Iterate over supported camera preview sizes to see which one best fits the dimensions of the given view while maintaining the aspect ratio. - Android Camera

Android examples for Camera:Camera Preview

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  2. Android
  3. Camera
  4. Camera Preview

Description

Iterate over supported camera preview sizes to see which one best fits the dimensions of the given view while maintaining the aspect ratio.

Demo Code

import java.util.List;

import android.hardware.Camera;
import android.util.Log;

public class Main {
  private static final String TAG = "";

  public static Camera.Size getOptimalPreviewSize(List<Camera.Size> sizes,
      int w, int h) {
    final double ASPECT_TOLERANCE = 0.1;
    double targetRatio = (double) w / h;
    if (sizes == null)
      return null;

    Camera.Size optimalSize = null;// www.j a v  a  2 s  .  c o m

    double minDiff = Double.MAX_VALUE;

    int targetHeight = h;

    for (Camera.Size size : sizes) {
      double ratio = (double) size.width / size.height;
      if (Math.abs(ratio - targetRatio) > ASPECT_TOLERANCE)
        continue;
      if (Math.abs(size.height - targetHeight) < minDiff) {
        optimalSize = size;
        minDiff = Math.abs(size.height - targetHeight);
      }
    }

    if (optimalSize == null) {
      minDiff = Double.MAX_VALUE;
      for (Camera.Size size : sizes) {
        if (Math.abs(size.height - targetHeight) < minDiff) {
          optimalSize = size;
          minDiff = Math.abs(size.height - targetHeight);
        }
      }
    }
    return optimalSize;
  }
}

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