View.getLocationInWindow(int[] location)

一个控件在其父窗口中的坐标位置

View.getLocationOnScreen(int[] location)

一个控件在其整个屏幕上的坐标位置

getLocationInWindow是以B为原点的C的坐标

getLocationOnScreen以A为原点。

下面是getLocationOnScreen示例

start = (Button) findViewById(R.id.start);

		int []location=new int[2];

		start.getLocationOnScreen(location);

		int x=location[0];//获取当前位置的横坐标

		int y=location[1];//获取当前位置的纵坐标

下面是getLocationInWindow示例

start = (Button) findViewById(R.id.start);

		int []location=new int[2];

		start.getLocationInWindow(location);

		int x=location[0];//获取当前位置的横坐标

		int y=location[1];//获取当前位置的纵坐标

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 附上源代码

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View.getLocationInWindow(int[] location)

/**

     * <p>Computes the coordinates of this view in its window. The argument

     * must be an array of two integers. After the method returns, the array

     * contains the x and y location in that order.</p>

     *

     * @param location an array of two integers in which to hold the coordinates

     */

    public void getLocationInWindow(int[] location) {

        if (location == null || location.length < 2) {

            throw new IllegalArgumentException("location must be an array of two integers");

        }

        if (mAttachInfo == null) {

            // When the view is not attached to a window, this method does not make sense

            location[0] = location[1] = 0;

            return;

        }

        float[] position = mAttachInfo.mTmpTransformLocation;

        position[0] = position[1] = 0.0f;

        if (!hasIdentityMatrix()) {

            getMatrix().mapPoints(position);

        }

        position[0] += mLeft;

        position[1] += mTop;

        ViewParent viewParent = mParent;

        while (viewParent instanceof View) {

            final View view = (View) viewParent;

            position[0] -= view.mScrollX;

            position[1] -= view.mScrollY;

            if (!view.hasIdentityMatrix()) {

                view.getMatrix().mapPoints(position);

            }

            position[0] += view.mLeft;

            position[1] += view.mTop;

            viewParent = view.mParent;

         }

        if (viewParent instanceof ViewRootImpl) {

            // *cough*

            final ViewRootImpl vr = (ViewRootImpl) viewParent;

            position[1] -= vr.mCurScrollY;

        }

        location[0] = (int) (position[0] + 0.5f);

        location[1] = (int) (position[1] + 0.5f);

    }

View.getLocationOnScreen(int[]
location)

  /**

     * <p>Computes the coordinates of this view on the screen. The argument

     * must be an array of two integers. After the method returns, the array

     * contains the x and y location in that order.</p>

     *

     * @param location an array of two integers in which to hold the coordinates

     */

    public void getLocationOnScreen(int[] location) {

        getLocationInWindow(location);

        final AttachInfo info = mAttachInfo;

        if (info != null) {

            location[0] += info.mWindowLeft;

            location[1] += info.mWindowTop;

        }

    }