private void draw() {
// Make sure our drawing surface is valid or we crash
if (ourHolder.getSurface().isValid()) {
// Lock the canvas ready to draw
canvas = ourHolder.lockCanvas();
// Draw the background color
canvas.drawColor(Color.argb(255, 26, 128, 182));
// Resources res = getResources();
// Bitmap bitmap = BitmapFactory.decodeResource(res, R.drawable.background);
// canvas.drawBitmap(bitmap, 0, 0, paint);
// Choose the brush color for drawing
paint.setColor(Color.argb(255, 255, 255, 255));
// Now draw the player spaceship
canvas.drawBitmap(playerShip.getBitmap(), playerShip.getX(), screenY - 110, paint);
// Draw the invaders
for (int i = 0; i < numInvaders; i++) {
if (invaders[i].getVisibility()) {
if (uhOrOh) {
canvas.drawBitmap(
invaders[i].getBitmap(), invaders[i].getX(), invaders[i].getY(), paint);
} else {
canvas.drawBitmap(
invaders[i].getBitmap2(), invaders[i].getX(), invaders[i].getY(), paint);
}
}
}
// Draw the bricks if visible
for (int i = 0; i < numBricks; i++) {
if (bricks[i].getVisibility()) {
canvas.drawRect(bricks[i].getRect(), paint);
}
}
// Draw the players bullet if active
if (bullet.getStatus()) {
canvas.drawRect(bullet.getRect(), paint);
}
// Draw the invaders bullets
// Update all the invader's bullets if active
for (int i = 0; i < invadersBullets.length; i++) {
if (invadersBullets[i].getStatus()) {
canvas.drawRect(invadersBullets[i].getRect(), paint);
}
}
// Draw the score and remaining lives
// Change the brush color
paint.setColor(Color.argb(255, 249, 129, 0));
paint.setTextSize(40);
canvas.drawText("Score: " + score + " Lives: " + lives, 10, 50, paint);
// Draw everything to the screen
ourHolder.unlockCanvasAndPost(canvas);
}
}
private void update() {
// Did an invader bump into the side of the screen
boolean bumped = false;
// Has the player lost
boolean lost = false;
// Move the player's ship
playerShip.update(fps);
// Update the invaders if visible
// Update the players bullet
if (bullet.getStatus()) {
bullet.update(fps);
}
// Update all the invaders bullets if active
for (int i = 0; i < invadersBullets.length; i++) {
if (invadersBullets[i].getStatus()) {
invadersBullets[i].update(fps);
}
}
// Update all the invaders if visible
for (int i = 0; i < numInvaders; i++) {
if (invaders[i].getVisibility()) {
// Move the next invader
invaders[i].update(fps);
// Does he want to take a shot?
if (invaders[i].takeAim(playerShip.getX(), playerShip.getLength())) {
// If so try and spawn a bullet
if (invadersBullets[nextBullet].shoot(
invaders[i].getX() + invaders[i].getLength() / 2, invaders[i].getY(), bullet.DOWN)) {
// Shot fired
// Prepare for the next shot
nextBullet++;
// Loop back to the first one if we have reached the last
if (nextBullet == maxInvaderBullets) {
// This stops the firing of another bullet until one completes its journey
// Because if bullet 0 is still active shoot returns false.
nextBullet = 0;
}
}
}
// If that move caused them to bump the screen change bumped to true
if (invaders[i].getX() > screenX - invaders[i].getLength() || invaders[i].getX() < 0) {
bumped = true;
}
}
}
// Did an invader bump into the edge of the screen
if (bumped) {
// Move all the invaders down and change direction
for (int i = 0; i < numInvaders; i++) {
invaders[i].dropDownAndReverse();
// Have the invaders landed
if (invaders[i].getY() > screenY - screenY / 10) {
lost = true;
}
}
// Increase the menace level
// By making the sounds more frequent
menaceInterval = menaceInterval - 80;
}
if (lost) {
prepareLevel();
}
// Has the player's bullet hit the top of the screen
if (bullet.getImpactPointY() < 0) {
bullet.setInactive();
}
// Has an invaders bullet hit the bottom of the screen
for (int i = 0; i < invadersBullets.length; i++) {
if (invadersBullets[i].getImpactPointY() > screenY) {
invadersBullets[i].setInactive();
}
}
// Has the player's bullet hit an invader
if (bullet.getStatus()) {
for (int i = 0; i < numInvaders; i++) {
if (invaders[i].getVisibility()) {
if (RectF.intersects(bullet.getRect(), invaders[i].getRect())) {
invaders[i].setInvisible();
soundPool.play(invaderExplodeID, 1, 1, 0, 0, 1);
bullet.setInactive();
score = score + 10;
// Has the player won
if (score == numInvaders * 10) {
paused = true;
String mScore = score + "";
Log.d("Score: ", mScore);
Context context = getContext();
Intent intent = new Intent(context, ScoreActivity.class);
intent.putExtra("score", mScore);
context.startActivity(intent);
}
}
}
}
}
// Has an alien bullet hit a shelter brick
for (int i = 0; i < invadersBullets.length; i++) {
if (invadersBullets[i].getStatus()) {
for (int j = 0; j < numBricks; j++) {
if (bricks[j].getVisibility()) {
if (RectF.intersects(invadersBullets[i].getRect(), bricks[j].getRect())) {
// A collision has occurred
invadersBullets[i].setInactive();
bricks[j].setInvisible();
soundPool.play(damageShelterID, 1, 1, 0, 0, 1);
}
}
}
}
}
// Has a player bullet hit a shelter brick
if (bullet.getStatus()) {
for (int i = 0; i < numBricks; i++) {
if (bricks[i].getVisibility()) {
if (RectF.intersects(bullet.getRect(), bricks[i].getRect())) {
// A collision has occurred
bullet.setInactive();
bricks[i].setInvisible();
soundPool.play(damageShelterID, 1, 1, 0, 0, 1);
}
}
}
}
// Has an invader bullet hit the player ship
for (int i = 0; i < invadersBullets.length; i++) {
if (invadersBullets[i].getStatus()) {
if (RectF.intersects(playerShip.getRect(), invadersBullets[i].getRect())) {
invadersBullets[i].setInactive();
lives--;
soundPool.play(playerExplodeID, 1, 1, 0, 0, 1);
// Is it game over?
if (lives == 0) {
paused = true;
// lives = 3;
// score = 0;
String mScore = score + "";
Context context = getContext();
Intent intent = new Intent(context, ScoreActivity.class);
intent.putExtra("score", mScore);
context.startActivity(intent);
// prepareLevel();
}
}
}
}
}