Android studio 如何在更改sqlite中的数据的同时更改recycleview的内容？

我在recycleview（cardview的一部分，为每次插入生成）中有一个按钮，它在SQLite中增加一个id为的特定列，数据会被更改，但我必须重新启动活动才能更改。 更改后的数据必须显示在文本视图中

我对这一点还不熟悉，如何使它们动态变化

public class attendence_recycleadapter extends RecyclerView.Adapter<attendence_recycleadapter.ViewHolder> {

    private List<attendence> mattendence_list;
    private Context mcontext;
    public RecyclerView mrecycleview;
    @NonNull
    @Override
    public attendence_recycleadapter.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        LayoutInflater inflater= LayoutInflater.from(parent.getContext());
        View v=inflater.inflate(R.layout.attendence_recycleview_card,parent,false);
        ViewHolder viewHolder = new ViewHolder(v);
        return viewHolder;
    }

    @Override
    public void onBindViewHolder(@NonNull attendence_recycleadapter.ViewHolder holder, final int position) {
        final attendence attendence= mattendence_list.get(position);

        holder.subname.setText("NAME: " + attendence.getSubname());
        holder.subcredit.setText("CREDIT: " + attendence.getCredit());
        holder.bunks.setText("BUNKS: " + attendence.getBunks());
        holder.deletesub.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Myhelper myhelper = new Myhelper(mcontext);
               myhelper.delete(attendence.getId(),mcontext);
               notifyItemRemoved(position);
               notifyItemRangeChanged(position,mattendence_list.size());
               notifyDataSetChanged();
                delete(position);
            }
        });
        holder.addbunk.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Myhelper myhelper = new Myhelper(mcontext);
              myhelper.updatebunk(attendence.getId());
                Toast.makeText(mcontext,"+1 class bunked",Toast.LENGTH_SHORT).show();


            }
        });
        holder.deletebunk.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Myhelper myhelper=new Myhelper(mcontext);
                myhelper.updatebunkdelete(attendence.getId());
                Toast.makeText(mcontext,"Bunk deleted",Toast.LENGTH_SHORT).show();
            }
        });

    }

    @Override
    public int getItemCount() {
        return mattendence_list.size();
    }

    public class ViewHolder extends RecyclerView.ViewHolder {

        public TextView subname;
        public TextView subcredit;
        public TextView bunks;
        public View layout;
        public TextView addbunk;
public TextView deletebunk;
        public TextView deletesub;
        public ViewHolder(View itemView) {
            super(itemView);
            layout=itemView;
            subname=(TextView)itemView.findViewById(R.id.attendernce_subname);
            subcredit=(TextView)itemView.findViewById(R.id.attendernce_credit);
            bunks=(TextView)itemView.findViewById(R.id.attendernce_bunks);
deletebunk =(TextView)itemView.findViewById(R.id.attendence_deletebunk);
            addbunk = (TextView) itemView.findViewById(R.id.attendence_addbunk);
            deletesub = (TextView) itemView.findViewById(R.id.attendence_deletesub);

        }
    }
    public void add(int position,attendence attendence2){
        mattendence_list.add(position,attendence2);
        notifyItemInserted(position);
    }
    public  void delete(int position){
        mattendence_list.remove(position);
        notifyItemRemoved(position);
    }
    public attendence_recycleadapter(List<attendence> mydataset, Context context, RecyclerView recyclerView){
        mattendence_list =  mydataset;
        mcontext = context;
        mrecycleview= recyclerView;
    }


}

mysqlitehelper：

public class Myhelper extends SQLiteOpenHelper {
public static final String DATABASE_NAME="mydatabase.db";
    public static final String TABLE_NAME="mytable";
    public static final String COLUMN_ID="_id";
    public static final String COL_1="NAME";
    public static  final String COL_2="CREDIT";
    public  static final String COL_3="BUNKS";
    public static final String[] COLUMNS ={COLUMN_ID,COL_1,COL_2,COL_3};
    Context con;

    public Myhelper(Context context) {
        super(context, DATABASE_NAME, null, 1);
        con = context;
    }


