Google Has Launch Official Blogger App for Android
It support for multiple blogs .that is allowing you to keep a log in of each in the app and switch between blogs as and when needed.
A handy offline mode has also been included in it.lets you create the content when you are out of your perticular place and when you get back to a signal, you can then re-sync things back up.
Users can access to the phone’s photo gallery from the app which lets you upload pictures you have stored or captured to your blog.
You can grab the new app from the Android Market.this is the best aap for the bloggers.