call to OpenGL ES API with no current context (logged once per thread)

cocos2d-x C++
#1

what is the primary cause of this problem

#2

Could you please describe the engine version and how to reproduce it?

#3

@zhangxm
(cocos2d-x-2.2.2) this is the version that I am using.

const char * HelloWorld::addImage(){

JavaVM jvm; //this is important to avoid threading errors
thisEnv->GetJavaVM(&jvm); //this is important to avoid threading errors
jvm->AttachCurrentThread(&thisEnv, 0); //this is important to avoid threading errors
//jstring jstr = thisEnv->NewStringUTF(“From jni”);
jclass cls = thisEnv->GetObjectClass(thisObj);
jmethodID method = thisEnv->GetMethodID(cls, “getPath”,"()Ljava/lang/String;");
jstring result = (jstring)thisEnv->CallObjectMethod(thisObj, method);
// call the sayHello() method
const char * string=thisEnv->GetStringUTFChars(result, 0);
//CCMessageBox(string,“Alert”);
//if(string!=NULL){
CCSprite person = CCSprite::create(string);
//person->setPosition(ccp(visibleSize.width/2 + origin.x, visibleSize.height/2 + origin.y));
person->setAnchorPoint(ccp(0, -.75));
person->setPosition(ccp(0,0));
this->addChild(person,204);

return string;

}
and calling the function above inside of AppDelegate::applicationWillEnterForeground will cause that error…help me please

#4

Don’t call it in AppDelegate::applicationWillEnterForeground. Because OpenGL context will be lost when enter to background. At this time OpenGL context may not be re-create by Android system. So, please do the operation after it is totally enter foreground.

#5

@zhangxm

I need to call the function above after the user take a picture so that the captured picture will be used as a sprite. How can I do it after it is totally enter foreground? I really need your help please.

#6

For example, you can use schedule to delay some time.

#7

you mean scheduler? what i tried is like this

HelloWord hello;
hello.schedulOnce(schedule_select(hello.loadImage),3.0f);
I am calling this inside of AppDelegate::ApplicationWillEnterForeground

but putting the above code has no effect.

#8

CCScheduler#scheduleSelector. Selector already scheduled. Updating interval from: 0.0000 to 0.0000
I got this message when executing the code

#9

It seems it takes more than 3 seconds for entering to foreground. How about set a long time.

#10

@zhangxm
Sir i tried this->scheduleOnce(schedule_selector(HelloWorld::displayImage), 3.0f); putting it inside of HelloWorld init() function and it executed after 3 seconds

but when I call it inside of appdelegate there is no effect, is scheduleOnce applicable inside of appdelegate class?

#11

CCDirector::sharedDirector()->getScheduler()->scheduleSelector(schedule_selector(HelloWorld::displayImage), this , 5, false, 0, 0 );

using the above code, the function will be successfully executed within the specified delay time but the problem is the sprite will not display…there is no error produced

#12

Does it have problem if you invoke these codes in other place?

#13

I have the same problem could you help me ? my email qzzzzq@sina.cn If you are willing to help me
by the way are you Chinese ？