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public class ExifReaderAPP extends Activity { 
  TextView myTextView;
  private static final String TAG = "ExifReader";
  private static final String filename = "/sdcard/001.JPG";
  private ExifInterface exif;  
 
    @Override 
    public void onCreate(Bundle savedInstanceState) 
    { 
        super.onCreate(savedInstanceState); 
        setContentView(R.layout.main); 
        
        myTextView = (TextView)findViewById(R.id.text00); 
        
        try 
        { 
          exif = new ExifInterface(filename);
          WriteExif();
          exif.saveAttributes();
          //exif.commitChange();
          Toast.makeText(this, exif.toString(), Toast.LENGTH_LONG).show();
          ExifInterface exif2 = new ExifInterface(filename);
          ShowExif(exif2);
        } 
        catch (IOException e) 
        { 
          // TODO Auto-generated catch block 
          e.printStackTrace(); 
          Toast.makeText(this, "Error!", 
          Toast.LENGTH_LONG).show();
        } 
    } 
        
    private void ShowExif(ExifInterface exif) 
    { 
      Log.d(TAG, "show++");
      String myAttribute="Exif information ---\n"; 
      myAttribute += getTagString(ExifInterface.TAG_DATETIME, exif); 
      myAttribute += getTagString(ExifInterface.TAG_FLASH, exif); 
      myAttribute += getTagString(ExifInterface.TAG_GPS_LATITUDE, exif); 
      myAttribute += getTagString(ExifInterface.TAG_GPS_LATITUDE_REF, exif); 
      myAttribute += getTagString(ExifInterface.TAG_GPS_LONGITUDE, exif); 
      myAttribute += getTagString(ExifInterface.TAG_GPS_LONGITUDE_REF, exif); 
      myAttribute += getTagString(ExifInterface.TAG_IMAGE_WIDTH, exif);
      myAttribute += getTagString(ExifInterface.TAG_IMAGE_LENGTH, exif);  
      myAttribute += getTagString(ExifInterface.TAG_MAKE, exif); 
      myAttribute += getTagString(ExifInterface.TAG_MODEL, exif); 
      myAttribute += getTagString(ExifInterface.TAG_ORIENTATION, exif); 
      myAttribute += getTagString(ExifInterface.TAG_WHITE_BALANCE, exif);
 
      myTextView.setText(myAttribute);      
      Log.d(TAG, "show--");
    } 
    
    private String getTagString(String tag, ExifInterface exif) 
    { 
      return(tag + " : " + exif.getAttribute(tag) + "\n"); 
    } 
    
    private void WriteExif()
    {
      Log.d(TAG, "write++");
      exif.setAttribute(ExifInterface.TAG_DATETIME, "20100705");
      exif.setAttribute(ExifInterface.TAG_FLASH, "YES");
      exif.setAttribute(ExifInterface.TAG_GPS_LATITUDE, "L01");
      exif.setAttribute(ExifInterface.TAG_GPS_LATITUDE_REF, "R01");
      exif.setAttribute(ExifInterface.TAG_GPS_LONGITUDE, "L02");
      exif.setAttribute(ExifInterface.TAG_GPS_LONGITUDE_REF, "R02");
      exif.setAttribute(ExifInterface.TAG_IMAGE_WIDTH, "800px");
      exif.setAttribute(ExifInterface.TAG_IMAGE_LENGTH, "600px");
      exif.setAttribute(ExifInterface.TAG_MAKE, "David Tai");
      exif.setAttribute(ExifInterface.TAG_MODEL, "Asus Phone");
      exif.setAttribute(ExifInterface.TAG_ORIENTATION, "no");
      exif.setAttribute(ExifInterface.TAG_WHITE_BALANCE, "AUTO");
      Log.d(TAG, "write--");
    }
}