B4A Library libGDX - Game Engine

Informatix · Sep 12, 2013

One of the best game engines for Android is now available to B4A users. Unleash your creativity!

You can read a description of this library in this guide.

Download for B4A v10.60 and older (4 MB)
Download for B4A v10.70 and newer (4 MB)

Starting from version 1.13, the library is compiled with Java 8, and thus requires a recent version of B4A and Java 8+.
To install the library, copy the .jar file and the .xml file in your libraries folder.

This library is not compatible with the Debug mode. Ensure that you always compile in Release mode.

Download also the examples and templates.

You can reduce the weight of the library if you want to keep your APK file as small as possible. Read this post to learn how to create your Lite version.

Tutorials:
How to make games
Introduction to the libGDX library
PacDroid: from scratch to fun
Shaders

Take also a look at the Cloney Bird tutorial by andymc.

Plugins:
Box2DLights
SpecialFX

Versions:

v1.14:
- I fixed a bug when Looping was changed during the execution of a sound;
- I added the RenderImageLayerAt function to all map renderers;
- I added the support of the new packaging tool used by B4A v10.70 (this mainly fixes the problem of / in paths of internal assets);
- I updated the manifest of all examples.

v1.13:
- I fixed a bug when the device was rotated (the Timer thread, for example, was not disposed which caused a problem in lgGestureDetector);
- I added two functions for Tiled maps: renderImageLayerAt and renderTileLayerAt.

v1.12:
- I added the .so libraries for 64 bits CPU;
- I added the PinchStop event to lgGestureDetector;
- I added the Orientation property to lgBox2DTransform;
- I fixed minor bugs.

v1.11:
- I fixed several bugs;
- I removed the unwanted delay after a change of screen in the Render event;
- I added the lgAsyncExecutor and lgAsyncTask classes;
- I added the missing file for the Progression demo;
- I updated the Freetype library (.so).

v1.10:
- I fixed several bugs;
- I added the support of expansion files: classes lgZipResourceFile and lgZipEntry, functions lgFiles.SetAPKExpansion and lgFiles.ExpansionFile (untested);
- I added a HashCode function to all lg...Array classes;
- I added a dozen of predefined colors to lgColor;
- I added the "raw_y" property to lgMapObjects;
- I added the grow, growX and growY functions to lgScn2DTableCell;
- I added the lerpAngle and lerpAngleDeg functions to lgMathUtils;
- I improved Atan2 in lgMathUtils;
- the collision objects of TMX tiles are now accessible via the Objects property of lgMapAnimatedTiledMapTile and lgMapStaticTiledMapTile;
- I added two new examples: Progression and Map_Box2D;
- I updated the manifest of most examples and templates.

v1.09:
- I fixed bugs, notably a major bug that crashed sometimes the game in the Render event handler when the current screen is changed;
- I added getColumnWidth and getRowHeight to lgScn2DTable and all classes that inherit from lgScn2DTable;
- I added the defaults function to lgScn2DTableCell;
- TMX files are loaded faster.

1.08:
- I fixed bugs;
- I added the lgFontGeneratorParameters class;
- I added CreateFontWithParam to lgFontGenerator;
- lgFontGenerator can add now a border and a shadow to the generated fonts (via CreateFontWithParam);
- I added Initialize2, LabelAlign and LineAlign to lgScn2DLabel;
- I added SetStateWithoutEvent to lgScn2DButton and lgScn2DTextButton;
- I added TitleLabel and TitleTable to lgScn2DWindow (this deprecates ButtonTable, Title, TitleWidth and TitleAlignment);
- I added getIndex to lgMapLayers and lgMapObjects;
- I added Target to actions of Scene2D;
- I removed Print from lgScn2DGroup (use Log(myGroup) instead);
- lgMapTiledMapImageLayer uses now float values for position;
- lgNinePatch uses now float values for paddings;
- lgPixmapPacker and lgPixmapPackerPage were rewritten (the many changes will break your existing code).

1.07:
- I fixed a few bugs, as usual;
- I added InitializeTransparentView to LibGDX;
- I added the lgKTXTextureData class to support the KTX and ZKTX file formats;
- I added a new demo: Format_KTX;
- I added argb8888 and argb8888ToColor to lgColor
- I added the lgMapAtlasTmxMapLoaderParameters class;
- I added Initialize3 and Load2 to lgMapAtlasTmxMapLoader;
- I added LoadExternal and IsInitialized to lgMapTmxMapLoader;
- I added FrameTiles to lgMapAnimatedTiledMapTile;
- I added a Tag property to lgSprite;
- I added hasOppositeDirection, hasSameDirection, isCollinear, isOnLine, isPerpendicular, AngleRad and rotateRad to lgMathVector2;
- I added rotateRad to lgMathMatrix4;
- I added clamp4, log, log2, Randomize, randomInt, randomInt2, randomSign, randomTriangular and randomTriangular2 to lgMathUtils;
- the random number generator of lgMathUtils uses now the xorshift128+ algorithm;
- I renamed Create2 to Combine in lgMesh;
- I removed the Create and Create3 functions from lgMesh;
- I removed the deprecated Color property from lgVertexAttributesUsage;
- it is possible now to change the KeyFrames array of lgAnimation after its initialization.

v1.06:
- I fixed a few bugs;
- I added a Texture property to lgSprite;
- I added the MotorJoint type to lgBox2DWorld;
- I added GetFixture to lgBox2DBody;
- I added Initialize3 to lgShapeRenderer to allow the use of custom shader programs;
- I added ScaleEffect to lgParticleEffect;
- I added CleanUpBlendFunction to lgParticleEmitter;
- I added scl2 to lgMathVector2;
- I added IsEnabled to lgGLProfiler;
- I added Percent, VisualPercent and VisualInterpolation to lgScn2DProgressBar;
- I added Percent, VisualPercent, VisualInterpolation and VisualInterpolationInverse to lgScn2DSlider;
- I added isLeftEdge, isRightEdge, isTopEdge, isBottomEdge to lgScn2DScrollPane;
- The Reset function of lgScn2DTableCell sets now all constraints to their default values;
- I modified the Map_Hexagonal example to display the coordinates of the touched hex.

v1.05:
- I fixed two bugs;
- the latest TMX format of Tiled Map Editor is now properly decoded (with support of animated tiles and image layers);
- I added the RenderImageLayer function to the map renderers;
- I added the lgMapTiledMapImageLayer class for the image layer of tiled maps;
- I added the OffsetX and OffsetY properties to lgMapAnimatedTiledMapTile and lgMapStaticTiledMapTile;
- I added the CurrentFrame and CurrentFrameIndex properties to lgMapAnimatedTiledMapTile;
- I added the FinishLoadingAsset function to lgAssetManager;
- I added the SetAlpha function to lgBitmapFontCache;
- I added FixtureCount and GetAllFixtures to lgBox2DWorld;
- I added the ResetOnTouchUp property to lgTouchpad;
- I removed Scale and Div from lgMathVector3 because these functions were deprecated.

v1.04:
- I fixed various bugs, notably a bug affecting the Backspace key on the virtual keyboard of some devices;
- I added the missing OpenGL functions in lgGL;
- I added the KeepWithinStage function to lgDragAndDrop;
- I added the dampingRatio and frequencyHz fields to lgBox2DWeldJointDef;
- I added the DampingRatio and Frequency properties to lgBox2DWeldJoint;
- I added the Line6 function to lgShapeRenderer;
- I added VisualScrollPercentX, VisualScrollPercentY and FlickScrollTapSquareSize to lgScn2DScrollPane;
- the LineHeight property of BitmapFonts can be modified;
- I updated the .so files;
- I added an example: Sensors.

v1.03:
- I fixed various bugs;
- I added the VertexColor property to lgPolygonSprite;
- I added the Equals function to lgArray;
- I renamed Ellipse to Ellipsis in lgScn2DLabel;
- I improved the code of lgPixmapIO (less memory used, PNG with compression);
- I fixed a problem with the fragment shaders of two examples.

