我有一個RecyclerView,它有一個自定義適配器,可以擴展rowLayout。每行包含一個CardView,並在其中包含一些文本和圖像作爲按鈕。特別是我有一個「喜歡」按鈕(ImageView
),目前只應該改變點擊imageResource。RecyclerView滾動進行更改
我可以在onBindViewHolder()
方法中設置onClicklistener
,它確實註冊了我點擊按鈕的時候,但它不僅改變了那個按鈕圖像,而且還改變了其他一些像按鈕,還有當我向下滾動然後再次起來第一個像按鈕有時得到重置。
這是我的適配器代碼。
public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> implements View.OnClickListener {
private ArrayList<WallPost> wallPosts;
@Override
public void onClick(View v) {
}
public static class ViewHolder extends RecyclerView.ViewHolder {
public View view;
public ViewHolder(View v) {
super(v);
view = v;
}
}
public MyAdapter(ArrayList<WallPost> wallPosts) {
this.wallPosts = wallPosts;
}
@Override
public MyAdapter.ViewHolder onCreateViewHolder(ViewGroup parent,
int viewType) {
View v = LayoutInflater.from(parent.getContext())
.inflate(R.layout.item_layout, parent, false);
ViewHolder vh = new ViewHolder(v);
return vh;
}
@Override
public void onBindViewHolder(ViewHolder holder, final int position) {
TextView name = (TextView) holder.view.findViewById(R.id.person_name);
TextView age = (TextView) holder.view.findViewById(R.id.person_age);
ImageView profile = (ImageView) holder.view.findViewById(R.id.person_photo);
TextView description = (TextView) holder.view.findViewById(R.id.description_text);
AppCompatImageView mainImage = (AppCompatImageView) holder.view.findViewById(R.id.main_image);
final ImageView likeButton = (ImageView) holder.view.findViewById(R.id.like_button);
name.setText(wallPosts.get(position).getName());
age.setText(wallPosts.get(position).getAge());
profile.setImageResource(wallPosts.get(position).getPhotoId());
description.setText(wallPosts.get(position).getDescription());
mainImage.setImageResource(wallPosts.get(position).getMainPhotoId());
likeButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
likeButton.setImageResource(R.drawable.favourite_red);
}
});
}
@Override
public int getItemCount() {
return wallPosts.size();
}
}
這裏是項目佈局
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView xmlns:card_view="http://schemas.android.com/apk/res-auto"
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/cv"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginBottom="10dp"
card_view:cardCornerRadius="5dp">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="8dp"
>
<de.hdodenhof.circleimageview.CircleImageView
android:layout_width="48dp"
android:layout_height="48dp"
android:id="@+id/person_photo"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginRight="16dp"
android:src="@drawable/placeholderprofilepic"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/person_name"
android:text="Name"
android:layout_toRightOf="@+id/person_photo"
android:layout_alignParentTop="true"
android:textSize="30sp"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/person_age"
android:text="19"
android:layout_toRightOf="@+id/person_photo"
android:layout_below="@+id/person_name"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/description_text"
android:text="This is the description of the image"
android:layout_below="@id/person_age"/>
<android.support.v7.widget.AppCompatImageView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/main_image"
android:src="@drawable/placeholderfoodimage"
android:layout_below="@+id/description_text"
android:elevation="4dp"/>
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/like_button"
android:src="@drawable/favoruite_hollow"
android:layout_marginTop="10dp"
android:layout_below="@+id/main_image"
/>
</RelativeLayout>
</android.support.v7.widget.CardView>
,請複製粘貼你的'item_layout.xml' 。 –
您認爲'RecyclerView'中的* recycler *代表什麼? –
@ShadabAnsari我編輯了帖子 – Conviley