RecyclerView需要引入support-v7才能使用
compile 'com.android.support:recyclerview-v7:25.0.1'
RecyclerView的基本使用
//新建布局管理器
LinearLayoutManager layoutManager = new LinearLayoutManager(this);
//設(shè)置布局的方向
layoutManager.setOrientation(LinearLayoutManager.VERTICAL);
//為RecyclerView添加布局管理器
recyclerView.setLayoutManager(layoutManager);
//設(shè)置適配器
adapter = new MyAdapter(mDatas);
recyclerView.setAdapter(adapter);
RecyclerView適配器的適配器需繼承RecyclerView.Adapter撵割,代碼如下:
private static class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {
List<String> data;
//傳入數(shù)據(jù)
public MyAdapter(List<String> data) {
this.data = data;
}
private OnItemClickLitener mOnItemClickLitener;
//創(chuàng)建新的View
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item, parent, false);
ViewHolder viewHolder = new ViewHolder(view);
return viewHolder;
}
//為控件綁定數(shù)據(jù)
@Override
public void onBindViewHolder(final ViewHolder holder, int position) {
holder.textView.setText(data.get(position));
}
//返回?cái)?shù)據(jù)個(gè)數(shù)
@Override
public int getItemCount() {
return data.size();
}
//綁定控件
class ViewHolder extends RecyclerView.ViewHolder {
private TextView textView;
public ViewHolder(View itemView) {
super(itemView);
textView = (TextView) itemView.findViewById(R.id.tc_item);
}
}
//刪除item
public void removeData(int position) {
data.remove(position);
notifyItemRemoved(position);
}
}
LinearLayoutManager線性布局可設(shè)置滑動方向
setOrientation(LinearLayoutManager.VERTICAL);//豎直滑動
setOrientation(LinearLayoutManager.HORIZONTAL);//橫向滑動
GridLayoutManager網(wǎng)格布局 需要設(shè)置列數(shù)
GridLayoutManager gridLayoutManager = new GridLayoutManager(this,4);
StaggeredGridLayoutManager瀑布流布局 可設(shè)置方向與列數(shù)
StaggeredGridLayoutManager gridLayoutManager = new StaggeredGridLayoutManager(4,StaggeredGridLayoutManager.HORIZONTAL);
瀑布流布局還需改變item的高度 在適配的onBindViewHolder中加入
ViewGroup.LayoutParams params = holder.itemView.getLayoutParams();//得到item的LayoutParams布局參數(shù)
params.height = (int) (200 + Math.random() * 400);//把隨機(jī)的高度賦予itemView布局
holder.itemView.setLayoutParams(params);//把params設(shè)置給itemView布局
為item添加點(diǎn)擊和長按事件
首先新建回調(diào)接口
//設(shè)置點(diǎn)擊回調(diào)
public void setOnItemClickLitener(OnItemClickLitener mOnItemClickLitener) {
this.mOnItemClickLitener = mOnItemClickLitener;
}
//點(diǎn)擊接口
public interface OnItemClickLitener {
void onItemClick(View view, int position);
void onItemLongClick(View view, int position);
}
然后為item添加點(diǎn)擊事件瓢湃,最后應(yīng)用自定義回調(diào)事件。
if (mOnItemClickLitener != null) {
holder.itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
int pos = holder.getLayoutPosition();
mOnItemClickLitener.onItemClick(holder.itemView, pos);//設(shè)置點(diǎn)擊事件
}
});
holder.itemView.setOnLongClickListener(new View.OnLongClickListener() {
@Override
public boolean onLongClick(View view) {
int pos = holder.getLayoutPosition();
mOnItemClickLitener.onItemLongClick(holder.itemView, pos);//設(shè)置長按事件
return false;
}
});
}