Java 单击按钮可使用鼠标滚动工作设置GenericMotionListener事件

先生， 我正在使用按钮键，它会显示一些值，例如：5，如果我将鼠标光标指向按钮，然后，在使用鼠标滚动的setOnGenericMotionListener事件上，Eg:5根据鼠标滚动的不同来增加和减少值，但现在我想移动鼠标光标点的任何位置，需要使用鼠标滚动事件设置setOnGenericMotionListener事件来处理特定按钮如何执行此事件

活动

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您不应使用此方法检测触摸事件。 在View.onGenericmotionEvent描述中：

    /**
     * Implement this method to handle generic motion events.
     * <p>
     * Generic motion events describe joystick movements, mouse hovers, track pad
     * touches, scroll wheel movements and other input events.  The
     * {@link MotionEvent#getSource() source} of the motion event specifies
     * the class of input that was received.  Implementations of this method
     * must examine the bits in the source before processing the event.
     * The following code example shows how this is done.
     * </p><p>
     * Generic motion events with source class {@link InputDevice#SOURCE_CLASS_POINTER}
     * are delivered to the view under the pointer.  All other generic motion events are
     * delivered to the focused view.
     * </p>
     * <pre> public boolean onGenericMotionEvent(MotionEvent event) {
     *     if (event.isFromSource(InputDevice.SOURCE_CLASS_JOYSTICK)) {
     *         if (event.getAction() == MotionEvent.ACTION_MOVE) {
     *             // process the joystick movement...
     *             return true;
     *         }
     *     }
     *     if (event.isFromSource(InputDevice.SOURCE_CLASS_POINTER)) {
     *         switch (event.getAction()) {
     *             case MotionEvent.ACTION_HOVER_MOVE:
     *                 // process the mouse hover movement...
     *                 return true;
     *             case MotionEvent.ACTION_SCROLL:
     *                 // process the scroll wheel movement...
     *                 return true;
     *         }
     *     }
     *     return super.onGenericMotionEvent(event);
     * }</pre>
     *
     * @param event The generic motion event being processed.
     * @return True if the event was handled, false otherwise.
     */
    public boolean onGenericMotionEvent(MotionEvent event) {
        return false;
    }

/**
*实现此方法以处理一般运动事件。
*
*通用运动事件描述操纵杆运动、鼠标悬停、轨迹板
*触摸、滚轮移动和其他输入事件。这个
*运动事件的{@link MotionEvent#getSource（）source}指定
*接收到的输入的类别。此方法的实现
*必须在处理事件之前检查源中的位。
*下面的代码示例演示了如何实现这一点。
*

*源类为{@link InputDevice#源类为(指针)的通用运动事件
*被传递到指针下的视图。所有其他通用运动事件都是
*交付给焦点视图。
*

*公共布尔onGenericMotionEvent（运动事件）{
*if（event.isFromSource（InputDevice.SOURCE\u CLASS\u操纵杆））{
*if（event.getAction（）==MotionEvent.ACTION\u MOVE）{
*//处理操纵杆移动。。。
*返回true；
*         }
*     }
*if（event.isFromSource（InputDevice.SOURCE\u CLASS\u指针））{
*开关（event.getAction（））{
*case MotionEvent.ACTION\u HOVER\u MOVE：
*//处理鼠标悬停移动。。。
*返回true；
*case MotionEvent.ACTION\u滚动：
*//处理滚轮移动。。。
*返回true；
*         }
*     }
*返回super.onGenericMotionEvent（事件）；
* }
*
*@param event正在处理的通用运动事件。
*@如果事件已处理，则返回True，否则返回false。
*/
公共布尔onGenericMotionEvent（运动事件）{
返回false；
}

您可以找到此方法的一些使用案例

顺便说一句，你应该使用

手势检测器来处理你的手势

    /**
     * Implement this method to handle generic motion events.
     * <p>
     * Generic motion events describe joystick movements, mouse hovers, track pad
     * touches, scroll wheel movements and other input events.  The
     * {@link MotionEvent#getSource() source} of the motion event specifies
     * the class of input that was received.  Implementations of this method
     * must examine the bits in the source before processing the event.
     * The following code example shows how this is done.
     * </p><p>
     * Generic motion events with source class {@link InputDevice#SOURCE_CLASS_POINTER}
     * are delivered to the view under the pointer.  All other generic motion events are
     * delivered to the focused view.
     * </p>
     * <pre> public boolean onGenericMotionEvent(MotionEvent event) {
     *     if (event.isFromSource(InputDevice.SOURCE_CLASS_JOYSTICK)) {
     *         if (event.getAction() == MotionEvent.ACTION_MOVE) {
     *             // process the joystick movement...
     *             return true;
     *         }
     *     }
     *     if (event.isFromSource(InputDevice.SOURCE_CLASS_POINTER)) {
     *         switch (event.getAction()) {
     *             case MotionEvent.ACTION_HOVER_MOVE:
     *                 // process the mouse hover movement...
     *                 return true;
     *             case MotionEvent.ACTION_SCROLL:
     *                 // process the scroll wheel movement...
     *                 return true;
     *         }
     *     }
     *     return super.onGenericMotionEvent(event);
     * }</pre>
     *
     * @param event The generic motion event being processed.
     * @return True if the event was handled, false otherwise.
     */
    public boolean onGenericMotionEvent(MotionEvent event) {
        return false;
    }