Rotation changes helper

RotationDelegate.java

package com.mgrmobi.kitwts.common.utils;

import android.app.Activity;
import android.content.Context;
import android.hardware.SensorManager;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.view.OrientationEventListener;
import android.view.Surface;
import android.view.WindowManager;

import timber.log.Timber;

/**
 * Use it as last resort,
 * for example if you need handle rotation from landscape to reverseLandscape
 *
 * @author Anton Vlasov - whalemare
 * @since 2017
 */
public class RotationDelegate {
    @NonNull
    private final Context appContext;

    @Nullable
    protected Listener listener;

    @Nullable
    private OrientationEventListener orientationEventListener;

    protected int lastRotation;

    protected WindowManager windowManager;


    public RotationDelegate(@NonNull Context appContext) {
        this.appContext = appContext;
    }

    public RotationDelegate(@NonNull Context appContext, @NonNull ListenerImpl listener) {
        this(appContext);
        this.listener = listener;
    }

    public void enable() {
        if (listener == null) {
            throw new IllegalArgumentException("You must set listener with #setRotationListener() or constructor");
        }

        windowManager = (WindowManager) appContext.getSystemService(Context.WINDOW_SERVICE);

        orientationEventListener = new OrientationEventListener(appContext, SensorManager.SENSOR_DELAY_NORMAL) {
            @Override
            public void onOrientationChanged(int orientation) {
                if (windowManager != null && listener != null) {
                    int newRotation = windowManager.getDefaultDisplay().getRotation();
                    if (newRotation != lastRotation) {
                        executeRotationChanges();
                    }
                }
            }
        };
        orientationEventListener.enable();
    }

    /**
     * Disabled {@link OrientationEventListener}. Use it in {@link Activity#onStop()}
     */
    public void disable() {
        if (orientationEventListener != null) {
            orientationEventListener.disable();
            orientationEventListener = null;
        } else {
            Timber.w("disable: orientationEventListener already disabled");
        }
    }

    public void setRotationListener(Listener listener) {
        this.listener = listener;
    }

    /**
     * Call it for immediately check configuration and apply changes from listeners methods.
     * Use it after call {@link #enable()} and {@link #setRotationListener(Listener)} methods
     */
    public void executeRotationChanges() {
        int newRotation = windowManager.getDefaultDisplay().getRotation();
        listener.onRotationChanges(lastRotation, newRotation);

        if (newRotation == Surface.ROTATION_90) {
            listener.onLandscape();
        } else if (newRotation == Surface.ROTATION_270) {
            listener.onLandscapeReverse();
        } else if (newRotation == Surface.ROTATION_0) {
            listener.onPortrait();
        } else if (newRotation == Surface.ROTATION_180) {
            listener.onPortraitReverse();
        }

        lastRotation = newRotation;
    }

    public interface Listener {
        void onPortrait();

        void onPortraitReverse();

        void onLandscape();

        void onLandscapeReverse();

        void onRotationChanges(int oldOrientation, int newOrientation);
    }
}

Add to manifest something like this:

            android:configChanges="layoutDirection|screenLayout|orientation|screenSize"
            android:screenOrientation="fullSensor"