Android Open Source - SimpleReflectedLightMeter Exif Info

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Back to project page SimpleReflectedLightMeter.

License

The source code is released under:

MIT License

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Java Source Code

/*
 * ExifInfo.java//  w w w  .ja  v  a2s  .  c o m
 *
 *  (c) 2013 mugcupsoup@gmail.com
 *
 *  Licensed under the MIT license.
 *  http://www.opensource.org/licenses/mit-license
 */

package com.gmail.mugucupsoup.android.LightMeter;

import android.annotation.SuppressLint;
import java.io.Serializable;

@SuppressLint("UseValueOf")
public class ExifInfo implements Serializable{
  private static final long serialVersionUID = 3988263042079491967L;
  private double EvValue=0;
  private double FNumber=0;// 1.4 2.0 2.8 ...
  private double ExposureTime=0;//sec
  private int ISOSpeedRatings=0;// 100 200 400
  private byte[] thumbnailBytes = null;
  private String FNumberStr=null;
  private String ExposureTimeStr=null;
  boolean hasFnumber = true;

  public ExifInfo(){
    
  }
  
  public byte[] getThumbBytes() {
    return this.thumbnailBytes;
  }
  public void setThumbBytes(byte[] thumbnailBytes) {
    this.thumbnailBytes = thumbnailBytes;
  }

  public double getFNumber() {
    return this.FNumber;
  }
  
  public double getExposureTime() {
    return this.ExposureTime;
  }
  
  public int getIsoValue() {
    return this.ISOSpeedRatings;
  }
  
  public void setIsoValue(int isoValue) {
    this.ISOSpeedRatings = isoValue;
    this.calcEv();
  }
  
  public double getEvValue() {
    return EvValue;
  }

  public String getFNumberStr() {
    return FNumberStr;
  }

  public void setFNumberStr(String fNumberStr) {
    this.FNumberStr = fNumberStr;
    this.calcEv();
  }

  public String getExposureTimeStr() {
    return this.ExposureTimeStr;
  }

  public void setExposureTimeStr(String exposureTimeStr) {
    this.ExposureTimeStr = exposureTimeStr;
    this.calcEv();
  }
  
  public boolean isHasFnumber() {
    return this.hasFnumber;
  }

  public void setHasFnumber(boolean hasFnumber) {
    this.hasFnumber = hasFnumber;
  }

  private void calcEv() {
    if(this.ExposureTimeStr == null || this.FNumberStr == null || this.ISOSpeedRatings == 0) return;
    this.ExposureTime = this.getValueFromRational(this.ExposureTimeStr);
    this.FNumber = this.getValueFromRational(this.FNumberStr);    
    this.EvValue = (Math.log(Math.pow(this.FNumber, 2.0)) / Math.log(2.0)) - (Math.log(this.ExposureTime) / Math.log(2.0)) - (Math.log(this.ISOSpeedRatings/100.0) / Math.log(2.0));
  }
  
  private double getValueFromRational(String str) {
    if(str == null) return 0;
    String[] numArr = str.split("/");
    if(numArr.length == 1){
      return  new Double(numArr[0]).doubleValue();
    }else{
      return  new Double(numArr[0]).doubleValue()/new Double(numArr[1]).doubleValue();
    }
  }
  
}

Java Source Code List