Question

据说here和here使用ScreenOrientation = ScreenOrientation.Portrait可以强制锁定应用的方向：

[Activity(
    Label = "SomeApplication",
    MainLauncher = true,
    ConfigurationChanges = ConfigChanges.ScreenSize | ConfigChanges.Orientation,
    ScreenOrientation = ScreenOrientation.Portrait
)]
public class MainActivity : global::Xamarin.Forms.Platform.Android.FormsAppCompatActivity
{
    protected override void OnCreate(Bundle bundle)
    {
        TabLayoutResource = Resource.Layout.Tabbar;
        ToolbarResource = Resource.Layout.Toolbar;
        base.OnCreate(bundle);

        global::Xamarin.Forms.Forms.Init(this, bundle);
        LoadApplication(new App());
    }
}

还尝试像这样编辑AndroidManifest.xml：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" android:versionCode="1" android:versionName="1.0" package="com.package.SomeApplication">
    <uses-sdk android:minSdkVersion="15" />
    <application android:label="SomeApplication.Android">
        <activity
            android:name=".MainActivity"
            android:screenOrientation="portrait">
        </activity>
    </application>
</manifest>

和此：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" android:versionCode="1" android:versionName="1.0" package="com.package.SomeApplication">
    <uses-sdk android:minSdkVersion="15" />
    <application android:label="SomeApplication.Android">
    </application>
    <activity
          android:name=".MainActivity"
          android:screenOrientation="portrait">
    </activity>
</manifest>

但每次我运行应用程序时，我仍然可以在横向模式下旋转它。我的手机也启用了Auto-Rotate，但我认为这不是问题。

我还想念什么？

Answer 1

从MainActivity删除此代码，并仅在AndroidManifest.xml

中添加此代码

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.app">


<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:largeHeap="true"
    android:roundIcon="@mipmap/ic_launcher"
    android:supportsRtl="true"
    android:theme="@style/AppTheme">

      <activity
        android:name=".MainActivity"
        android:screenOrientation="portrait">
    </activity>

</application>

Answer 2

另一种方法是以编程方式设置方向：只需致电

this.RequestedOrientation = ScreenOrientation.Portrait; in OnResume()

将其设置为纵向模式

因为xamarin建议你先实施并失败的方式。 https://developer.xamarin.com/guides/xamarin-forms/user-interface/layouts/device-orientation/

无法将方向锁定为纵向

2 个答案: