安卓 : ImageVIew onTouch Drag is intercepted by ScrollView ontouch Event

Question

我在 ScrollView 中使用 ImageView Controller 。在实现和测试方面，我发现滚动总是覆盖 onTouch 事件而不是 imageView (dragImage)。

我尝试使用它来启用滚动

scv.setOnTouchListener(null);    

这将禁用

scv.setOnTouchListener( new OnTouchListener(){ 
    @Override
    public boolean onTouch(View v, MotionEvent event) {
        return true; 
    }
});

它显示了 dragImage 只拖动了一个非常小的 Action ，而不是自由地拖动到我想要的地方。你能告诉我当我触摸 ImageView 而不是 scrollView 时禁用滚动的更好方法吗？

下面是我的工作:

public static class PlaceholderFragment extends Fragment   {



private static final String ARG_SECTION_NUMBER = "section_number";

    /**
     * Returns a new instance of this fragment for the given section number.
     */
    public static PlaceholderFragment newInstance(int sectionNumber) {
        PlaceholderFragment fragment = new PlaceholderFragment();
        Bundle args = new Bundle();
        args.putInt(ARG_SECTION_NUMBER, sectionNumber);
        fragment.setArguments(args);            
        return fragment;
    }




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

        View  rootView = inflater.inflate(R.layout.frag_flight_bank, container, false);
        r1  = (RelativeLayout) rootView.findViewById(R.id.relativeLayouyt1);

        r2  = (RelativeLayout) rootView.findViewById(R.id.relativeLayouyt2);
        r3  = (RelativeLayout) rootView.findViewById(R.id.relativeLayouyt3);
        r4  = (RelativeLayout) rootView.findViewById(R.id.relativeLayouyt4);
        r5  = (RelativeLayout) rootView.findViewById(R.id.relativeLayouyt5);
        rTop  = (RelativeLayout) rootView.findViewById(R.id.rTop);

        scv = (ScrollView) rootView.findViewById(R.id.scrollView1);
        initialise(rootView);

        return rootView;
    }



    private void initialise(View rootView) {
        // TODO Auto-generated method stub

        tvCustom= (TextView) rootView.findViewById(R.id.ttvCustomize);
        tvRename= (TextView) rootView.findViewById(R.id.tvRename);
        tvNormal= (TextView) rootView.findViewById(R.id.tvNorma);
        tvExper= (TextView) rootView.findViewById(R.id.txExper);


    ...
            dragImage = (ImageView) rootView.findViewById(R.id.dragImage);
            //dragImage.setVisibility(View.GONE);

        dragImage.setOnTouchListener(new OnTouchListener(){
            private int _xDelta;
            private int _yDelta;
            @Override
            public boolean onTouch(View v, MotionEvent event) {
                final int X = (int) event.getRawX();
                final int Y = (int) event.getRawY();
                switch (event.getAction() & MotionEvent.ACTION_MASK) {
                case MotionEvent.ACTION_DOWN:
                    RelativeLayout.LayoutParams lParams =      (RelativeLayout.LayoutParams) dragImage
                    .getLayoutParams();

                    _xDelta = X - lParams.leftMargin;
                    _yDelta = Y - lParams.topMargin;
                    break;
                case MotionEvent.ACTION_UP:
                    break;
                case MotionEvent.ACTION_POINTER_DOWN:
                    break;
                case MotionEvent.ACTION_POINTER_UP:
                    break;
                case MotionEvent.ACTION_MOVE:
                    RelativeLayout.LayoutParams ParamsA = (RelativeLayout.LayoutParams) dragImage
                    .getLayoutParams();
                    ParamsA.leftMargin = X - _xDelta;
                    ParamsA.topMargin = Y - _yDelta;
                    ParamsA.rightMargin = -250;
                    ParamsA.bottomMargin = -250;

                    dragImage.setLayoutParams(ParamsA);
                    break;
                }
                return true;

            }

        });

解决方法:在开头插入 (onCreteView)

scv.setOnTouchListener(new View.OnTouchListener() 
        {
            public boolean onTouch(View p_v, MotionEvent p_event) 
            {
                dragImage.getParent().requestDisallowInterceptTouchEvent(false);
                //  We will have to follow above for all scrollable contents
                return false;
            }
        });

在setOnTouchListener中，onTouch方法:

v.getParent().requestDisallowInterceptTouchEvent(true);

Answer 1

将以下代码添加到您的 MotionEvent.ACTION_DOWN 和 MotionEvent.ACTION_MOVE 案例中应该可以解决您的问题:

dragImage.getParent().requestDisallowInterceptTouchEvent(true);