图片与导航抽屉重叠

Question

我在前置摄像头预览（片段中）上有图片（一顶帽子），因此您可以在购买前试戴帽子。但问题是，当在此预览中我试图打开导航抽屉时，我的帽子与此抽屉重叠，前置摄像头位于导航抽屉下方。如何使图片（帽子）位于导航抽屉下方？

MirrorFragment.java：

public class MirrorFragment extends Fragment implements SurfaceHolder.Callback {

    private Camera camera = null;

    private SurfaceHolder cameraSurfaceHolder = null;
    private boolean previewing = false;
    private static int wid = 0, hgt = 0;
    private View cameraViewControl;
    private Button btnCapture;
    private Activity activity;

    public MirrorFragment() {
    }

    @Override
    public void onAttach(Context context) {
        super.onAttach(context);
        this.activity = (Activity) context;
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

        SurfaceView cameraSurfaceView;
        Display display;


        View view = inflater.inflate(R.layout.fragment_mirror, container, false);
        activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);

        int toolbarHeight = ((MainActivity) activity).getToolbar().getHeight();


        display = getActivity().getWindowManager().getDefaultDisplay();

        wid = display.getWidth();
        hgt = display.getHeight();


        activity.getWindow().setFormat(PixelFormat.TRANSLUCENT);
        activity.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);

        cameraSurfaceView = (SurfaceView) view.findViewById(R.id.cameraSurfaceViewFragment);
        cameraSurfaceHolder = cameraSurfaceView.getHolder();

        cameraSurfaceHolder.addCallback(this);

        cameraSurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);



        LayoutInflater layoutInflater = LayoutInflater.from(getActivity());

        RelativeLayout.LayoutParams layoutParamsControl = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT,
                RelativeLayout.LayoutParams.MATCH_PARENT);

        cameraViewControl = layoutInflater.inflate(R.layout.cambutton, null);

        btnCapture = (Button) cameraViewControl.findViewById(R.id.btnCapture);

        setMarginTopForHat(toolbarHeight);


        activity.addContentView(cameraViewControl, layoutParamsControl);

        return view;
    }




    public void setMarginTopForHat(int height) {
        LinearLayout.LayoutParams layoutParams = (LinearLayout.LayoutParams) btnCapture.getLayoutParams();
        layoutParams.setMargins(0, height + 30, 0, 0);
        btnCapture.setLayoutParams(layoutParams);
    }    


    @Override
    public void surfaceCreated(SurfaceHolder holder) {

        try {
            camera = Camera.open(1);
            camera.setDisplayOrientation(90);
        } catch (RuntimeException e) {
            Toast.makeText(getContext(), "Device camera is not working properly, please try after sometime.",
                    Toast.LENGTH_LONG).show();
        }
    }



    @Override
    public void surfaceDestroyed(SurfaceHolder holder) {

        ((ViewGroup) cameraViewControl.getParent()).removeView(cameraViewControl);
        camera.stopPreview();
        camera.release();
        camera = null;
        previewing = false;
    }
}

fragment_mirror.xml：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical">

    <SurfaceView
        android:id="@+id/cameraSurfaceViewFragment"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true" />

</RelativeLayout>

Answer 1

您的帽子View 出现在抽屉上方，因为您正在使用活动的addContentView() 方法，该方法将其添加为活动内容ViewGroup 中的最后一个子项，使其绘制在其余部分之上它的内容。如果您将MirrorFragment 加载到其中的ViewGroup 是FrameLayout，则可以将其添加到其中。但是，可能更可取的解决方案是将其直接添加到 fragment_mirror 布局中，可以通过编程方式，也可以在布局 XML 中。