v1.02:
- I fixed 3 bugs in lgScn2dTable and a few others in other classes;
- I added 4 examples using shaders;
- I removed the lgDefaultGroupStrategy class because it was useless and changed the initialization of lgDecal objects;
- I added the SetRotation function to lgDecal;
- I added the Tint function to lgBitmapFontCache;
- I added the Cancel and Reset functions to lgGestureDetector;
- I added the IsKeyJustPressed function to lgInput;
- I added the Colinear and EnsureCCW functions to lgMathGeometryUtils;
- I added the Equals function to lgMathGridPoint2, lgMathGridPoint3 and lgMathRay;
- I added the IntersectRayRay and DistanceLinePoint2 functions to lgMathIntersector;
- I added the Extract4x3Matrix function to lgMathMatrix4;
- I added the WindowSize property to lgMathWindowedMean;
- I added the IsDrawing function to lgShapeRenderer;
- I added the ColorUnpacked field to lgVertexAttributesUsage;
- I added the Clear function to lgScn2DButtonGroup;
- I added the CancelTouchFocus property to lgScn2DDragAndDrop;
- I added the Rows, Columns, BackgroundTop, BackgroundLeft, BackgroundBottom, and BackgroundRight properties to lgScn2DTable;
- I added the ClearActor function to lgScn2dTableCell;
- I added the ActionsRequestRendering property to lgScn2DStage;
- I renamed CancelTouchFocus2 to CancelTouchFocusExcept in lgScn2DStage;
- I removed the Clear function from lgScn2dTableCell;
- The color markups are now supported by lgScn2dLabel and lgScn2dWindow (title).

v1.01:
- I fixed a handful of minor bugs and a big bug affecting the screen events;
- I added IsDrawing in lgSpriteBatch.

v1.0:
- I fixed bugs in various classes;
- I rewrote big chunks of internal graphics classes;
- the TMX map loaders are now able to read the Rotation property;
- the FrameDuration property of lgAnimation can now be changed during the animation;
- I added an Initialize function to lgMapAnimatedTiledMapTile to be able to set dynamically an animated tile;
- I added two new classes for debugging: lgGLProfiler and lgScn2DDebugRenderer;
- I added DebuggingEnabled and DebugColor to all actors of Scene2D;
- I added ChildrenDebuggingEnabled to all groups of Scene2D;
- I added CellDebugColor to lgScn2DTable and removed all its debug functions;
- I added SetCenterPosition, CenterX and CenterY to all actors of Scene2D;
- I replaced the Widget word by Actor in lgScn2DTableCell;
- I added the Equals and HashCode functions to a few lgMath classes;
- I added the ApproxLength function to lgMathBezier, lgMathBSpline and lgMathCatmullRomSpline;
- I added Set3, SetPosition2, Contains2, Circumference and Area to lgMathCircle;
- I added Set3, SetPosition2, Circumference and Area to lgMathEllipse;
- I added Merge2, Area and Perimeter to lgMathRectangle;
- I added Len and Len2 to lgMathSegment;
- I added Volume and SurfaceArea to lgMathSphere;
- I added Interpolate to lgMathVector2 and lgMathVector3;
- I added the following functions to lgMathMatrix4: mulLeft, Set2, Set3, Set4, Set5, Set6, ScaleX, ScaleY, ScaleZ, ScaleXSquared, ScaleYSquared, ScaleZSquared;
- I added a LoadMipMap event and replaced UseHardwareMipMap by Get/SetGenerationMethod in lgMipMapGenerator;
- Box2D has now its own .so library;
- I added Separations to lgBox2DWorldManifold;
- I added the following functions to lgBox2DEdgeShape: Vertex0, SetVertex0, SetVertex0_xy, HasVertex0, Vertex3, SetVertex3, SetVertex3_xy, HasVertex3;
- I added LocalAxisA to lgBox2DPrismaticJoint;
- I added two new classes to Box2D: lgBox2DMotorJoint and lgBox2DMotorJointDef;
- I added the LoadTextureWithParam function to lgAssetManager and the related lgTextureLoaderParam class;
- I added two new properties (Normalized, Type) and a function (HashCode) to lgVertexAttribute;
- I renamed Color to ColorPacked in lgVertexAttribute;
- I renamed Loop to Repeat in lgSound;
- I renamed consumeCompressedData to consumeCustomData in all TextureData classes;
- I protected some important classes against a repeated initialization to avoid memory leaks and side effects;
- I added a Scene2D_EventsHierarchy demo and modified the following examples: BitmapFont, FrameBuffer, Map_tIDE and Scene2D_Table.

