Arduino to Android Sensor result (Flood Alert)

can i connect my arduino to android via my own app ( project)__ flood alert
1. app must be downloaded from play store
2. send and receive data must use internet
3. target 200 persons
4. app for read water level in app connected to internet.
5. app can trigger alarm if safety water level is exceeded.

                                  looks more like this(pic)
pls help me...

Picture of Arduino to Android Sensor result (Flood Alert)

yes it's doable. look into connecting the arduino with an eithernet shield. More and better information is at the Arduino web site and forums