在config.xml中的<widget>下添加<preference name="orientation" value="portrait" />对我来说很有效。

(其他解决方案要么在我的设备上不起作用，要么在构建过程中被覆盖，要么在构建过程中给出了弃用错误。)

来自Android开发者指南:

"orientation" The screen orientation has changed — the user has rotated the device. Note: If your application targets API level 13 or higher (as declared by the minSdkVersion and targetSdkVersion attributes), then you should also declare the "screenSize" configuration, because it also changes when a device switches between portrait and landscape orientations. "screenSize" The current available screen size has changed. This represents a change in the currently available size, relative to the current aspect ratio, so will change when the user switches between landscape and portrait. However, if your application targets API level 12 or lower, then your activity always handles this configuration change itself (this configuration change does not restart your activity, even when running on an Android 3.2 or higher device). Added in API level 13.

所以，在AndroidManifest.xml文件中，我们可以放:

<activity
            android:name=".activities.role_activity.GeneralViewPagerActivity"
            android:label="@string/title_activity_general_view_pager"
            android:screenOrientation="portrait"
            android:configChanges="orientation|keyboardHidden|screenSize"
            >
        </activity> 

为每一个活动写这个到你的清单文件:

android:screenOrientation="portrait" 

Use:

android:screenOrientation="portrait" 

只需将这一行写在应用程序的清单文件中，在每个你想只显示在纵向模式的活动中。

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);


    //setting screen orientation locked so it will be acting as potrait
    setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LOCKED);
}

对于Xamarin用户:

如果你把你所有的活动扩展到一个BaseActivity，只需添加:

this.RequestedOrientation = ScreenOrientation.Portrait;

这样问题就解决了。如果你想要任何特定的活动在横向覆盖OnActivityCreated。为:

this.Activity.RequestedOrientation = ScreenOrientation.Landscape;