Android Accelerometer values for Compass

If you are wondering how to get the values of accelerometer on Android, this is the right place for you. Today, I will show you to display sensor values which you can use in implementing a compass.



Compass activity

package com.scamex.compass;

import java.util.List;

import android.app.Activity;
import android.content.Context;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.os.Bundle;
import android.widget.TextView;

public class Compass extends Activity implements SensorEventListener {

 
 TextView tvvalues;
 
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  // TODO Auto-generated method stub
  super.onCreate(savedInstanceState);
  setContentView(R.layout.compass);
  tvvalues = (TextView) findViewById(R.id.sensorvalues);
 }
 
 @Override
 protected void onResume() {
  // TODO Auto-generated method stub
  super.onResume();
  attachSensor();
 }
 
 @Override
 protected void onPause() {
  // TODO Auto-generated method stub
  super.onPause();
  detachSensor();
 }
 
 private void attachSensor() {
  SensorManager sensorManager = getSensorManager();

  List sensors = sensorManager
    .getSensorList(Sensor.TYPE_ACCELEROMETER);
  if (sensors.size() > 0) {
   Sensor sensor = sensors.get(0);
   sensorManager.registerListener(this, sensor,
     SensorManager.SENSOR_DELAY_NORMAL);
  } else {

  }
 }
 
 private void detachSensor() {
  SensorManager sensorManager = getSensorManager();
  sensorManager.unregisterListener(this);
 }

 private SensorManager getSensorManager() {
  return (SensorManager) getBaseContext().getSystemService(
    Context.SENSOR_SERVICE);
 }
 
 
 public void onAccuracyChanged(Sensor sensor, int accuracy) {
 
  
 }

 public void onSensorChanged(SensorEvent event) { 
  float valuex = event.values[0];
  float valuey = event.values[1];
  float valuez = event.values[2];  
  tvvalues.setText("x: " + valuex + "\n" + "y: " + valuey + "\n" + "z: " + valuez);
 
 }

}




Edit you main XML file and add a TextView with the ID of 

android:id="@+id/sensorvalues" and run you application. That's it.



The ouput: