Android完美處理RecyclerView實現item條目點選事件處理
阿新 • • 發佈:2018-12-03
前言:
RecyclerView並沒有像ListView那樣提供了OnItemClick,OnItemLongClick等事件回撥介面,所以,我們需要自己寫介面去進行實現。
正題
①、建立介面類OnRecyclerViewClickListener
/** * RecyclerView條目點選介面 * Created by kang on 2018/9/19. */ public interface OnRecyclerViewClickListener { void onItemClickListener(View view); void onItemLongClickListener(View view); }
②、RecyclerView的Adapter中處理介面
- Adapter中建立方法setItemClickListener()
private OnRecyclerViewClickListener listener;
public void setItemClickListener(OnRecyclerViewClickListener itemClickListener) {
listener = itemClickListener;
}
- 在Adapter中onCreateViewHolder()方法中將listener註冊為Click回撥監聽
@Override public FirstViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { View view = LayoutInflater.from(context).inflate(R.layout.item_first,null); FirstViewHolder viewHolder = new FirstViewHolder(view); //介面回撥 if(listener != null){ view.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { listener.onItemClickListener(v); } }); view.setOnLongClickListener(new View.OnLongClickListener() { @Override public boolean onLongClick(View v) { listener.onItemLongClickListener(v); return true; } }); } return viewHolder; }
- 索引可以通過RecyclerView.getChildAdapterPosition獲取到當前點選的Item的列表索引
int position = recyclerView.getChildAdapterPosition(view);
③、在Activity或Fragment中使用
FirstViewAdapter adapter = new FirstViewAdapter(context,strings);
recyclerView.setLayoutManager(new GridLayoutManager(context,2));
//新增Android自帶的分割線
recyclerView.addItemDecoration(new DividerItemDecoration(this,DividerItemDecoration.VERTICAL));
recyclerView.setAdapter(adapter);
adapter.setItemClickListener(new OnRecyclerViewClickListener() {
@Override
public void onItemClickListener(View view) {
int position = recyclerView.getChildAdapterPosition(view);
switch (position){
case 0:
startActivity(new Intent(context,MainActivity.class));
break;
case 1:
startActivity(new Intent(context,BottomNavigationActivity.class));
break;
case 2:
startActivity(new Intent(context,TopTabActivity.class));
break;
case 3:
startActivity(new Intent(context,ListActivity.class));
break;
case 4:
startActivity(new Intent(context,RecyclerViewActivity.class));
break;
case 5:
startActivity(new Intent(context,RefreshAndLoadMoreActivity.class));
break;
case 6:
startActivity(new Intent(context,TabStopActivity.class));
break;
case 7:
startActivity(new Intent(context,FragmentAndRecyclerActivity.class));
break;
}
}
@Override
public void onItemLongClickListener(View view) {
}
});