Home Unlabelled Set latitude and longitude in Exif, setAttribute() and saveAttributes().

Set latitude and longitude in Exif, setAttribute() and saveAttributes().

To modify Exit tag, you can call the method setAttribute(), and call saveAttributes() to save the tags in Exif.

Note 1: You have to grant permission of "android.permission.WRITE_EXTERNAL_STORAGE", otherwise the tags cannot be saved - But no error return to inform you!

Note 2: In this example, the Android build-in Gallery App doesn't recognize the updated Exif GPS location. In order to force MediaStore re-scan the updated file, read here.

Modify main.xml to add a button to update Tags.

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
   android:orientation="vertical"
   android:layout_width="fill_parent"
   android:layout_height="fill_parent"
   >
<TextView 
   android:layout_width="fill_parent"
   android:layout_height="wrap_content"
   android:text="@string/hello"
   />
<ScrollView
   android:orientation="vertical"
   android:layout_width="fill_parent"
   android:layout_height="fill_parent"
>
<LinearLayout
   android:orientation="vertical"
   android:layout_width="fill_parent"
   android:layout_height="wrap_content"
   >
<TextView 
   android:id="@+id/exif"
   android:layout_width="fill_parent"
   android:layout_height="wrap_content"
   />
<ImageView 
   android:id="@+id/image"
   android:layout_width="300dp"
   android:layout_height="300dp"
   />
<Button 
   android:id="@+id/update"
   android:layout_width="fill_parent"
   android:layout_height="wrap_content"
   android:text="Update with dummy location"
   />
</LinearLayout>
</ScrollView>
</LinearLayout>

Implement UpdateExit() to update Exif Tags, with dummy LATITUDE and LONGITUDE.

package com.AndroidExif;

import java.io.IOException;

import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.media.ExifInterface;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

public class AndroidExifActivity extends Activity {

String imagefile ="/sdcard/DCIM/DSC_9599.jpg";
ImageView image;
TextView Exif;
Button updateDummyLoc;

ExifInterface exifInterface;

   /** Called when the activity is first created. */
   @Override
   public void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       setContentView(R.layout.main);
       image = (ImageView)findViewById(R.id.image);
       Exif = (TextView)findViewById(R.id.exif);
      
       Bitmap bm = BitmapFactory.decodeFile(imagefile);
       image.setImageBitmap(bm);
      
       Exif.setText(ReadExif(imagefile));
      
       updateDummyLoc = (Button)findViewById(R.id.update);
       updateDummyLoc.setOnClickListener(new Button.OnClickListener(){

  @Override
  public void onClick(View arg0) {
   // TODO Auto-generated method stub
   UpdateExit();
  }});
   }
  
   void UpdateExit(){
    String dummyLATITUDE = "0/1,16/1,5935883/125557";
    String dummyLATITUDE_REF = "N";
    String dummyLONGITUDE = "0/1,7/1,1429891026/483594097";
    String dummyLONGITUDE_REF = "E";
   
    exifInterface.setAttribute(ExifInterface.TAG_GPS_LATITUDE, dummyLATITUDE);
 exifInterface.setAttribute(ExifInterface.TAG_GPS_LATITUDE_REF, dummyLATITUDE_REF);
 exifInterface.setAttribute(ExifInterface.TAG_GPS_LONGITUDE, dummyLONGITUDE);
 exifInterface.setAttribute(ExifInterface.TAG_GPS_LONGITUDE_REF, dummyLONGITUDE_REF);

 try {
  exifInterface.saveAttributes();
  Toast.makeText(AndroidExifActivity.this,
    "saveAttribute finished",
    Toast.LENGTH_LONG).show();
 } catch (IOException e) {
  // TODO Auto-generated catch block
  e.printStackTrace();
  Toast.makeText(AndroidExifActivity.this,
    e.toString(),
    Toast.LENGTH_LONG).show();
 }
   }
  
   String ReadExif(String file){
    String exif="Exif: " + file;
    try {
  exifInterface = new ExifInterface(file);

  exif += "\nIMAGE_LENGTH: " + exifInterface.getAttribute(ExifInterface.TAG_IMAGE_LENGTH);
  exif += "\nIMAGE_WIDTH: " + exifInterface.getAttribute(ExifInterface.TAG_IMAGE_WIDTH);
  exif += "\n DATETIME: " + exifInterface.getAttribute(ExifInterface.TAG_DATETIME);
  exif += "\n TAG_MAKE: " + exifInterface.getAttribute(ExifInterface.TAG_MAKE);
  exif += "\n TAG_MODEL: " + exifInterface.getAttribute(ExifInterface.TAG_MODEL);
  exif += "\n TAG_ORIENTATION: " + exifInterface.getAttribute(ExifInterface.TAG_ORIENTATION);
  exif += "\n TAG_WHITE_BALANCE: " + exifInterface.getAttribute(ExifInterface.TAG_WHITE_BALANCE);
  exif += "\n TAG_FOCAL_LENGTH: " + exifInterface.getAttribute(ExifInterface.TAG_FOCAL_LENGTH);
  exif += "\n TAG_FLASH: " + exifInterface.getAttribute(ExifInterface.TAG_FLASH);
  exif += "\nGPS related:";

  float[] LatLong = new float[2];
  if(exifInterface.getLatLong(LatLong)){
   exif += "\n latitude= " + LatLong[0];
   exif += "\n longitude= " + LatLong[1];
  }else{
   exif += "Exif tags are not available!";
  }
 
  Toast.makeText(AndroidExifActivity.this,
    "finished",
    Toast.LENGTH_LONG).show();
 
 } catch (IOException e) {
  // TODO Auto-generated catch block
  e.printStackTrace();
  Toast.makeText(AndroidExifActivity.this,
    e.toString(),
    Toast.LENGTH_LONG).show();
 }
   
    return exif;
   }

}

Set latitude and longitude in Exif, setAttribute() and saveAttributes().

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