Hi. Are you sure /sdcard path is valid at all? Different Android versions use different sdcard paths. Use getExternalStorageDirectory(): https://stackoverflow.com/a/21230946/3404710 Note that you need a special permission to read from external storage, too.
2017-05-26 13:06 GMT+07:00 龚来恩 <[email protected]>: > Hi All, > I'm trying to make osgEarth run on Android (OSG 3.2 & osgEarth 2.3). Now > the earth can display on Android system. But I run into a problem with > regard to std:istream. I tried to load an osgb file by the following code > osg::ref_ptr<osg::Node> node = > osgDB::readNodeFile("/sdcard/WV/Models/tk.osgb"); > the variable node's value is always be NULL. I step into this line and > traced down to file ReaderWriterOSG2.cpp > virtual ReadResult readNode( const std::string& file, const Options* options > ) const > { > ReadResult result = ReadResult::FILE_LOADED; > std::string fileName = file; > std::ios::openmode mode = std::ios::in; > Options* local_opt = prepareReading( result, fileName, mode, options > ); > if ( !result.success() ) return result; > > osgDB::ifstream istream( fileName.c_str(), mode ); > return readNode( istream, local_opt ); > } > > virtual ReadResult readNode( std::istream& fin, const Options* options ) > const > { > osg::ref_ptr<InputIterator> ii = readInputIterator(fin, options); > if ( !ii ) return ReadResult::FILE_NOT_HANDLED; > > InputStream is( options ); > if ( is.start(ii.get())!=InputStream::READ_SCENE ) > { > CATCH_EXCEPTION(is); > return ReadResult::FILE_NOT_HANDLED; > } > > is.decompress(); CATCH_EXCEPTION(is); > osg::Node* node = dynamic_cast<osg::Node*>(is.readObject()); > CATCH_EXCEPTION(is); > return node; > } > > the debugger couldn't step into the function readNode( std::istream& fin, > const Options* options ). But on windows it works. > > Can anybody tell me how to solve this problem? > > Dev Environment: > Visual Studio 2017 > Android 7.0 > Android NDK64 r13b > Arch arm64-v8a > > Best regards. > > Glen > > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
