android中getX(),getY() 与getRawX(),getRawY()分析

[b]先看getX(),getY()源码解释

 /**
     * {@link #getX(int)} for the first pointer index (may be an
     * arbitrary pointer identifier).
     *
     * @see #AXIS_X
     */
    public final float getX() {
        return nativeGetAxisValue(mNativePtr, AXIS_X, 0, HISTORY_CURRENT);
    }

    /**
     * {@link #getY(int)} for the first pointer index (may be an
     * arbitrary pointer identifier).
     *
     * @see #AXIS_Y
     */
    public final float getY() {
        return nativeGetAxisValue(mNativePtr, AXIS_Y, 0, HISTORY_CURRENT);
    }

这个是相对于view的坐标距离
[b]再看GetRawX(),getRawY()源码解释

  /**
     * Returns the original raw X coordinate of this event.  For touch
     * events on the screen, this is the original location of the event
     * on the screen, before it had been adjusted for the containing window
     * and views.
     *
     * @see getX()
     * @see #AXIS_X
     */
    public final float getRawX() {
        return nativeGetRawAxisValue(mNativePtr, AXIS_X, 0, HISTORY_CURRENT);
    }

    /**
     * Returns the original raw Y coordinate of this event.  For touch
     * events on the screen, this is the original location of the event
     * on the screen, before it had been adjusted for the containing window
     * and views.
     *
     * @see getY()
     * @see #AXIS_Y
     */
    public final float getRawY() {
        return nativeGetRawAxisValue(mNativePtr, AXIS_Y, 0, HISTORY_CURRENT);
    }[/b]

从字面上可以大致看到是相对于设备屏幕。
详细参见图片