Question

我有一个 recyclerview ，我设计了一个在适配器中充气的行，我想抓住微调器的id来执行一些操作这是我无法做到的。这是我的 ApolloActivity.java ，我试图在我想要微调器的id的fab的 onClick（）中给注销器视图充气。

private List<ApolloPharmacyEntity> entity = null;
        private RecyclerView rv;
        private FloatingActionButton fab;
        Spinner spinner;
        @Override
        protected void onCreate(final Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            getSupportActionBar().setTitle("Apollo Pharmacy");
            setContentView(R.layout.activity_apollo);
            rv=(RecyclerView)findViewById(R.id.recyclerview2);
            Log.i("TAG","recycler view"+rv);
            RecyclerView.LayoutManager mLayoutManager = new LinearLayoutManager(getApplicationContext());

            fab = (FloatingActionButton) findViewById(R.id.fab);
            fab.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                     Context context=view.getContext();
                LayoutInflater inflater = null;
                inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
                 view= inflater.inflate(R.layout.apollopharmacy_listrow,null);
                spinner = (Spinner)view.findViewById(R.id.spinner);//this is becoming null

                    String Text = spinner.getSelectedItem().toString();
                    Log.i("TAG","spinnervalue"+spinner);

                    Intent intent = new Intent(Apollo.this, Cart.class);
                    startActivity(intent);
                }
            });

initializeData（）; initializeAdapter（）;

`

这是我的适配器

public static class EntityViewHolder extends RecyclerView.ViewHolder {

        TextView tabName;
        TextView gobacktomenutv;
        Spinner spinner;
        String[] itemCount = { "1", "2", "3", "4","5","6","7","8","10"};
        RelativeLayout addrl;
        Dialog dialog;

        EntityViewHolder( View itemView) {
            super(itemView);

            spinner = (Spinner)itemView.findViewById(R.id.spinner);
            tabName = (TextView)itemView.findViewById(R.id.textView4);


            ArrayAdapter aa = new ArrayAdapter(itemView.getContext(), android.R.layout.simple_spinner_dropdown_item, itemCount);
            aa.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
            spinner.setAdapter(aa);



        }
    }
    List<ApolloPharmacyEntity> details;

    ApolloPharmacyAdapter(List<ApolloPharmacyEntity> details){
        this.details = details;
    }
    @Override
    public ApolloPharmacyAdapter.EntityViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {
        View v = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.apollopharmacy_listrow, viewGroup, false);
        ApolloPharmacyAdapter.EntityViewHolder pvh = new ApolloPharmacyAdapter.EntityViewHolder(v);
        return pvh;
    }

    @Override
    public void onBindViewHolder(ApolloPharmacyAdapter.EntityViewHolder holder, int position) {
        holder.tabName.setText(details.get(position).getTabName());
    }

    @Override
    public int getItemCount() {
        return details.size();
    }

    @Override
    public void onAttachedToRecyclerView(RecyclerView recyclerView) {
        super.onAttachedToRecyclerView(recyclerView);
    }
}

apollopharmacy_listrow.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent" android:layout_height="wrap_content">
<RelativeLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:id="@+id/relativelayout3"
    android:paddingLeft="20dp"
    android:layout_below="@id/relativelayout2">
    <TextView
        android:text="ASPIRIN-250 mg"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="28sp"
        android:textColor="#224e6d"
        android:layout_marginTop="20dp"
        android:textStyle="bold"
        android:id="@+id/textView4" />
</RelativeLayout>
    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@id/relativelayout3"
        android:paddingTop="10dp"
        android:paddingLeft="30dp"
        >
        <TextView
            android:text="6 tab"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textColor="#224e6d"
            android:textSize="26sp"
            android:textStyle="bold"
            android:id="@+id/textView6" />
        <RelativeLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content">
            <View
                android:layout_width="90dp"
                android:layout_height="2dp"
                android:background="#c0c0c0"
                android:layout_marginTop="40dp"/>
        </RelativeLayout>

        <TextView
            android:text="1 STRIP"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textColor="#224e6d"
            android:layout_marginTop="50dp"
            android:textStyle="bold"
            android:textSize="26sp"
            android:id="@+id/textView7" />
        <RelativeLayout
            android:layout_width="100dp"
            android:layout_height="45dp"
            android:background="@drawable/add_rounded"
            android:id="@+id/relativeLayout"
            android:layout_marginBottom="15dp"
            android:layout_alignBottom="@+id/textView7"
            android:layout_alignParentEnd="true">
            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:id="@+id/Transfer"
                android:text="ADD"
                android:textSize="20sp"
                android:textColor="#FFFFFF"
                android:layout_centerVertical="true"
                android:layout_centerHorizontal="true" />
        </RelativeLayout>
    </RelativeLayout>
    <RelativeLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/relativelayout3"
        >
        <TextView
            android:text="₹"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="40dp"
            android:textSize="34sp"
            android:textColor="#82BCB4"
            android:layout_marginStart="200dp"
            android:id="@+id/textView8" />
        <TextView
            android:text="26"
            android:layout_width="wrap_content"
            android:layout_height="80sp"
            android:layout_marginTop="25dp"
            android:textSize="50sp"
            android:textColor="#224e6d"
            android:textStyle="bold|normal"
            android:layout_marginStart="230dp"
            android:id="@+id/textView9" />
        <Spinner
            android:layout_width="55dp"
            android:layout_height="55dp"
            android:background="@drawable/spinner_outline"
            android:id="@+id/spinner"
            android:layout_marginEnd="30dp"
            android:layout_alignBottom="@+id/textView8"
            android:layout_alignEnd="@+id/textView8"
            android:layout_marginBottom="9dp" />
    </RelativeLayout>
    <RelativeLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_alignParentStart="true">

        <ImageView
            android:layout_width="60dp"
            android:layout_height="60dp"
            android:src="@drawable/ic_star_border_black_24px"
            android:layout_marginTop="15dp"
            android:layout_marginEnd="12dp"
            android:id="@+id/imageView2"
            android:layout_alignParentTop="true"
            android:layout_alignParentEnd="true" />
    </RelativeLayout>

</RelativeLayout>

Answer 1

在您的 ApolloActivity.java 的onCreate()方法中，您尚未将ApolloPharmacyAdapter设置为您的RecyclerView。因此apollopharmacy_listrow.xml的布局不会膨胀。

请使用rv.setAdapter()

中的onCreate()方法

此外，如果没有找到listrow的详细信息，RecyclerView将不会给listrow充气。在onCreate（）中不能像这样使用微调器，因为根据RecyclerView中的行数，可能有多个Spinner实例。

您必须指定要从您的Activity中引用哪个微调器。

如果您通过向下一个Activity发送微调项来详细说明您想要实现的目标，我可以提供帮助。

如何从回收站视图中获取主活动中微调器的ID？

1 个答案: