app/src/androidTest/java/course/labs/gestureslab/test/BubbleActivityFloatOffScreen.java

+package course.labs.gestureslab.test;
+
+import course.labs.gestureslab.BubbleActivity;
+
+import com.robotium.solo.*;
+import android.test.ActivityInstrumentationTestCase2;
+import android.view.WindowManager;
+
+public class BubbleActivityFloatOffScreen extends
+		ActivityInstrumentationTestCase2<BubbleActivity> {
+	private Solo solo;
+
+	public BubbleActivityFloatOffScreen() {
+		super(BubbleActivity.class);
+	}
+
+	public void setUp() throws Exception {
+		solo = new Solo(getInstrumentation(), getActivity());
+		getInstrumentation().runOnMainSync(new Runnable() {
+			@Override
+			public void run() {
+				getActivity().getWindow().addFlags(
+						WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD);
+			}
+		});
+	}
+
+	@Override
+	public void tearDown() throws Exception {
+		solo.finishOpenedActivities();
+	}
+
+	public void testRun() {
+
+		int shortDelay = 300, delay = 2000, delay2 = 3000;
+
+		// Wait for activity: 'course.labs.TouchLab.BubbleActivity'
+		solo.waitForActivity(course.labs.gestureslab.BubbleActivity.class,
+				delay);
+
+		// Click on action bar item
+		solo.clickOnActionBarItem(course.labs.gestureslab.R.id.menu_single_speed);
+
+		solo.sleep(delay);
+
+		// Click to create a bubble
+		solo.clickOnScreen(350.0f, 350.0f);
+
+		// Check whether bubble appears
+		boolean bubbleAppeared = solo.getCurrentViews(
+				course.labs.gestureslab.BubbleActivity.BubbleView.class).size() > 0;
+		for (int i = 0; i < 10 && !bubbleAppeared; i++) {
+			solo.sleep(shortDelay);
+			bubbleAppeared = solo.getCurrentViews(
+					course.labs.gestureslab.BubbleActivity.BubbleView.class)
+					.size() > 0;
+		}
+
+		// Assert that a bubble was displayed
+		assertTrue("Bubble hasn't appeared", bubbleAppeared);
+
+		solo.sleep(delay2);
+
+		// Assert that the bubble has left the screen
+		assertEquals(
+				"Bubble hasn't left the screen",
+				0,
+				solo.getCurrentViews(
+						course.labs.gestureslab.BubbleActivity.BubbleView.class)
+						.size());
+
+	}
+}

app/src/androidTest/java/course/labs/gestureslab/test/BubbleActivityMenu.java

+package course.labs.gestureslab.test;
+
+import android.test.ActivityInstrumentationTestCase2;
+import android.view.WindowManager;
+
+import com.robotium.solo.Solo;
+
+import course.labs.gestureslab.BubbleActivity;
+
+
+public class BubbleActivityMenu extends ActivityInstrumentationTestCase2<BubbleActivity> {
+  	private Solo solo;
+  	
+  	public BubbleActivityMenu() {
+		super(BubbleActivity.class);
+  	}
+
+	public void setUp() throws Exception {
+		solo = new Solo(getInstrumentation(), getActivity());
+		getInstrumentation().runOnMainSync(new Runnable() {
+			@Override
+			public void run() {
+				getActivity().getWindow().addFlags(
+						WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD);
+			}
+		});
+	}
+  
+   	@Override
+   	public void tearDown() throws Exception {
+        solo.finishOpenedActivities();
+  	}
+  
+	public void testRun() {
+
+		int delay = 2000; 
+
+		// Wait for activity: 'course.labs.TouchLab.BubbleActivity'
+		solo.waitForActivity(course.labs.gestureslab.BubbleActivity.class, 2000);
+		
+		solo.clickOnActionBarItem(course.labs.gestureslab.R.id.menu_still_mode);
+
+		solo.sleep(delay);
+		
+		//Gesture starting top left to open menu
+		solo.drag(0,300,300,350, 10);
+		
+		solo.sleep(delay);
+		
+		//checking if menu opened by clicking on a menu item 
+		//without opening the menu.
+		assertTrue("Menu did not appear", solo.waitForText("Random Speed Mode"));
+		
+	}
+}

app/src/androidTest/java/course/labs/gestureslab/test/BubbleActivityMultiple.java

+package course.labs.gestureslab.test;
+
+import course.labs.gestureslab.BubbleActivity;
+
+import com.robotium.solo.*;
+import android.test.ActivityInstrumentationTestCase2;
+import android.view.WindowManager;
+
+public class BubbleActivityMultiple extends
+		ActivityInstrumentationTestCase2<BubbleActivity> {
+	private Solo solo;
+
+	public BubbleActivityMultiple() {
+		super(BubbleActivity.class);
+	}
+
+	public void setUp() throws Exception {
+		solo = new Solo(getInstrumentation(), getActivity());
+		getInstrumentation().runOnMainSync(new Runnable() {
+			@Override
+			public void run() {
+				getActivity().getWindow().addFlags(
+						WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD);
+			}
+		});
+
+	}
+
+	@Override
+	public void tearDown() throws Exception {
+		solo.finishOpenedActivities();
+	}
+
+	public void testRun() {
+
+		int delay = 2000;
+
+		// Wait for activity: 'course.labs.TouchLab.BubbleActivity'
+		solo.waitForActivity(course.labs.gestureslab.BubbleActivity.class,
+				delay);
+
+		// Set Still Mode
+		solo.clickOnActionBarItem(course.labs.gestureslab.R.id.menu_still_mode);
+
+		solo.sleep(delay);
+
+		// Click to create a bubble
+		solo.clickOnScreen(100, 100);
+
+		solo.sleep(delay);
+
+		// Assert that a bubble was displayed
+		assertEquals(
+				"Bubble hasn't appeared",
+				1,
+				solo.getCurrentViews(
+						course.labs.gestureslab.BubbleActivity.BubbleView.class)
+						.size());
+
+		// Click to create second bubble
+		solo.clickOnScreen(300, 300);
+
+		solo.sleep(delay);
+
+		// Assert that a bubble was displayed
+		assertEquals(
+				"Second bubble hasn't appeared",
+				2,
+				solo.getCurrentViews(
+						course.labs.gestureslab.BubbleActivity.BubbleView.class)
+						.size());
+
+		solo.sleep(delay);
+
+		// Give misbehaving bubbles a chance to move off screen
+		// Assert that there are two bubbles on the screen
+		assertEquals(
+				"There should be two bubbles on the screen",
+				2,
+				solo.getCurrentViews(
+						course.labs.gestureslab.BubbleActivity.BubbleView.class)
+						.size());
+	}
+}

