Xcode build working BUT Android Studio build not working as expected

(I am new to Cocos2dx)
(Xcode with macOS, Android studio with Galaxy Note5)
macOS = Version 10.15.6
Xcode = Version 11.6
Android Studio = Version 4.0.1
Phone (Galaxy Note5) = samsung sm-n920k

I am making a stopwatch similar to https://cstimer.net.
The stopwatch is a cocos2d::Label* stopWatchLabel;
I am using the void update(float dt); function to update the stopwatch(Label) using the setString(); function.
It seems to work on Xcode. (Image below) (It is running)

But it doesn’t seem to work on Android Studio. As soon as I start the stopwatch, the program crashes. I think it’s because of the setString(); function. But I am not sure, and I can’t fix it.
How can I fix this code to make the stopwatch on Android?


#include "HelloWorldScene.h"
#include "ui/CocosGUI.h"

#include <iostream>


Scene* HelloWorld::createScene()
    auto scene = HelloWorld::create();
    auto layer = Layer::create();
    return scene;

// Print useful error message instead of segfaulting when files are not there.
static void problemLoading(const char* filename)
    printf("Error while loading: %s\n", filename);
    printf("Depending on how you compiled you might have to add 'Resources/' in front of filenames in HelloWorldScene.cpp\n");

// on "init" you need to initialize your instance
bool HelloWorld::init()
    // 1. super init first
    if ( !Scene::init() )
        return false;

    auto visibleSize = Director::getInstance()->getVisibleSize();
    Vec2 origin = Director::getInstance()->getVisibleOrigin();

    // 3. add your codes below...
    // colors for stopWatchLabel
    WHITE_4B = Color4B(255, 255, 255, 255);
    PINK_4B = Color4B(255, 0, 126, 255);
    GREEN_4B = Color4B(0, 255, 126, 255);
    stopWatchLabel = Label::createWithTTF("0.0->", "fonts/FiraCode-Regular.ttf", 96);
    stopWatchLabel->setPosition(Vec2(visibleSize.width/2+origin.x, visibleSize.height/2-100+origin.y));
    this->addChild(stopWatchLabel, 1);
    stopWatchBase = 0;
    stopWatchCheck = 0; // 0: stopped, 1: started, 2: anti ovelap int usage, 3: stop with color
    touchDurationCheck = 0; // 0, 1->
    touchDurationBase = 0.0;
    holdStopWatch = 0.55;
    listener1 = EventListenerTouchOneByOne::create();

    listener1->onTouchBegan = [=](Touch* touch, Event* event){
        if (stopWatchCheck == 0)
            stopWatchBase = 0;
            touchDurationCheck = 1;
        else if (stopWatchCheck == 1)
            stopWatchCheck = 0;
        return true;
    listener1->onTouchMoved = [=](Touch* touch, Event* event){
    listener1->onTouchEnded = [=](Touch* touch, Event* event){
        if (stopWatchCheck == 2)
            stopWatchCheck = 1;
        touchDurationCheck = 0;
        touchDurationBase = 0;
    _eventDispatcher->addEventListenerWithSceneGraphPriority(listener1, this);
    return true;
void HelloWorld::update(float dt)
    // stopWatchCheck to these
    if (stopWatchCheck == 1)
        stopWatchBase += dt;
    // touchDurationCheck
    if (touchDurationCheck == 1)
        touchDurationBase += dt;
    if (touchDurationBase > holdStopWatch && listener1->onTouchBegan)
        stopWatchLabel->setString(std::to_string(stopWatchBase)); // if thing
        stopWatchLabel->setTextColor(GREEN_4B); // if thing
        stopWatchCheck = 2; // if thing



#include "cocos2d.h"

class HelloWorld : public cocos2d::Scene
    static cocos2d::Scene* createScene();

    virtual bool init();
    // a selector callback
    void menuCloseCallback(cocos2d::Ref* pSender);
    // implement the "static create()" method manually
    void update(float dt); // update function
    float stopWatchBase; // stopwatch base number thing
    cocos2d::Label* stopWatchLabel; // label to represent
    int stopWatchCheck;
    cocos2d::EventListenerTouchOneByOne* listener1; // touch listener
    int touchDurationCheck;
    float touchDurationBase; // touch duration
    float holdStopWatch; // hold to start
    cocos2d::Color4B WHITE_4B;
    cocos2d::Color4B PINK_4B;
    cocos2d::Color4B GREEN_4B;

#endif // __HELLOWORLD_SCENE_H__

Why doesn’t it work?

What does the console say when it crashes?

Did you step through using the debugger?

1 Like

This happens when I run it.
When the touch ended.
It’s ok until I run the stopwatch.

From debugging, I think setString(); in the update function is causing this. setString(); has to execute every frame, so it crashes.
But I’m not sure. And if that is the cause of the error, how do I fix it? How do I make setString(); executing every frame not crash? SCREEN RECORDING OF THE PROGRAM CRASHING

One more strange thing.
This, [timer label]->setString(std::to_string([stopwatch])); executes every frame. In theory, it has to update the [timer label] every frame. But it crashes.

It’s funny because when i replace the [stopwatch] value with something else, for example) [timer label]->setString("this is a test"); This code should update the [timer label] to “this is a test” every frame right? Instead, the label just disappears.

I press the debug button in android studio. (I don’t know how to use this, so I will show you a screen recording, and outputs.)
It shows a screen with some functions, but I have no idea about them. SCREEN RECORDING ABOUT DEBUGGING

Starting LLDB server using code injection
Debugger attached to process 16852
Signal: SIGSEGV (signal SIGSEGV: address access protected (fault address: 0x7ef8dd2690))
failed to send the k packet

Process finished with exit code 6
Executing commands in '/Applications/Android Studio.app/Contents/bin/lldb/shared/stl_printers/load_script'.
(lldb) script import sys
(lldb) script import os
(lldb) script gala_available = os.environ.get('AS_GALA_PATH') is not None
(lldb) script exec("if gala_available: sys.path.append(os.environ['AS_GALA_PATH'])")
(lldb) script exec("if gala_available: import gdb")
(lldb) script exec("if gala_available: import gdb.printing")
(lldb) script libstdcxx_printers_available = gala_available and (os.environ.get('AS_LIBSTDCXX_PRINTER_PATH') is not None)
(lldb) script exec("if libstdcxx_printers_available: sys.path.append(os.environ['AS_LIBSTDCXX_PRINTER_PATH'])")
(lldb) script exec("if libstdcxx_printers_available: import printers")
(lldb) script exec("if libstdcxx_printers_available: printers.register_libstdcxx_printers(None)")
(lldb) script exec("if lldb.debugger.GetCategory('libstdc++-v6').IsValid(): lldb.debugger.GetCategory('gnu-libstdc++').SetEnabled(False)")
08/30 19:51:05: Launching 'test' on samsung SM-N920K.
$ adb shell am start -n "com.cshift.test/org.cocos2dx.cpp.AppActivity" -a android.intent.action.MAIN -c android.intent.category.LAUNCHER
Connected to process 10340 on device 'samsung-sm_n920k-0715f7fb24ce2c05'.
Capturing and displaying logcat messages from application. This behavior can be disabled in the "Logcat output" section of the "Debugger" settings page.
D/main: cocos_android_app_init
D/Cocos2dxHelper: isSupportLowLatency:false
D/Cocos2dxHelper: sampleRate: 48000, framesPerBuffer: 240
D/Java_org_cocos2dx_lib_Cocos2dxHelper.cpp: nativeSetAudioDeviceInfo: sampleRate: 48000, bufferSizeInFrames: 240
D/Cocos2dxActivity: onResume()
D/ViewRootImpl@6cbb4f0[AppActivity]: ThreadedRenderer.create() translucent=false
D/InputTransport: Input channel constructed: fd=58
D/ViewRootImpl@6cbb4f0[AppActivity]: setView = DecorView@77d5a69[AppActivity] touchMode=true
D/ViewRootImpl@6cbb4f0[AppActivity]: dispatchAttachedToWindow
D/ViewRootImpl@6cbb4f0[AppActivity]: Relayout returned: oldFrame=[0,0][0,0] newFrame=[0,0][1920,1080] result=0x7 surface={isValid=true 545865963520} surfaceGenerationChanged=true
    mHardwareRenderer.initialize() mSurface={isValid=true 545865963520} hwInitialized=true
D/libEGL: loaded /vendor/lib64/egl/libGLES_mali.so
D/SurfaceView: Relayout returned: oldFrame=[0,0][0,0] newFrame=[0,0][1920,1080] result=0x7 surface={Surface(name=null)/@0x64cd84c isValid=true 545865967104}
I/OpenGLRenderer: Initialized EGL, version 1.4
D/OpenGLRenderer: Swap behavior 1
D/mali_winsys: EGLint new_window_surface(egl_winsys_display*, void*, EGLSurface, EGLConfig, egl_winsys_surface**, egl_color_buffer_format*, EGLBoolean) returns 0x3000,  [1920x1080]-format:1
D/mali_winsys: EGLint new_window_surface(egl_winsys_display*, void*, EGLSurface, EGLConfig, egl_winsys_surface**, egl_color_buffer_format*, EGLBoolean) returns 0x3000,  [1920x1080]-format:1
