goose
gallery_with_grid_view
delete unnecessary files
refactor, pass size into adapter.
change to use ArrayAdapter
add mPaths
update ignore files
update ignore files
set num of columns in java code
remove codes about cameraActivity
fix conflicts
delete unused file
should not delete CameraActivity
fix NPE
Merge pull request #6 from cllin/implement_main_5

implement basic main page and gallery page #5
fix conflicts, change some method in dbhelper to static