獲取手機方向但將屏幕方向固定為縱向

Question

我想獲得手機方向，但將屏幕方向保持為縱向。 所以無論用戶把手機調成橫向還是縱向，視圖都保持不變，但我可以知道它是橫向還是縱向。

將活動設置為android:screenOrientation="portrait"將解決這兩個問題，但我無法通過以下方式檢測手機方向

public void onConfigurationChanged(Configuration newConfig) {
    switch (newConfig.orientation) {
    case Configuration.ORIENTATION_PORTRAIT:
        Toast.makeText(this, "Portrait", Toast.LENGTH_SHORT).show();
        break;
    case Configuration.ORIENTATION_LANDSCAPE:
        Toast.makeText(this, "Landscape", Toast.LENGTH_SHORT).show();
        break;
    default:
        break;
    }
}

有誰知道如何解決這個問題？

Answer 1

這是一個用於輕松管理屏幕方向更改的多用途類：

public class OrientationManager extends OrientationEventListener {

    public enum ScreenOrientation {
        REVERSED_LANDSCAPE, LANDSCAPE, PORTRAIT, REVERSED_PORTRAIT
    }

    public ScreenOrientation screenOrientation; 
    private OrientationListener listener;

    public OrientationManager(Context context, int rate, OrientationListener listener) {
        super(context, rate);
        setListener(listener);
    }

    public OrientationManager(Context context, int rate) {
        super(context, rate);
    }

    public OrientationManager(Context context) {
        super(context);
    }

    @Override
    public void onOrientationChanged(int orientation) {
        if (orientation == -1){
            return;
        }
        ScreenOrientation newOrientation;
        if (orientation >= 60 && orientation <= 140){
            newOrientation = ScreenOrientation.REVERSED_LANDSCAPE;
        } else if (orientation >= 140 && orientation <= 220) {
            newOrientation = ScreenOrientation.REVERSED_PORTRAIT;
        } else if (orientation >= 220 && orientation <= 300) {
            newOrientation = ScreenOrientation.LANDSCAPE;
        } else {
            newOrientation = ScreenOrientation.PORTRAIT;                    
        }
        if(newOrientation != screenOrientation){
            screenOrientation = newOrientation;
            if(listener != null){
                listener.onOrientationChange(screenOrientation);
            }           
        }
    }

    public void setListener(OrientationListener listener){
        this.listener = listener;
    }

    public ScreenOrientation getScreenOrientation(){
        return screenOrientation;
    }

    public interface OrientationListener {

        public void onOrientationChange(ScreenOrientation screenOrientation);
    }
}

這是更簡單、可重用的方式，您還可以獲得 REVERSE_LANDSCAPE 和 REVERSE_PORTRAIT 方向。

您必須實現 OrientationListener 以便僅在發生方向更改時收到通知。

不要忘記調用orientationManager.enable()開始方向跟蹤，然后調用orientationManager.disable()（這兩個方法繼承自OrientationEventListener類）

更新：用例示例

MyFragment extends Fragment implements OrientationListener {

    ...

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);

        orientationManager = new OrientationManager(getActivity(), SensorManager.SENSOR_DELAY_NORMAL, this);
        orientationManager.enable();        
    }

    @Override
    public void onOrientationChange(ScreenOrientation screenOrientation) {
        switch(screenOrientation){
            case PORTRAIT:
            case REVERSED_PORTRAIT:
                MainActivityBase.getInstance().setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
            break;
            case REVERSED_LANDSCAPE:
                MainActivityBase.getInstance().setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE);
            break;
            case LANDSCAPE:
                MainActivityBase.getInstance().setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
            break;
        }
    }
}

Answer 2

你能用加速度計滿足你的要求嗎？ 如果是這樣，也許像這樣（未經測試的）片段會適合您的目的。

SensorManager sensorManager = (SensorManager) this.getSystemService(Context.SENSOR_SERVICE);
        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) {
                // TODO Auto-generated method stub

            }
        }, sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER), SensorManager.SENSOR_DELAY_GAME);

Answer 3

我需要一個解決方案，該解決方案只能按需為我提供定位。 這個對我有用：

public class SensorOrientationChecker {

public final String TAG = getClass().getSimpleName();

int mOrientation = 0;
private SensorEventListener mSensorEventListener;
private SensorManager mSensorManager;

private static SensorOrientationChecker mInstance;

public static SensorOrientationChecker getInstance() {
    if (mInstance == null)
        mInstance = new SensorOrientationChecker();

    return mInstance;
}

private SensorOrientationChecker() {
    mSensorEventListener = new Listener();
    Context applicationContext = GlobalData.getInstance().getContext();
    mSensorManager = (SensorManager) applicationContext.getSystemService(Context.SENSOR_SERVICE);

}

/**
 * Call on activity onResume()
 */
public void onResume() {
    mSensorManager.registerListener(mSensorEventListener, mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER), SensorManager.SENSOR_DELAY_NORMAL);
}

/**
 * Call on activity onPause()
 */
public void onPause() {
    mSensorManager.unregisterListener(mSensorEventListener);
}

private class Listener implements SensorEventListener {

    @Override
    public void onSensorChanged(SensorEvent event) {
        float x = event.values[0];
        float y = event.values[1];

        if (x<5 && x>-5 && y > 5)
            mOrientation = 0;
        else if (x<-5 && y<5 && y>-5)
            mOrientation = 90;
        else if (x<5 && x>-5 && y<-5)
            mOrientation = 180;
        else if (x>5 && y<5 && y>-5)
            mOrientation = 270;

        //Log.e(TAG,"mOrientation="+mOrientation+"   ["+event.values[0]+","+event.values[1]+","+event.values[2]+"]");
                                                                       }

    @Override
    public void onAccuracyChanged(Sensor sensor, int accuracy) {

    }

}

public int getOrientation(){
    return mOrientation;
    }
}

Answer 4

如果您禁用屏幕方向更改，那么顯然永遠不會調用 onConfigurationChanged ...

我認為唯一的方法是使用加速度計傳感器，檢查此鏈接。

Answer 5

這比編寫一個全新的類要簡單得多：

 final OrientationEventListener orientationEventListener = new OrientationEventListener( getApplicationContext() ) {

  @Override
  public void onOrientationChanged( final int orientation ) {
    Log.i("", "orientation = " + orientation );
  }
};

orientationEventListener.enable();

Answer 6

要進入您想要在該活動的清單文件中設置的內容

android:configChanges="orientation|keyboardHidden"

然后當用戶旋轉手機時，它將進入 public void onConfigurationChanged() 方法。 也刪除

android:screenOrientation="portrait" 

來自同一個活動。

Answer 7

如果有人正在尋找該問題的 Webview/javascript 解決方案，下面可以做到這一點。

這將觸發窗口上的自定義“翻轉”事件，並帶有“額外參數”，因為 jquery 具有它們。 它還設置 window.flip，類似於 window.orientation：

$(window).on('flip',function(ev,angle,orientation) {
    console.log(angle,orientation);
    alert(window.flip);
});

---

if (window.DeviceOrientationEvent) {
    jQuery.flip = {
        debug       : false,
        interval    : 1000,
        checked     : false,
        betaflat    : 25,
        gammaflat   : 45,
        orientation : 'portrait-primary',
        angles      : {
            'portrait-primary'      : 0,
            'portrait-secondary'    : 0,
            'landscape-primary'     : 90,
            'landscape-secondary'   : -90       
        },
        timer       : null,
        check       : function(ev) {
            if (!this.checked) {
                var trigger=false;
                if (this.debug) console.log([ev.alpha,ev.beta,ev.gamma]);
                if (ev.beta>this.betaflat) {
                    // if beta is big its portrait
                    if (this.debug) console.log('beta portrait pri');
                    if (this.orientation!='portrait-primary') {
                        this.orientation='portrait-primary';
                        trigger=true;
                    }
                } else if (ev.beta<-this.betaflat) {
                    // if beta is big its portrait
                    if (this.debug) console.log('beta portrait sec');
                    if (this.orientation!='portrait-secondary') {
                        this.orientation='portrait-secondary';
                        trigger=true;
                    }
                } else if (ev.gamma>this.gammaflat) {

                    // else if gamma is big its landscape
                    if (this.debug) console.log('gamma landscape pri');
                    if (this.orientation!='landscape-primary') {
                        this.orientation='landscape-primary';
                        trigger=true;
                    }

                } else if (ev.gamma<-this.gammaflat) {

                    // else if gamma is big its landscape
                    if (this.debug) console.log('gamma landscape sec');
                    if (this.orientation!='landscape-secondary') {
                        this.orientation='landscape-secondary';
                        trigger=true;
                    }

                }
                if (trigger) {
                    if (this.debug) console.log('trigger flip');
                    window.flip = this.angles[this.orientation];
                    $(window).trigger('flip',[window.flip,this.orientation]);
                    this.checked=true;
                }
            }
        }
    }
    $(document).ready(function() {
        setInterval(function() {jQuery.flip.checked=false},jQuery.flip.interval);
        $(window).on('deviceorientation',function(ev) { jQuery.flip.check(ev.originalEvent) });
    });
} else {
    if (this.debug) console.log('DeviceOrientationEvent not supported');
}

jquery並不是真正需要的。 反正我有它需要。