安卓：检测方向更改 [英] Android: Detect Orientation Changed

问题描述

我需要检测的方向变化在我的应用程序，但我不希望我的布局从纵向改为横向。 目前我使用了 OrientationEventListener 然而，检测的方位角度是不够的。欲检测用户从纵向改变为横向或反之亦然，这不只是检测是否取向角为90°或270版

我想要做同样的检测是在Android确实改变活动的orientantion。我试图重写 onConfigurationChanged 并检查是否orientantion是横向/纵向，但是这仍然改变我的活动布局到景观。

有没有一种方法使用onConfigurationChanged但强制布局留在肖像？
有另一种方式来检测orientantion变化，而无需使用 OrientationEventListener 。最后，我可以实现我自己的方向变化的算法，在此任何想法？它有什么东西比更复杂的，如果（90阈值＆LT; =取向＆LT; = 90 +阈值），我想检测用户是否做了完整的运动人像 - >横向或Landscape->人像

I need to detect an orientation change in my application, but I don't want my layout to be changed from portrait to landscape. Currently I'm using the OrientationEventListener however detecting the orientation angle is not enough. I want to detect that the user changed from portrait to landscape or viceversa, and that is not just detecting if the orientation angle is 90 or 270.

I want to do the same detection that the Android does to change the activity's orientantion. I tried overriding onConfigurationChanged and check if orientantion is landscape/portrait, however this still changes my activity layout to landscape.

Is there a way to use onConfigurationChanged but force the layout to stay in portrait?
Is there another way to detect orientantion change without using OrientationEventListener. Ultimately I can implement my own orientation changed algorithm, any ideas on this? It has to be something more complex than if(90-THRESHOLD <= orientation <= 90+THRESHOLD), I want to detect if the user made the complete movement Portrait->Landscape or Landscape->Portrait.

感谢您的帮助，
菲利普

Thanks for the help,
Filipe

推荐答案

好吧，试图使用Android API和不能够做什么，我需要后，我实现了我自己的算法，实际上它并不复杂： 我用了一个OrientationEventListener，如果方向是在4定位点计算（在我的code我只检测 LANDSCAPE_RIGHT 和 PORTRAIT_UP ：

Ok, after trying to use the Android API and not being able to do what I need, I implemented my own algorithm and actually it wasn't that complicated: I used a OrientationEventListener, and calculated if the orientation is in the 4 orientation points (in my code I only detect LANDSCAPE_RIGHT and PORTRAIT_UP:

orientationListener = new OrientationEventListener(context, SensorManager.SENSOR_DELAY_UI) {
        public void onOrientationChanged(int orientation) {
            if(canShow(orientation)){
                show();
            } else if(canDismiss(orientation)){
                dismiss();
            }
        }
    };

@Override
public void onResume(){
    super.onResume();
    orientationListener.enable();
}

@Override
public void onPause(){
    super.onPause();
    orientationListener.disable();
}

private boolean isLandscape(int orientation){
        return orientation >= (90 - THRESHOLD) && orientation <= (90 + THRESHOLD);
    }

private boolean isPortrait(int orientation){
    return (orientation >= (360 - THRESHOLD) && orientation <= 360) || (orientation >= 0 && orientation <= THRESHOLD);
}

public boolean canShow(int orientation){
    return !visible && isLandscape(orientation);
}

public boolean canDismiss(int orientation){
    return visible && !dismissing && isPortrait(orientation);
}

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