private void deleteLatestPhoto() {
String[] projection = new String[] { MediaStore.Images.ImageColumns._ID,
MediaStore.Images.ImageColumns.DATE_TAKEN };
Cursor cursor = managedQuery(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, projection,
null, null, MediaStore.Images.ImageColumns.DATE_TAKEN + " DESC");
if (cursor != null) {
cursor.moveToFirst();
ContentResolver cr = mContext.getContentResolver();
cr.delete(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
BaseColumns._ID + "=" + cursor.getString(0), null);
}
}