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我使用android导航体系结构组件实现了对LoginFragment的条件导航。我现在面临的问题是，我想隐藏工具栏上的向上按钮，并在用户未登录时禁用任何应用内导航。

我希望能够通过一种活动的方法来实现这一点，其中“活动”像在android sunflower演示中一样设置应用内导航UI和navController，并且导航目标是“片段”。

我实现了此处描述的条件导航： 导航体系结构组件-登录屏幕

如何使用导航体系结构组件正确实现在登录屏幕上隐藏导航和向上按钮？

我的代码

Activity

class SwipeHandlerActivity : AppCompatActivity(R.layout.activity_swipe_handler){
    override fun onSaveInstanceState(outState: Bundle) {
        super.onSaveInstanceState(outState)
        outState.putBundle("Foo", findViewById<MotionLayout>(R.id.the_motion_layout).transitionState)
    }

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        savedInstanceState?.getBundle("Foo")?.let(findViewById<MotionLayout>(R.id.the_motion_layout)::setTransitionState)
    }
}

Layout

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.motion.widget.MotionLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    app:layoutDescription="@xml/activity_swipe_handler_scene"
    android:id="@+id/the_motion_layout"
    app:motionDebug="SHOW_ALL">

    <View
        android:id="@+id/touchAnchorView"
        android:background="#8309AC"
        android:layout_width="64dp"
        android:layout_height="64dp"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</androidx.constraintlayout.motion.widget.MotionLayout>

Scene

<?xml version="1.0" encoding="utf-8"?>
<MotionScene 
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:motion="http://schemas.android.com/apk/res-auto">

    <Transition
        motion:constraintSetEnd="@+id/end"
        motion:constraintSetStart="@id/start"
        motion:duration="1000">

        <OnSwipe
            motion:touchAnchorId="@id/imageView"
            motion:dragDirection="dragUp"
            motion:touchAnchorSide="top" />
    </Transition>

    <ConstraintSet android:id="@+id/start">
    </ConstraintSet>

    <ConstraintSet android:id="@+id/end">
        <Constraint
            android:layout_height="250dp"
            motion:layout_constraintStart_toStartOf="@+id/textView2"
            motion:layout_constraintEnd_toEndOf="@+id/textView2"
            android:layout_width="250dp"
            android:id="@+id/imageView"
            motion:layout_constraintBottom_toTopOf="@+id/textView2"
            android:layout_marginBottom="68dp" />
    </ConstraintSet>
</MotionScene>

观察到的行为 …

我正在查看将数据库添加到 elastic beanstalk python 文档，但按照步骤操作会导致以下错误

2023/05/07 14:06:36.847596 [ERROR] An error occurred during execution of command [app-deploy] - [InstallDependency]. Stop running the command. Error: fail to install dependencies with requirements.txt file with error Command /bin/sh -c /var/app/venv/staging-LQM1lest/bin/pip install -r requirements.txt failed with error exit status 1. Stderr:  error: subprocess-exited-with-error\n  \n  \xc3\x97 python setup.py egg_info did not run successfully.\n  \xe2\x94\x82 exit code: 1\n  \xe2\x95\xb0\xe2\x94\x80> [18 lines of output]\n      /bin/sh: line 1: mysql_config: command not found\n      /bin/sh: line 1: mariadb_config: …