我正在开发一个简单的应用程序,在主视图中我想显示一个卡片列表,其中显示关于提供者的不同信息。
例如:
所以我想做的是一个recycleview,由cardview项生成,但是当我尝试实现它时,我意识到我不知道onbindviewholder()方法做什么。
另一个问题是如何基于cardsview项创建recycle视图。
这是我代码的一部分:
myadapter.class类
package com.example.apaados;
import android.view.LayoutInflater;
import android.view.ViewGroup;
import android.widget.TextView;
import androidx.cardview.widget.CardView;
import androidx.recyclerview.widget.RecyclerView;
public class MyAdapter extends RecyclerView.Adapter<MyAdapter.MyViewHolder> {
private String[] mDataset;
// Provide a reference to the views for each data item
// Complex data items may need more than one view per item, and
// you provide access to all the views for a data item in a view holder
public static class MyViewHolder extends RecyclerView.ViewHolder {
// each data item is just a string in this case
public CardView textView;
public MyViewHolder(CardView v) {
super(v);
textView = v;
}
}
// Provide a suitable constructor (depends on the kind of dataset)
public MyAdapter(String[] myDataset) {
mDataset = myDataset;
}
// Create new views (invoked by the layout manager)
@Override
public MyAdapter.MyViewHolder onCreateViewHolder(ViewGroup parent,
int viewType) {
// create a new view
CardView v = (CardView) LayoutInflater.from(parent.getContext())
.inflate(R.layout.card_view_main_view, parent, false);
MyViewHolder vh = new MyViewHolder(v);
return vh;
}
// Replace the contents of a view (invoked by the layout manager)
@Override
public void onBindViewHolder(MyViewHolder holder, int position) {
// - get element from your dataset at this position
// - replace the contents of the view with that element
/******I don't know what i have to do here.*************/
holder.itemView.
}
// Return the size of your dataset (invoked by the layout manager)
@Override
public int getItemCount() {
return mDataset.length;
}
}
recycleview.xml文件
<?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"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainView">
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/recycleView"
android:scrollbars="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:layout_editor_absoluteX="174dp"
tools:layout_editor_absoluteY="152dp" >
<androidx.cardview.widget.CardView
<!-- HERE i WOULD LIKE TO RECOVER THE XML OF MY CARD VIEW -->
android:layout_width="match_parent"
android:layout_height="wrap_content"
</androidx.recyclerview.widget.RecyclerView>
</androidx.constraintlayout.widget.ConstraintLayout>
这是我的cardview xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent" android:layout_height="match_parent"
android:padding="16dp"
>
<androidx.cardview.widget.CardView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/cv"
>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="16dp"
>
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/photo_card"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginRight="16dp"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/txtTitulo_Card"
android:layout_toRightOf="@+id/txtDescripcion_Card"
android:layout_alignParentTop="true"
android:textSize="30sp"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/txtDescripcion_Card"
android:layout_toRightOf="@+id/photo_card"
android:layout_below="@+id/txtTitulo_Card"
/>
</RelativeLayout>
</androidx.cardview.widget.CardView>
</LinearLayout>
如果你知道一些cardview项目在recycleview中的实现示例,请提前感谢!
1条答案
按热度按时间cld4siwp1#
您必须在cardview文件中替换此代码