怎么在Android中使用RecyclerView实现一个点击条目删除功能
怎么在Android中使用RecyclerView实现一个点击条目删除功能?很多新手对此不是很清楚,为了帮助大家解决这个难题,下面小编将为大家详细讲解,有这方面需求的人可以来学习下,希望你能有所收获。

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Android是什么
Android是一种基于Linux内核的自由及开放源代码的操作系统,主要使用于移动设备,如智能手机和平板电脑,由美国Google公司和开放手机联盟领导及开发。
MainActivity.java
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 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
RvAdapter.java
public class RvAdapter extends RecyclerView.Adapter{ private List lists; private Context mContext; public RvAdapter(List 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
implementation 'com.android.support:recyclerview-v7:27.1.1'
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文章题目:怎么在Android中使用RecyclerView实现一个点击条目删除功能
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