set Best Camera Exposure Value - Android Camera

Android examples for Camera:Camera Attribute

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  2. Android
  3. Camera
  4. Camera Attribute

Description

set Best Camera Exposure Value

Demo Code

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

public class Main {
  private static final String TAG = "";
  private static final float MAX_EXPOSURE_COMPENSATION = 1.5f;
  private static final float MIN_EXPOSURE_COMPENSATION = 0.0f;

  public static void setBestExposure(Camera.Parameters parameters, boolean lightOn) {
    int minExposure = parameters.getMinExposureCompensation();
    int maxExposure = parameters.getMaxExposureCompensation();
    float step = parameters.getExposureCompensationStep();
    if ((minExposure != 0 || maxExposure != 0) && step > 0.0f) {
      float targetCompensation = lightOn ? MIN_EXPOSURE_COMPENSATION : MAX_EXPOSURE_COMPENSATION;
      int compensationSteps = Math.round(targetCompensation / step);
      float actualCompensation = step * compensationSteps;
      // Clamp value:
      compensationSteps = Math.max(Math.min(compensationSteps, maxExposure), minExposure);
      if (parameters.getExposureCompensation() == compensationSteps) {
      } else {/*from   w w w.  ja  va  2  s . c  om*/
        parameters.setExposureCompensation(compensationSteps);
      }
    } else {
      Log.i(TAG, "Here");
    }
  }
}

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