Operating system for mobile devices. For non-developer questions, see http://android.stackexchange.com

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0
votes
1answer
330 views

Saving an interface instance into a Bundle

All I've have an interface that allows me to switch between different scenes in my Android game. When the home key is pressed, I am saving all of my states (score, sprite positions etc) into a ...
0
votes
1answer
78 views

Why is mesh baking causing huge performance spikes?

A couple of seconds into the gameplay on my Android device, I see huge performance spikes caused by "Mesh.Bake Scaled Mesh PhysX CollisionData" In my game, a whole level is a parent object containing ...
15
votes
7answers
11k views

How to capture video of my mobile game?

I've been keeping a blog for my current Android game and as I get closer to an actual playable version of the game, screenshots just aren’t enough to show new progress anymore. What I need is video. ...
0
votes
1answer
315 views

Problem converting FBX file into XNB

I create a Monogame Content Project to convert assets into XNB. For FBX file without texture there is no problem: the file is correctly converted and when I load XNB into my project everything is ok. ...
1
vote
0answers
25 views

How do you calculate the rate of rotation using the accelerometer values in Android for a particular axis?

I am developing a simple game which involves a character moving up and down only along the Y axis. Currently I am using the accelerometer readings to change the Y velocity of the character. The game ...
1
vote
2answers
64 views

How do I inline images between text in a Table?

I have a Table and a Label with wrapped text. I want to display some images in-line with the text. For example: This is an image -IMAGE_HERE-, and now some more text showing, yet, another image ...
0
votes
0answers
43 views

How can I use a Seekbar as a brightness slider?

I am using the GLSurfaceView Renderer. I want changes to a seek bar's progress to increase the brightness of a GLSurfaceView proportionally. How do I apply a color matrix to a GLSurface view? Is ...
0
votes
1answer
67 views

Android AndEngine creating a body behind the sprite exactly

I am using AndEngine for Android. I created a body, but it is not behind the sprite as I wanted. Body.setTransform(Sprite.getX()/32, Sprite.getY()/32, 0); This is ...
1
vote
1answer
128 views

How to move a Entity without moving its children in AndEngine?

I have a Entity in AndEngine and when I move it, all child move together with it. Which is great. But, sometimes, I need to move it without moving its children. Is it even possible? And, if it is, how ...
1
vote
0answers
81 views

Android and OpenGL, single thread vs double thread

I'm trying to optimize my Android OpenGL ES 2.0 application, and I find myself being CPU bound. After googling, I've found this, which suggest to use a thread for updating objects, and a thread for ...
0
votes
1answer
3k views

How To Scale Canvas In Android

I am writing a android game using Canvas as the way to draw everything, the problem is that when i run it on different android phones the canvas dosn't change size i tried using canvas.scale() but ...
0
votes
1answer
241 views

Android - Rendering HUD View to SurfaceView

I have developed a relatively simple game in android, to get my head around it all, and on the back of it developed a crude game engine (in the loosest sense!). I use a SurfaceView and canvas (no ...
7
votes
3answers
1k views

Is a separate thread for game loop compulsory for simple games?

I am new to game development. In order to learn I am recreating this game on android platform. You can observe the game-play video at the above link. It is a simple game. I have read a lot of ...
10
votes
5answers
1k views

2D collision detection

Let's assume I'm using this character. How would you implement collision detection for it? Using a bounding box doesn't seem to be a good approximation, because the bird's shape is nowhere near a ...
11
votes
2answers
1k views

How do some mobile games scale graphics so beautifully? [duplicate]

I'm working on my first Android game and have been struggling a bit with scaling. I've got 3 test devices 800x480, 1920x1080 and a 2560x1600 tablet. Some games look near perfect on all of them - many ...
1
vote
1answer
96 views

Pixel Perfect collision detection on rotated bitmaps [duplicate]

I have two bitmaps which are being drawn onto a canvas using a matrix canvas.drawBitmap(bitmap, matrix, paint); first to work out if I need to check for a collision i am using eucilidean vectors ...
0
votes
1answer
96 views

How to accurately count 1 second within my logic update?

