public class RecyclerViewActivity extends ActivityBase{
ActivityRecyclerviewBinding recyclerviewBinding;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
recyclerviewBinding = ActivityRecyclerviewBinding.inflate(getLayoutInflater());
setContentView(recyclerviewBinding.getRoot());
LinearLayoutManager llManager = new LinearLayoutManager(this);
//默认垂直展示，这里设置为水平显示
llManager.setOrientation(LinearLayoutManager.HORIZONTAL);
//设置 RecyclerView 的布局管理器
recyclerviewBinding.rvUserinfo.setLayoutManager(llManager);
List userList = new ArrayList<>();
userList.add(new UserInfo("苏妲己", R.mipmap.scc_1));
...
userList.add(new UserInfo("王昭君", R.mipmap.scc_7));
BaseRecyclerAdapter adapter = new BaseRecyclerAdapter(this,userList) {
@Override
public int getItemLayoutId(int viewType) {
return R.layout.item_rv_userinfo;
}
@Override
public void convert(RecyclerViewHolder holder, int position, UserInfo bean) {
holder.setText(R.id.tv_name,bean.getName());
holder.setText(R.id.tv_content,bean.getContent());
holder.setImageResource(R.id.iv_head,bean.getHead());
}
};
//设置 RecyclerView 的数据适配器。
recyclerviewBinding.rvUserinfo.setAdapter(adapter);
//addItemDecoration
recyclerviewBinding.rvUserinfo.addItemDecoration(new RvDividerItemDecoration(this,10));
}
}
activity_recyclerview.xml
<RelativeLayout xmlns:android="schemas.android.com/apk/res/and…"
android:layout_width="match_parent"
android:layout_height="match_parent">
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/rv_userinfo"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
item_rv_userinfo.xml
<RelativeLayout xmlns:android="schemas.android.com/apk/res/and…"
android:layout_width="wrap_content"
android:layout_height="match_parent">
<ImageView
android:id="@+id/iv_head"
.../>
<TextView
android:id="@+id/tv_name"
.../>
<TextView
android:id="@+id/tv_content"
.../>
BaseRecyclerAdapter
public abstract class BaseRecyclerAdapter extends RecyclerView.Adapter {
protected final List mData;
protected final Context mContext;
protected LayoutInflater mInflater;
private OnItemClickListener mClickListener;
private OnItemLongClickListener mLongClickListener;
public BaseRecyclerAdapter(Context ctx, List list) {
mData = (list != null) ? list : new ArrayList();
mContext = ctx;
mInflater = LayoutInflater.from(ctx);
}
@Override
public RecyclerViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
创建一个新视图，该视图定义item的UI
final RecyclerViewHolder holder = new RecyclerViewHolder(mContext,
mInflater.inflate(getItemLayoutId(viewType), parent, false));
if (mClickListener != null) {
holder.itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mClickListener.onItemClick(holder.itemView, holder.getLayoutPosition());
}
});
}
if (mLongClickListener != null) {
holder.itemView.setOnLongClickListener(new View.OnLongClickListener() {
@Override
public boolean onLongClick(View v) {
mLongClickListener.onItemLongClick(holder.itemView, holder.getLayoutPosition());
return true;
}
});
}
return holder;
}
@Override
public void onBindViewHolder(RecyclerViewHolder holder, int position) {
convert(holder, position, mData.get(position));
}
@Override
public int getItemCount() {
return mData.size();
}
public void add(int pos, T item) {
mData.add(pos, item);
notifyItemInserted(pos);
}
public void delete(int pos) {
mData.remove(pos);
notifyItemRemoved(pos);
}
public void setOnItemClickListener(OnItemClickListener listener) {
mClickListener = listener;
}
public void setOnItemLongClickListener(OnItemLongClickListener listener) {
mLongClickListener = listener;
}
abstract public int getItemLayoutId(int viewType);
abstract public void convert(RecyclerViewHolder holder, int position, T bean);
public interface OnItemClickListener {
public void onItemClick(View itemView, int pos);
}
public interface OnItemLongClickListener {
public void onItemLongClick(View itemView, int pos);
}
}
RecyclerViewHolder
public class RecyclerViewHolder extends RecyclerView.ViewHolder {
private SparseArray mViews;//集合类，layout里包含的View,以view的id作为key，value是view对象
private Context mContext;//上下文对象
public RecyclerViewHolder(Context ctx, View itemView) {
super(itemView);
mContext = ctx;
mViews = new SparseArray();
}
private <T extends View> T findViewById(int viewId) {
View view = mViews.get(viewId);
if (view == null) {
view = itemView.findViewById(viewId);
mViews.put(viewId, view);
}
return (T) view;
}
public View getView(int viewId) {
return findViewById(viewId);
}
public TextView getTextView(int viewId) {
return (TextView) getView(viewId);
}
public Button getButton(int viewId) {
return (Button) getView(viewId);
}
public ImageView getImageView(int viewId) {
return (ImageView) getView(viewId);
}
public ImageButton getImageButton(int viewId) {
return (ImageButton) getView(viewId);
}
public EditText getEditText(int viewId) {
return (EditText) getView(viewId);
}
public RecyclerViewHolder setText(int viewId, String value) {
TextView view = findViewById(viewId);
view.setText(MStringUtils.isNullOrEmpty(value) ? "" : value);
return this;
}
public RecyclerViewHolder setVisible(int viewId, int visible) {
View view = findViewById(viewId);
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