사진을 갤러리에서 받아오면서 그 사진의 exif 정보를 같이 받아오려합니다

Question

public class MainActivity extends Activity {
    TextView mView;
    final int REQ_CODE_SELECT_IMAGE=100;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mView = (TextView) findViewById(R.id.textview);
        Button picture = (Button) findViewById(R.id.Btn_Find);
        picture.setOnClickListener(new View.OnClickListener(){

            public void onClick(View v){  // 클릭하면 ACTION_PICK 연결로 기본 갤러리를 불러옵니다.

                Intent intent = new Intent(Intent.ACTION_PICK);
                intent.setType(android.provider.MediaStore.Images.Media.CONTENT_TYPE);
                intent.setData(android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
                startActivityForResult(intent, REQ_CODE_SELECT_IMAGE);
            }
        });
    }
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        Toast.makeText(getBaseContext(), "resultCode : "+resultCode,Toast.LENGTH_SHORT).show();

        if(requestCode == REQ_CODE_SELECT_IMAGE)
        {
            if(resultCode==Activity.RESULT_OK)
            {
                try {
                    //Uri에서 이미지 이름을 얻어온다.
                    String name_Str = getImageNameToUri(data.getData());

                    String filename = Environment.getExternalStorageDirectory()
                            .getPath() + name_Str;
                    try {
                        ExifInterface exif = new ExifInterface(filename);
                        getExif(exif);
                    } catch (IOException e) {
                        e.printStackTrace();
                        Toast.makeText(this, "Error!", Toast.LENGTH_LONG).show();
                    }
                    //이미지 데이터를 비트맵으로 받아온다.
                    Bitmap image_bitmap    = MediaStore.Images.Media.getBitmap(getContentResolver(), data.getData());
                    ImageView image = (ImageView)findViewById(R.id.SelectedImage);

                    //배치해놓은 ImageView에 set
                    image.setImageBitmap(image_bitmap);

                    Toast.makeText(getBaseContext(), "name_Str : "+name_Str , Toast.LENGTH_SHORT).show();

                } catch (FileNotFoundException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                } catch (Exception e)
                {
                    e.printStackTrace();
                }
            }
        }
    }

    public String getImageNameToUri(Uri data)
    {
        String[] proj = { MediaStore.Images.Media.DATA };
        Cursor cursor = managedQuery(data, proj, null, null, null);
        int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
        cursor.moveToFirst();
        String imgPath = cursor.getString(column_index);
        String imgName = imgPath.substring(imgPath.lastIndexOf("/")+1);
        return imgName;
    }
    private void getExif(ExifInterface exif) {

        String myAttribute = "[Exif information] \n\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_LENGTH, exif);
        myAttribute += getTagString(ExifInterface.TAG_IMAGE_WIDTH, 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);

        mView.setText(myAttribute);

    }

    private String getTagString(String tag, ExifInterface exif) {
        return (tag + " : " + exif.getAttribute(tag) + "\n");
    }

}
 
우선 코드를 이렇게 짰는데
String filename = Environment.getExternalStorageDirectory()
        .getPath() + name_Str;
try {
    ExifInterface exif = new ExifInterface(filename);
    getExif(exif);
} catch (IOException e) {
    e.printStackTrace();
    Toast.makeText(this, "Error!", Toast.LENGTH_LONG).show();
}
이부분에서 자꾸 에러토스트로 자꾸빠집니다...
사진이 이미지뷰에 띄워지면서 그밑에 exif정보들을 텍스트뷰로 띄우려면 어떻게 해야하죠????