    @Override
    public void onCreate(SQLiteDatabase db) {
        String createTable= "CREATE TABLE " + TABLE_NAME + " (" + COLUMN_ID +" INTEGER PRIMARY KEY AUTOINCREMENT, " + " NAME TEXT, CREDIT TEXT, BUNKS INTEGER )";
        db.execSQL(createTable);
        Toast.makeText(con,"table created",Toast.LENGTH_SHORT).show();
    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
        db.execSQL("DROP TABLE IF EXISTS "+ TABLE_NAME);
        onCreate(db);

    }
    public boolean insertData(String x,String y,int z){
        SQLiteDatabase db=this.getWritableDatabase();
        ContentValues contentValues = new ContentValues();
        contentValues.put(COL_1, String.valueOf(x));
        contentValues.put(COL_2,String.valueOf(y));
       contentValues.put(COL_3,z);
        long result = db.insert(TABLE_NAME, null, contentValues);
        if (result == -1) {
            return false;
        } else {
            return true;
        }
    }

    public ArrayList<String> queryXdata(){
        ArrayList<String> xnewdata= new ArrayList<String>();
        String query = "SELECT "+ COL_1 + " FROM " + TABLE_NAME;
        SQLiteDatabase db=this.getWritableDatabase();
        Cursor cursor= db.rawQuery(query,null);
        for (cursor.moveToFirst(); !cursor.isAfterLast(); cursor.moveToNext()){
            xnewdata.add(cursor.getString(cursor.getColumnIndex(COL_1)));
        }
        cursor.close();
        return xnewdata;

    }
    public ArrayList<Integer> queryYdata(){
        ArrayList<Integer> ynewdata= new ArrayList<Integer>();
        String query = "SELECT "+ COL_3+ " FROM " + TABLE_NAME;
        SQLiteDatabase db=this.getWritableDatabase();
        Cursor cursor= db.rawQuery(query,null);
        for (cursor.moveToFirst(); !cursor.isAfterLast(); cursor.moveToNext()){
            ynewdata.add(cursor.getInt(cursor.getColumnIndex(COL_3)));
        }
        cursor.close();
        return ynewdata;

    }
    public  ArrayList<Integer> queryZdata(){
       ArrayList<Integer> znewdata= new ArrayList<Integer>();
        String query = "SELECT "+ COL_2+ " FROM " + TABLE_NAME;
        SQLiteDatabase db=this.getWritableDatabase();
        Cursor cursor= db.rawQuery(query,null);
        for (cursor.moveToFirst(); !cursor.isAfterLast(); cursor.moveToNext()){
            znewdata.add(((cursor.getColumnIndex(COL_2))));
        }
        cursor.close();
        return znewdata;
    }

    public attendence getdetails(long id){
        SQLiteDatabase db = this.getWritableDatabase();
        String query= "SELECT" + COL_2+" FROM " + TABLE_NAME +" WHERE _id=" + id;
        Cursor cursor= db.rawQuery(query,null);
        attendence attendence1= new attendence();
        if (cursor.getCount()>0){
            cursor.moveToFirst();
            attendence1.setSubname(cursor.getString(cursor.getColumnIndex(COL_1)));
            attendence1.setCredit(cursor.getString(cursor.getColumnIndex(COL_2)));
            attendence1.setBunks(cursor.getInt(cursor.getColumnIndex(COL_3)));
        }
        return attendence1;
    }

    public void delete(long id,Context context){
        SQLiteDatabase db=this.getWritableDatabase();
        db.execSQL("DELETE FROM "+TABLE_NAME+" WHERE _id='"+id+"'");
        Toast.makeText(context,"delted",Toast.LENGTH_SHORT).show();
    }
    public List<attendence> list(String  filter){
        String query;
        if (filter.equals("")){
            query = "SELECT * FROM " + TABLE_NAME ;

