surfaceView 위에 다른 레이아웃 보이게하려면 어떻게 해야하나요?

Question

자바코드를 

public class MainActivity extends AppCompatActivity {
    FrameLayout previewFrame;
   CameraSurfaceView cameraView;

    RelativeLayout iconLayout;
    ImageView icon01Image;
    ImageView icon02Image;

    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        previewFrame = (FrameLayout) findViewById(R.id.previewFrame);
        cameraView = new CameraSurfaceView(getApplicationContext());
        previewFrame.addView(cameraView);

        iconLayout = (RelativeLayout) findViewById(R.id.iconLayout);
        icon01Image = (ImageView) findViewById(R.id.icon01Image);
        icon02Image = (ImageView) findViewById(R.id.icon02Image);


        Button showButton = (Button) findViewById(R.id.button1);
        showButton.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                iconLayout.setVisibility(View.VISIBLE);

            }
        });

        Button hideButton = (Button) findViewById(R.id.button2);
        hideButton.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                iconLayout.setVisibility(View.INVISIBLE);

            }
        });

    }

이렇게 작성했는데 카메라 미리보기 화면위에 버튼을 눌러도 다른 레이아웃들이 켜지지가 않아요 어떻게 해야할까요...

Comments

activity_main.xml을 올려 주셔야 알 수 있을 듯 합니다.