如何在Android的人像锁定屏幕中检测我的屏幕方向？

Question

我想在锁定的纵向方向模式下找到相机的屏幕方向，那么我正在片段类中使用相机，并且已经将屏幕方向设置为纵向，但是我面临的问题是，当我将相机从纵向转到使它的景观改变，我需要将拍摄按钮设置为仅在相机处于纵向模式时可见。 谁能帮我在人像模式下改变方向？ 下面是我的代码：

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

您可以为此使用OrientationEventListener。 这是自定义它的类。

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，您要检测方向的地方只需致电

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

您将必须使用：

@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
    }
}

如果您不希望在入职培训期间重新创建活动，请使用

android:configChanges="orientation|keyboardHidden|screenSize"

如果您想让自己的活动被迫保持肖像状态，则必须使用

在活动的清单文件中，您只需要尝试android:screenOrientation="portrait"

希望能帮助到你！！！

Answer 3

当您的活动设置为仅特定于纵向或横向并且您想要在方向更改时执行一些操作时，就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，供以后在其他单位的活动中使用。