diff options
Diffstat (limited to 'Android/07-Graphics/GraphicsLab/src/course')
| -rw-r--r-- | Android/07-Graphics/GraphicsLab/src/course/labs/GraphicsLab/BubbleActivity.java | 344 |
1 files changed, 344 insertions, 0 deletions
diff --git a/Android/07-Graphics/GraphicsLab/src/course/labs/GraphicsLab/BubbleActivity.java b/Android/07-Graphics/GraphicsLab/src/course/labs/GraphicsLab/BubbleActivity.java new file mode 100644 index 0000000..fed77d7 --- /dev/null +++ b/Android/07-Graphics/GraphicsLab/src/course/labs/GraphicsLab/BubbleActivity.java @@ -0,0 +1,344 @@ +package course.labs.GraphicsLab; + +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.graphics.Bitmap; +import android.graphics.BitmapFactory; +import android.graphics.Canvas; +import android.graphics.Paint; +import android.media.AudioManager; +import android.media.SoundPool; +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.widget.RelativeLayout; + +public class BubbleActivity extends Activity { + + // 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; + private static int speedMode = RANDOM; + + private static final int MENU_STILL = Menu.FIRST; + private static final int MENU_SINGLE_SPEED = Menu.FIRST + 1; + private static final int MENU_RANDOM_SPEED = Menu.FIRST + 2; + + private static final String TAG = "Lab-Graphics"; + + // Main view + private RelativeLayout mFrame; + + // Bubble image + 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; + + @Override + public void onCreate(Bundle savedInstanceState) { + super.onCreate(savedInstanceState); + + setContentView(R.layout.main); + + // Set up user interface + mFrame = (RelativeLayout) findViewById(R.id.frame); + + // Load basic bubble Bitmap + mBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.b64); + } + + @Override + protected void onResume() { + super.onResume(); + + // Manage bubble popping sound + // Use AudioManager.STREAM_MUSIC as stream type + mAudioManager = (AudioManager) getSystemService(AUDIO_SERVICE); + + mStreamVolume = (float) mAudioManager.getStreamVolume(AudioManager.STREAM_MUSIC) / mAudioManager.getStreamMaxVolume(AudioManager.STREAM_MUSIC); + + // TODO - make a new SoundPool, allowing up to 10 streams + mSoundPool = null; + + // TODO - set a SoundPool OnLoadCompletedListener that calls setupGestureDetector() + // TODO - load the sound from res/raw/bubble_pop.wav + mSoundID = 0; + } + + @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) { + int numberChilds = mFrame.getChildCount(); + for (int i = 0; i < numberChilds; i++) { + final BubbleView bubble = (BubbleView) mFrame.getChildAt(i); + bubble.deflect(velocityX, velocityY); + } + + return true; + } + + // 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 false; + } + }); + } + + @Override + public boolean onTouchEvent(MotionEvent event) { + // TODO - delegate the touch to the gestureDetector + return false; + } + + @Override + protected void onPause() { + // TODO - Release all SoundPool resources + super.onPause(); + } + + // BubbleView is a View that displays a bubble. + // This class handles animating, drawing, popping amongst other actions. + // A new BubbleView is created for each bubble on the display + private 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; + private long mRotate, mDRotate; + + public BubbleView(Context context, float x, float y) { + super(context); + log("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); + + // Adjust position to center the bubble under user's finger + mXPos = x - mScaledBitmapWidth / 2; + mYPos = y - mScaledBitmapWidth / 2; + + // 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) { + // TODO - set rotation in range [1..3] + mDRotate = 0; + } else { + mDRotate = 0; + } + } + + private void setSpeedAndDirection(Random r) { + + // Used by test cases + switch (speedMode) { + case SINGLE: + // Fixed speed + mDx = 10; + mDy = 10; + break; + case STILL: + // No speed + mDx = 0; + mDy = 0; + break; + default: + // TODO - Set movement direction and speed + // Limit movement speed in the x and y + // direction to [-3..3]. + } + } + + private void createScaledBitmap(Random r) { + if (speedMode != RANDOM) { + mScaledBitmapWidth = BITMAP_SIZE * 3; + } else { + //TODO - set scaled bitmap size in range [1..3] * BITMAP_SIZE + mScaledBitmapWidth = 0; + } + // TODO - create the scaled bitmap using size set above + mScaledBitmap = null; + } + + // 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() { + // TODO - 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. + } + }, 0, REFRESH_RATE, TimeUnit.MILLISECONDS); + } + + private synchronized boolean intersects(float x, float y) { + // TODO - Return true if the BubbleView intersects position (x,y) + return false; + } + + // Cancel the Bubble's movement + // Remove Bubble from mFrame + // Play pop sound if the BubbleView was popped + private void stop(final boolean popped) { + if (null != mMoverFuture && mMoverFuture.cancel(true)) { + // This work will be performed on the UI Thread + mFrame.post(new Runnable() { + @Override + public void run() { + // TODO - Remove the BubbleView from mFrame + if (popped) { + log("Pop!"); + // TODO - If the bubble was popped by user, + // play the popping sound + } + log("Bubble removed from view!"); + } + }); + } + } + + // Change the Bubble's speed and direction + private synchronized void deflect(float velocityX, float velocityY) { + log("velocity X:" + velocityX + " velocity Y:" + velocityY); + //TODO - set mDx and mDy to be the new velocities divided by the REFRESH_RATE + mDx = 0; + mDy = 0; + } + + // Draw the Bubble at its current location + @Override + protected synchronized void onDraw(Canvas canvas) { + // TODO - save the canvas + // TODO - increase the rotation of the original image by mDRotate + // TODO Rotate the canvas by current rotation + // TODO - draw the bitmap at it's new location + // TODO - restore the canvas + } + + + private synchronized boolean moveWhileOnScreen() { + // TODO - Move the BubbleView + // Returns true if the BubbleView has exited the screen + return false; + + } + + private boolean isOutOfView() { + // TODO - Return true if the BubbleView has exited the screen + return false; + } + } + + // Do not modify below here + @Override + public boolean onCreateOptionsMenu(Menu menu) { + super.onCreateOptionsMenu(menu); + menu.add(Menu.NONE, MENU_STILL, Menu.NONE, "Still Mode"); + menu.add(Menu.NONE, MENU_SINGLE_SPEED, Menu.NONE, "Single Speed Mode"); + menu.add(Menu.NONE, MENU_RANDOM_SPEED, Menu.NONE, "Random Speed Mode"); + return true; + } + + @Override + public boolean onOptionsItemSelected(MenuItem item) { + switch (item.getItemId()) { + case MENU_STILL: + speedMode = STILL; + return true; + case MENU_SINGLE_SPEED: + speedMode = SINGLE; + return true; + case MENU_RANDOM_SPEED: + speedMode = RANDOM; + return true; + + default: + return super.onOptionsItemSelected(item); + } + } + + private static void log (String message) { + try { + Thread.sleep(500); + } catch (InterruptedException e) { + e.printStackTrace(); + } + Log.i(TAG,message); + } +} |