Question

我有一个.xml文件（download_text_item.xml），其中包含一个TextView，用于在RecyclervIew中设置Text。

现在我需要一个带有TextView的第二个.xml文件（mirror_text_item.xml），它也应该可以在RecyclerView中访问，但我不知道如何在我的适配器中正确地对它进行充气，我制作了一个包含，它通过.xml但不是以编程方式工作。

<FrameLayout
   android:layout_height="wrap_content"
   android:layout_width="wrap_content"
   android:layout_below="@+id/mirrors">
<include layout="@layout/mirror_text_item"/>
</FrameLayout>

我也尝试使用DownloadAdapter中的container.addView但不知何故我无法正确使用。

mirror_text_item.xml：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/container"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@drawable/list_selector"
    android:clickable="true">

    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical">

        <TextView
            android:id="@+id/mir"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_centerVertical="true"
            android:maxLines="1"
            android:layout_marginTop="8dp"
            android:layout_marginBottom="8dp"
            android:layout_marginLeft="16dp"
            android:layout_marginRight="16dp"
            android:text="http://www.mirror.com"
            android:textColor="?attr/colorPrimary"
            android:textSize="16dp" />

    </RelativeLayout>

</RelativeLayout>

DownloadAdapter：

public class DownloadAdapter extends RecyclerView.Adapter<DownloadAdapter.ViewHolder> {

    String[] items;
    Fragment fragment;

    public DownloadAdapter(Fragment fragment, String[] items) {
        this.fragment = fragment;
        this.items = items;
    }

    @Override
    public DownloadAdapter.ViewHolder onCreateViewHolder(ViewGroup container, int viewType) {
        View a, v = null;
        if (viewType == 0)
            v = LayoutInflater.from(container.getContext()).inflate(R.layout.download_header_item, container, false);
        else
            v = LayoutInflater.from(container.getContext()).inflate(R.layout.download_text_item, container, false);

        //mirror_text_item.xml needs to be inflated here

        return new ViewHolder(v);
    }

    public String getSelection(int position) {
        return items[position];
    }

    @Override
    public int getItemViewType(int position) {
        return 1;
    }

    @Override
    public void onBindViewHolder(DownloadAdapter.ViewHolder holder, final int position) {
        final String item = Utils.unescapeJavaString(Html.fromHtml(getSelection(position)).toString());
        holder.text.setText(item);

        if (Utils.downloadVis == 1)
        holder.mir.setText("Just testing"); //Nullpointer Exception as not inflated

        holder.itemView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Utils.openUri(fragment, item);
            }
        });
    }

    @Override
    public int getItemCount() {
        return items.length;
    }

    class ViewHolder extends RecyclerView.ViewHolder {
        private TextView text, mir;
        private View itemView;

        public ViewHolder(View itemView) {
            super(itemView);
            text = (TextView) itemView.findViewById(R.id.text);
            mir = (TextView) itemView.findViewById(R.id.mir);
            this.itemView = itemView;
        }
    }
}

编辑：一切都适用于H Raval代码，除了Mirror Textview的文本，我想问题在于下面的代码：

@Override
    public DownloadAdapter.ViewHolder onCreateViewHolder(ViewGroup container, int viewType) {
        View a, v = null;
        if (viewType == 0)
            v = LayoutInflater.from(container.getContext()).inflate(R.layout.download_header_item, container, false);
        else {
            v = LayoutInflater.from(container.getContext()).inflate(R.layout.download_text_item, container, false);
            return new DownloadViewHolder(v);
        }
        if (Utils.downloadVis == 1) {
            v = LayoutInflater.from(container.getContext()).inflate(R.layout.mirror_text_item, container, false);
            return new MirrorViewHolder(v);
        }
        return new ViewHolder(v);
    }

Answer 1

在这里你去.....

 public class DownloadAdapter extends RecyclerView.Adapter<DownloadAdapter.ViewHolder> {

    String[] items;
    Fragment fragment;

    public DownloadAdapter(Fragment fragment, String[] items) {
        this.fragment = fragment;
        this.items = items;
    }

    @Override
    public DownloadAdapter.ViewHolder onCreateViewHolder(ViewGroup container, int viewType) {
        View a, v = null;
        if (viewType == 0)
            v = LayoutInflater.from(container.getContext()).inflate(R.layout.download_header_item, container, false);
        else
            v = LayoutInflater.from(container.getContext()).inflate(R.layout.download_text_item, container, false);

        //mirror_text_item.xml needs to be inflated here

        return new ViewHolder(v);
    }

    public String getSelection(int position) {
        return items[position];
    }

    @Override
    public int getItemViewType(int position) {
        return 1;
    }
 @Override
    public DownloadAdapter.ViewHolder onCreateViewHolder(ViewGroup container, int viewType) {
        View a, v = null;
        if((Utils.downloadVis == 1)){
            v = LayoutInflater.from(container.getContext()).inflate(R.layout.mirror_text_item, container, false);
            return new DownloadViewHolder(v);
        }else{
          v = LayoutInflater.from(container.getContext()).inflate(R.layout.download_text_item, container, false);
          return new MirrorViewHolder(v);
        }

    }

     @Override
    public void onBindViewHolder(DownloadAdapter.ViewHolder viewholder, final int position) {
        final String item = Utils.unescapeJavaString(Html.fromHtml(getSelection(position)).toString());

        if(viewholder instenceOf DownloadViewHolder){
            DownloadViewHolder holder = (DownloadViewHolder) viewholder;
            holder.textView.setText(item);

            holder.itemView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Utils.openUri(fragment, item);
            }
        });
        }else{
        MirrorViewHolder holder = (MirrorViewHolder) viewholder;
            holder.textView.setText(item);

            holder.itemView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Utils.openUri(fragment, item);
            }
        });

        }


    }

    @Override
    public int getItemCount() {
        return items.length;
    }

 class MirrorViewHolder extends RecyclerView.ViewHolder {
        private TextView textView;
        private View itemView;

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

            textView = (TextView) itemView.findViewById(R.id.mir);
            this.itemView = itemView;
        }
    }

    class DownloadViewHolder extends RecyclerView.ViewHolder {
        private TextView textView;
        private View itemView;

        public ViewHolder(View itemView) {
            super(itemView);
            textView = (TextView) itemView.findViewById(R.id.text);

            this.itemView = itemView;
        }
    }

Layoutinflater：扩展多个布局（xml）以访问TextViews

1 个答案: