如何从静态方法显示Dialog

Question

在我的Android和IOS使用的游戏中cocos2dx,我必须显示视频(适用于Android).我打算在Dialog中展示它(在游戏视图的顶部).问题是,我没有任何Activity参考show Dialog(因为Dialogs只能在Activities中显示).尽管如此,在cocos2dx lib文件夹中,有一个Cocos2dxActivity但是我没有得到如何使用它.从C++代码,我从Java类调用静态方法,如下所示

void LMJNICommunicator::showVideo()
{
     LOGD("initialiseDatabase inside LMJNICommunicator");

     jmethodID methodID = 0;
     JNIEnv *pEnv = 0;
     pEnv = getJNIEnv();
     jclass ret = pEnv->FindClass("com/mobinius/lostmonstersclass/LMDatabaseDataManager");
     methodID = pEnv->GetStaticMethodID(ret, "showVideo", "()V");

     if (! methodID)
     {
          LOGD("Failed to find static method id of %s", "showVideo");
          return;
     }

     pEnv->CallStaticVoidMethod(ret,methodID);
     pEnv->DeleteLocalRef(ret);

}

我从C++代码调用的静态方法(在普通的Java类中)

Class LMDatabaseDataManager {

    public static void showVideo() {

         Dialog dialog = new Dialog(Cocos2dxActivity.getInstance());
         dialog.show();
        // getting Can't create handler inside thread that has not called Looper.prepare() error
    }
}

我试图Handler像这样使用但没有得到结果(在该帖子中得到相同的错误).也尝试得到Context像这样的静态.

那么,我的方式是否正确？如果不正确,请建议一种方法如何实现相同的.谢谢.

编辑:

终于得到了答案.早些时候,我试图与应用静态上下文UI线程运行在这个环节,但没有得到......与Cocos2dxActivity活动实例我知道了.

Class LMDatabaseDataManager {

    public static void showVideo() {        

    Cocos2dxActivity.getInstance().runOnUiThread(new Runnable() {

        @Override
        public void run() {
            // TODO Auto-generated method stub
            Dialog dialog = new Dialog(Cocos2dxActivity.getInstance());
            dialog.show();            
        }
    });

    }
}

Answer 1

尝试在Cocos2dxActivity中添加适当的行:

public class Cocos2dxActivity extends Activity {
    private static Cocos2dxActivity instance = null;
   @Override public void onCreate(Bundle b) {
     ...
     this.instance = this;
     }

     public static Cocos2dxActivity getInstance() {
        return instance;
     }



}

当您想要创建对话框时:

if (Cocos2dxActivity.getInstance() != null)  {
    AlertDialog dialog = new AlertDialog(Cocos2dxActivity.getInstance());
    // rest of your dialog code goes here
}