v0.99:
- I fixed numerous bugs, especially in Scene2D where the listeners did not work as expected and actors were not fully re-initialized when Initialize was called again;
- I set to Null the internal objects of classes after a call to Dispose;
- I added the following functions:

+ IsInitialized where it was still missing;
+ Move to lgArray;
+ ComputeScaleForPixelHeight to lgBitmapFont;
+ SetNameForColor, GetColorByName and SetAlpha to lgColor;
+ Clear to lgMapLayers;
+ Lerp to lgMathUtils;
+ Load3 and LoadEmitterImages3 to lgParticleEffect;
+ SetString to lgScn2DLabel;
+ Initialize4 to lgScn2DSpriteDrawable, lgScn2DTextureRegionDrawable and lgScn2DTiledDrawable;
+ UpdateMatrices to lgShapeRenderer;
+ SetCenterX, SetCenterY and SetCenter to lgSprite;
- I added a ChildrenCount property to lgScn2DGroup;
- I added a Draw event to lgScn2DImage and lgScn2DLabel;
- I added a Disabled property to lgScn2DScrollPane;
- I added the following predefined colors to lgColor: Olive, Purple, Maroon, Teal, Navy;
- I renamed the alpha function to to255 in lgColor;
- lgBitmapFont and lgBitmapFontCache now support in-string colored text through a simple markup language (see the demo);
- I added the MarkupEnabled property to lgBitmapFont;
- I added a BitmapFont demo;
- I modified the FrameBuffer demo;
- I removed the yUp and yDown parameters from the tiled map loaders and renderers (yUp is now always true);
- I removed Rotation and rotateBy from lgScn2DLabel, lgScn2DList, lgScn2DSelectBox and lgScn2DTouchpad because they were not effective.

v0.98:
- I fixed a bug affecting the scaling and rotation of lgScn2DImage;
- I fixed a bug in lgBox2DParticleEmitter;
- I fixed a bug in lgScn2DButton;
- I added the lgFrameBuffer class and a FrameBuffer demo;
- I added the IsInitialized function where it was missing;
- I added the PolygonRegion type to lgAssetManager;
- I added a Payload parameter to the SrcDragStop event of lgScn2DDragAndDrop;
- I added the Draw2 function to lgScn2DSpriteDrawable;
- I added the Set3 function to lgMathMatrix3.

v0.97:
- I fixed a few bugs (the immersive mode works now as expected);
- I found a solution for the repetition of tiles, so I added two properties (RepeatX, RepeatY) to lgMapTiledMapLayer and I modified the Map demos.
- I added an IsInitialized function to 15 classes;
- I added a RemoveRange function to all the lgArray classes;
- I added the Fling function to lgScn2DScrollPane;
- I added the IsVisualPressed function and the VisualPressedDuration property to lgScn2DClickListener.

v0.96: Major update!
In this version, I:
- removed all the code supporting OpenGL ES 1.x
- fixed a few bugs
- added new classes for decals (2D objects in 3D space): lgDecal, lgDecalBatch, lgCameraGroupStrategy, lgDefaultGroupStrategy, lgSimpleOrthoGroupStrategy
- added an example for decals
- removed the Mesh example as it cannot work with OpenGL 2 without being rewritten
- added the lgScn2DProgressBar class and modified the Scene2D_TextFieldsAndSliders example to show how to use it
- added the IsInitialized function to a dozen of classes
- added these functions:
lgBox2DWheelJoint: isMotorEnabled
lgFontGenerator: CreateFont5, CreateFont6 (for mip maps and filters)
lgMathGeometryUtils: polygonArea, triangleArea
lgMathMatrix3: getScale, getTranslation, setToRotation2, setToRotation3, setToRotationRad, rotateRad
lgMathMatrix4: det3x3, setToRotationRad, setTranslation
lgMathUtils: isEqual, isEqual2, isZero, isZero2
lgMesh: CalculateRadius, CalculateRadius2, CalculateRadiusSquared
lgScn2DDragAndDrop: SetTouchOffset
lgSprite: SetOriginCenter
- added these properties:
lgBox2DJoint: CollideConnected
lgBox2DDistanceJoint, lgBox2DFrictionJoint, lgBox2DRopeJoint, lgBox2DWeldJoint: LocalAnchorA, LocalAnchorB
lgBox2DGearJoint: Joint1, Joint2
lgBox2DPrismaticJoint: LocalAnchorA, LocalAnchorB, MaxMotorForce, ReferenceAngle
lgBox2DWheelJoint: LocalAnchorA, LocalAnchorB, LocalAxisA
lgMathMatrix3: Rotation, RotationRad
lgScn2DActor: isTouchable
lgScn2DScrollPane: ScrollHeight, ScrollWidth, VariableSizeKnobs
lgScn2DWindow: ButtonTable, Resizable, ResizeBorder, TitleWidth
- renamed the functions Translate -> MoveBy, Rotate -> RotateBy and Size -> SizeBy of the lgScn2DActor class
- removed toScreenCoordinates from lgStage and toWindowCoordinates from lgScissorStack
- removed the yDown parameter from ComputePolygon and ComputePolygon2 in the lgMathConvexHull class
- improved a bit the help text of a few functions