        }
        else {
            query= " SELECT * FROM " + TABLE_NAME ;

        }
        List<attendence> linkedlist = new LinkedList<>();
        SQLiteDatabase db = this.getWritableDatabase();
        Cursor cursor = db.rawQuery(query,null);
        attendence attendence;
        if (cursor.moveToFirst()){
            do {
                attendence = new attendence();
                attendence.setId(cursor.getLong(cursor.getColumnIndex(COLUMN_ID)));
                attendence.setSubname(cursor.getString(cursor.getColumnIndex(COL_1)));
                attendence.setCredit(cursor.getString(cursor.getColumnIndex(COL_2)));
                attendence.setBunks(cursor.getInt(cursor.getColumnIndex(COL_3)));
                linkedlist.add(attendence);
            }
            while (cursor.moveToNext());
        }
        return linkedlist;
    }


    public int getbunk(long id) {
        SQLiteDatabase db = this.getReadableDatabase();
        Cursor cursor = db.rawQuery("SELECT * FROM " + TABLE_NAME + " WHERE " + COLUMN_ID + " = " + String.valueOf(id), null);
        int output = -1;
        if (cursor != null) {
            if (cursor.moveToFirst()) {
                output = cursor.getInt(cursor.getColumnIndex(COL_3));
            }
            cursor.close();
        }
        return output;

    }
    public void updatebunk(long id){
        SQLiteDatabase db = this.getWritableDatabase();
        int bunk = getbunk(id);
        int bunkinc= ++bunk;
        ContentValues contentValues= new ContentValues();
        contentValues.put(COL_3,bunkinc);
        db.update(TABLE_NAME,contentValues,COLUMN_ID+ "=?",new String[]{String.valueOf(id)});
        db.close();
    }
    public void updatebunkdelete(long id){
        SQLiteDatabase db = this.getWritableDatabase();
        int bunk = getbunk(id);
        int bunkinc= --bunk;
        ContentValues contentValues= new ContentValues();
        contentValues.put(COL_3,bunkinc);
        db.update(TABLE_NAME,contentValues,COLUMN_ID+ "=?",new String[]{String.valueOf(id)});
        db.close();
    }
}