D/cocos2d-x debug info: {
    	cocos2d.x.version: cocos2d-x-4.0
    	vendor: ARM
    	cocos2d.x.compiled_with_profiler: false
    	max_texture_units: 96
    	cocos2d.x.build_type: DEBUG
    	renderer: Mali-T760
    	cocos2d.x.compiled_with_gl_state_cache: true
    	max_samples_allowed: 0
    	supports_OES_depth24: true
    	version: OpenGL ES 3.2 v1.r15p0-00rel0.5dff6779e3b10548dc5cd2b2f4972566
    	max_vertex_attributes: 16
    	supports_NPOT: true
    	supports_vertex_array_object: true
    	max_texture_size: 8192
    	supports_S3TC: false
    	supports_discard_framebuffer: true
    	supports_ETC1: true
    	supports_OES_map_buffer: true
    	supports_PVRTC: false
    	supports_BGRA8888: false
    	supports_ATITC: false
    	supports_OES_packed_depth_stencil: true
D/cocos2d-x debug info: OpenGL error 0x0501 in ../../../../../../cocos2d/cocos/renderer/backend/opengl/TextureGL.cpp updateData 207
D/cocos2d-x debug info: cocos2d: QuadCommand: resizing index size from [-1] to [2560]
D/ViewRootImpl@6cbb4f0[AppActivity]: Relayout returned: oldFrame=[0,0][1920,1080] newFrame=[0,0][1920,1080] result=0x1 surface={isValid=true 545865963520} surfaceGenerationChanged=false
D/SurfaceView: Relayout returned: oldFrame=[0,0][1920,1080] newFrame=[0,0][1920,1080] result=0x1 surface={Surface(name=null)/@0x64cd84c isValid=true 545865974272}
D/ViewRootImpl@6cbb4f0[AppActivity]: MSG_RESIZED_REPORT: ci=Rect(0, 0 - 0, 0) vi=Rect(0, 0 - 0, 0) or=2
D/ViewRootImpl@6cbb4f0[AppActivity]: mHardwareRenderer.initializeIfNeeded()#2 mSurface={isValid=true 545865963520}
D/Cocos2dxActivity: onWindowFocusChanged() hasFocus=true
D/SEM_CLIP_SemClipboardManager: isCocktailBarDisplayed : false
V/InputMethodManager: Starting input: tba=android.view.inputmethod.EditorInfo@69b8111 nm : com.cshift.test ic=null
I/InputMethodManager: [IMM] startInputInner - mService.startInputOrWindowGainedFocus
D/InputTransport: Input channel constructed: fd=76
V/InputMethodManager: Starting input: tba=android.view.inputmethod.EditorInfo@5af5276 nm : com.cshift.test ic=null
D/ViewRootImpl@6cbb4f0[AppActivity]: ViewPostImeInputStage processPointer 0
W/System: ClassLoader referenced unknown path: /system/framework/QPerformance.jar
E/BoostFramework: BoostFramework() : Exception_1 = java.lang.ClassNotFoundException: Didn't find class "com.qualcomm.qti.Performance" on path: DexPathList[[],nativeLibraryDirectories=[/system/lib64, /vendor/lib64]]
V/BoostFramework: BoostFramework() : mPerf = null
D/ViewRootImpl@6cbb4f0[AppActivity]: ViewPostImeInputStage processPointer 1
D/cocos2d-x debug info: Assert failed: reference count should be greater than 0
E/cocos2d-x assert: ../../../../../../cocos2d/cocos/base/CCRef.cpp function:release line:99
D/cocos2d-x debug info: Assert failed: reference count should be greater than 0
E/cocos2d-x assert: ../../../../../../cocos2d/cocos/base/CCRef.cpp function:release line:99
D/cocos2d-x debug info: Assert failed: reference count should be greater than 0
E/cocos2d-x assert: ../../../../../../cocos2d/cocos/base/CCRef.cpp function:release line:99
D/cocos2d-x debug info: Assert failed: reference count should be greater than 0
E/cocos2d-x assert: ../../../../../../cocos2d/cocos/base/CCRef.cpp function:release line:99
A/libc: Fatal signal 11 (SIGSEGV), code 2, fault addr 0x7ef9180690 in tid 10406 (GLThread 6245)

These are the outputs.
How can I fix this?

THESE ARE THE SCREEN RECORDINGS, (capitalized for readability)



Yep, seems like debugging was the only solution.

So, it seems like stopWatchLabel = Label::createWithTTF("0.0->", "fonts/FiraCode-Regular.ttf", 96); was the problem.
I changed the font size, 96, to 20 or smaller and it worked. I don’t know why though. Debugging was the solution.

slackmoehrle said:
Did you step through using the debugger?

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Not all fonts are created equal. Perhaps a different TTF would allow a larger font size or it’s possible characters are missing. It’s always safe to debug with Arial.

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