v0.95:
Bugfixes and minor improvements
New classes: lgFloatArray, lgIntArray, lgShortArray
The lgMathConvexHull and lgMathEarClippingTriangulator classes are now usable
New functions:
- lgPerspectiveCamera: GetPickRay
- lgScn2DStage: SetViewport2
- lgMathFrustum: pointInFrustum2, sphereInFrustum2, sphereInFrustumWithoutNearFar2
- lgBox2DChainShape: createLoop2
- lgMathIntersector: intersectSegments2
- lgMathVector2: isUnit, isUnit2, isZero, isZero2
- lgMathVector3: set2, isUnit2, isZero2
New configuration setting: useImmersiveMode (for Kitkat)

v0.94:
Bugfixes (including a serious bug with the listeners of Scene2D)
New classes: lgMapTmxMapLoaderParameters and lgMipMapGenerator
New functions:
- lgAnimation: KeyFrames
- lgAssetManager: LoadTMXWithParam
- lgBitmapFontCache: SetColors, SetColors2, SetColorsRGBA
- lgGestureDetector: Initialize2
- lgMapTmxMapLoader: Initialize3, Load2
- lgMathVector2: Rotate90
- lgMesh: UpdateVertices, UpdateVertices2
- lgMusic: Duration, Position
- lgScn2DClickListener: inTapSquare2
- lgScn2DList: ItemHeight
- lgShapeRenderer: RectLine
- lgSocket: RemoteAddress
- lgSprite: Alpha, SetFlip
New parameters: ListBox and ScrollPane styles in lgScn2DSelectBoxStyle.Initialize
New example: Filters
Modified example: Map_tIDE (I fixed the visual issues)
New configuration setting: disableAudio

v0.93:
Bugfixes (including the problem reported for the Get...List functions of Box2D)
Class rewritten: lgTexture (some functions have been added, some have been removed)
New configuration setting: useGLSurfaceViewAPI18 (for Gingerbread and older versions)
New functions: lgFileHandle.equals, lgFileHandle.hashCode, lgShapeRenderer.Triangle2
New class: lgPerspectiveCamera (for 3D)
New example: ShapeRenderer
Modified example: Perf_Skaters (the background scrolls endlessly now)

0.92:
Minor bugfixes
Internal changes for texture handling
Viewport parameters added to CalculateScissors in lgScissorStack
New function in lgScn2DScrollPane: setScrollBarPositions
New function in lgMathVector2: epsilonEquals2
New function in lgMathIntersector: intersectRectangles
Initialize3 and FindDirectionForIsoView functions removed from lgOrthographicCamera

0.91:
Bugfixes (including the problem reported for tIDE properties)
New event for gesture detector: PanStop
New Initialize function for Bitmapfont to allow to flip the font
New Rect functions for the ShapeRenderer
New class: lgMapIsometricStaggeredMapRenderer (for staggered isometric maps)
New function for lgScn2dScrollPane: Cancel
lgMathBezier and lgMathBresenham2 are now fully usable
New functions in lgMathIntersector
A few internal changes to improve performance and stability

0.9:
Bugfixes
New class: lgArray (ordered array with an initial capacity)
Many Lists have been replaced by lgArray for a better performance and more possibilities
Improved documentation (mainly in lgMath and lgSprite classes)
lgMathBSpline and lgMathCatmullRomSpline are now fully usable
New example: SplinePath
New function for particle effects and particle emitters: BoundingBox
New property for lgScn2DLabel: Ellipse

0.8:
First release

ilan · Jan 2, 2017

hi

is there any plans to wrap "Liquid Fun" (an extension of Box2D) ??

http://google.github.io/liquidfun/

thank you, ilan

Informatix · Jan 3, 2017

wonder said:
Any way to fix this?

Yes, set the right height in Activity.AddView. Look at threads like this one.

Informatix · Jan 3, 2017

ilan said:
hi

is there any plans to wrap "Liquid Fun" (an extension of Box2D) ??

No.

wonder · Jan 3, 2017

Informatix said:
Yes, set the right height in Activity.AddView. Look at threads like this one.

I managed to fix it. Thanks.

melonZgz · Jan 7, 2017

Hello.
I have a problem with a tmx map with animated tiles.
Using the example provided "map_tIDE", but loading a tmx file (I don't have tide installed...) I see the animated tiles.
But if instead of doing renderer.render I render the layers one by one I don't see the animation:

B4X:

    Camera.Update
    renderer.SetCameraView(Camera)

    renderer.SpriteBatch.Begin
    renderer.renderTileLayer(layer)
    renderer.SpriteBatch.End

This way it renders the layer, but the tiles wich are supposed to have an animation are static in their first frame.
Thank you.

Informatix · Jan 9, 2017

melonZgz said:
Hello.
I have a problem with a tmx map with animated tiles.
Using the example provided "map_tIDE", but loading a tmx file (I don't have tide installed...) I see the animated tiles.
But if instead of doing renderer.render I render the layers one by one I don't see the animation:

B4X:

Camera.Update renderer.SetCameraView(Camera) renderer.SpriteBatch.Begin renderer.renderTileLayer(layer) renderer.SpriteBatch.End

This way it renders the layer, but the tiles wich are supposed to have an animation are static in their first frame.
Thank you.

Use Render2 instead of RenderTileLayer.

melonZgz · Jan 9, 2017

Thx. I'm allready rendering that way. I just wanted to use renderTileLayer to keep all the drawings in the same batch draw (between batch.begin and bach.end) as render and render2 have to be outside the begin-end.

ldhyob · Sep 28, 2017

Informatix, how do you do? LibGDX's B4A library is great! Thank you so much for sharing!

But in the use of found a question need to report to you:

AssetManager seems to be under the high android version can not run normally, such as the android 7.1.1, would collapse, don't know is what reason, please Informatix experts to help solve, thank you!

Informatix · Sep 30, 2017

ldhyob said:
Informatix, how do you do? LibGDX's B4A library is great! Thank you so much for sharing!

But in the use of found a question need to report to you:

AssetManager seems to be under the high android version can not run normally, such as the android 7.1.1, would collapse, don't know is what reason, please Informatix experts to help solve, thank you!

My only mean to test libGDX with Android v7.1 is Genymotion and I see nothing unusual with AssetManager. Could you elaborate? Do you have this issue with the AssetManager demo? Does anyone else have the same problem?

ldhyob · Oct 1, 2017

Informatix said:
My only mean to test libGDX with Android v7.1 is Genymotion and I see nothing unusual with AssetManager. Could you elaborate? Do you have this issue with the AssetManager demo? Does anyone else have the same problem?

Could you please tell me that the version of libGDX library you tested is 1.12? I am using the demo project that you released on the AssetManager demonstration project installed on Android v7.1.1, and the result, a run, will exit after the splash screen.

Informatix · Oct 1, 2017

ldhyob said:
Could you please tell me that the version of libGDX library you tested is 1.12? I am using the demo project that you released on the AssetManager demonstration project installed on Android v7.1.1, and the result, a run, will exit after the splash screen.

Yes it is 1.12.
There's no splash screen in the AssetManager demo.

ldhyob · Oct 2, 2017

Informatix said:
Yes it is 1.12.
There's no splash screen in the AssetManager demo.

I made a few modifications to the demo project, and found that the resource loading in LG_Create event was no problem after the test run, but it was found that there was a problem of reading resources in LG_Render event. I will show the relevant screenshots, please give an analysis to the teacher of Informatix.

