Image Capture and Conversion

Need a Android App with Code for following functionality : 1) Code should be Moduler 2) Code should be easy to integrate with other Andriod App. 3) Code Should Allow capture of A4 and Legal size paper from Camera. 4) Code Should set the Camera for autofocus / autoflash before taking picture of document by setting a parameter and not via front-end 5) Code Should provide option to convert Image to Black&white , Grayscale or retail in Colour by setting a parameter and not via front-end 6) Code Should compress each scanned Page to 100-200 KBytes for Black&White image, 200 to 400 Kbytes for Greyscale Image , 500 to 600 Kbytes of colour image without loosing readability of the document 7) Code should allow multipage document to be captured as multiple images with above compression (point 5) and conversion (point 6) and the end result should be a one JPEG image per Page scanned.