Android is an operating system for mobile devices developed and maintained by Google, Inc. This tag should contain specific programming questions about Android.

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5
votes
4answers
1k views

Better way to generate enemies of different sub-classes

So lets pretend I have an enemy class that has some generic implementation and inheriting from it I have all the specific enemies of my game. There are points in my code that I need to check whether ...
1
vote
0answers
82 views

Android opengles how to use glunproject

How to use glunproject in my android app? I have the following parts in my engine: A projection matrix A view matrix for the camera A model matrix for each of the objects in my world. This matrix ...
4
votes
1answer
2k views

Google Play 3rd Party Payment Allowed?

Does Google allow 3rd party payment solutions to be enabled in developers' apps (i.e., Paypal, carrier/SMS payment), especially in countries where Google Checkout isn't present? Or does this violate ...
0
votes
1answer
386 views

Develop a 2d isometric mobile game on Flash [closed]

I'm building a game on Flash that will run on web/Android/iOS. The game is 2d isometric.I heard that developing mobile apps on Flash sucks and the graphics looks just awful.It'd be quite uncomfortable ...
1
vote
1answer
116 views

Can't call method out of a timer. Why? [closed]

I have another problem i can't solve by myselve. My situation: I have four FrameLayouts in LinearLayouts. I color them, set Layout hight and width at wrap content and just change the minwidth to ...
1
vote
1answer
897 views

Get back or delete an existing OpenGL object, then change it and draw at new. How?

With OpenGL i'm drawing for example a circle. Can i take this drawn circle back out of the window and change something and then draw it back on the window? Or can i /have to delete it and then draw ...
3
votes
0answers
1k views

How to make the background of an OpenGL object transparent? [closed]

It sounds so simple but i didn't get it to work. The Background of my FrameLayout where i add the GLSurfaceView in is colored blue but there is only black. So here is my method to initiate the ...
2
votes
1answer
450 views

How to draw an OpenGL object in another on Android? -> Eyes and Eyeballs

As i allready wrote in another question: I'm working on OpenGL since a Week, so i'm new to the most stuff. (also my englisch isn't the best. Hop you can understand the most anyway) So i'm ...
3
votes
3answers
373 views

Javascript board game: looking for optimization

I posted this question on stackoverflow before but received no answers so I decided to post it here and see if someone could suggest me something. I'm working on a html/javascript game for android. ...
1
vote
1answer
366 views

Cost of changing scene in andengine

I'm working on a simple 2d puzzle with small textures (in count and quantity). Now after I finished the game logic I'm considering tow options to switch between levels: Remove all objects manually ...
8
votes
2answers
967 views

What's the best way to draw lots of trees

I'm writing an app which renders a random island planted with trees. The trees are currently two quads, criss-crossed and drawn with textures. I plan to have more complex meshes that form different ...
0
votes
1answer
1k views

'No Platforms Found' error in Unity Android

I am having a problem with Unity Android - every time I try to "build", a 'No Platforms Found' error pops up. Thing is that I already have Android SDK in my computer (copied it into my G drive from ...
0
votes
2answers
986 views

How do I stop overlapping shapes when collision detected in AndEngine?

I am making a very simple demo in AndEngine in which I have three rectangles: rect1, rect2 and rect3 in an ArrayList. I register onAreaTouch as follows: @Override public boolean onAreaTouched(...
2
votes
2answers
2k views

How can I control the frame update rate of a thread?

I'm building a small game for a college project. It's quite a simple game. There are a number of dots on the screen and the player has to select them in a specific order. It's kind of a "join the dots"...
2
votes
2answers
2k views

GLSL Motion blur on mobile.. possible at acceptable framerates?

I have been struggling to implement a simple linear motion blur effect on mobile (Android, OpenGLES 2.0) but it just seems to destroy my framerate. I'm rendering to texture (FBO) then applying a ...
1
vote
0answers
213 views

Android multi screen rendering

Is it possible on Android to render specifically / only, to the connected Monitor/TV on the hdmi port? If so, is it possible to use OpenGL ES to render a different scene on the monitor and on the ...
-5
votes
2answers
2k views

Moving a sprite diagonal?

