为每一个活动写这个到你的清单文件:

android:screenOrientation="portrait" 

类似于Graham Borland的答案……但是如果你不想的话，你似乎不需要创建Application类…只需在项目中创建一个Base Activity

public class BaseActivity extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_base);
    setRequestedOrientation (ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);

}

并且在你想使用Potrait Mode的地方扩展这个类而不是AppCompatActivity

public class your_activity extends BaseActivity {}

如果有人想知道，如何为整个应用程序做到这一点，而不必让所有活动都扩展Kotlin中的公共基类， 请看下面的例子:

class InteractiveStoryApplication: Application() {
override fun onCreate() {
    super.onCreate()
    registerActivityLifecycleCallbacks(object: ActivityLifecycleCallbacks {
        override fun onActivityCreated(activity: Activity?, savedInstanceState: Bundle?) {
            activity?.requestedOrientation = ActivityInfo.SCREEN_ORIENTATION_PORTRAIT
        }

        override fun onActivityPaused(activity: Activity?) {
        }

        override fun onActivityResumed(activity: Activity?) {
        }

        override fun onActivityDestroyed(activity: Activity?) {
        }

        override fun onActivitySaveInstanceState(activity: Activity?, outState: Bundle?) {
        }

        override fun onActivityStarted(activity: Activity?) {
        }

        override fun onActivityStopped(activity: Activity?) {
        }
    })
}
}

然后你必须像这样在AndroidManifest中添加你的公共基类:

<application android:allowBackup="true"
android:name=".InteractiveStoryApplication"

是的，您既可以通过编程方式做到这一点，也可以为您的所有活动创建一个所有活动都可以扩展的AbstractActivity。

public abstract class AbstractActivity extends Activity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setRequestedOrientation (ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
    }
}

这个抽象活动也可以用于全局菜单。

@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);
}

在Manifest文件中，你想在“肖像”中使用哪些活动，你必须在活动标签中写这些代码

  android:screenOrientation="portrait" 

像这样

android:图标= " @drawable /图标” android: name = " com.zemkoapps.hd.wallpaper.AndroidGridLayoutActivity " android: screenOrientation = "肖像" > 但如果你想在横屏中使用这段代码 android: screenOrientation = "风景"