公共类Myhelper扩展了SQLiteOpenHelper{
公共静态最终字符串数据库\u NAME=“mydatabase.db”；
公共静态最终字符串表\u NAME=“mytable”；
公共静态最终字符串列_ID=“_ID”；
公共静态最终字符串COL_1=“NAME”；
公共静态最终字符串COL_2=“CREDIT”；
公共静态最终字符串COL_3=“BUNKS”；
公共静态最终字符串[]列={COLUMN_ID，COL_1，COL_2，COL_3}；
上下文con；
公共Myhelper（上下文）{
super（上下文，数据库名称，null，1）；
con=上下文；
}
@凌驾
public void onCreate（SQLiteDatabase db）{
String createTable=“CREATE TABLE”+TABLE_NAME+”（“+列_ID+”整型主键自动递增“+”名称文本、信用文本、BUNKS整型）”；
execSQL（createTable）；
Toast.makeText（con，“table created”，Toast.LENGTH_SHORT）.show（）；
}
@凌驾
public void onUpgrade（SQLiteDatabase db，int-oldVersion，int-newVersion）{
db.execSQL（“如果存在删除表”+表名称）；
onCreate（db）；
}
公共布尔插入数据（字符串x、字符串y、整数z）{
SQLiteDatabase db=this.getWritableDatabase（）；
ContentValues ContentValues=新ContentValues（）；
contentValues.put（COL_1，String.valueOf（x））；
contentValues.put（COL_2，String.valueOf（y））；
contentValues.put（COL_3，z）；
long result=db.insert（表名称，null，contentValues）；
如果（结果==-1）{
返回false；
}否则{
返回true；
}
}
公共ArrayList queryXdata（）{
ArrayList xnewdata=新的ArrayList（）；
String query=“从”+表名称中选择”+列1+；
SQLiteDatabase db=this.getWritableDatabase（）；
Cursor Cursor=db.rawQuery（查询，空）；
对于（cursor.moveToFirst（）；！cursor.isAfterLast（）；cursor.moveToNext（））{
添加（cursor.getString（cursor.getColumnIndex（COL_1）））；
}
cursor.close（）；
返回xnewdata；
}
公共ArrayList QueryData（）{
ArrayList ynewdata=新的ArrayList（）；
String query=“从”+表名称中选择”+列3+；
SQLiteDatabase db=this.getWritableDatabase（）；
Cursor Cursor=db.rawQuery（查询，空）；
对于（cursor.moveToFirst（）；！cursor.isAfterLast（）；cursor.moveToNext（））{
添加（cursor.getInt（cursor.getColumnIndex（COL_3））；
}
cursor.close（）；
返回ynewdata；
}
公共ArrayList queryZdata（）{
ArrayList znewdata=新的ArrayList（）；
String query=“从”+表名称中选择”+列2+；
SQLiteDatabase db=this.getWritableDatabase（）；
Cursor Cursor=db.rawQuery（查询，空）；
对于（cursor.moveToFirst（）；！cursor.isAfterLast（）；cursor.moveToNext（））{
znewdata.add（（cursor.getColumnIndex（COL_2）））；
}
cursor.close（）；
返回znewdata；
}
公众参与详细信息（长id）{
SQLiteDatabase db=this.getWritableDatabase（）；
String query=“从“+表格名称+”中选择“+COL_2+”，其中_id=“+id；
Cursor Cursor=db.rawQuery（查询，空）；
注意力注意力1=新注意力（）；
if（cursor.getCount（）>0）{
cursor.moveToFirst（）；
attendence1.setSubname（cursor.getString（cursor.getColumnIndex（COL_1））；
attendence1.setCredit（cursor.getString（cursor.getColumnIndex（COL_2））；
注意1.缩进（cursor.getInt（cursor.getColumnIndex（COL_3））；
}
返回出席人数1；
}
公共无效删除（长id，上下文）{
SQLiteDatabase db=this.getWritableDatabase（）；
db.execSQL（“从“+表名+”中删除，其中“+id=”“+id+””）；
Toast.makeText（上下文，“delted”，Toast.LENGTH_SHORT）.show（）；
}
公共列表（字符串筛选器）{
字符串查询；
if（filter.equals（“”）{
query=“SELECT*FROM”+表名称；
}
否则{
query=“SELECT*FROM”+表名称；
}
List linkedlist=新建linkedlist（）；
SQLiteDatabase db=this.getWritableDatabase（）；
Cursor Cursor=db.rawQuery（查询，空）；
注意力；
if（cursor.moveToFirst（））{
做{
注意力=新注意力（）；
attendence.setId（cursor.getLong（cursor.getColumnIndex（COLUMN_ID））；
attendence.setSubname（cursor.getString（cursor.getColumnIndex（COL_1））；
attendence.setCredit（cursor.getString（cursor.getColumnIndex（COL_2））；
注意力.退步（cursor.getInt（cursor.getColumnIndex（COL_3））；
linkedlist.add（出席）；
}
while（cursor.moveToNext（））；
}
返回linkedlist；
}
公共上铺（长id）{
SQLiteDatabase db=this.getReadableDatabase（）；
Cursor Cursor=db.rawQuery（“从“+表名+”中选择*，其中“+列ID+”=”+字符串.valueOf（ID），null）；
int输出=-1；
如果（光标！=null）{
if（cursor.moveToFirst（））{
输出=cursor.getInt（cursor.getColumnIndex（COL_3））；
}
cursor.close（）；
}
返回输出；
}
public void updatebunk（长id）{
SQLiteDatabase db=this.getWritableDatabase（）；
int bunk=getbunk（id）；
int bunkinc=++bunk；
ContentValues ContentValues=新ContentValues（）；
contentValues.put（COL_3，bunkinc）；
数据库更新（表1）_
public class Myhelper extends SQLiteOpenHelper {
public static final String DATABASE_NAME="mydatabase.db";
    public static final String TABLE_NAME="mytable";
    public static final String COLUMN_ID="_id";
    public static final String COL_1="NAME";
    public static  final String COL_2="CREDIT";
    public  static final String COL_3="BUNKS";
    public static final String[] COLUMNS ={COLUMN_ID,COL_1,COL_2,COL_3};
    Context con;

    public Myhelper(Context context) {
        super(context, DATABASE_NAME, null, 1);
        con = context;
    }


    @Override
    public void onCreate(SQLiteDatabase db) {
        String createTable= "CREATE TABLE " + TABLE_NAME + " (" + COLUMN_ID +" INTEGER PRIMARY KEY AUTOINCREMENT, " + " NAME TEXT, CREDIT TEXT, BUNKS INTEGER )";
        db.execSQL(createTable);
        Toast.makeText(con,"table created",Toast.LENGTH_SHORT).show();
    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
        db.execSQL("DROP TABLE IF EXISTS "+ TABLE_NAME);
        onCreate(db);

    }
    public boolean insertData(String x,String y,int z){
        SQLiteDatabase db=this.getWritableDatabase();
        ContentValues contentValues = new ContentValues();
        contentValues.put(COL_1, String.valueOf(x));
        contentValues.put(COL_2,String.valueOf(y));
       contentValues.put(COL_3,z);
        long result = db.insert(TABLE_NAME, null, contentValues);
        if (result == -1) {
            return false;
        } else {
            return true;
        }
    }

    public ArrayList<String> queryXdata(){
        ArrayList<String> xnewdata= new ArrayList<String>();
        String query = "SELECT "+ COL_1 + " FROM " + TABLE_NAME;
        SQLiteDatabase db=this.getWritableDatabase();
        Cursor cursor= db.rawQuery(query,null);
        for (cursor.moveToFirst(); !cursor.isAfterLast(); cursor.moveToNext()){
            xnewdata.add(cursor.getString(cursor.getColumnIndex(COL_1)));
        }
        cursor.close();
        return xnewdata;

    }
    public ArrayList<Integer> queryYdata(){
        ArrayList<Integer> ynewdata= new ArrayList<Integer>();
        String query = "SELECT "+ COL_3+ " FROM " + TABLE_NAME;
        SQLiteDatabase db=this.getWritableDatabase();
        Cursor cursor= db.rawQuery(query,null);
        for (cursor.moveToFirst(); !cursor.isAfterLast(); cursor.moveToNext()){
            ynewdata.add(cursor.getInt(cursor.getColumnIndex(COL_3)));
        }
        cursor.close();
        return ynewdata;

    }
    public  ArrayList<Integer> queryZdata(){
       ArrayList<Integer> znewdata= new ArrayList<Integer>();
        String query = "SELECT "+ COL_2+ " FROM " + TABLE_NAME;
        SQLiteDatabase db=this.getWritableDatabase();
        Cursor cursor= db.rawQuery(query,null);
        for (cursor.moveToFirst(); !cursor.isAfterLast(); cursor.moveToNext()){
            znewdata.add(((cursor.getColumnIndex(COL_2))));
        }
        cursor.close();
        return znewdata;
    }

