单击 recyclerView 项目时未打开新片段

new Fragment is not opening when recyclerView item is clicked

我一直在尝试在点击时启动一个新的片段,我在互联网上发现是这样的,当点击方法被激怒但没有任何反应

public class PlacesRecyclerAdapter extends  
RecyclerView.Adapter<PlacesRecyclerAdapter.ViewHolder> implements View.OnClickListener{
//some code

@Override
public void onClick(View v) {
AppCompatActivity activity = (AppCompatActivity)  context;
TextView t = v.findViewById(R.id.placeName);
fragment = new DetailFragment(getCurrentPlace((String) t.getText()));
FragmentTransaction transaction = activity.getSupportFragmentManager().beginTransaction();
transaction.replace(R.id.tabItem, fragment);
transaction.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN);
transaction.addToBackStack(null);
transaction.commit();

}

//some code
 }

对于 getCurrentPLace(),它是一个 return 放置对象的方法,我已经用调试器检查过它,它按预期工作

这里是DetailFragment.class代码

public class DetailFragment extends Fragment {

private MainActivity.Place place;
TextView name;

public DetailFragment(MainActivity.Place place) {
this.place = place;
}

@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable 
                      Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.detail_place_fragment, container, false);

name.setText(place.getTitle());

return view;
}
}

这是 ID 为 R.id.tabItem

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"
android:id="@+id/tabItem"
android:layout_width="match_parent"
android:layout_height="match_parent">

<androidx.recyclerview.widget.RecyclerView
    android:id="@+id/placesRecycleView"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />

</androidx.constraintlayout.widget.ConstraintLayout>

PS: 我尝试了类似问题的解决方案,但没有任何效果。

一开始最好的方法是使用接口。

Interface onClick{
    void click();
}

并在 class 的构造函数中实现它:

class PlacesRecyclerAdapter(onClick click)...

并像

一样使用它
t.setOnClickListener{
  click.click();
}

并且当您在 activity 中定义适配器时,此方法(单击)实现并且您可以在 activity 而不是适配器

中定义它
fragment = new DetailFragment(getCurrentPlace((String) t.getText()));
FragmentTransaction transaction =    activity.getSupportFragmentManager().beginTransaction();
transaction.replace(R.id.tabItem, fragment);
transaction.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN);
transaction.addToBackStack(null);
transaction.commit();

但是避免这些问题的最好方法是使用导航组件。