Question

我想在锁定的纵向方向模式中找到相机屏幕方向，我在片段类中使用相机并且我已将屏幕方向设置为肖像，但我面临的问题是，当我转动相机时从纵向到横向它变化，我需要设置捕获按钮仅在相机处于纵向模式时可见。任何人都可以帮我在纵向模式下更改方向吗？以下是我的代码：

getActivity().setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);

sensorManager.registerListener(new SensorEventListener() {

    int orientation=-1;;

    @Override
    public void onSensorChanged(SensorEvent event) {
        if (event.values[1] < 6.5 && event.values[1] > -6.5) {
            if (orientation!=1) {
                Log.d("Sensor", "Landscape");
            }
            orientation = 1;
        } else {
            if (orientation!=0) {
                Log.d("Sensor", "Portrait");
            }
            orientation = 0;
        }
    }

    @Override
    public void onAccuracyChanged(Sensor sensor, int accuracy) {
    }
}, sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER), SensorManager.SENSOR_DELAY_GAME);

if (orientation == 0) {
    // capture button visisble
} else {
    // invisible
}

Answer 1

您可以使用OrientationEventListener。这是定制它的类。

public abstract class SimpleOrientationListener extends OrientationEventListener {

        public static final int CONFIGURATION_ORIENTATION_UNDEFINED = Configuration.ORIENTATION_UNDEFINED;
        private volatile int defaultScreenOrientation = CONFIGURATION_ORIENTATION_UNDEFINED;
        public int prevOrientation = OrientationEventListener.ORIENTATION_UNKNOWN;
        private Context ctx;
        private ReentrantLock lock = new ReentrantLock(true);

        public SimpleOrientationListener(Context context) {
            super(context);
            ctx = context;
        }

        public SimpleOrientationListener(Context context, int rate) {
            super(context, rate);
            ctx = context;
        }

        @Override
        public void onOrientationChanged(final int orientation) {
            int currentOrientation = OrientationEventListener.ORIENTATION_UNKNOWN;
            if (orientation >= 330 || orientation < 30) {
                currentOrientation = Surface.ROTATION_0;
            } else if (orientation >= 60 && orientation < 120) {
                currentOrientation = Surface.ROTATION_90;
            } else if (orientation >= 150 && orientation < 210) {
                currentOrientation = Surface.ROTATION_180;
            } else if (orientation >= 240 && orientation < 300) {
                currentOrientation = Surface.ROTATION_270;
            }

            if (prevOrientation != currentOrientation && orientation != OrientationEventListener.ORIENTATION_UNKNOWN) {
                prevOrientation = currentOrientation;
                if (currentOrientation != OrientationEventListener.ORIENTATION_UNKNOWN)
                    reportOrientationChanged(currentOrientation);
            }

        }

        private void reportOrientationChanged(final int currentOrientation) {

            int defaultOrientation = getDeviceDefaultOrientation();
            int orthogonalOrientation = defaultOrientation == Configuration.ORIENTATION_LANDSCAPE ? Configuration.ORIENTATION_PORTRAIT
                    : Configuration.ORIENTATION_LANDSCAPE;

            int toReportOrientation;

            if (currentOrientation == Surface.ROTATION_0 || currentOrientation == Surface.ROTATION_180)
                toReportOrientation = defaultOrientation;
            else
                toReportOrientation = orthogonalOrientation;

            onSimpleOrientationChanged(toReportOrientation);
        }

        /**
         * Must determine what is default device orientation (some tablets can have default landscape). Must be initialized when device orientation is defined.
         *
         * @return value of {@link Configuration#ORIENTATION_LANDSCAPE} or {@link Configuration#ORIENTATION_PORTRAIT}
         */
        private int getDeviceDefaultOrientation() {
            if (defaultScreenOrientation == CONFIGURATION_ORIENTATION_UNDEFINED) {
                lock.lock();
                defaultScreenOrientation = initDeviceDefaultOrientation(ctx);
                lock.unlock();
            }
            return defaultScreenOrientation;
        }

        /**
         * Provides device default orientation
         *
         * @return value of {@link Configuration#ORIENTATION_LANDSCAPE} or {@link Configuration#ORIENTATION_PORTRAIT}
         */
        private int initDeviceDefaultOrientation(Context context) {

            WindowManager windowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
            Configuration config = context.getResources().getConfiguration();
            int rotation = windowManager.getDefaultDisplay().getRotation();

            boolean isLand = config.orientation == Configuration.ORIENTATION_LANDSCAPE;
            boolean isDefaultAxis = rotation == Surface.ROTATION_0 || rotation == Surface.ROTATION_180;

            int result = CONFIGURATION_ORIENTATION_UNDEFINED;
            if ((isDefaultAxis && isLand) || (!isDefaultAxis && !isLand)) {
                result = Configuration.ORIENTATION_LANDSCAPE;
            } else {
                result = Configuration.ORIENTATION_PORTRAIT;
            }
            return result;
        }

        /**
         * Fires when orientation changes from landscape to portrait and vice versa.
         *
         * @param orientation value of {@link Configuration#ORIENTATION_LANDSCAPE} or {@link Configuration#ORIENTATION_PORTRAIT}
         */
        public abstract void onSimpleOrientationChanged(int orientation);

    }

然后，您想要检测方向，只需致电

SimpleOrientationListener mOrientationListener = new SimpleOrientationListener(
                context) {

            @Override
            public void onSimpleOrientationChanged(int orientation) {
                if(orientation == Configuration.ORIENTATION_LANDSCAPE){

                }else if(orientation == Configuration.ORIENTATION_PORTRAIT){

                }
            }
        };
        mOrientationListener.enable();

Answer 2

你必须使用：

@Override
public void onConfigurationChanged(Configuration newConfig) {
    super.onConfigurationChanged(newConfig);


    if (newConfig.orientation == Configuration.ORIENTATION_LANDSCAPE) {

    } else if (newConfig.orientation == Configuration.ORIENTATION_PORTRAIT){
        //do your stuff with the button
    }
}

如果您希望在定位期间不重新创建活动，请使用

android:configChanges="orientation|keyboardHidden|screenSize"

如果您希望您的活动被迫保持肖像，那么您将不得不使用

在活动中的清单文件中，您只需尝试android:screenOrientation="portrait"

希望它有所帮助!!!

Answer 3

当您的活动仅设置为“纵向”或“横向”时，并且您希望在方向更改时执行一些操作，则可以实现方向更改值。

private OrientationEventListener orientationEventListener;

在您的类中初始化此变量，并在onCreate中实现它的侦听器

orientationEventListener = new OrientationEventListener(this) {
        @Override
        public void onOrientationChanged(int orientation) {

            Log.d("Orientation", orientation + " - " + currentOrientation);

            if (orientation >= 330 || orientation < 30) {
                currentOrientation = Surface.ROTATION_0;

            } else if (orientation >= 60 && orientation < 120) {
                currentOrientation = Surface.ROTATION_90;

            } else if (orientation >= 150 && orientation < 210) {
                currentOrientation = Surface.ROTATION_180;

            } else if (orientation >= 240 && orientation < 300) {
                currentOrientation = Surface.ROTATION_270;

            }
        }
    };

currentOrentation是整数值，以后可在其他单位的活动中使用。

如何在Android中的纵向锁定屏幕中检测我的屏幕方向？

3 个答案: