Android sensor (3) Acceleration

Taking nesus s as an example, from USB to the receiver is the Y axis, adjust the volume to the switch screen is the X axis, and the on-screen direction is the Z axis.

Public class accesssensormanageractivity extends activity {

@ Override
Public void oncreate (bundle savedinstancestate ){
Super. oncreate (savedinstancestate );
Setcontentview (R. layout. Main );

Sensormanager = (sensormanager) getsystemservice (context. sensor_service );
Sensor sensor = sensormanager. getdefasensensor (sensor. type_accelerometer );
Sensormanager. registerlistener (New accelistener (), sensor, sensormanager. sensor_delay_normal );
}
}

Class accelistener implements sensoreventlistener {
Private float gravity [] = new float [3];
Private float linear_acceleration [] = new float [3];
@ Override
Public void onsensorchanged (sensorevent event ){
// Todo auto-generated method stub

Final float alpha = 0.8f;

 

// Calculate the acceleration in the direction of X, Y, and Z respectively.

Gravity [0] = Alpha * gravity [0] + (1-alpha) * event. Values [0];
Gravity [1] = Alpha * gravity [1] + (1-alpha) * event. Values [1];
Gravity [2] = Alpha * gravity [2] + (1-alpha) * event. Values [2];

// Obtain the acceleration in all directions of X, Y, and Z, and remove the influence of gravity acceleration.
Linear_acceleration [0] = event. Values [0]-gravity [0];
Linear_acceleration [1] = event. Values [1]-gravity [1];
Linear_acceleration [2] = event. Values [2]-gravity [2];


System. Out. println ("X:" + linear_acceleration [0]);
System. Out. println ("Y:" + linear_acceleration [1]);
System. Out. println ("Z:" + linear_acceleration [2]);
}

@ Override
Public void onaccuracychanged (sensor, int accuracy ){
// Todo auto-generated method stub

}

}