Android之传感器(三)加速度

以Nesus s为例，由usb到听筒是Y轴；调节音量到开关屏幕为X轴；屏幕上方向为Z轴。

public class AccessSensorManagerActivity extends Activity{

@Override
publicvoidonCreate(BundlesavedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

SensorManagersensorManager=(SensorManager)getSystemService(Context.SENSOR_SERVICE);
Sensorsensor=sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
sensorManager.registerListener(newAcceListener(),sensor,SensorManager.SENSOR_DELAY_NORMAL);
}
}

classAcceListenerimplementsSensorEventListener{
privatefloatgravity[]=newfloat[3];
privatefloatlinear_acceleration[]=newfloat[3];
@Override
publicvoidonSensorChanged(SensorEventevent){
//TODOAuto-generatedmethodstub

finalfloatalpha=0.8f;

//分别算出X,Y,Z重力方向的加速度

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];

//得到X,Y,Z各个方向的加速度，把重力加速度的影响去掉
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
publicvoidonAccuracyChanged(Sensorsensor,intaccuracy){
//TODOAuto-generatedmethodstub

}

}

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