app/src/androidTest/java/course/labs/gestureslab/test/BubbleActivityPop.java

+package course.labs.gestureslab.test;
+
+import course.labs.gestureslab.BubbleActivity;
+
+import com.robotium.solo.*;
+import android.test.ActivityInstrumentationTestCase2;
+import android.view.WindowManager;
+
+public class BubbleActivityPop extends
+		ActivityInstrumentationTestCase2<BubbleActivity> {
+	private Solo solo;
+
+	public BubbleActivityPop() {
+		super(BubbleActivity.class);
+	}
+
+	public void setUp() throws Exception {
+		solo = new Solo(getInstrumentation(), getActivity());
+		getInstrumentation().runOnMainSync(new Runnable() {
+			@Override
+			public void run() {
+				getActivity().getWindow().addFlags(
+						WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD);
+			}
+		});
+	}
+
+	@Override
+	public void tearDown() throws Exception {
+		solo.finishOpenedActivities();
+	}
+
+	public void testRun() {
+
+		int delay = 2000;
+
+		// Wait for activity: 'course.labs.TouchLab.BubbleActivity'
+		solo.waitForActivity(course.labs.gestureslab.BubbleActivity.class,
+				delay);
+
+		// Set Still Mode
+		solo.clickOnActionBarItem(course.labs.gestureslab.R.id.menu_still_mode);
+
+		solo.sleep(delay);
+
+		// Click to create a bubble
+		solo.clickOnScreen(250, 250);
+
+		solo.sleep(delay);
+
+		// Assert that a bubble was displayed
+		assertEquals(
+				"Bubble hasn't appeared",
+				1,
+				solo.getCurrentViews(
+						course.labs.gestureslab.BubbleActivity.BubbleView.class)
+						.size());
+
+		// Click to remove the same bubble
+		solo.clickOnScreen(250, 250);
+
+		solo.sleep(delay);
+
+		// Assert that there are no more bubbles
+		assertEquals(
+				"The bubble was not popped",
+				0,
+				solo.getCurrentViews(
+						course.labs.gestureslab.BubbleActivity.BubbleView.class)
+						.size());
+
+	}
+}

app/src/androidTest/java/course/labs/gestureslab/test/BubbleActivityTen.java

+package course.labs.gestureslab.test;
+
+import android.test.ActivityInstrumentationTestCase2;
+import android.view.WindowManager;
+
+import com.robotium.solo.Solo;
+
+import course.labs.gestureslab.BubbleActivity;
+
+public class BubbleActivityTen extends
+		ActivityInstrumentationTestCase2<BubbleActivity> {
+	private Solo solo;
+
+	public BubbleActivityTen() {
+		super(BubbleActivity.class);
+	}
+
+	public void setUp() throws Exception {
+		solo = new Solo(getInstrumentation(), getActivity());
+		getInstrumentation().runOnMainSync(new Runnable() {
+			@Override
+			public void run() {
+				getActivity().getWindow().addFlags(
+						WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD);
+			}
+		});
+	}
+
+	@Override
+	public void tearDown() throws Exception {
+		solo.finishOpenedActivities();
+	}
+
+	public void testRun() {
+		
+		int delay = 2000; 
+		
+		// Wait for activity: 'course.labs.TouchLab.BubbleActivity'
+		solo.waitForActivity(course.labs.gestureslab.BubbleActivity.class, 2000);
+
+		// Set Still Mode
+		solo.clickOnActionBarItem(course.labs.gestureslab.R.id.menu_still_mode);
+		
+		solo.sleep(delay);
+		
+		//Gesture starting in top right to add ten bubbles
+		solo.drag(300,0,200,300,10);
+		
+		solo.sleep(delay);
+	
+		// Give misbehaving bubbles a chance to move off screen
+		// Assert that there are two bubbles on the screen
+		assertEquals(
+				"There should be ten bubbles on the screen",
+				10,
+				solo.getCurrentViews(
+						course.labs.gestureslab.BubbleActivity.BubbleView.class)
+						.size());
+
+	}
+}

app/src/main/AndroidManifest.xml

+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="course.labs.gestureslab"
+    android:versionCode="1"
+    android:versionName="1.0" >
+
+    <uses-sdk
+        android:minSdkVersion="11"
+        android:targetSdkVersion="18" />
+
+    <application
+        android:allowBackup="false"
+        android:icon="@drawable/icon"
+        android:label="@string/app_name" >
+  
+        <activity
+            android:name=".BubbleActivity"
+            android:label="@string/app_name"
+            android:theme="@android:style/Theme.NoTitleBar.Fullscreen" >
+            <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