I wonder how I should increase and decrease the value of xPos and yPos to be able to move a sprite object diagonal and in different angles? canvas.drawBitmap(image, xPos - (image.getWidth() / 2), ...
2
votes
4answers
5k views

How do I detect pixel-level collision using andEngine?

I'm developing a game for Android using andEngine, and I need to detect collisions only when two objects visually collide (not in blank space of the image). In J2ME, I'm able to do that using ...
1
vote
2answers
4k views

Pixel perfect collision detection between sprite and animated sprite

I am trying to make a collision between a sprite and an animated sprite. The animated sprite is the main character of the game. The problem I am facing is that when another sprite collides with the ...
3
votes
1answer
1k views

Move Background in AndEngine for a Racing Game

I am new to game development and AndEngine. I have small query about racing game. I am going to develop a bike racing game. For bike racing game we will move the background or the player. I am tried ...
0
votes
1answer
190 views

Android activities, when to use them?

I'm getting back into programming my game and I can see that I've used activities for so many things. I only have one with a custom-view (my actual game), the others are activities with XML-views, ...
5
votes
1answer
267 views

GLImpl.gldrawelements longer than usual

I'm developing a little game engine for the Android platform and I'm trying to improve the performance of this one. (I'm not an OpenGL expert) I can see a framerate drop sometimes, when using DDMS ...
1
vote
2answers
635 views

Why doesn't a line draw after instantiating it on a thread other than the renderer thread?

I'm making a 2D game with OpenGL ES 2.0 on Android, as an excuse to learn a bunch of things. I'm drawing many lines to make a grid, but setting everything up takes time and I'd like to render a ...
-6
votes
1answer
123 views

Android Game an [closed]

I want to develop an android game (3D/2D).. and I don't have any knowledge about android app development. So can you suggest some helpful and understandable resources like video tutorials or head ...
4
votes
1answer
7k views

Game engines that publish to android and iOS

I am about to start on a project which, at a minimum needs to go out to android and ios. Are there any game engines other then Unity which can publish to both? I fear that Unity3d might be more ...
0
votes
3answers
5k views

Implementing a basic jump in libgdx

I have seen the document for libgdx and managed to move the character and also to implement bounds but the document does not show how to implement jumping. I have downloaded the superjumper demo code ...
1
vote
1answer
5k views

How to initialize a BitmapDrawable Android

I have been using a shapeDrawable object for my android games player but now that i want to add some graphics in I have to use something different I was thinking of a BitmapDrawable but as I am new to ...
1
vote
2answers
449 views

OpenGL ES multiple indices

I need suggestions for the best method of acheiving what I am trying to do: -Using either OpenGL ES 1.x or 2.x I need to pass a bunch of vertices to the GPU. Each one has 3 attributes: Position, ...
0
votes
1answer
4k views

How to scroll background image-Android App

Basically, I have a main menu, and I would like the background image to scroll (parallax I believe is the term? Like the Angry Bird's title screen background). However, I'm used to just having a ...
12
votes
8answers
5k views

Converting a 2D curve into points for data storage

I’ve created an algorithm which converts any curve i.e. path into minimum number of points so that I can save it into a file or database. The method is simple: it moves three points in equal steps ...
-4
votes
2answers
1k views

How to fire a bullet in a specific direction?

I am developing an Android game. I have problem with bullet firing. It's a space ship that has to fire bullets but right now it's firing in a random direction. I have to fire a bullet to the enemy ...
3
votes
3answers
3k views

What are the benefits of using a 2D game engine on Android?

I have thought about just coding a 2D game on Android using just pure Java and the Android SDK, no engines like libdgx, cocoa-2dx attached. I don't know if I really need to use a game engine or not. ...
1
vote
1answer
2k views

Is there a way to make a game using lwjgl work on android?

