导航栏在我搜索后不会进入最后一个位置

Question

>我已经实现了一个搜索栏，在获得结果后，我想使用模拟器的"X"图标或"后退"键退出导航栏，但导航栏没有转到最后一个位置 我该如何解决它？

应用程序问题的屏幕截图 -> https://i.stack.imgur.com/RWxsE.jpg

我用来清除状态的一些代码

public void getText(final View view( {

final SearchView sv = view.findViewById(R.id.searchView);
sv.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
@Override
public boolean onQueryTextSubmit(String query) {
if(query.length() >= 1){
userInput = query;
fetchData();
setAdapter(view);
sv.clearFocus();
view.requestFocus();
return true;
}
setUpView(view);
observeDataChange();
setAdapter(view);
sv.clearFocus();
return false;
}
@Override
public boolean onQueryTextChange(String newText) {
if(newText.length() >= 1){
userInput = newText;
fetchData();
setAdapter(view);
//sv.clearFocus();
view.requestFocus();
return true;
}
return false;
}
});
}

Answer 1

将activity_main.xml文件代码替换为以下内容

<?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"
android:id="@+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingTop="10dp">

<fragment
android:id="@+id/nav_host_fragment"
android:name="androidx.navigation.fragment.NavHostFragment"
android:layout_width="match_parent"
android:layout_height="0dp"
app:defaultNavHost="true"
app:layout_constraintBottom_toTopOf="@id/nav_view"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:navGraph="@navigation/mobile_navigation" />
<com.google.android.material.bottomnavigation.BottomNavigationView
android:id="@+id/nav_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="?android:attr/windowBackground"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:menu="@menu/bottom_nav_menu" />

</androidx.constraintlayout.widget.ConstraintLayout>

和fragment_dashboard.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"
android:background="@color/cardview_shadow_end_color"
tools:context=".MainActivity">
<TextView
android:id="@+id/text_dashboard"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginLeft="8dp"
android:layout_marginTop="0dp"
android:layout_marginEnd="0dp"
android:layout_marginRight="8dp"
android:textAlignment="center"
android:textSize="0sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />

<androidx.recyclerview.widget.RecyclerView
android:id="@+id/rv_of_photos"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginTop="5dp"
android:layout_marginEnd="4dp"
android:layout_marginRight="2dp"
android:background="@color/cardview_shadow_end_color"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.516"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.666" />
</androidx.constraintlayout.widget.ConstraintLayout>