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Flash Professional CS5: Creating a Simple Game for Android Devices

Using the swipe gesture


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Flash Professional CS5: Creating a Simple Game for Android Devices

with Paul Trani
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  1. 1m 48s
    1. Welcome
      1m 0s
    2. Using the exercise files
      48s
  2. 7m 16s
    1. Understanding the user
      4m 2s
    2. Flash content on Android devices
      3m 14s
  3. 17m 28s
    1. Reviewing the game
      1m 50s
    2. Creating a file in Device Central
      5m 39s
    3. Reviewing the game structure
      8m 23s
    4. Adding code snippets
      1m 36s
  4. 36m 13s
    1. Animating the intro screen
      8m 13s
    2. Moving the player
      8m 13s
    3. Adding enemies
      6m 49s
    4. Adding movement
      4m 16s
    5. Adding chance and randomness
      8m 42s
  5. 34m 30s
    1. Adding lasers
      8m 14s
    2. Detecting collisions
      7m 57s
    3. Adding explosions
      6m 26s
    4. Removing assets from the stage
      8m 50s
    5. Adding audio
      3m 3s
  6. 33m 12s
    1. Adding scoring and levels
      7m 41s
    2. Subtracting lives and ending the game
      4m 26s
    3. Creating a results screen
      5m 8s
    4. Displaying the score
      6m 57s
    5. Saving and loading game results
      9m 0s
  7. 17m 14s
    1. Detecting movement with the Accelerometer
      6m 39s
    2. Using the swipe gesture
      4m 42s
    3. Using hardware keys
      5m 53s
  8. 23m 18s
    1. Handling exits and idle mode
      3m 31s
    2. Handling activation and deactivation
      6m 14s
    3. Optimizing graphics
      7m 14s
    4. Optimizing ActionScript
      6m 19s
  9. 34m 41s
    1. Creating the application files
      8m 23s
    2. Creating the app (Mac)
      5m 5s
    3. Creating the app (PC)
      7m 19s
    4. Publishing to an Android device (Mac)
      7m 7s
    5. Publishing to an Android device (PC)
      6m 47s
  10. 8m 56s
    1. Uploading to the Android market
      7m 7s
    2. Downloading from the Android market
      1m 49s
  11. 1m 22s
    1. Next steps
      1m 22s

Video: Using the swipe gesture

One of the great things about creating games for mobile devices is also the touch screen. Now, with touch screens you can have gestures. And what I meant by gestures is you can, for instance, use two fingers to rotate an object or the same two fingers to maybe magnify an image--things like that. And you can add that into your game. And I am just going to go ahead and integrate that into this IntroScreen right here. So if they're playing this game on a device, they're going to be able to just take one finger and swipe with it.

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Flash Professional CS5: Creating a Simple Game for Android Devices
3h 35m Intermediate Feb 15, 2011

Viewers: in countries Watching now:

In Flash Professional CS5: Creating a Simple Game for Android Devices, author Paul Trani shows how to translate existing Flash skills from the web to mobile devices while designing a game in Flash and publishing it as an AIR for Android app. The finished application includes collision detection, random enemy creation and movement, shooting capabilities, multiple levels, and even a high score screen. This course also goes beyond game functionality and shows how to use mobile capabilities such as the accelerometer and gestures to control graphics, use the hardware keys to activate menus, and also how to optimize content so it plays well on mobile devices. Also included are instructions for distributing an app through the Android Market. Exercise files are included with the course.

Topics include:
  • Designing for mobile platforms
  • Creating and optimizing game graphics
  • Adding random movement and interactivity
  • Moving players based on the accelerometer
  • Using gestures
  • Detecting collisions
  • Implementing audio
  • Adding scoring and levels
  • Implementing a high score screen
  • Publishing an app on both Mac and Windows
  • Uploading to the Android Market
Subjects:
Developer Web Games Projects
Software:
Device Central Flash Professional Android
Author:
Paul Trani

Using the swipe gesture

One of the great things about creating games for mobile devices is also the touch screen. Now, with touch screens you can have gestures. And what I meant by gestures is you can, for instance, use two fingers to rotate an object or the same two fingers to maybe magnify an image--things like that. And you can add that into your game. And I am just going to go ahead and integrate that into this IntroScreen right here. So if they're playing this game on a device, they're going to be able to just take one finger and swipe with it.

So they don't have to hit the Play button. The whole screen is basically the Play button. And when they swipe with one finger, this screen is going to slide off. All right! And I am going to do this by using the Code Snippets panel in that Mobile Game folder. I am going to add a gesture swipe. So I am just going to double-click on that, and it's going to add that code to my Actions Frame in the Actions layer down at the bottom. So it says Gesture Swipe. I am first defining the input mode as being GESTURE.

Because I can also include various touch points, but gestures are basically a subset of a multi-touch touch points. So this basically is going to be really easy to use because in this case I am going to use Gesture Swipe. Also, what's available is zoom, Gesture rotate, and Gesture pan. All right, in this case I am just going to use the Swipe. So that's defined in right in here instance_name_here. Well, what do I want to swipe? I want to swipe the intro screens.

Let's go ahead and take all of this code and I am going to cut it, and I am going to move it up to the top of the Actions panel, where I see this intro screen. Right here, notice this is the EventListener and the function for the Play button. So just beneath that, I am just going to go ahead and paste in that gesture swipe, right in here. And so what I want to do is I am going to go ahead and move the introScreen. In fact, the whole thing is going to be the button. So I am just going to copy that word "introScreen" and I am going to paste it right in here.

So when there is a Gesture Swipe that's performed on the introScreen, go ahead and fire off this function called swipeAway. Within this function, I can go ahead and tap into a couple of different properties. Say for instance, if there is the Swipe Left, which is the offsetX, okay. So if the offsetX is equal to negative one, it's going to move to the left. So Swipe Left is going to be minus one, and then if you want to go to the right, it's going to be one.

If you want to go up, then the offsetY is going to be minus one. And the offsetY, if you want to move it down, then it's going to be one. And that will move it down. All right! So these are the different swipes you can do. You can basically swipe any sort of object you want. But really in here in this if statement is where I can go ahead and do something. In this case, the thing I want to do is I just want to go ahead and move that screen off.

So if they swipe to the left, go ahead and call this function called moveScreenOff. So I am just going to copy that and paste it right in here, moveScreenOff. Well, what do I want to move off? I want to move off the introScreen. So again, if they swipe the left, just go ahead and call this function, pass in that screen name, and what this tween does is this actually moves it off to the left-hand side. It's really that simple. And again it's just a simple gesture swipe is what's going to happen here on the introScreen.

So normally, I would test it in Device Central. Device Central actually does have, if I do a Device Central test, it does actually have a Multi-Touch panel. But quite frankly, not all of the Multi-Touch features work in it. So the Gesture zoom, the Gesture rotate will work in here. But in this case, what I want to do is I want to test this out on an actual device to show you that this is working. So here's the game on an actual device. And what I want to do is I am just going to go ahead and swipe with one finger to the left.

And you can see I am actually right into the game, and I can start playing it. Again, gesture swipe is really easy to use, and it adds additional functionality that you can use in your game.

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