Android-UI佈局---RecyclerView學習(一)在介面卡中自定義長按和點選事件
阿新 • • 發佈:2019-02-06
該系列文章 如果想全方面學習,建議參考這個大牛的文章,寫的真可以。
地址:http://blog.csdn.net/lmj623565791/article/details/45059587
因為RecyclerView沒有點選、長按事件,需要自己寫
實現的方式比較多,可以通過adapter中自己去提供回撥
廢話不多說,直接看程式碼:
在對應的activity中adapter例項呼叫點選事件:public class GalleryAdapter extends RecyclerView.Adapter<GalleryAdapter.ViewHolder> { /** *定義回撥介面 */ public interface OnItemClickLitener { void onItemClick(View view, int position);//點選事件 } /** * 單擊 點選監聽事件變數 */ private OnItemClickLitener mOnItemClickLitener; /** * 設定 * @param mOnItemClickLitener */ public void setOnItemClickLitener(OnItemClickLitener mOnItemClickLitener) { this.mOnItemClickLitener = mOnItemClickLitener; } private LayoutInflater mInflater;//佈局填充器 private List<Integer> mDatas;//介面卡繫結的資料 /** * 建構函式 */ public GalleryAdapter(Context context, List<Integer> datats) { mInflater = LayoutInflater.from(context); mDatas = datats; } /** *ViewHolder 跟listView裡面一樣 屬性是item 佈局裡面各個檢視控制元件 */ public static class ViewHolder extends RecyclerView.ViewHolder { public ViewHolder(View arg0) { //這裡面可以先找到各個檢視控制元件, super(arg0); } ImageView mImg; TextView mTxt; } @Override public int getItemCount() { return mDatas.size(); } @Override public ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) { //找到對應的佈局item View view = mInflater.inflate(R.layout.activity_index_gallery_item,viewGroup, false); ViewHolder viewHolder = new ViewHolder(view); viewHolder.mImg = (ImageView) view.findViewById(R.id.id_index_gallery_item_image); return viewHolder; } /** * 該函式用來進行資料填充的,同時如果有監聽事件,也在這裡面 */ @Override public void onBindViewHolder(final ViewHolder viewHolder, final int i) { // 佈局填充資料 viewHolder.mImg.setImageResource(mDatas.get(i)); // 如果設定了回撥,則設定點選事件 if (mOnItemClickLitener != null) { viewHolder.itemView.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { //設定點選事件 具體的呼叫執行,由當前的adapter例項進行操作 mOnItemClickLitener.onItemClick(viewHolder.itemView, i); } }); } } }
mAdapter.setOnItemClickLitener(new OnItemClickLitener() { @Override public void onItemClick(View view, int position) { Toast.makeText(HomeActivity.this, position + " click", Toast.LENGTH_SHORT).show(); } @Override public void onItemLongClick(View view, int position) { Toast.makeText(HomeActivity.this, position + " long click", Toast.LENGTH_SHORT).show(); mAdapter.removeData(position); } });
該處程式碼只展示了 點選事件,長按事件是一樣的做法,無非就是多一個方法了:
public interface OnItemClickLitener
{
void onItemClick(View view, int position);
void onItemLongClick(View view , int position);
}
然後在onBindViewHolder裡面加入設定就可以:
viewHolder.itemView.setOnLongClickListener(new OnLongClickListener() { @Override public boolean onLongClick(View v) { mOnItemClickLitener.onItemLongClick(viewHolder.itemView, i); } });