如何在Android中使用外部传感器？

Question

i want to build a app which detect temperature of food people milk room etc, so i want to know that how to detect a external sensor in android, which is connected to its 3.5mm audio jack,like sound read by phone can by applying temperature sensor it can sense temp.please refer me some tutorials or sample.i 've read about open data kit but don't know how to use this please help me.

     mSensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);
            mPressure = mSensorManager.getDefaultSensor(Sensor.TYPE_TEMPERATURE);

is This Works for external sensors too

Answer 1

I am not sure how much knowledge you have about sensors and how you planned to interact.

Maybe you can take a look at Raspberry Pi, its an external board which can interact with sensors, and can run linux or android operating system. It also works using internet so you can communicate between your mobile and the Raspberry Pi.