11

我想在锁定的纵向模式下找到相机屏幕方向，我在我的片段类中使用相机并且我已经将我的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横向它正在改变，我需要设置仅在相机处于纵向模式时才可见的捕获按钮。谁能帮我在纵向模式下获得方向变化？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
}
4

3 回答 3

37

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);

    }

然后你想检测方向只需调用

SimpleOrientationListener mOrientationListener = new SimpleOrientationListener(
                context) {

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

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

                }
            }
        };
        mOrientationListener.enable();
于 2014-12-23T08:59:20.397 回答
0

你将不得不使用：

@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
    }
}

如果您希望在定向期间不重新创建您的活动，请使用

android:configChanges="orientation|keyboardHidden|screenSize"

如果您希望您的活动被迫保持纵向，那么您将不得不使用

在您想尝试的活动清单文件中android:screenOrientation="portrait"

希望能帮助到你！！！

于 2014-12-23T05:53:20.043 回答
0

当您的活动仅设置为纵向或横向特定并且您希望在方向更改时执行某些操作时，您可以实现方向更改值。

private OrientationEventListener orientationEventListener;

在你的类中初始化这个变量并在 onCreate 中实现它的监听器

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，供以后在活动其他单元中使用。

于 2019-10-16T06:54:18.420 回答