android.view.MotionEvent#TOOL_TYPE_STYLUS源码实例Demo

private static int actionToToolType(final W3CItemModel item) {
    if (item.parameters != null && item.parameters.pointerType != null) {
        switch (item.parameters.pointerType) {
            case POINTER_TYPE_MOUSE:
                return MotionEvent.TOOL_TYPE_MOUSE;
            case POINTER_TYPE_PEN:
                return MotionEvent.TOOL_TYPE_STYLUS;
            case POINTER_TYPE_TOUCH:
                return MotionEvent.TOOL_TYPE_FINGER;
            default:
                // use default
                break;
        }
    }
    return MotionEvent.TOOL_TYPE_FINGER;
}
 

private static MotionEvent.PointerProperties[] getPointerProperties(int inputDevice) {
  MotionEvent.PointerProperties[] pointerProperties = {new MotionEvent.PointerProperties()};
  pointerProperties[0].clear();
  pointerProperties[0].id = 0;
  switch (inputDevice) {
    case InputDevice.SOURCE_MOUSE:
      pointerProperties[0].toolType = MotionEvent.TOOL_TYPE_MOUSE;
      break;
    case InputDevice.SOURCE_STYLUS:
      pointerProperties[0].toolType = MotionEvent.TOOL_TYPE_STYLUS;
      break;
    case InputDevice.SOURCE_TOUCHSCREEN:
      pointerProperties[0].toolType = MotionEvent.TOOL_TYPE_FINGER;
      break;
    default:
      pointerProperties[0].toolType = MotionEvent.TOOL_TYPE_UNKNOWN;
      break;
  }
  return pointerProperties;
}
 

/**
 * Returns a human-readable string describing the type of touch that triggered a MotionEvent.
 */

private static String getTouchType(MotionEvent e){

    String touchTypeDescription = " ";
    int touchType = e.getToolType(0);

    switch (touchType) {
        case MotionEvent.TOOL_TYPE_FINGER:
            touchTypeDescription += "(finger)";
            break;
        case MotionEvent.TOOL_TYPE_STYLUS:
            touchTypeDescription += "(stylus, ";
            //Get some additional information about the stylus touch
            float stylusPressure = e.getPressure();
            touchTypeDescription += "pressure: " + stylusPressure;

            if(Build.VERSION.SDK_INT >= 21) {
                touchTypeDescription += ", buttons pressed: " + getButtonsPressed(e);
            }

            touchTypeDescription += ")";
            break;
        case MotionEvent.TOOL_TYPE_ERASER:
            touchTypeDescription += "(eraser)";
            break;
        case MotionEvent.TOOL_TYPE_MOUSE:
            touchTypeDescription += "(mouse)";
            break;
        default:
            touchTypeDescription += "(unknown tool)";
            break;
    }

    return touchTypeDescription;
}
 

private static void assertPointersCount(int toolType, int pointerIndex) {
    if (toolType == MotionEvent.TOOL_TYPE_MOUSE && pointerIndex > 0) {
        throw new ActionsParseException(
                String.format("No more that one simultaneous pointer is supported for %s %s",
                        PARAMETERS_KEY_POINTER_TYPE, POINTER_TYPE_MOUSE));
    }
    if (toolType == MotionEvent.TOOL_TYPE_STYLUS && pointerIndex > 0) {
        throw new ActionsParseException(
                String.format("No more that one simultaneous pointer is supported for %s %s",
                        PARAMETERS_KEY_POINTER_TYPE, POINTER_TYPE_PEN));
    }
}
 

private static int toolTypeToInputSource(final int toolType) {
    switch (toolType) {
        case MotionEvent.TOOL_TYPE_MOUSE:
            return InputDevice.SOURCE_MOUSE;
        case MotionEvent.TOOL_TYPE_STYLUS:
            return InputDevice.SOURCE_STYLUS;
        default:
            return InputDevice.SOURCE_TOUCHSCREEN;
    }
}
 

/**
 * Returns a human-readable string describing the type of touch that triggered a MotionEvent.
 */

private static String getTouchType(MotionEvent e){

    String touchTypeDescription = " ";
    int touchType = e.getToolType(0);

    switch (touchType) {
        case MotionEvent.TOOL_TYPE_FINGER:
            touchTypeDescription += "(finger)";
            break;
        case MotionEvent.TOOL_TYPE_STYLUS:
            touchTypeDescription += "(stylus, ";
            //Get some additional information about the stylus touch
            float stylusPressure = e.getPressure();
            touchTypeDescription += "pressure: " + stylusPressure;

            if(Build.VERSION.SDK_INT >= 21) {
                touchTypeDescription += ", buttons pressed: " + getButtonsPressed(e);
            }

            touchTypeDescription += ")";
            break;
        case MotionEvent.TOOL_TYPE_ERASER:
            touchTypeDescription += "(eraser)";
            break;
        case MotionEvent.TOOL_TYPE_MOUSE:
            touchTypeDescription += "(mouse)";
            break;
        default:
            touchTypeDescription += "(unknown tool)";
            break;
    }

    return touchTypeDescription;
}
 

/**
 * Identifies if the provided {@link MotionEvent} is a stylus with the primary stylus button
 * pressed.
 *
 * @param event The event to check.
 * @return Whether a stylus button press occurred.
 */
private static boolean isStylusButtonPressed(MotionEvent event) {
    return event.getToolType(0) == MotionEvent.TOOL_TYPE_STYLUS
            && ((event.getButtonState() & MotionEvent.BUTTON_SECONDARY)
                    == MotionEvent.BUTTON_SECONDARY);
}
 

/**
 * Identifies if the provided {@link MotionEvent} is a stylus with the primary stylus button
 * pressed.
 *
 * @param event The event to check.
 * @return Whether a stylus button press occurred.
 */
private static boolean isStylusButtonPressed(MotionEvent event) {
    return event.getToolType(0) == MotionEvent.TOOL_TYPE_STYLUS
            && ((event.getButtonState() & MotionEvent.BUTTON_SECONDARY)
                    == MotionEvent.BUTTON_SECONDARY);
}