Tuesday, February 21, 2012

Detect Android device rotation around the Z, X and Y axis

Example to detect Android device rotation around the Z(Azimuth), X(Pitch) and Y(Roll) axis.
Detect Android device rotation around the Z, X and Y axis
package com.exercise.AndroidAccelerometer;

import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;

import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;

public class AndroidAccelerometerActivity extends Activity
implements SensorEventListener{

private SensorManager sensorManager;
private Sensor sensorAccelerometer;

TextView readingAzimuth, readingPitch, readingRoll;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

sensorManager = (SensorManager)getSystemService(SENSOR_SERVICE);
sensorAccelerometer = sensorManager.getDefaultSensor(
Sensor.TYPE_ACCELEROMETER);

readingAzimuth = (TextView)findViewById(R.id.azimuth);
readingPitch = (TextView)findViewById(R.id.pitch);
readingRoll = (TextView)findViewById(R.id.roll);

}

@Override
protected void onPause() {
super.onPause();
sensorManager.unregisterListener(this);
}

@Override
protected void onResume() {
super.onResume();
sensorManager.registerListener(this,
sensorAccelerometer,
SensorManager.SENSOR_DELAY_NORMAL);
}

@Override
public void onAccuracyChanged(Sensor arg0, int arg1) {
// TODO Auto-generated method stub

}

@Override
public void onSensorChanged(SensorEvent event) {

/*
* event.values[0]: azimuth, rotation around the Z axis.
* event.values[1]: pitch, rotation around the X axis.
* event.values[2]: roll, rotation around the Y axis.
*/

float valueAzimuth = event.values[0];
float valuePitch = event.values[1];
float valueRoll = event.values[2];

readingAzimuth.setText("Azimuth: " + String.valueOf(valueAzimuth));
readingPitch.setText("Pitch: " + String.valueOf(valuePitch));
readingRoll.setText("Roll: " + String.valueOf(valueRoll));


}
}


<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >

<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/hello" />

<TextView
android:id="@+id/azimuth"
android:layout_width="fill_parent"
android:layout_height="wrap_content"/>
<TextView
android:id="@+id/pitch"
android:layout_width="fill_parent"
android:layout_height="wrap_content"/>
<TextView
android:id="@+id/roll"
android:layout_width="fill_parent"
android:layout_height="wrap_content"/>

</LinearLayout>


Download the files.

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