Facebook Official Java app have its own Feature to upload to Page but different apps from different vendors dont have a uniform solution to ensure Photos or status uploads with surety
Here is the Best solution from Facebook itself
Create your Page and Go to Your Page from Profile
now Click on
Edit Page >> Update Info
Click on Mobile
on right With Mobile Email you will get a secret email address
To upload a photo, email the photo to this address and include a caption in the email subject line.
To update your status, write in the email subject line and leave the email body blank.