protected void onActivityResult(int requestCode, int resultCode,Intent data) {
             if (resultCode == RESULT_OK) {
             Uri targetUri = data.getData();
             Bitmap bitmap = null;
             bitmap = BitmapFactory.decodeFile(getRealPathFromURI(targetUri));
                 //bitmap = BitmapFactory.decodeStream(getContentResolver().openInputStream(targetUri));
            addMarker(bitmap);
            }
}

public String getRealPathFromURI(Uri contentUri) {
    // can post image
    String [] proj={MediaStore.Images.Media.DATA};
    Cursor cursor = managedQuery( contentUri,
    proj, // Which columns to return
    null, // WHERE clause; which rows to return (all rows)
    null, // WHERE clause selection arguments (none)
    null); // Order-by clause (ascending by name)
    int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
    cursor.moveToFirst();
    return cursor.getString(column_index);
    }

09-29 21:28:35.960: E/AndroidRuntime(4746):
java.lang.RuntimeException: Failure delivering result ResultInfo
{who=null, request=1, result=-1, data=Intent
{ dat=content://media/external/images/media/3 }} to activity
{com.sit.augmented_reality/com.sit.augmented_reality.activity.Demo}:
java.lang.NullPointerException