Question

你已经看到了市面上那些相当便宜的安卓电视盒。它们通常跟着一个遥控器，它具有一些功能，如点击，滑动或向上和向下左右滑动。

最近我制作了一款应用并尝试使用遥控器进行导航。我在项目中有一些手势方法。我试图向左和向右滑动但是应用程序没有做任何事情，而当我在我的手机上尝试它有屏幕获取手势并做它应该做的事情。就像打开导航抽屉等一样。

现在我的问题是：是否需要使用speciel方法？是否有一些规则应该是商品？

修改这就是我到目前为止所做的。我创建了一个定义动作的课程：来自google.developer

    public class Dpad {
        public final static int UP = 0;
        public final static int LEFT = 1;
        public final static int RIGHT = 2;
        public final static int DOWN = 3;
        public final static int CENTER = 4;

        int directionPressed = -1; // initialized to -1

        public int getDirectionPressed(InputEvent event) {
            if (!isDpadDevice(event)) {
                return -1;
            }

            // If the input event is a MotionEvent, check its hat axis values.
            if (event instanceof MotionEvent) {

                // Use the hat axis value to find the D-pad direction
                MotionEvent motionEvent = (MotionEvent) event;
                float xaxis = motionEvent.getAxisValue(MotionEvent.AXIS_HAT_X);
                float yaxis = motionEvent.getAxisValue(MotionEvent.AXIS_HAT_Y);

                // Check if the AXIS_HAT_X value is -1 or 1, and set the D-pad
                // LEFT and RIGHT direction accordingly.
                if (Float.compare(xaxis, -1.0f) == 0) {
                    directionPressed = Dpad.LEFT;
                } else if (Float.compare(xaxis, 1.0f) == 0) {
                    directionPressed = Dpad.RIGHT;
                }
                // Check if the AXIS_HAT_Y value is -1 or 1, and set the D-pad
                // UP and DOWN direction accordingly.
                else if (Float.compare(yaxis, -1.0f) == 0) {
                    directionPressed = Dpad.UP;
                } else if (Float.compare(yaxis, 1.0f) == 0) {
                    directionPressed = Dpad.DOWN;
                }
            }

            // If the input event is a KeyEvent, check its key code.
            else if (event instanceof KeyEvent) {

                // Use the key code to find the D-pad direction.
                KeyEvent keyEvent = (KeyEvent) event;
                if (keyEvent.getKeyCode() == KeyEvent.KEYCODE_DPAD_LEFT) {
                    directionPressed = Dpad.LEFT;
                } else if (keyEvent.getKeyCode() == KeyEvent.KEYCODE_DPAD_RIGHT) {
                    directionPressed = Dpad.RIGHT;
                } else if (keyEvent.getKeyCode() == KeyEvent.KEYCODE_DPAD_UP) {
                    directionPressed = Dpad.UP;
                } else if (keyEvent.getKeyCode() == KeyEvent.KEYCODE_DPAD_DOWN) {
                    directionPressed = Dpad.DOWN;
                } else if (keyEvent.getKeyCode() == KeyEvent.KEYCODE_DPAD_CENTER) {
                    directionPressed = Dpad.CENTER;
                }
            }
            return directionPressed;
        }

        public static boolean isDpadDevice(InputEvent event) {
            // Check that input comes from a device with directional pads.
            if ((event.getSource() & InputDevice.SOURCE_DPAD)
                    != InputDevice.SOURCE_DPAD) {
                return true;
            } else {
                return false;
            }
        }
    }

在我的MainActivity中，我有一个导航器。我希望在远程控制D-pad想要它时打开和关闭

 mDrawerLayout.setOnGenericMotionListener(new View.OnGenericMotionListener() {
        @Override
        public boolean onGenericMotion(View view, MotionEvent motionEvent) {
            if (Dpad.isDpadDevice(motionEvent)) {
                int press = mDpad.getDirectionPressed(motionEvent);
                switch (press) {
                    case Dpad.RIGHT:
                        // Do something for UP direction press Open the drawer
                        mDrawerLayout.openDrawer(Gravity.START);
                        return true;
                    case Dpad.LEFT:

                        mDrawerLayout.closeDrawer(Gravity.START);
                        return true;

                }
            }
            return false;
        }
    });

在其中一个片段中，我有一个媒体播放器并使用D-pad up和D-pad down我改变视频。

    v.setOnGenericMotionListener(new View.OnGenericMotionListener() {
        @Override
        public boolean onGenericMotion(View view, MotionEvent motionEvent) {
            if (Dpad.isDpadDevice(motionEvent)) {
                int press = mDpad.getDirectionPressed(motionEvent);
                switch (press) {
                    case Dpad.UP:
                        // Do something for UP direction press
                        UP(); // Change the video to next
                        return true;
                    case Dpad.DOWN:
                        DOWN(); // Change the video the earlier on
                        return true;

                }
            }

            return false;
        }
    });

修改它＆＃39;现在成为一个问题，因为它没有对任何动作作出反应。我尝试使用物理键盘的模拟器，而不是一个动作发生。如果有人给我一个暗示，我会赞不绝口。我的意思是 enter image description here

下面图片中的这种遥控器

提前致谢

Answer 1

我认为Android Developer上的代码是错误的：

public static boolean isDpadDevice(InputEvent event) {
    // Check that input comes from a device with directional pads.
    if ((event.getSource() & InputDevice.SOURCE_DPAD)
         != InputDevice.SOURCE_DPAD) {
         return true;
     } else {
         return false;
     }
}

条件应该是“==”而不是“！=”，所以这是正确的：

    public static boolean isDpadDevice(InputEvent event) {
    // Check that input comes from a device with directional pads.
    if ((event.getSource() & InputDevice.SOURCE_DPAD)
         == InputDevice.SOURCE_DPAD) {
         return true;
     } else {
         return false;
     }
 }

Android系统。从遥控器

1 个答案: