本文实例为大家分享了RecyclerView实现点击条目删除的具体代码，供大家参考，具体内容如下
MainActivity.java
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public class MainActivity extends AppCompatActivity implements View.OnClickListener{ private Button mButton1; private Button mButton2; private Button mButton3; private Button mButton4; private Button mButton5; private RecyclerView mRecyclerView; private ArrayList<String> mList; private LinearLayoutManager mLinearLayoutManager; private RvAdapter mAdapter; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); findViews(); mList = new ArrayList<>(); for (int i=0;i<20;i++){ mList.add(i+"item"); } mAdapter = new RvAdapter(mList, this); mRecyclerView.setAdapter(mAdapter); //设置分割线 mRecyclerView.addItemDecoration(new DividerItemDecoration(this,DividerItemDecoration.VERTICAL)); //设置默认布局 mLinearLayoutManager = new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false); mRecyclerView.setLayoutManager(mLinearLayoutManager); mAdapter.setOnItemClickListener(new RvAdapter.OnItemClickListener() { @Override public void onItemClick(int position) { mAdapter.remove(position); } @Override public void onItemLongClick(int position) { mAdapter.remove(position); } }); } private void findViews() { mRecyclerView = findViewById(R.id.rv); mButton1= findViewById(R.id.b1); mButton2= findViewById(R.id.b2); mButton3= findViewById(R.id.b3); mButton4= findViewById(R.id.b4); mButton5= findViewById(R.id.b5); mButton1.setOnClickListener(this); mButton2.setOnClickListener(this); mButton3.setOnClickListener(this); mButton4.setOnClickListener(this); mButton5.setOnClickListener(this); } @Override public void onClick(View view) { switch (view.getId()){ case R.id.b1: mAdapter.addData(3); mRecyclerView.scrollToPosition(0); break; case R.id.b2: mAdapter.remove(mList.size()-1); break; case R.id.b3: mLinearLayoutManager = new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false); mRecyclerView.setLayoutManager(mLinearLayoutManager); break; case R.id.b4: mRecyclerView.setLayoutManager(new GridLayoutManager(this, 3)); //mRecyclerView.addItemDecoration(new android.support.v7.widget.DividerItemDecoration(this, DividerItemDecoration.HORIZONTAL)); break; case R.id.b5: mRecyclerView.setLayoutManager(new StaggeredGridLayoutManager(2,StaggeredGridLayoutManager.VERTICAL)); break; } }} |
activity_main.xml
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<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".MainActivity"> <LinearLayout android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical"> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal"> <Button android:id="@+id/b1" android:layout_width="wrap_content" android:layout_weight="1" android:layout_height="wrap_content" android:text="添加"/> <Button android:id="@+id/b2" android:layout_width="wrap_content" android:layout_weight="1" android:layout_height="wrap_content" android:text="删除"/> <Button android:id="@+id/b3" android:layout_width="wrap_content" android:layout_weight="1" android:layout_height="wrap_content" android:text="List"/> <Button android:id="@+id/b4" android:layout_width="wrap_content" android:layout_weight="1" android:layout_height="wrap_content" android:text="Grid"/> <Button android:id="@+id/b5" android:layout_width="wrap_content" android:layout_weight="1" android:layout_height="wrap_content" android:text="flow"/> </LinearLayout> <android.support.v7.widget.RecyclerView android:id="@+id/rv" android:layout_width="match_parent" android:layout_height="match_parent"/> </LinearLayout></android.support.constraint.ConstraintLayout> |
RvAdapter.java
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public class RvAdapter extends RecyclerView.Adapter<RvAdapter.ViewHolder>{ private List<String> lists; private Context mContext; public RvAdapter(List<String> lists, Context context) { this.lists = lists; mContext = context; } @Override public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { View view = View.inflate(mContext, R.layout.item, null); ViewHolder holder = new ViewHolder(view); return holder; } public void addData(int position) { lists.add(position,"ff"); notifyItemInserted(position); } public void remove(int i) { lists.remove(i); notifyItemRemoved(i); notifyDataSetChanged(); } public interface OnItemClickListener{ //自定义接口回调设置点击事件 void onItemClick(int position); void onItemLongClick(int position); } private OnItemClickListener mOnItemClickListener; public void setOnItemClickListener(OnItemClickListener onItemClickListener){ mOnItemClickListener=onItemClickListener; } @Override public void onBindViewHolder(final ViewHolder holder, final int position) { holder.mTextView.setText(lists.get(position)); holder.itemView.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { int ps = holder.getLayoutPosition(); mOnItemClickListener.onItemClick(ps); } }); holder.itemView.setOnLongClickListener(new View.OnLongClickListener() { @Override public boolean onLongClick(View view) { int ps=holder.getLayoutPosition(); mOnItemClickListener.onItemLongClick(ps); return false; } }); } @Override public int getItemCount() { return lists.size(); } public static class ViewHolder extends RecyclerView.ViewHolder{ public final TextView mTextView; public ViewHolder(View itemView) { super(itemView); mTextView = (TextView) itemView.findViewById(R.id.tv); } }} |
build.gradle
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implementation 'com.android.support:recyclerview-v7:27.1.1' |
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
原文链接：https://blog.csdn.net/FanRQ_/article/details/84071848