app/src/main/java/course/labs/gestureslab/BubbleActivity.java

+package course.labs.gestureslab;
+
+import java.util.ArrayList;
+import java.util.Random;
+import java.util.concurrent.Executors;
+import java.util.concurrent.ScheduledExecutorService;
+import java.util.concurrent.ScheduledFuture;
+import java.util.concurrent.TimeUnit;
+
+import android.app.Activity;
+import android.content.Context;
+import android.gesture.Gesture;
+import android.gesture.GestureLibraries;
+import android.gesture.GestureLibrary;
+import android.gesture.GestureOverlayView;
+import android.gesture.GestureOverlayView.OnGesturePerformedListener;
+import android.gesture.Prediction;
+import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
+import android.graphics.Canvas;
+import android.graphics.Paint;
+import android.media.AudioAttributes;
+import android.media.AudioManager;
+import android.media.SoundPool;
+import android.media.SoundPool.OnLoadCompleteListener;
+import android.os.Bundle;
+import android.util.Log;
+import android.view.GestureDetector;
+import android.view.Menu;
+import android.view.MenuItem;
+import android.view.MotionEvent;
+import android.view.View;
+import android.view.View.OnTouchListener;
+import android.widget.FrameLayout;
+import android.widget.Toast;
+
+public class BubbleActivity extends Activity implements
+		OnGesturePerformedListener {
+
+	private static final double MIN_PRED_SCORE = 3.0;
+	// These variables are for testing purposes, do not modify
+	private final static int RANDOM = 0;
+	private final static int SINGLE = 1;
+	private final static int STILL = 2;
+	public static int speedMode = RANDOM;
+
+	private static final String TAG = "Lab-Gestures";
+
+	// The Main view
+	private FrameLayout mFrame;
+
+	// Bubble image's bitmap
+	private Bitmap mBitmap;
+
+	// Display dimensions
+	private int mDisplayWidth, mDisplayHeight;
+
+	// Sound variables
+
+	// AudioManager
+	private AudioManager mAudioManager;
+	// SoundPool
+	private SoundPool mSoundPool;
+	// ID for the bubble popping sound
+	private int mSoundID;
+	// Audio volume
+	private float mStreamVolume;
+
+	// Gesture Detector
+	private GestureDetector mGestureDetector;
+
+	// Gesture Library
+	private GestureLibrary mLibrary;
+
+	@Override
+	public void onCreate(Bundle savedInstanceState) {
+		super.onCreate(savedInstanceState);
+
+		setContentView(R.layout.main);
+
+		// Set up user interface
+		mFrame = (FrameLayout) findViewById(R.id.frame);
+
+		// Load basic bubble Bitmap
+		mBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.b64);
+
+		// TODO - Fetch GestureLibrary from raw
+
+
+		GestureOverlayView gestureOverlay = (GestureOverlayView) findViewById(R.id.gestures_overlay);
+
+		// TODO - Make this the target of gesture detection callbacks
+
+
+		// TODO - implement OnTouchListener to pass all events received by the
+		// gestureOverlay to the basic gesture detector
+
+		gestureOverlay.setOnTouchListener(new OnTouchListener() {
+
+			@Override
+			public boolean onTouch(View v, MotionEvent event) {
+				return true || false;
+			}
+		});
+
+
+
+
+		// Uncomment next line to turn off gesture highlights
+		// gestureOverlay.setUncertainGestureColor(Color.TRANSPARENT);
+
+		// Loads the gesture library
+		if (!mLibrary.load()) {
+			finish();
+		}
+
+	}
+
+	@Override
+	protected void onResume() {
+		super.onResume();
+
+		// Manage bubble popping sound
+		// Use AudioManager.STREAM_MUSIC as stream type
+
+		AudioAttributes musicAttribute = new AudioAttributes.Builder()
+				.setContentType(AudioAttributes.CONTENT_TYPE_MUSIC)
+				.build();
+		mSoundPool = new SoundPool.Builder()
+				.setMaxStreams(10)
+				.setAudioAttributes(musicAttribute)
+				.build();
+
+		// TODO - load the sound from res/raw/bubble_pop.wav
+
+
+		// TODO - Set a SoundPool OnLoadCompletedListener that calls
+		// setupGestureDetector()
+
+
+		// TODO - Load the sound from res/raw/bubble_pop.wav
+
+
+	}
+
+	@Override
+	public void onWindowFocusChanged(boolean hasFocus) {
+		super.onWindowFocusChanged(hasFocus);
+		if (hasFocus) {
+
+			// Get the size of the display so this View knows where borders are
+			mDisplayWidth = mFrame.getWidth();
+			mDisplayHeight = mFrame.getHeight();
+
+		}
+	}
+
+	// Set up GestureDetector
+	private void setupGestureDetector() {
+
+		mGestureDetector = new GestureDetector(this,
+				new GestureDetector.SimpleOnGestureListener() {
+
+					// If a fling gesture starts on a BubbleView then change the
+					// BubbleView's velocity
+
+					@Override
+					public boolean onFling(MotionEvent event1,
+										   MotionEvent event2, float velocityX, float velocityY) {
+
+						// TODO - Implement onFling actions.
+						// You can get all Views in mFrame one at a time
+						// using the ViewGroup.getChildAt() method
+
+
+
+
+
+
+
+						return true || false;
+					}
+
+					// If a single tap intersects a BubbleView, then pop the
+					// BubbleView
+					// Otherwise, create a new BubbleView at the tap's location
+					// and add
+					// it to mFrame. You can get all views from mFrame with
+					// ViewGroup.getChildAt()
+
+					@Override
+					public boolean onSingleTapConfirmed(MotionEvent event) {
+
+						// TODO - Implement onSingleTapConfirmed actions.
+						// You can get all Views in mFrame using the
+						// ViewGroup.getChildCount() method
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+						return true || false;
+					}
+
+					// Good practice to override this method because all
+					// gestures start with a ACTION_DOWN event
+					@Override
+					public boolean onDown(MotionEvent event) {
+						return true;
+					}
+				});
+	}
+
+	@Override
+	protected void onPause() {
+
+		// Release all SoundPool resources
+
+		mSoundPool.unload(mSoundID);
+		mSoundPool.release();
+		mSoundPool = null;
+
+		super.onPause();
+	}
+
+	public void onGesturePerformed(GestureOverlayView overlay, Gesture gesture) {
+
+		// TODO - Get gesture predictions
+		ArrayList<Prediction> predictions = null;
+
+		if (predictions.size() > 0) {
+
+			// Get highest-ranked prediction
+			Prediction prediction = predictions.get(0);
+
+
+			// TODO - Ignore predictions with a score of < MIN_PRED_SCORE and display a
+			// toast message informing the user that no prediction was made. If
+			// the prediction
+			// matches the openMenu gesture, open the menu. If the prediction
+			// matches
+			// the addTen gesture, add 10 bubbles to the screen.
+
+		} else {
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+		}
+	}
+	// BubbleView is a View that displays a bubble.
+	// This class handles animating, drawing, and popping amongst other
+	// actions.
+	// A new BubbleView is created for each bubble on the display
+
+	public class BubbleView extends View {
+
+		private static final int BITMAP_SIZE = 64;
+		private static final int REFRESH_RATE = 40;
+		private final Paint mPainter = new Paint();
+		private ScheduledFuture<?> mMoverFuture;
+		private int mScaledBitmapWidth;
+		private Bitmap mScaledBitmap;
+
+		// location, speed and direction of the bubble
+		private float mXPos, mYPos, mDx, mDy, mRadius, mRadiusSquared;
+		private long mRotate, mDRotate;
+
+		BubbleView(Context context, float x, float y) {
+			super(context);
+			Log.i(TAG, "Creating Bubble at: x:" + x + " y:" + y);
+
+			// Create a new random number generator to
+			// randomize size, rotation, speed and direction
+			Random r = new Random();
+
+			// Creates the bubble bitmap for this BubbleView
+			createScaledBitmap(r);
+
+			// Radius of the Bitmap
+			mRadius = mScaledBitmapWidth / 2;
+			mRadiusSquared = mRadius * mRadius;
+
+			// Adjust position to center the bubble under user's finger
+			mXPos = x - mRadius;
+			mYPos = y - mRadius;
+
+			// Set the BubbleView's speed and direction
+			setSpeedAndDirection(r);
+
+			// Set the BubbleView's rotation
+			setRotation(r);
+
+			mPainter.setAntiAlias(true);
+
+		}
+
+		private void setRotation(Random r) {
+
+			if (speedMode == RANDOM) {
+
+				// Set rotation in range [1..3]
+				mDRotate = ((r.nextInt(3 * BITMAP_SIZE) + 1) / mScaledBitmapWidth);
+			} else {
+				mDRotate = 0;
+			}
+		}
+
+		private void setSpeedAndDirection(Random r) {
+
+			// Used by test cases
+			switch (speedMode) {
+
+				case SINGLE:
+
+					mDx = 20;
+					mDy = 20;
+					break;
+
+				case STILL:
+
+					// No speed
+					mDx = 0;
+					mDy = 0;
+					break;
+
+				default:
+
+					// Set movement direction and speed
+					// Limit movement speed in the x and y
+					// direction to [-3..3] pixels per movement.
+
+					mDx = (r.nextInt(mScaledBitmapWidth * 3) + 1)
+							/ (float) mScaledBitmapWidth;
+					mDx *= r.nextInt() % 2 == 0 ? 1 : -1;
+
+					mDy = (r.nextInt(mScaledBitmapWidth * 3) + 1)
+							/ (float) mScaledBitmapWidth;
+					mDy *= r.nextInt() % 2 == 0 ? 1 : -1;
+
+			}
+		}
+
+		private void createScaledBitmap(Random r) {
+
+			if (speedMode != RANDOM) {
+				mScaledBitmapWidth = BITMAP_SIZE * 3;
+			} else {
+
+				// Set scaled bitmap size in range [1..3] * BITMAP_SIZE
+				mScaledBitmapWidth = r.nextInt(2 * BITMAP_SIZE) + BITMAP_SIZE;
+
+			}
+
+			// Create the scaled bitmap using size set above
+			mScaledBitmap = Bitmap.createScaledBitmap(mBitmap,
+					mScaledBitmapWidth, mScaledBitmapWidth, false);
+		}
+
+		// Start moving the BubbleView & updating the display
+		private void start() {
+
+			// Creates a WorkerThread
+			ScheduledExecutorService executor = Executors
+					.newScheduledThreadPool(1);
+
+			// Execute the run() in Worker Thread every REFRESH_RATE
+			// milliseconds
+			// Save reference to this job in mMoverFuture
+			mMoverFuture = executor.scheduleWithFixedDelay(new Runnable() {
+				@Override
+				public void run() {
+
+					// Implement movement logic.
+					// Each time this method is run the BubbleView should
+					// move one step. If the BubbleView exits the display,
+					// stop the BubbleView's Worker Thread.
+					// Otherwise, request that the BubbleView be redrawn.
+
+					if (moveWhileOnScreen()) {
+						postInvalidate();
+					} else
+						stop(false);
+				}
+			}, 0, REFRESH_RATE, TimeUnit.MILLISECONDS);
+		}
+
+		// Returns true if the BubbleView intersects position (x,y)
+		private synchronized boolean intersects(float x, float y) {
+
+			// Return true if the BubbleView intersects position (x,y)
+
+			float xDist = x - (mXPos + mRadius);
+			float yDist = y - (mYPos + mRadius);
+
+			return xDist * xDist + yDist * yDist <= mRadiusSquared;
+
+		}
+
+		// Cancel the Bubble's movement
+		// Remove Bubble from mFrame
+		// Play pop sound if the BubbleView was popped
+
+		private void stop(final boolean wasPopped) {
+
+			if (null != mMoverFuture) {
+
+				if (!mMoverFuture.isDone()) {
+					mMoverFuture.cancel(true);
