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The only difference is that there is no inner class extending There is nothing new here compared to theĪctivity class from the Breakout project. The courses above are up to 95% off - by clicking on ad above. We will then look at each of the classes, in turn, starting with
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Just for clarity, the code for each of the five new classes is shown below (excluding the package declaration at the top of each class). Invader classes. You should now have six classes in total including Now do the same and create new classes for
This helps us to compartmentalize our code and keep it organized into logical areas to a greater extent than we did previously. As previously mentioned the class is not an inner class as the view was in the Breakout project.
We have now created a new Java class in a separate file called SpaceInvadersView.java. Now enter SpaceInvadersView as the name for our new class and click OK. Now select New|Java class then select …\app\source\main\java and click OK.
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Now, Right-click the java folder in the Android Studio project explorer as shown in the next image. With this in mind let’s create those empty classes.
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All we will need to do is implement each object, in turn, initialize it, update it and draw it. SpaceInvadersView to add new declarations. By creating empty implementations of all these classes we can then declare objects of them in We will require the following classes.īullet. We want to create classes to represent the view and the game objects we have just discussed. This changes nothing about how we code it internally but it does make the whole project more manageable. Furthermore, we will also take the inner class which represents the view of the game and make it a class in its own right. So we will have one for the player’s ship, one for an invader, a bullet and the brick of a defence shelter. But far from adding complexity, we will see how by separating out further the code in the different files we will make our Space Invaders project simpler to write, manage and extend.Įach game object will be represented by its own class. The class structureįor this project, we will vary slightly from the structure of the Breakout project. When you have your preferred sound FX, using your operating system’s file browser go to the app\src\main folder of the project and create a folder called assets. You can also listen to each of the sounds by using the media controls below each of the links. Just make sure you use exactly the same file names.
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You can create your own or download mine by right-clicking on the files listed below. Of course, we need to add the sound files to our project.
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Immediately below SpaceInvadersActivity but BEFORE the newly positioned > type or copy and paste these two lines to make the game run full screen and lock it in the landscape talk a bit about the assets we will use in Space Invaders.Tap the enter key a couple of times to move the > a couple of lines below the rest of the line shown above. Place the cursor before the closing > shown above.In the AndroidManifest.xml file, locate the following line of code,Īndroid : name = ".SpaceInvadersActivity" >.In the project explorer pane in Android Studio double click on the manifests folder, this will open up the AndroidManifest.xml file in the code editor.We want to use every pixel that the device has to offer so we will make changes to the app’s AndroidManifest.xml configuration file. To get started create a new project in Android Studio, call it Space Invaders and name the Activity SpaceInvadersActivity then read on because we will do things slightly differently compared to the Breakout project.
The space invaders must be taken out quickly and efficiently to survive. Eventually they will be moving so fast the player is doomed. When the invaders reach the side of the screen they will drop down and scroll back the other way a little bit faster. If they hit a player he loses a life if they hit a shelter it will crumble until eventually the player has nowhere to hide. The Invaders will slide across the screen flapping their arms and spitting bullets. As the player also needs to shoot at the invaders we will respond to when the screen is touched slightly higher than the lower part as well. The finished game will allow the player to move left and right by holding the corresponding side of the screen near the bottom.