Question

如果我的recycler-view的适配器绑定了基本类型Arraylist（String），我的ViewHolders会正确填充，但如果我使用ArrayList的{{1}}引用类型（Person）它仅绑定ArrayList中的最后一项（仅填充一个视图）。

查看持有人

public class PasswordViewHolder extends RecyclerView.ViewHolder {

        TextView header;
        TextView content;


        public PasswordViewHolder(View itemView) {
            super(itemView);

            header = (TextView) itemView.findViewById(R.id.Header);
            content = (TextView) itemView.findViewById(R.id.content);

        }

        public void Bind(String title) {
             //Password currentPassword = Passwords.get(position);
            content.setText("xxxxxxx");
            header.setText(title);
        }

    }

适配器

public class PasswordAdapter extends RecyclerView.Adapter<PasswordAdapter.PasswordViewHolder> {


    private static final String TAG = PasswordAdapter.class.getSimpleName();

    private int mNumberItems;

    private ArrayList<Password> Passwords = new ArrayList<>();
   // private ArrayList<String> Strings = new ArrayList<>();

    public PasswordAdapter(ArrayList<Password> passwords) {

        // mNumberItems = Strings.size();
        //Strings = passwords;
        Passwords = passwords;
        mNumberItems = getPasswords().size();
    }


    @Override
    public PasswordViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {
        boolean shouldAttachToParentImmediately = false;
        LayoutInflater inflater = LayoutInflater.from(viewGroup.getContext());
        View view = inflater.inflate(R.layout.password_item, viewGroup, shouldAttachToParentImmediately);
        PasswordViewHolder viewHolder = new PasswordViewHolder(view);
        return viewHolder;


    }


    @Override
    public void onBindViewHolder(PasswordViewHolder holder, int position) {
         Log.d(TAG, "#" + position);
       // Password p = getPasswords().get(position);
       // String text = p.get_title();
        //holder.Bind(text);
        Password password = Passwords.get(position) ;
        holder.header.setText(password.get_title());
        holder.content.setText(password.get_category());
    }

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

    @Override
    public int getItemCount() {
        return mNumberItems;
    }

    public List<Password> getPasswords() {
        return Passwords;
    }

    public void setPasswords(ArrayList<Password> passwords) {
        Passwords = passwords;
        //Strings = passwords;
    }

  @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_password);
       // ArrayList<String> message = new ArrayList<String>();
        //message.add("FaceBook");
       // message.add("Tweeter");
        ArrayList<Password> Passwords = SetTestPasswords();

        passwordListRV = (RecyclerView) findViewById(R.id.passwordListView);
        LinearLayoutManager layoutManager = new LinearLayoutManager(this);
        passwordListRV.setHasFixedSize(true);
        passwordAdapter = new PasswordAdapter(Passwords);

        passwordListRV.setLayoutManager(layoutManager);



        passwordListRV.setAdapter(passwordAdapter);

        SetFLoatingButton();

    }

Password_Item.xml文件

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:padding="5sp">

    <android.support.v7.widget.CardView
        android:layout_height="wrap_content"
        android:layout_width="match_parent">
        <LinearLayout
            android:layout_width="match_parent"
            android:orientation="vertical"
            android:layout_height="wrap_content">

            <TextView
                android:id="@+id/Header"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textColor="@color/colorTertiary"
                android:textStyle="bold"
                android:text="@string/password_header"/>

            <TextView
                android:id="@+id/content"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center_vertical|start"
                android:fontFamily="monospace"
                android:textSize="20sp"
                android:text="@string/password_description"/>


        </LinearLayout>

     </android.support.v7.widget.CardView>

</FrameLayout>

Answer 1

尝试更改

@Override
public int getItemCount() {
    return mNumberItems;
}

到

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

也删除

passwordListRV.setHasFixedSize(true);

Recycler视图仅填充一个项目，其他视图持有者为空

1 个答案: