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CameraOrientationListener.java
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CameraOrientationListener.java
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package com.androidzeitgeist.mustache.listener;
import android.content.Context;
import android.hardware.SensorManager;
import android.view.OrientationEventListener;
/**
* Orientation listener to remember the device's orientation when the user presses
* the shutter button.
*
* The orientation will be normalized to return it in steps of 90 degrees
* (0, 90, 180, 270).
*
* @author Sebastian Kaspari <sebastian@androidzeitgeist.com>
*/
public class CameraOrientationListener extends OrientationEventListener {
private int currentNormalizedOrientation;
private int rememberedNormalizedOrientation;
public CameraOrientationListener(Context context) {
super(context, SensorManager.SENSOR_DELAY_NORMAL);
}
@Override
public void onOrientationChanged(int orientation) {
if (orientation != ORIENTATION_UNKNOWN) {
currentNormalizedOrientation = normalize(orientation);
}
}
private int normalize(int degrees) {
if (degrees > 315 || degrees <= 45) {
return 0;
}
if (degrees > 45 && degrees <= 135) {
return 90;
}
if (degrees > 135 && degrees <= 225) {
return 180;
}
if (degrees > 225 && degrees <= 315) {
return 270;
}
throw new RuntimeException("The physics as we know them are no more. Watch out for anomalies.");
}
public void rememberOrientation() {
rememberedNormalizedOrientation = currentNormalizedOrientation;
}
public int getRememberedOrientation() {
return rememberedNormalizedOrientation;
}
}