Android Screen Orientation Check roundOrientation(int orientation, int orientationHistory)

Description

round Orientation

License

Apache License

Declaration

public static int roundOrientation(int orientation,
            int orientationHistory) 

Method Source Code

/*//www.ja  v  a  2s  .c  o  m
 * Copyright (C) 2009 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.
 */

import android.app.Activity;
import android.app.AlertDialog;
import android.app.admin.DevicePolicyManager;
import android.content.ActivityNotFoundException;
import android.content.ComponentName;
import android.content.ContentResolver;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Matrix;
import android.graphics.Point;
import android.graphics.Rect;
import android.graphics.RectF;
import android.hardware.Camera;
import android.hardware.Camera.CameraInfo;
import android.hardware.Camera.Parameters;
import android.hardware.Camera.Size;
import android.location.Location;
import android.net.Uri;
import android.os.Handler;
import android.os.ParcelFileDescriptor;
import android.telephony.TelephonyManager;
import android.util.DisplayMetrics;
import android.util.Log;
import android.util.TypedValue;
import android.view.Display;
import android.view.OrientationEventListener;
import android.view.Surface;
import android.view.View;
import android.view.WindowManager;
import android.view.animation.AlphaAnimation;
import android.view.animation.Animation;
import android.widget.Toast;
import com.android.camera.CameraActivity;
import com.android.camera.CameraDisabledException;
import com.android.camera.CameraHolder;
import com.android.camera.CameraManager;
import com.android.camera.util.IntentHelper;
import com.android.camera2.R;
import java.io.Closeable;
import java.io.IOException;
import java.lang.reflect.Method;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;
import java.util.Locale;
import java.util.StringTokenizer;

public class Main{
    public static final int ORIENTATION_HYSTERESIS = 5;
    public static int roundOrientation(int orientation,
            int orientationHistory) {
        boolean changeOrientation = false;
        if (orientationHistory == OrientationEventListener.ORIENTATION_UNKNOWN) {
            changeOrientation = true;
        } else {
            int dist = Math.abs(orientation - orientationHistory);
            dist = Math.min(dist, 360 - dist);
            changeOrientation = (dist >= 45 + ORIENTATION_HYSTERESIS);
        }
        if (changeOrientation) {
            return ((orientation + 45) / 90 * 90) % 360;
        }
        return orientationHistory;
    }
}

Related

1. getRotationOffset()
2. isDefaultToPortrait(Activity activity)
3. isLandScape(Context context)
4. isLandscape(final Context context)
5. reverseDirectionNow(final float direction)
6. getDisplayOrientation(Context context)