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/*
* Copyright (C) 2015 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License
*/
package com.android.incallui;
import android.content.Context;
import android.content.res.Configuration;
import android.view.OrientationEventListener;
import android.hardware.SensorManager;
import android.view.Surface;
import android.content.pm.ActivityInfo;
/**
* This class listens to Orientation events and overrides onOrientationChanged which gets
* invoked when an orientation change occurs. When that happens, we notify InCallUI registrants
* of the change.
*/
public class InCallOrientationEventListener extends OrientationEventListener {
/**
* Screen orientation angles one of 0, 90, 180, 270, 360 in degrees.
*/
public static int SCREEN_ORIENTATION_0 = 0;
public static int SCREEN_ORIENTATION_90 = 90;
public static int SCREEN_ORIENTATION_180 = 180;
public static int SCREEN_ORIENTATION_270 = 270;
public static int SCREEN_ORIENTATION_360 = 360;
public static int FULL_SENSOR_SCREEN_ORIENTATION =
ActivityInfo.SCREEN_ORIENTATION_FULL_SENSOR;
public static int NO_SENSOR_SCREEN_ORIENTATION =
ActivityInfo.SCREEN_ORIENTATION_NOSENSOR;
/**
* This is to identify dead zones where we won't notify others of orientation changed.
* Say for e.g our threshold is x degrees. We will only notify UI when our current rotation is
* within x degrees right or left of the screen orientation angles. If it's not within those
* ranges, we return SCREEN_ORIENTATION_UNKNOWN and ignore it.
*/
private static int SCREEN_ORIENTATION_UNKNOWN = -1;
// Rotation threshold is 10 degrees. So if the rotation angle is within 10 degrees of any of
// the above angles, we will notify orientation changed.
private static int ROTATION_THRESHOLD = 10;
/**
* Cache the current rotation of the device.
*/
private static int sCurrentOrientation = SCREEN_ORIENTATION_0;
public InCallOrientationEventListener(Context context) {
super(context);
}
/**
* Handles changes in device orientation. Notifies InCallPresenter of orientation changes.
*
* Note that this API receives sensor rotation in degrees as a param and we convert that to
* one of our screen orientation constants - (one of: {@link SCREEN_ORIENTATION_0},
* {@link SCREEN_ORIENTATION_90}, {@link SCREEN_ORIENTATION_180},
* {@link SCREEN_ORIENTATION_270}).
*
* @param rotation The new device sensor rotation in degrees
*/
@Override
public void onOrientationChanged(int rotation) {
if (rotation == OrientationEventListener.ORIENTATION_UNKNOWN) {
return;
}
final int orientation = toScreenOrientation(rotation);
if (orientation != SCREEN_ORIENTATION_UNKNOWN && sCurrentOrientation != orientation) {
sCurrentOrientation = orientation;
InCallPresenter.getInstance().onDeviceOrientationChange(sCurrentOrientation);
}
}
/**
* Enables the OrientationEventListener and notifies listeners of current orientation if
* notify flag is true
* @param notify true or false. Notify device orientation changed if true.
*/
public void enable(boolean notify) {
super.enable();
if (notify) {
InCallPresenter.getInstance().onDeviceOrientationChange(sCurrentOrientation);
}
}
/**
* Enables the OrientationEventListener with notify flag defaulting to false.
*/
public void enable() {
enable(false);
}
/**
* Converts sensor rotation in degrees to screen orientation constants.
* @param rotation sensor rotation angle in degrees
* @return Screen orientation angle in degrees (0, 90, 180, 270). Returns -1 for degrees not
* within threshold to identify zones where orientation change should not be trigerred.
*/
private int toScreenOrientation(int rotation) {
// Sensor orientation 90 is equivalent to screen orientation 270 and vice versa. This
// function returns the screen orientation. So we convert sensor rotation 90 to 270 and
// vice versa here.
if (isInLeftRange(rotation, SCREEN_ORIENTATION_360, ROTATION_THRESHOLD) ||
isInRightRange(rotation, SCREEN_ORIENTATION_0, ROTATION_THRESHOLD)) {
return SCREEN_ORIENTATION_0;
} else if (isWithinThreshold(rotation, SCREEN_ORIENTATION_90, ROTATION_THRESHOLD)) {
return SCREEN_ORIENTATION_270;
} else if (isWithinThreshold(rotation, SCREEN_ORIENTATION_180, ROTATION_THRESHOLD)) {
return SCREEN_ORIENTATION_180;
} else if (isWithinThreshold(rotation, SCREEN_ORIENTATION_270, ROTATION_THRESHOLD)) {
return SCREEN_ORIENTATION_90;
}
return SCREEN_ORIENTATION_UNKNOWN;
}
private static boolean isWithinRange(int value, int begin, int end) {
return value >= begin && value < end;
}
private static boolean isWithinThreshold(int value, int center, int threshold) {
return isWithinRange(value, center - threshold, center + threshold);
}
private static boolean isInLeftRange(int value, int center, int threshold) {
return isWithinRange(value, center - threshold, center);
}
private static boolean isInRightRange(int value, int center, int threshold) {
return isWithinRange(value, center, center + threshold);
}
}
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