android 拦截鼠标按键

获取鼠标按键代码：

            view.setOnGenericMotionListener(new OnGenericMotionListener() {

               @Override
               public boolean onGenericMotion(View v, MotionEvent event) {
                   // TODO Auto-generated method stub
                   int what = event.getButtonState();
                   //鼠标移动 0
                   //BUTTON_PRIMARY （鼠标左键） 1
                   //BUTTON_SECONDARY （鼠标右键） 8
                   //BUTTON_TERTIARY   （鼠标中键） 32
                   //BUTTON_BACK
                   //BUTTON_FORWARD
                   Log.d("debug","keyCode===777===="+event.getSource() + ":" + event.getToolType(0) + "::" +what); //8194 3
                   event.getToolType(0); //MotionEvent.TOOL_TYPE_MOUSE
               switch (what) {
                   case MotionEvent.BUTTON_PRIMARY:
                       Log.d("debug","keyCode=======" +what);
                       break;
                   case MotionEvent.BUTTON_TERTIARY:
                       Log.d("debug","keyCode========" +what);
                       break;
                   case MotionEvent.BUTTON_BACK://（鼠标右键）
                       Log.d("debug","keyCode======"+what );
                       break;
                   }
                   return false;
               }
           });

查看MotionEvent源码，说明如下：

   /**
     * Button constant: Primary button (left mouse button).
     *
     * This button constant is not set in response to simple touches with a finger
     * or stylus tip. The user must actually push a button.
     *
     * @see #getButtonState
     */
    public static final int BUTTON_PRIMARY = 1 << 0;

    /**
     * Button constant: Secondary button (right mouse button, stylus first button).
     *
     * @see #getButtonState
     */
    public static final int BUTTON_SECONDARY = 1 << 1;

    /**
     * Button constant: Tertiary button (middle mouse button, stylus second button).
     *
     * @see #getButtonState
     */
    public static final int BUTTON_TERTIARY = 1 << 2;

    /**
     * Button constant: Back button pressed (mouse back button).
     *

     * The system may send a {@link KeyEvent#KEYCODE_BACK} key press to the application
     * when this button is pressed.
     *

     *
     * @see #getButtonState
     */
    public static final int BUTTON_BACK = 1 << 3;

    /**
     * Button constant: Forward button pressed (mouse forward button).
     *

     * The system may send a {@link KeyEvent#KEYCODE_FORWARD} key press to the application
     * when this button is pressed.
     *

     *
     * @see #getButtonState
     */
    public static final int BUTTON_FORWARD = 1 << 4;

这里 1 << 4 表示 1向左移动4位，向左移动一位表示乘以2,向右移动表示除以2,因为1 为0001,左移三位为1000，为8,左移四位为10000,为16,

其他类似，如2<< 3 = 16

可以参考如下文章：

http://blog.csdn.net/shanpengfei77/article/details/8157493

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