Hi all, I’m making a game with cocos2d-x for Android using C++. Now I’m looking for a way to open another Android App (likes YouTube, Google Play Store, …) using their package name from inside my game through a button . I have searched around and found that it could be done in Java code with something like this:
Intent launchIntent = getPackageManager().getLaunchIntentForPackage("com.package.address");
if (launchIntent != null) {
startActivity(launchIntent);//null pointer check in case package name was not found
}
My question is: Is it possible to open another Android App in my native code (.cpp files) or I have to put them in java side (.java files)? If I have to do it in .java files, where should I put it? I always work with .cpp files in Visual Studio, compile with cmd and run with emulator on Android Studio, I have never worked with .java files that generated by cocos2d-x in Android Studio, the engine just makes everything ready for me so I got a little confused here.
Your attention and help is very much appreciated.
Hi
you can use JNI for this …
if you are using android-studio add this to AppActivity.java in proj.android-studio/app/src/org/cocos2dx/cpp/AppActivity.java
and if you’re using eclipse add this to /proj.android/src/org/cocos2dx/cpp/AppActivity.java
public class AppActivity extends Cocos2dxActivity {
public static Activity _activity;
@Override
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
_activity = this;
}
public static void openAnotherApp(){
Intent launchIntent = getPackageManager().getLaunchIntentForPackage("com.package.address");
if (launchIntent != null) {
startActivity(launchIntent);//null pointer check in case package name was not found
}
}
}
and then in your Scene or another class just call this java method like this :
Cpp class :
// C and C++ headers
// cocos2d-x headers
#if (CC_TARGET_PLATFORM == CC_PLATFORM_ANDROID)
#include "platform/android/jni/JniHelper.h"
#endif
USING_NS_CC;
Scene* GameScene::createScene()
{
// 'scene' is an autorelease object
auto scene = Scene::create();
// 'layer' is an autorelease object
auto layer = GameScene::create();
// add layer as a child to scene
scene->addChild(layer);
// return the scene
return scene;
}
// implementation of GameScene
GameScene::GameScene()
{
}
GameScene::~GameScene()
{
}
GameScene* GameScene::create()
{
GameScene* ret = new (std::nothrow) GameScene();
if (ret && ret->init())
{
ret->autorelease();
}
else
{
CC_SAFE_DELETE(ret);
}
return ret;
}
// on "init" you need to initialize your instance
bool GameScene::init()
{
//////////////////////////////
// 1. super init first
if ( !Layer::init() )
{
return false;
}
#if (CC_TARGET_PLATFORM == CC_PLATFORM_ANDROID)
cocos2d::JniMethodInfo methodInfo;
if(!cocos2d::JniHelper::getStaticMethodInfo(methodInfo , "org/cocos2dx/cpp/AppActivity" , "openAnotherApp" , "()V")){
}
methodInfo.env->CallStaticVoidMethod(methodInfo.classID , methodInfo.methodID);
methodInfo.env->DeleteLocalRef(methodInfo.classID);
#endif
return true;
}
Hi @michio, thanks for your help, it works like a charm. However, I’m running into another problem that my Game crashed.
My expect: Press the button => pause my game and open You Tube on Android => Press Back Button => pause You Tube and resume my game. What happens: I could open You Tube but my App crashed when I press back button. I got the following error code from Android Studio:
A/libc: Fatal signal 11 (SIGSEGV) at 0x0004fb18 (code=1), thread 1975 (Thread-55)
I’m trying to performs some actions before opening others app and they might cause the crash because my Game runs without any problem if I remove those actions and leave openApp function alone.
My code :
auto imageOpeningAction = CallFunc::create([&]() {
mOpeningImage->setEnabled(true);
mOpeningImage->setOpacity(255);
mOpeningImage->setPosition(menuItem->getPosition());
mOpeningImage->runAction(fullScale);
});
auto imageClosingAction = CallFunc::create([&]() {
mOpeningImage->runAction(reverseScale);
mOpeningImage->setOpacity(0);
mOpeningImage->setEnabled(false);
});
auto openAnotherApp = CallFunc::create([&]() { // Open YouTube App
HelloWorld::openApp(packageName);
});
runAction(Sequence::create(imageOpeningAction->clone(), DelayTime::create(0.5f), openAnotherApp->clone(), nullptr));
Hi @sinhviencodon , your welcome buddy.
your code seems fine , but if i recall correctly there is a problem with Sequence in android platform. i’m not sure about that though. check it out. and what is your cocos2dx version and android studio version?