I have the following method: long time = system.nanoTime(); public void count(){ if (System.nanoTime() > (time+1000000000)){ //Output something or perform action here ...
0
votes
1answer
23 views

Actors (Label) not being drawn to stage [closed]

I have a weird issue that when I try to draw a Stage with only an Actor, a Label to be more precise, added to it and nothing seems to be getting drawn. This is how my setup goes: I have a Sprite ...
0
votes
1answer
95 views

Is this the correct way to detect ray-sphere intersection?

I have this java function that should return a true or false for any sphere passed to it if they intersect. However it seems to end being true a lot of the time when it shouldn't and false sometimes ...
1
vote
1answer
82 views

What are the advantage/disadvantage of publishing a game as Chrome App over Android app?

I have a 2D game on my mind that I wanted to develop. Though I am quite familiar with using Javascript, CSS3 and aware of HTML5's canvas, I am also aware of Chrome App and its ability to work offline. ...
0
votes
1answer
67 views

Andengine Rotate Wheel with fast acceleration

I have a Wheel sprite and i am rotating it using Physics RevoluteJointDef. Its rotating. But problem is how i can make wheel to start moving fast. It took the speed after sometime like real. // ...
2
votes
2answers
228 views

Poor mobile performance when running from Eclipse

So after weeks of thinking my rendering code was bad, I accidentally discovered the following: Running my game on a Nexus S From Eclipse (Debug as -> Android application): 12fps From the device ...
0
votes
1answer
60 views

Run menu in gameloop or as activity?

Currently I am running my menu (with buttons "new game" and "choose level") as an xml view of an activity, that then starts my gameactivity with custom view run on a gameloop. But Im starting to see ...
0
votes
1answer
92 views

Mismatch cordinate system of unity and android

I am new to unity3d, Right now i am adding a cube as game object with coordinate 0,0,0 But when i run it on android device Iam facing 2 problem a) Coordinate system of unity3d are different from ...
0
votes
0answers
92 views

glsl fragment shader work diffrently on different devices

i'm making a 2d android game where i have a mechanics that allow the player to move the camera away from the main character, and to not allow him to explore the hole world, a have create a Fog shader, ...
0
votes
0answers
19 views

Register Modifier to Parent Entity

As far as I know, with Andengine if you register a modifier to a parent, all the children will also be affected by the modifier. If I am wrong please let me know. I'm currently working on a game and I ...
0
votes
0answers
24 views

Unity3d: Lines in Android build

I have a directional light pointing at the 3d objects. For some reasons, when I build to Android, the lighting produces multiple horizontal lines. It does not happen in other builds such as the ...
0
votes
3answers
347 views

Android : glowing/pulsing line/triangle

I would like to create a simple Android app using Opengl ES 2.0 that is showing a simple shape (like line or triangle) that is glowing and pulsing like Nexus X logo in this video : ...
0
votes
1answer
31 views

Android Jump&Run - Random map generation [closed]

I'm pretty new to game development but I work on an android app. It's a 2D Jump and Run game. I do it in Eclipse and the map is readed out of a txt file right now. But I want to do a Jump and run ...
1
vote
1answer
86 views

Change game from portrait to landscape dynamically

I have multiple classes that implement Screen. I want to, say, have the Main Menu screen portrait, then the Play Screen landscape. Is there anyway of changing the orientation dynamically? I thought ...
0
votes
2answers
224 views

How do I make a background fill the whole screen in Libgdx?

I'm using this code to set a 800x420 image to be full screen: public void show() { float w = Gdx.graphics.getWidth(); float h = Gdx.graphics.getHeight(); camera = new ...
1
vote
1answer
95 views

How should I implement a Game Over menu in Android?

By Game Over menu, I mean a menu displayed when you die, with an option to play again. I have two approaches in mind: Use OpenGL Have some button textures ready. When the character dies, draw ...
2
votes
2answers
595 views

Change the scale-policy of OpenGL ES in Android?

I currently develop a game for Android in OpenGL ES 1.0, use libgdx library. I target the 720x480 screen size. For example, I design only one arts pack for 720x480. And what will happen in Android ...
2
votes
2answers
120 views

How can I create delays for sprite animations that work correctly when the application is killed and restored?