I'm working on a platformer and I'd like to make an android version. Do I need to rewrite everything for android, or can I use something to make the lwjgl code work with android?
2
votes
2answers
5k views

LibGDX Swipe Detection Left and Right

I have displayed an image at the center of the screen with libgdx. If I swipe left, the image should move to the left; and, if I swipe right, image should move to the right. Subsequent swipes to the ...
2
votes
1answer
4k views

How to implement bullet physics in libgdx

I am new at game development want to know that how can I implement bullet physics in libgdx. I searched lot of things on Internet but nothing found worthy.
0
votes
2answers
3k views

Libgdx Animation Timing

I'm having a small issue with libgdx animation. I'm using getKeyFrame() to get the current frame of the animation and I'm updating the state time by adding on deltaTime in my update function for the ...
0
votes
1answer
989 views

Rotation of Rectangle along Y-axis transformed to parallelogram

After the rotation of a rectangular view along the Y-axis, about its center, transformed into parallelogram, how do I get the rotated parallelogram coordinates? By Y-axis, I mean perpendicular to the ...
2
votes
0answers
28 views

How do I create a scrollableparallax background in AndEngine GLES1 [duplicate]

In my game I want my background to move side by side as the player moves on screen in AndEngine. I moved my sprite using analogScreenControl. I am using AndEngine GLES1. i don't want to move my ...
4
votes
1answer
3k views

How do I implement an AutoParallax Background in AndEngine GLES1?

I'm using AndEngine GLES1. In my game, I use AnalogOnScreenControl to move a sprite and when it moves vertically, the background image also moves vertically. I want to do something like this: that is ...
-1
votes
1answer
688 views

2d triangle with OpenGL-Es on Android

hey I am trying to draw a triangle on opengl es . I just followed a tutorial to do it. eventhough everything seems to be fine it does not work. everytime I run my code it sends me back to main menu. ...
8
votes
1answer
284 views

Collision Detection Slows Screen Drawing

I have recently been pursuing game development as a hobby, and decided that in order to learn the in's and out's of game development, that I should create a game and render everything myself (without ...
-3
votes
1answer
5k views

Difference between libgdx and andengine [closed]

How to choose between libgdx and andengine?. Some people suggest using ligdx. Some others prefer andengine. If someone is favouring one above the other what would he consider choosing betweeen the two?...
-3
votes
1answer
266 views

java app goes too slow in android os [closed]

The problem is that my java app contains too many animated sprites and it runs very slowly on android system. Does the usage of .gif animation instead of sprite animation will improve the speed? I ...
0
votes
1answer
1k views

Using compressed(ETC1) textures in LibGDX

I use standard android tool for compressing PNG texture and archiving it with gzip: /android-sdks/tools/etc1tool texture.png --encodeNoHeader gzip texture.pkm Then I try to load it: FileHandle ...
4
votes
1answer
2k views

Poor image quality on Android through Unity Remote

I have started to work on the company's latest project using Unity3D and the workflow is just awesome. The problem is when running the game on a real Android device (using Unity Remote) the image ...
2
votes
2answers
3k views

How to Change default Mouse pointer on emulator in Android?

I want to change default mouse pointer in Android emulator. I want to change it for my game to use different type of cursor.I am using AndEngine for my game development. Is there nay way to change ...
4
votes
2answers
125 views

Should I target a mobile phone or simulation tools are good enough?

I'm starting mobile development, and I would want to know if it's necessary to target a specific smartphone, or nowadays one can run a simulation that will provide accurate data of how the game will ...
4
votes
2answers
4k views

Making color of sprite darker or lighter

Is there any way to make a sprite darker or lighter in AndEngine? I dont want to use the alpha thing. Nor I want to loose the texture/design of the image.
1
vote
2answers
6k views

What matrix operations do I perform to translate then rotate then translate then rotate?

In an android game I want to draw a running leg. To output the thigh I do something like: // legCX,legCY is the location on screen about which the leg rotates. Matrix m = new Matrix(); m....
1
vote
2answers
3k views

Detecting Screen Resolution in Android/AndEngine to display high or low quality images

I am developing a game with 1024x600 resolution. I can't target smaller resolution devices at this resolution, so I intend to use two graphics for the game. How do I detect which graphics to use for ...