The method onSensorChanged(SensorEvent event) of SensorEventListener will be called when sensor values have changed. The rotation in degree can be retrieved from event.values[0], event.values[1] and event.values[2].
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.
Modify main.xml to have three TextView to display azimuth, pitch and roll.
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/hello"
/>
<TextView
android:id="@+id/textazimuth"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Azimuth: "
/>
<TextView
android:id="@+id/textpitch"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Pitch: "
/>
<TextView
android:id="@+id/textroll"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Roll: "
/>
</LinearLayout>
AndroidSensorEventListener.java
package com.exercise.AndroidSensorEventListener;
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;
import android.widget.Toast;
public class AndroidSensorEventListener extends Activity {
TextView textviewAzimuth, textviewPitch, textviewRoll;
private static SensorManager mySensorManager;
private boolean sersorrunning;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
textviewAzimuth = (TextView)findViewById(R.id.textazimuth);
textviewPitch = (TextView)findViewById(R.id.textpitch);
textviewRoll = (TextView)findViewById(R.id.textroll);
mySensorManager = (SensorManager)getSystemService(Context.SENSOR_SERVICE);
List<Sensor> mySensors = mySensorManager.getSensorList(Sensor.TYPE_ORIENTATION);
if(mySensors.size() > 0){
mySensorManager.registerListener(mySensorEventListener, mySensors.get(0), SensorManager.SENSOR_DELAY_NORMAL);
sersorrunning = true;
Toast.makeText(this, "Start ORIENTATION Sensor", Toast.LENGTH_LONG).show();
}
else{
Toast.makeText(this, "No ORIENTATION Sensor", Toast.LENGTH_LONG).show();
sersorrunning = false;
finish();
}
}
private SensorEventListener mySensorEventListener = new SensorEventListener() {
@Override
public void onSensorChanged(SensorEvent event) {
// TODO Auto-generated method stub
textviewAzimuth.setText("Azimuth: " + String.valueOf(event.values[0]));
textviewPitch.setText("Pitch: " + String.valueOf(event.values[1]));
textviewRoll.setText("Roll: " + String.valueOf(event.values[2]));
}
@Override
public void onAccuracyChanged(Sensor sensor, int accuracy) {
// TODO Auto-generated method stub
}
};
@Override
protected void onDestroy() {
// TODO Auto-generated method stub
super.onDestroy();
if(sersorrunning){
mySensorManager.unregisterListener(mySensorEventListener);
Toast.makeText(AndroidSensorEventListener.this, "unregisterListener", Toast.LENGTH_SHORT).show();
}
}
}
Download the files.
Related Article:
OrientationEventListener, detect orientation change from the SensorManager.
Implement a Simple Compass using SensorManager and SensorEventListener
Implement a Simple Horizontal Indicator using SensorManager and SensorEventListener
2 comments:
Hai thanks for your post......
It's really helpful.......
Excellent tutorial, works perfectly
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