如果你不想经历在每个活动清单条目中添加方向的麻烦，创建一个BaseActivity类(继承' activity '或'AppCompatActivity')，它将被你的应用程序的每个活动继承，而不是' activity '或'AppCompatActivity'，只需在你的BaseActivity中添加以下代码段:

@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setRequestedOrientation (ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
    // rest of your code......
}

将以下命令添加到您的项目中，

npm install

npm i react-native-orientation-locker

然后你使用一个manifest类， React_Native(你的项目文件夹)/ android / app / src / main / AndroidManifest.xml:

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
  package="com.payroll_react">

  <uses-permission android:name="android.permission.INTERNET" />
  <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW"/>

  <application
    android:name=".MainApplication"
    android:label="@string/app_name"
    android:icon="@mipmap/ic_launcher"
    android:allowBackup="false"
    android:theme="@style/AppTheme">
    <activity
      android:name=".MainActivity"
      android:label="@string/app_name"
      android:screenOrientation="landscape"
      android:configChanges="keyboard|keyboardHidden|orientation|screenSize"
      android:windowSoftInputMode="adjustResize">
      <intent-filter>
          <action android:name="android.intent.action.MAIN" />
          <category android:name="android.intent.category.LAUNCHER" />
      </intent-filter>
    </activity>
    <activity android:name="com.facebook.react.devsupport.DevSettingsActivity" />
  </application>

</manifest>

<android . . . >
    . . .
    <manifest . . . >
        . . .
        <application>
            <activity
                android:name=".MyActivity"
                android:screenOrientation="portrait"
                android:configChanges="keyboardHidden|orientation">
            </activity>
        </application>
    </manifest>
</android>

如果你想要用户设置，那么我建议setRequestedOrientation (ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);

您可以从设置菜单更改设置。

我需要这样做是因为我的计时器必须与屏幕上的内容相对应，旋转屏幕将破坏当前活动。

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="in.co.nurture.bajajfinserv">
    <uses-permission android:name="android.permission.INTERNET"></uses-permission>

    <application

        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity" android:screenOrientation="portrait">

            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>
</manifest>

我们可以使用属性或android:screenOrientation来限制活动在纵向或横向模式。

如果我们在程序中有多个活动，那么我们可以自由地限制任何模式下的任何一个活动，它不会影响你不想要的其他活动。

如何在一些视图中改变方向

不是锁定整个活动的方向，你可以使用这个类从你的任何视图中动态地锁定方向:

让你的视图成为景观

OrientationUtils.lockOrientationLandscape(mActivity);

将视图设置为竖屏

OrientationUtils.lockOrientationPortrait(mActivity);

解锁取向

OrientationUtils.unlockOrientation(mActivity);

方向Util类

import android.app.Activity;
import android.content.Context;
import android.content.pm.ActivityInfo;
import android.content.res.Configuration;
import android.os.Build;
import android.view.Surface;
import android.view.WindowManager;

/*  * This class is used to lock orientation of android app in nay android devices
 */

public class OrientationUtils {
    private OrientationUtils() {
    }

    /** Locks the device window in landscape mode. */
    public static void lockOrientationLandscape(Activity activity) {
        activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_SENSOR_LANDSCAPE);
    }

    /** Locks the device window in portrait mode. */
    public static void lockOrientationPortrait(Activity activity) {
        activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
    }

    /** Locks the device window in actual screen mode. */
    public static void lockOrientation(Activity activity) {
        final int orientation = activity.getResources().getConfiguration().orientation;
        final int rotation = ((WindowManager) activity.getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay()
                .getRotation();

        // Copied from Android docs, since we don't have these values in Froyo
        // 2.2
        int SCREEN_ORIENTATION_REVERSE_LANDSCAPE = 8;
        int SCREEN_ORIENTATION_REVERSE_PORTRAIT = 9;

        // Build.VERSION.SDK_INT <= Build.VERSION_CODES.FROYO
        if (!(Build.VERSION.SDK_INT <= Build.VERSION_CODES.FROYO)) {
            SCREEN_ORIENTATION_REVERSE_LANDSCAPE = ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE;
            SCREEN_ORIENTATION_REVERSE_PORTRAIT = ActivityInfo.SCREEN_ORIENTATION_PORTRAIT;
        }

        if (rotation == Surface.ROTATION_0 || rotation == Surface.ROTATION_90) {
            if (orientation == Configuration.ORIENTATION_PORTRAIT) {
                activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
            } else if (orientation == Configuration.ORIENTATION_LANDSCAPE) {
                activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
            }
        } else if (rotation == Surface.ROTATION_180 || rotation == Surface.ROTATION_270) {
            if (orientation == Configuration.ORIENTATION_PORTRAIT) {
                activity.setRequestedOrientation(SCREEN_ORIENTATION_REVERSE_PORTRAIT);
            } else if (orientation == Configuration.ORIENTATION_LANDSCAPE) {
                activity.setRequestedOrientation(SCREEN_ORIENTATION_REVERSE_LANDSCAPE);
            }
        }
    }

    /** Unlocks the device window in user defined screen mode. */
    public static void unlockOrientation(Activity activity) {
        activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_USER);
    }

}