Detect Movement Accurately using Accelerometer in Android

Question

I am implementing a demo TIMER, with Vibration ( at a particular condition ), When I press start my timer starts running.. and when I stop it using stop button, it simply stops.

Answer 1

I think the next stage in the development of your app is to look at values of acceleration that are produced in a spreadsheet. I use Excel for this, but any tool that can produce graphs will do. So alter onSensorChanged() to something like

public void onSensorChanged(SensorEvent event) {
    float x = event.values[0];
    float y = event.values[1];
    float z = event.values[2];

    float mAccelCurrent = FloatMath.sqrt(x*x + y*y + z*z);
    float mAccel = mAccel * 0.9f + mAccelCurrent * 0.1f;
    Log.d("onSensorChanged",System.currentTimeMillis()+","+mAccelCurrent +","+mAccel);

}

and then you can capture the currentTime, mAccelCurrent and mAccel into the Android logging mechanism. Alternatively, create your own text file, write the values there, and open the file in a tool that can produce graphs. From the graphs, you can then decide what values to use for your trigger.