+				}
+
+				// This work will be performed on the UI Thread
+				mFrame.post(new Runnable() {
+					@Override
+					public void run() {
+
+						// Remove the BubbleView from mFrame
+						mFrame.removeView(BubbleView.this);
+
+						// If the bubble was popped by user,
+						// play the popping sound
+						if (wasPopped) {
+							mSoundPool.play(mSoundID, mStreamVolume,
+									mStreamVolume, 1, 0, 1.0f);
+						}
+					}
+				});
+			}
+		}
+
+		// Change the Bubble's speed and direction
+		private synchronized void deflect(float velocityX, float velocityY) {
+			mDx = velocityX / REFRESH_RATE;
+			mDy = velocityY / REFRESH_RATE;
+		}
+
+		// Draw the Bubble at its current location
+		@Override
+		protected synchronized void onDraw(Canvas canvas) {
+
+			// save the canvas
+			canvas.save();
+
+			// Increase the rotation of the original image by mDRotate
+			mRotate += mDRotate;
+
+			// Rotate the canvas by current rotation
+			// Hint - Rotate around the bubble's center, not its position
+
+			canvas.rotate(mRotate, mXPos + mScaledBitmapWidth / 2, mYPos
+					+ mScaledBitmapWidth / 2);
+
+			// Draw the bitmap at it's new location
+			canvas.drawBitmap(mScaledBitmap, mXPos, mYPos, mPainter);
+
+			// Restore the canvas
+			canvas.restore();
+
+		}
+
+		// Returns true if the BubbleView is still on the screen after the move
+		// operation
+		private synchronized boolean moveWhileOnScreen() {
+
+			// Move the BubbleView
+
+			mXPos = mXPos += mDx;
+			mYPos = mYPos += mDy;
+
+			return !isOutOfView();
+
+		}
+
+		// Return true if the BubbleView is not on the screen after the move
+		// operation
+		private boolean isOutOfView() {
+
+			return (mXPos < 0 - mScaledBitmapWidth || mXPos > mDisplayWidth
+					|| mYPos < 0 - mScaledBitmapWidth || mYPos > mDisplayHeight);
+		}
+	}
+
+	@Override
+	public void onBackPressed() {
+		openOptionsMenu();
+	}
+
+	@Override
+	public boolean onCreateOptionsMenu(Menu menu) {
+		super.onCreateOptionsMenu(menu);
+
+		getMenuInflater().inflate(R.menu.menu, menu);
+
+		return true;
+	}
+
+	@Override
+	public boolean onOptionsItemSelected(MenuItem item) {
+		switch (item.getItemId()) {
+			case R.id.menu_still_mode:
+				speedMode = STILL;
+				return true;
+			case R.id.menu_single_speed:
+				speedMode = SINGLE;
+				return true;
+			case R.id.menu_random_mode:
+				speedMode = RANDOM;
+				return true;
+			case R.id.quit:
+				exitRequested();
+				return true;
+			default:
+				return super.onOptionsItemSelected(item);
+		}
+	}
+
+	private void exitRequested() {
+		super.onBackPressed();
+	}
+}

app/src/main/res/layout/main.xml

+<?xml version="1.0" encoding="utf-8"?>
+<android.gesture.GestureOverlayView xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/gestures_overlay"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:gestureStrokeLengthThreshold="200.0" >
+
+    <FrameLayout
+        android:id="@+id/frame"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:layout_centerInParent="true" >
+    </FrameLayout>
+
+</android.gesture.GestureOverlayView>
\ No newline at end of file

app/src/main/res/menu/menu.xml

+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android" >
+    <item android:id="@+id/menu_still_mode" android:title="@string/still_mode_string"></item>
+    <item android:id="@+id/menu_single_speed" android:title="@string/single_speed_mode_string"></item>
+    <item android:id="@+id/menu_random_mode" android:title="@string/random_speed_mode_string"></item>
+    <item android:id="@+id/quit" android:title="@string/quit_string"></item>
+</menu>