我想通过onOptionsItemSelected访问菜单项，但从未调用过。我尝试了很多方法，并停止了该解决方案，但并没有帮助。
public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
Log.d(TAG, "onCreateView: ");
View view = inflater.inflate(R.layout.fragment_home, container, false);
ButterKnife.bind(this, view);
setUpRecyclerView();
setupAuthorsSelectionRV();
setUpToolbar();
HomeViewModel model = ViewModelProviders.of(this).get(HomeViewModel.class);
disposable = model.getSongs()
.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(songs -> {
((SongRVAdapter) songRV.getAdapter()).setSongList(songs);
songRV.getAdapter().notifyDataSetChanged();
Log.d(TAG, "UI updated! |Song list| - ");
}, throwable -> {
Toast.makeText(getContext(),
"An error occurred - " + throwable,
Toast.LENGTH_SHORT).show();
Log.e(TAG, "Error while loading songs:\n", throwable);
}, () -> Log.i(TAG, "Songs loaded!"));
setHasOptionsMenu(true);
return view;
}
@Override
public void onCreateOptionsMenu(@NonNull Menu menu, @NonNull MenuInflater inflater) {
inflater.inflate(R.menu.toolbar_menu, menu);
super.onCreateOptionsMenu(menu, inflater);
}
@Override
public boolean onOptionsItemSelected(@NonNull MenuItem item) {
Log.d(TAG, "onOptionsItemSelected: ");
if (item.getItemId() == R.id.searchBtn) {
Log.d(TAG, "onOptionsItemSelected: inside IF");
((SearchView) item.getActionView())
.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
@Override
public boolean onQueryTextSubmit(String query) {
Log.d(TAG, "onQueryTextSubmit: ");
Completable.fromAction(() -> adapter.filter(query))
.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(() -> songRV.getAdapter().notifyDataSetChanged());
return true;
}
@Override
public boolean onQueryTextChange(String newText) {
Log.d(TAG, "onQueryTextChange: ");
Completable.fromAction(() -> adapter.filter(newText))
.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(() -> songRV.getAdapter().notifyDataSetChanged());
return true;
}
});
return true;
}
return super.onOptionsItemSelected(item);
}
<?xml version="1.0" encoding="utf-8"?>
<androidx.coordinatorlayout.widget.CoordinatorLayout 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="@android:color/white"
tools:context=".ui.homescreen.HomeFragment">
<com.google.android.material.appbar.AppBarLayout
android:id="@+id/appBar"
style="@style/wideStyle"
android:background="@android:color/white">
<com.google.android.material.appbar.CollapsingToolbarLayout
android:id="@+id/collapsingToolbar"
android:layout_width="match_parent"
android:layout_height="200dp"
app:contentScrim="@android:color/transparent"
app:expandedTitleMarginBottom="70dp"
app:expandedTitleTextAppearance="@android:color/white"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<androidx.viewpager.widget.ViewPager
android:id="@+id/authorsSelectionsVP"
android:layout_width="wrap_content"
android:layout_height="100dp"
android:layout_marginTop="10dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@id/header" />
<TextView
android:id="@+id/header"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="10dp"
android:layout_marginTop="40dp"
android:ellipsize="end"
android:maxLines="1"
android:paddingBottom="5dp"
android:text="Авторская подборка"
android:textColor="@android:color/black"
android:textSize="25sp"
android:textStyle="bold"
app:layout_constraintBottom_toTopOf="@id/authorsSelectionsVP"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
</com.google.android.material.appbar.CollapsingToolbarLayout>
<androidx.appcompat.widget.Toolbar
android:id="@+id/toolBar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="@android:color/transparent" />
</com.google.android.material.appbar.AppBarLayout>
<androidx.core.widget.NestedScrollView
android:id="@+id/nestedScroll"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:clipToPadding="false"
android:paddingBottom="100dp"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@id/allSongsLabel">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="@+id/allSongsLabel"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingStart="15dp"
android:paddingBottom="12dp"
android:text="@string/all_songs"
android:textColor="@android:color/black"
android:textSize="20sp"
android:textStyle="bold"
app:layout_constraintBottom_toTopOf="@id/songRV"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/songRV"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_constraintTop_toBottomOf="@id/allSongsLabel"
tools:listitem="@layout/song_item" />
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.core.widget.NestedScrollView>
</androidx.coordinatorlayout.widget.CoordinatorLayout>
如果它支持我该怎么办？
答案 0 :(得分：0)
在您的片段onCreateView中添加：
setHasOptionsMenu(true);
在“活动”中，确保您的onOptionsItemSelected没有返回false ID上的R.id.searchBtn。