Informatix · Oct 2, 2017

ldhyob said:
I made a few modifications to the demo project, and found that the resource loading in LG_Create event was no problem after the test run, but it was found that there was a problem of reading resources in LG_Render event. I will show the relevant screenshots, please give an analysis to the teacher of Informatix.View attachment 60178 View attachment 60179

You put the image to load in the loading queue, but you don't load it with Update, so the result is normal.

wonder · May 12, 2019

Hi!!

There seems to be a problem with the Gesture Detector after device rotation.
The LongPress event doesn't register anymore...

For testing, I added this line to the template (attached):

B4X:

Sub GD_LongPress(X As Float, Y As Float) As Boolean
    Log(DateTime.Time(DateTime.Now) & " GD_LongPress")
    Return False
End Sub

Could you please have a look? Many thanks in advance.

Informatix · May 16, 2019

It is very rare for a game to accept two different orientations of the device so I have never controlled this behavior. It seems to be a bug and I don't have any workarounds to propose at the moment.

wonder · May 24, 2019

Hello again!

I don't want to duplicate my thread in the questions sub-forum, but I'd still like to ask it here...

With regards to the CatMullRomSpline class, I would like to access the "derivativeAt" method. Is it doable with reflection and/or inline JAVA?

https://libgdx.badlogicgames.com/ci/nightlies/docs/api/com/badlogic/gdx/math/CatmullRomSpline.html

I'm looking forward into implementing the solution for this problem:
https://stackoverflow.com/questions/32665262/libgdx-path-catmullromspline-constant-speed

SOLVED: https://www.b4x.com/android/forum/threads/reflection-and-template-argument.106102/#post-664183

Informatix · Jul 18, 2019

wonder said:
Hi!!

There seems to be a problem with the Gesture Detector after device rotation.
The LongPress event doesn't register anymore...

For testing, I added this line to the template (attached):

B4X:

Sub GD_LongPress(X As Float, Y As Float) As Boolean Log(DateTime.Time(DateTime.Now) & " GD_LongPress") Return False End Sub

Could you please have a look? Many thanks in advance.

This bug is fixed in the new version. There was a bug with objects (the Timer thread in this case) not disposed when the device is rotated.

wonder · Jul 18, 2019

Informatix said:
This bug is fixed in the new version. There was a bug with objects (the Timer thread in this case) not disposed when the device is rotated.

Thank you so much Fred!!! I'll try the latest version as soon as I can!

Spright · Feb 7, 2024

While creating a game using B4A and Libgdx Library, we faced a serious issue: the app crashes on newer phones when
using the recent button to exit. This problem is consistent even in basic library demos.
The error message "Waiting for pause synchronization took too long; assuming deadlock and killing" appears when using the
recent button in the navigation bar to exit the app.

The last known version that worked without any problems was Android API 28, but on newer versions around API 33, it breaks down.
The back and home buttons remain unaffected. You can even use the recent button to return to the app without any issue, but not leave the app using it.

As we would love to continue developing this game on B4A, there is now a bounty for anyone who can fix this.
https://www.b4x.com/android/forum/threads/bounty-update-libgdx-add-on-for-b4a.159003/

This thread discusses the Libgdx library, with apparent additional problems reported on certain models.
https://www.b4x.com/android/forum/threads/crashing-resume.158975/

walterf25 · Feb 14, 2024

Spright said:
While creating a game using B4A and Libgdx Library, we faced a serious issue: the app crashes on newer phones when
using the recent button to exit. This problem is consistent even in basic library demos.
The error message "Waiting for pause synchronization took too long; assuming deadlock and killing" appears when using the
recent button in the navigation bar to exit the app.

The last known version that worked without any problems was Android API 28, but on newer versions around API 33, it breaks down.
The back and home buttons remain unaffected. You can even use the recent button to return to the app without any issue, but not leave the app using it.

As we would love to continue developing this game on B4A, there is now a bounty for anyone who can fix this.
https://www.b4x.com/android/forum/threads/bounty-update-libgdx-add-on-for-b4a.159003/

This thread discusses the Libgdx library, with apparent additional problems reported on certain models.
https://www.b4x.com/android/forum/threads/crashing-resume.158975/

See my response and fix on the Job forum thread.

B4A Library libGDX - Game Engine

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