Android 屏幕顶部无意中出现的白线

Android 屏幕顶部无意中出现的白线,android,xml,android-studio,android-layout,Android,Xml,Android Studio,Android Layout,因此,我的问题是,当我在模拟器上运行代码时,布局顶部有一条白线,这在蓝图或预览中都看不到。以下是我的XML: <?xml version="1.0" encoding="utf-8"?> <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"

因此,我的问题是,当我在模拟器上运行代码时,布局顶部有一条白线,这在蓝图或预览中都看不到。以下是我的XML:

    <?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <androidx.coordinatorlayout.widget.CoordinatorLayout
        android:layout_width="match_parent"
        android:layout_height="112dp"
        android:background="#fe9f0f"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:text="Budapest"
            android:textColor="#fbf6f0"
            android:textSize="25sp"
            android:textStyle="bold"/>

    </androidx.coordinatorlayout.widget.CoordinatorLayout>


    <FrameLayout
        android:id="@+id/fragment_container"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_marginTop="112dp"
        android:layout_marginBottom="56dp"
        app:layout_constraintBottom_toTopOf="@+id/bottomNavigationView"
        app:layout_constraintTop_toTopOf="parent"
        tools:layout_editor_absoluteX="0dp" />

    <com.google.android.material.bottomnavigation.BottomNavigationView
        android:id="@+id/bottomNavigationView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="#fef7e1"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:menu="@menu/bottom_navigation" />
</androidx.constraintlayout.widget.ConstraintLayout>

将这些代码行添加到onCreate方法中以隐藏状态栏

if( Build.VERSION.SDK_INT  < 16){
    getWindow().setFlags( WindowManager.LayoutParams.FLAG_FULLSCREEN,
                          WindowManager.LayoutParams.FLAG_FULLSCREEN);
}else{
    getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN);
}
if(Build.VERSION.SDK\u INT<16){
getWindow().setFlags(WindowManager.LayoutParams.FLAG_全屏,
WindowManager.LayoutParams.FLAG(全屏);
}否则{
getWindow().getDecorView().SetSystemMivibility(视图、系统、用户界面、标志、全屏);
}