QiblaLocator

QiblaLocator is a application to show direction for qibla (mecca) by utilizing the accelerometer and magnetic field sensor in your android device.

The accelerometer is a transducer that is used to measure acceleration, detecting and measuring the vibration, or to measure the acceleration due to gravity.

Magnetic field is a sensor to measure the ambient geomagnetic field in μT. Sometimes referred to as a "magnetometer". It can also be used to determine the orientation. Magnetic sensors measure magnetic field strength and fluctuations, and divide the measurement to the X, Y, Z and components.

This application do not need internet connection to show the direction, so it can use anytime.

Hopefully useful...

note: tested in ICS Xperia Neo L