    public attendence getdetails(long id){
        SQLiteDatabase db = this.getWritableDatabase();
        String query= "SELECT" + COL_2+" FROM " + TABLE_NAME +" WHERE _id=" + id;
        Cursor cursor= db.rawQuery(query,null);
        attendence attendence1= new attendence();
        if (cursor.getCount()>0){
            cursor.moveToFirst();
            attendence1.setSubname(cursor.getString(cursor.getColumnIndex(COL_1)));
            attendence1.setCredit(cursor.getString(cursor.getColumnIndex(COL_2)));
            attendence1.setBunks(cursor.getInt(cursor.getColumnIndex(COL_3)));
        }
        return attendence1;
    }

    public void delete(long id,Context context){
        SQLiteDatabase db=this.getWritableDatabase();
        db.execSQL("DELETE FROM "+TABLE_NAME+" WHERE _id='"+id+"'");
        Toast.makeText(context,"delted",Toast.LENGTH_SHORT).show();
    }
    public List<attendence> list(String  filter){
        String query;
        if (filter.equals("")){
            query = "SELECT * FROM " + TABLE_NAME ;

        }
        else {
            query= " SELECT * FROM " + TABLE_NAME ;

        }
        List<attendence> linkedlist = new LinkedList<>();
        SQLiteDatabase db = this.getWritableDatabase();
        Cursor cursor = db.rawQuery(query,null);
        attendence attendence;
        if (cursor.moveToFirst()){
            do {
                attendence = new attendence();
                attendence.setId(cursor.getLong(cursor.getColumnIndex(COLUMN_ID)));
                attendence.setSubname(cursor.getString(cursor.getColumnIndex(COL_1)));
                attendence.setCredit(cursor.getString(cursor.getColumnIndex(COL_2)));
                attendence.setBunks(cursor.getInt(cursor.getColumnIndex(COL_3)));
                linkedlist.add(attendence);
            }
            while (cursor.moveToNext());
        }
        return linkedlist;
    }


    public int getbunk(long id) {
        SQLiteDatabase db = this.getReadableDatabase();
        Cursor cursor = db.rawQuery("SELECT * FROM " + TABLE_NAME + " WHERE " + COLUMN_ID + " = " + String.valueOf(id), null);
        int output = -1;
        if (cursor != null) {
            if (cursor.moveToFirst()) {
                output = cursor.getInt(cursor.getColumnIndex(COL_3));
            }
            cursor.close();
        }
        return output;

    }
    public void updatebunk(long id){
        SQLiteDatabase db = this.getWritableDatabase();
        int bunk = getbunk(id);
        int bunkinc= ++bunk;
        ContentValues contentValues= new ContentValues();
        contentValues.put(COL_3,bunkinc);
        db.update(TABLE_NAME,contentValues,COLUMN_ID+ "=?",new String[]{String.valueOf(id)});
        db.close();
    }
    public void updatebunkdelete(long id){
        SQLiteDatabase db = this.getWritableDatabase();
        int bunk = getbunk(id);
        int bunkinc= --bunk;
        ContentValues contentValues= new ContentValues();
        contentValues.put(COL_3,bunkinc);
        db.update(TABLE_NAME,contentValues,COLUMN_ID+ "=?",new String[]{String.valueOf(id)});
        db.close();
    }
}

public int updatebunk(long id){
    SQLiteDatabase db = this.getWritableDatabase();
    int bunk = getbunk(id);
    int bunkinc= ++bunk;
    ContentValues contentValues= new ContentValues();
    contentValues.put(COL_3, bunkinc);
    db.update(TABLE_NAME,contentValues,COLUMN_ID+ "=?",new String[]{String.valueOf(id)});
    db.close();

    return bunkinc;
}

    holder.addbunk.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Myhelper myhelper = new Myhelper(mcontext);
            int newbunk = myhelper.updatebunk(attendence.getId());
            attendence.setBunks(newbunk);
            mattendence_list.set(position, attendence);
            notifyDataSetChanged();
            Toast.makeText(mcontext,"+1 class bunked",Toast.LENGTH_SHORT).show();
        }
    });