在Activity的onCreate()中使用

setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);

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

只需在活动标记中添加此属性。

 android:screenOrientation="portrait"

Use:

android:configChanges="keyboardHidden|orientation"
android:screenOrientation="portrait" 

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>

只需在你的清单中添加这一行:

android:screenOrientation="portrait"

如:

<manifest
    package="com.example.speedtest"
    android:versionCode="1"
    android:versionName="1.0" >

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >

        <activity
            android:name="ComparisionActivity"
            android:label="@string/app_name"
            android:screenOrientation="portrait" >
        </activity>

    </application>

</manifest>