Android Camera Size Get getBestAspectPreviewSize(int displayOrientation, int width, int height, Camera.Parameters parameters, double closeEnough)

Description

get Best Aspect Preview Size

License

Apache License

Declaration

public static Size getBestAspectPreviewSize(int displayOrientation,
            int width, int height, Camera.Parameters parameters,
            double closeEnough) 

Method Source Code

/***/*from  w  w w .  j a va2  s.  co m*/
 Copyright (c) 2013 CommonsWare, LLC

 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.hardware.Camera;
import android.hardware.Camera.Size;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;

public class Main{
    public static Size getBestAspectPreviewSize(int displayOrientation,
            int width, int height, Camera.Parameters parameters) {
        return (getBestAspectPreviewSize(displayOrientation, width, height,
                parameters, 0.0d));
    }
    public static Size getBestAspectPreviewSize(int displayOrientation,
            int width, int height, Camera.Parameters parameters,
            double closeEnough) {
        double targetRatio = (double) width / height;
        Size optimalSize = null;
        double minDiff = Double.MAX_VALUE;

        if (displayOrientation == 90 || displayOrientation == 270) {
            targetRatio = (double) height / width;
        }

        List<Size> sizes = parameters.getSupportedPreviewSizes();

        Collections.sort(sizes,
                Collections.reverseOrder(new SizeComparator()));

        for (Size size : sizes) {
            double ratio = (double) size.width / size.height;

            if (Math.abs(ratio - targetRatio) < minDiff) {
                optimalSize = size;
                minDiff = Math.abs(ratio - targetRatio);
            }

            if (minDiff < closeEnough) {
                break;
            }
        }

        return (optimalSize);
    }
}

Related

1. getLargestPictureSize(CameraHost host, Camera.Parameters parameters)
2. getOptimalPreviewSize(int displayOrientation, int width, int height, Camera.Parameters parameters)
3. getSmallestPictureSize(Camera.Parameters parameters)
4. getPreviewSize(Camera.Parameters cp)