Please see my original question here: How should I use system time to compute delay times without stutters? In summary, I am attempting to to introduce a delay (say of 5 seconds or so) before a ...
1
vote
2answers
116 views

Circular dependency when creating entities

I have the following problem: I have a a class called Stage, that keeps an list of entities, which it iterates over every update loop, and updates them. One of these entities might be a weapon (PEW ...
0
votes
2answers
159 views

Using System Time to compute delay times that correctly deal with app pauses?

In my Android app I have the requirement to introduce small (for slowing down animation) and larger delays (for the purpose of delaying the appearance of a character for example). I've experimented ...
1
vote
0answers
65 views

Spin wheel with gesture in Andengine

I want to implement Fortune wheel in Andengine. The wheel would start spinning based on the speed of a finger fling. Then it would stop slowly like real Fortune wheel. What I am able to do now is to ...
5
votes
5answers
4k views

Why do I get this file loading exception when trying to draw sprites with libgdx?

I'm having trouble with the "Drawing Images" section on the libgdx tutorial. I set up the documents completely and I typed the code as follows: public class Game implements ApplicationListener { ...
0
votes
2answers
943 views

Using LibGDX within Android Fragment

I want to use LibGDX with Android, but instead of modifying my Activity to extend AndroidApplication I want my to render my graphics inside Android Fragment The problem is that my class ...
0
votes
0answers
71 views

Using Parcelable in Android to save an object to a Bundle

I'm attempting to ascertain the best method of saving the state of everything in my game for those cases when the app is sent to the background, so, for instance.... • User has pressed the 'Home' key ...
0
votes
0answers
66 views

Async Task for splash screen in OpenGL project

I'm confused over the application of an asyncTask for a simple Android splashscreen. I'm talking specifically about within an OpenGL game. Because of the nature of OpenGL, 2 things spring to mind ...
1
vote
0answers
475 views

LibGDX RPG walking animation [closed]

I've been trying to nail down a walking animation with libGDX. I'm making an RPG with the character that can move up, down, left, and right. I have this movement in a spritesheet. I've been ...
0
votes
2answers
149 views

LibGDX Android version

I am trying to use the LibGDX UI Project creator to create LibGDX projects, but it doesn't allow me to choose the Andorid version for the project. This is a problem for some android features. For ...
1
vote
5answers
137 views

How to reduce a rectangle without problems?

I'm developing an asteroids' game and I'm needing to reduce the rectangle of the spacecraft because when I use the method intersect() of Rect class to detect a collision with an asteroid they are far. ...
3
votes
2answers
257 views

How can I access bitmaps created in another activity?

I am currently loading my game bitmaps when the user presses 'start' in my animated splash screen activity (the first / launch activity) and the app progresses from my this activity to the main game ...
0
votes
2answers
185 views

Should I use a engine when building a snake game? [closed]

I'm new to game development, and want to build a snake game for Android (Maybe also iOS). I've made several apps for Android and have a pretty good experience with Java. The question is, do I need to ...
1
vote
1answer
117 views

Viewport Pixels trouble - Intel XDK

I'm creating a game in Intel XDK, and using their API to get the viewport width and height. These are coming back at 1122 pixels and 746 pixels, respectively. When adding my text at 150 pixels down ...
0
votes
1answer
172 views

How do I implement swipe-to-throw in Andengine?

I have a ball sprite and I apply physics to it when the user swipes on it. I'd like the ball to start moving in the direction of the swipe, similarly to how Paper Toss works. How can I do this?
-2
votes
1answer
117 views

How should I start with Android development? I am basically a PHP HTML JAVASCRIPT developer [closed]

I am a PHP developer wanting to learn Android game programming. I tried java with ADT and android SDK, but I found Java confusing because of its complex Object-Oriented structure. I've heard we can ...
1
vote
1answer
107 views

Android Object get Jagged at the border

I am new to OpenGL ES 1 in android. My 3D Model border getting Jagged. Please help me to look like a smooth border instead of jagged. Screenshot : http://i.stack.imgur.com/1Gq83.png private class ...