Why isn't my code launching my camera application?

public static final String TAG = BibleVersesActivity.class.getSimpleName();

public static final int REQUEST_TAKE_PHOTO = 0;
public static final int REQUEST_TAKE_VIDEO = 1;
public static final int REQUEST_PICK_PHOTO = 2;
public static final int REQUEST_PICK_VIDEO = 3;

public static final int MEDIA_TYPE_IMAGE = 4;
public static final int MEDIA_TYPE_VIDEO = 5;





@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_bible_verses);
    ButterKnife.bind(this);



    }

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);

    if (resultCode == RESULT_OK) {

    }
    else if (resultCode != RESULT_CANCELED) {
        Toast.makeText(this, "Sorry, there was an error!", Toast.LENGTH_LONG).show();
    }
}

@OnClick(R.id.imageButton2)
void takePhoto() {
    Intent takePhotoIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
    startActivityForResult(takePhotoIntent, REQUEST_TAKE_PHOTO);
}