Android: sharing photos to Facebook

gistfile1.txt

Uri myImageContentUri; // A content Uri to the image you would like to share.
String myAppId = "<Your_Facebook_App_Id>";

Intent shareIntent = new Intent();
shareIntent.setAction(Intent.ACTION_SEND);
shareIntent.setType("image/*");
shareIntent.putExtra(Intent.EXTRA_STREAM, myImageContentUri);

// Include your Facebook App Id for attribution
shareIntent.putExtra("com.facebook.platform.extra.APPLICATION_ID", myAppId);

startActivityForResult(Intent.createChooser(shareIntent, "Share"), myRequestId);