Android RecyclerView实现点击条目删除

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

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

<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

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

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脚本之家。

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