cocos2dx 2.2.1截图

Cocos2d-x
#1

在cocos2dx 2.2.1截图，安卓手机中看不到图片在哪？
代码如下:

CCSize size = CCDirector::sharedDirector()->getWinSize();

CCRenderTexture* pScreen = CCRenderTexture::create(size.width,size.height, kCCTexture2DPixelFormat_RGBA8888);

CCScene* pCurScene = CCDirector::sharedDirector()->getRunningScene();

pScreen->begin();

pCurScene->visit();

pScreen->end();

pScreen->saveToFile("gameScreen.png", kCCImageFormatPNG);
CC_SAFE_DELETE(pScreen);

安卓中copy出来时，io异常 java.io.FileNotFoundException:

//拷贝截图
public static String CopyGameScreenPic(String picName) throws IOException {
	boolean sdExist = Environment.getExternalStorageState().equals(
			android.os.Environment.MEDIA_MOUNTED);
	if (sdExist) {
		// 设置图片拷贝后的存储路径
		String pathString = Environment.getExternalStorageDirectory()
				+ "/mnt/sdcard/";
		File f1 = new File(pathString);
		if (!f1.exists()) {
			f1.mkdirs();
		}
		String path = pathString + picName;
		File share = getContext().getFilesDir().listFiles()[0];
		InputStream is = new FileInputStream(share);
		FileOutputStream os = new FileOutputStream(path);
		byte[] buffer = new byte[1024];
		int count = 0;
		while ((count = is.read(buffer)) > 0) {
			os.write(buffer, 0, count);
		}
		is.close();
		os.close();
		return path;
	}
	return "/mnt/sdcard/";
}

这是什么原因？