RecyclerView的監聽與簡介的上拉重新整理
阿新 • • 發佈:2018-12-04
RecyclerView是Android5.0的新特性用來替換掉ListView和Gridview 總的來說RecyclerView比較靈活 高效 解耦度高 但得自定義分割線和列表點選事件
MainActivity:
package com.example.administrator.mytest; import android.os.Bundle; import android.support.v4.widget.SwipeRefreshLayout; import android.support.v7.app.AppCompatActivity; import android.support.v7.widget.DefaultItemAnimator; import android.support.v7.widget.LinearLayoutManager; import android.support.v7.widget.RecyclerView; import android.view.View; import java.util.ArrayList; import java.util.List; public class MainActivity extends AppCompatActivity implements SwipeRefreshLayout.OnRefreshListener{ private RecyclerView mRecycler; private myAdapter adapter; private List data; private SwipeRefreshLayout mRefreshLayout; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mRecycler= (RecyclerView) findViewById(R.id.my_recycler); mRefreshLayout = (SwipeRefreshLayout)findViewById(R.id.layout_swipe_refresh); //設定佈局管理器 預設垂直 mRecycler.setLayoutManager(new LinearLayoutManager(this)); // mRecycler.setLayoutManager(new StaggeredGridLayoutManager(3,StaggeredGridLayoutManager.VERTICAL)); //設定新增刪除 動畫 mRecycler.setItemAnimator(new DefaultItemAnimator()); data=new ArrayList<String>(); data.add("007"); data.add("002"); data.add("1");data.add("2");data.add("3");data.add("4"); data.add("5");data.add("6");data.add("7");data.add("8"); adapter=new myAdapter(this,data); mRecycler.setAdapter(adapter); mRefreshLayout.setOnRefreshListener(this); // 對每個Item進行監聽 adapter.setOnItemClickListener(new myAdapter.OnItemClickListener() { @Override public void onItemClick(View view, int position) { // Toast.makeText(MainActivity.this, data.get(position)+"="+position, Toast.LENGTH_SHORT).show(); //刪除該Item adapter.ItemRemove(position); adapter.notifyDataSetChanged(); } }); } @Override public void onRefresh() { // 處理重新整理的資料 比如設定每次重新整理就加一條 data.add(0,"Faye"); adapter.notifyDataSetChanged(); mRefreshLayout.setRefreshing(false); } }
package com.example.administrator.mytest; import android.content.Context; import android.support.v7.widget.RecyclerView; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.TextView; import android.widget.Toast; import java.util.List; public class myAdapter extends RecyclerView.Adapter<myAdapter.MyViewHolder> implements View.OnClickListener{ private List<String> mList; private Context context; // 宣告 介面的變數 private OnItemClickListener mOnItemClickListener = null; public myAdapter(Context mcontext,List<String> list){ this.mList=list; this.context=mcontext; } //載入條目佈局 @Override public myAdapter.MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { View view= LayoutInflater.from(context).inflate(R.layout.recycler_item,parent,false); MyViewHolder holder=new MyViewHolder(view); view.setOnClickListener(this); return holder; } public void ItemRemove(int position){ mList.remove(position); notifyItemRemoved(position); } //將檢視與資料繫結 @Override public void onBindViewHolder(myAdapter.MyViewHolder holder, int position) { holder.tv.setText(mList.get(position)); //將position儲存在itemView的Tag中,以便點選時進行獲取 holder.itemView.setTag(position); } @Override public int getItemCount() { return mList.size(); } @Override public void onClick(View v) { if (mOnItemClickListener != null) { //注意這裡使用getTag方法獲取position mOnItemClickListener.onItemClick(v,(int)v.getTag()); } } class MyViewHolder extends RecyclerView.ViewHolder { TextView tv; public MyViewHolder(View itemView) { super(itemView); tv= (TextView) itemView.findViewById(R.id.item_tv); tv.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Toast.makeText(context,"我是Item的子控制元件",Toast.LENGTH_SHORT).show(); } }); } } //暴露給外部用 public void setOnItemClickListener(OnItemClickListener listener) { this.mOnItemClickListener = listener; } //定義介面 public static interface OnItemClickListener{ void onItemClick(View view , int position); } }
MainActivity XML檔案
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > <android.support.v4.widget.SwipeRefreshLayout android:id="@+id/layout_swipe_refresh" android:layout_width="match_parent" android:layout_height="match_parent"> <android.support.v7.widget.RecyclerView android:layout_width="match_parent" android:layout_height="match_parent" android:id="@+id/my_recycler" /> </android.support.v4.widget.SwipeRefreshLayout> </LinearLayout>
效果圖