Question

我有一个地图视图，其上面有叠加项目。叠加项目在录制时会有一个动作。问题是当我使用捏缩放时如果我的手指恰好位于物品的某个位置，当我抬起它时，onTap（）被调用。我怎么能阻止这个？

谢谢，杰森

Answer 1

为overlayItem实现motioneventListener而不是当前的eventListener并检查指针计数

@Override
public boolean onTouchEvent(final MotionEvent event)
{
    if(event.getPointerCount() == 1)
    { 
     // do onTap stuff 
    }
}

Answer 2

这是我最终得到的解决方案如果对任何人有任何帮助：

    private static Method           GetPointCountMethod;
    private boolean                 mIsTouchMove    = false;

    private static boolean mTapable = true;

    static {
        // Check if the getPointerCount method is availabe (aka api level 5)
        try {
            GetPointCountMethod = MotionEvent.class.getMethod("getPointerCount");
            /* success, this is a newer device */
        }
        catch (NoSuchMethodException nsme) {
            /* failure, must be older device */
        }
    };

// Invoke the getPointCount Method if it exists
    private int getPointCount(MotionEvent event)
    {
        try {
            return (Integer) GetPointCountMethod.invoke(event);
        }
        catch (IllegalArgumentException e) {

            e.printStackTrace();
        }
        catch (IllegalAccessException e) {
            e.printStackTrace();
        }
        catch (InvocationTargetException e) {
            e.printStackTrace();
        }
        return -1;
    }


    @Override
    public boolean dispatchTouchEvent(MotionEvent event)
    {
        // Set the tappable to be only when the map is realy just tapped and not moved or zoomed
        if (event.getAction() == MotionEvent.ACTION_UP) {
            if (GetPointCountMethod != null) {
                if (getPointCount(event) == 1) {

                    if (mIsTouchMove) {
                        mIsTouchMove = false;
                    }
                    else {
                        mTapable  = true;
                        // Finaly - a Tap! : 
                    }
                }
            }
        }
        else if (event.getAction() == MotionEvent.ACTION_MOVE) {
            mTapable  = (false);
            mIsTouchMove = true;
        }
        // let the rest do their job
        return super.dispatchTouchEvent(event);
    }

仍然没有1.6的支持，这就是为什么这仍然是开放的等待，看看是否有办法在1.6中做到这一点

使用捏缩放时禁用onTap

2 个答案: