Added sounds and soundtracks.

Author: MrGussio

android/assets/sound/explosion.wav

@@ -1,6 +1,7 @@
 package ga.gussio.ld38.earthinvaders.entities;
 
 import com.badlogic.gdx.Gdx;
+import com.badlogic.gdx.audio.Sound;
 import com.badlogic.gdx.graphics.Color;
 import com.badlogic.gdx.graphics.Texture;
 import com.badlogic.gdx.graphics.g2d.Sprite;
@@ -28,9 +29,12 @@ public class Meteorite extends Entity {
     private Rectangle warningRect;
     private long warningTime;
     private Sprite[] img, warning;
+    private Sound sound;
 
-    public Meteorite(Sprite[] textures, Sprite[] warning) {
+    public Meteorite(Sprite[] textures, Sprite[] warning, Sound sound) {
         super(0, 0);
+        this.sound = sound;
+
         Random r = new Random();
         int direction = r.nextInt(360+1);
         health = r.nextInt(2)+3;
@@ -110,5 +114,6 @@ public void destroy(){
         GameScreen.entities.add(new Explosion((int) collision.getXCenter(),
                 (int) collision.getYCenter()));
         GameScreen.entities.remove(this);
+        sound.play(0.6f);
     }
 }

android/assets/sound/shoot1.wav

@@ -1,6 +1,7 @@
 package ga.gussio.ld38.earthinvaders.entities;
 
 import com.badlogic.gdx.Gdx;
+import com.badlogic.gdx.audio.Sound;
 import com.badlogic.gdx.graphics.Color;
 import com.badlogic.gdx.graphics.Texture;
 import com.badlogic.gdx.graphics.g2d.Sprite;
@@ -24,11 +25,17 @@ public class Player extends Entity {
 
     private Sprite img;
 
+    private Sound[] shoot;
+
     public Player() {
         super(0, 0);
         this.x = (float) (GameScreen.earth.getXCenter() + radius*Math.sin(angle));
         this.y = (float) (GameScreen.earth.getYCenter() + radius*Math.cos(angle));
         img = new Sprite(new Texture(Gdx.files.internal("player.png")));
+        shoot = new Sound[4];
+        for(int i = 1; i <= shoot.length; i++){
+            shoot[i-1] = Gdx.audio.newSound(Gdx.files.internal("sound/shoot"+i+".wav"));
+        }
     }
 
     @Override
@@ -57,6 +64,8 @@ public void shoot(){
         if(shootInterval == maxShootInterval){
             GameScreen.entities.add(new Bullet(Game.WIDTH/2, Game.HEIGHT/2, angle));
             shootInterval--;
+            Random r = new Random();
+            shoot[r.nextInt(3)+1].play(0.6f);
         }
     }
 

android/assets/sound/shoot2.wav

@@ -1,6 +1,8 @@
 package ga.gussio.ld38.earthinvaders.screen;
 
 import com.badlogic.gdx.Gdx;
+import com.badlogic.gdx.audio.Music;
+import com.badlogic.gdx.audio.Sound;
 import com.badlogic.gdx.files.FileHandle;
 import com.badlogic.gdx.graphics.Color;
 import com.badlogic.gdx.graphics.OrthographicCamera;
@@ -54,6 +56,9 @@ public class GameScreen extends Screen implements InputListener {
     private int scoreTimer = 0;
     private boolean appliedScore = false;
 
+    private Music soundtrack;
+    private Sound meteorDestroySound;
+
     public GameScreen() {
         entities.clear();
         camera = new OrthographicCamera();
@@ -86,6 +91,11 @@ public GameScreen() {
         exit = new Button(1230, 450, "buttons/exit.png");
         retry = new Button(500, 450, "buttons/retry.png");
 
+        soundtrack = Gdx.audio.newMusic(Gdx.files.internal("sound/soundtrack.wav"));
+        meteorDestroySound = Gdx.audio.newSound(Gdx.files.internal("sound/explosion.wav"));
+
+        soundtrack.setLooping(true);
+        soundtrack.play();
         //generating randomized background
         Random r = new Random();
         background = new Particle[r.nextInt(55-45)+45];
@@ -182,7 +192,7 @@ else if (rightButton.clicked)
             }
 
             if (System.currentTimeMillis() > spawnTimer) {
-                entities.add(new Meteorite(meteoriteSprites, warningSprites));
+                entities.add(new Meteorite(meteoriteSprites, warningSprites, meteorDestroySound));
                 long dtime = System.currentTimeMillis() - startTime;
                 if (dtime > 10000) {
                     startTime = System.currentTimeMillis();
@@ -224,6 +234,9 @@ public void dispose() {
         health = maxHealth;
         score = 0;
         dmgAnimation = 0;
+        soundtrack.stop();
+        soundtrack.dispose();
+        meteorDestroySound.dispose();
     }
 
     public static void damageEarth(int hits){