Javascript 将ID字段写入另一个表以进行ListView筛选

关于将主id从一个表传递到新活动，我已经阅读了很多其他帖子，我尝试了几种不同的方法，但都没有成功。我现在以为我通过了，但在下一个活动中实际上什么都没有出现。下面是我想要完成的事情的概要

如果用户创建了一个新的联盟，它将获得一个主ID（1）。用户单击新创建的联赛，现在他们可以选择创建保龄球手。当然，一个投球手可以属于多个联盟，因此我希望能够将联盟Id写入投球手表，这样我就可以只选择leagueId=1，并且只显示与联盟关联的投球手

主要活动

//On Long Click On The RecyclerView Item An Alert Dialog Is Opened With The Option To Choose Edit/Delete
        recyclerView.addOnItemTouchListener(new RecyclerTouchListener(this,
                recyclerView, new RecyclerTouchListener.ClickListener() {
            @Override
            public void onClick(View view, final int position) {



                int leagueId = leaguesList.get( position ).getId();
                Intent myIntent = new Intent(getBaseContext(), Main2Activity.class);
                myIntent.putExtra("value1", leagueId);
                startActivity(myIntent);
                //Intent myIntent = new Intent(getApplicationContext(), BowlerActivity.class);
                //startActivity(myIntent);

            }

            @Override
            public void onLongClick(View view, int position) {
                showActionsDialog(position);
            }
        }));
    }

主要活动

public class Main2Activity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate( savedInstanceState );
        setContentView( R.layout.league_id );
        Toolbar toolbar = (Toolbar) findViewById( R.id.toolbar );
        setSupportActionBar( toolbar );

        String savedExtra = getIntent().getStringExtra( "value1" );
    TextView myText = (TextView) findViewById(R.id.tvLeagueId);
        final String s = myText.toString();
        myText.setText(savedExtra);


    }

}

团级

public static final String TABLE_NAME = "leagues";

        public static final String COLUMN_ID = "_id";
        public static final String COLUMN_NAME = "name";
        public static final String COLUMN_TIMESTAMP = "timestamp";

        private int id;
        private String name;
        private String timestamp;


        // Create table SQL query
        public static final String CREATE_TABLE =
                "CREATE TABLE " + TABLE_NAME + "("
                        + COLUMN_ID + " INTEGER PRIMARY KEY AUTOINCREMENT,"
                        + COLUMN_NAME + " TEXT,"
                        + COLUMN_TIMESTAMP + " DATETIME DEFAULT CURRENT_TIMESTAMP"
                        + ")";

        public League() {
        }

        public League(int id, String name, String timestamp) {
            this.id = id;
            this.name = name;
            this.timestamp = timestamp;
        }

        public int getId() {
            return id;
        }

        public String getName() {
            return name;
        }

        public void setName(String name) {
            this.name = name;
        }

        public String getTimestamp() {
            return timestamp;
        }

        public void setId(int id) {
            this.id = id;
        }

        public void setTimestamp(String timestamp) {
            this.timestamp = timestamp;
        }
}

保龄球课

public static final String TABLE_NAME = "Bowlers";

public static final String COLUMN_ID = "_id";
public static final String COLUMN_LEAGUE_ID = "league_id";
public static final String COLUMN_NAME = "name";
public static final String COLUMN_TIMESTAMP = "timestamp";

private int id;
private int league_id;
private String name;
private String timestamp;


// Create table SQL query
public static final String CREATE_TABLE =
        "CREATE TABLE " + TABLE_NAME + "("
                + COLUMN_ID + " INTEGER PRIMARY KEY AUTOINCREMENT,"
                + COLUMN_LEAGUE_ID + " INTEGER,"
                + COLUMN_NAME + " TEXT,"
                + COLUMN_TIMESTAMP + " DATETIME DEFAULT CURRENT_TIMESTAMP"
                + ")";

public Bowler() {
}

public Bowler(int id, int league_id, String name, String timestamp) {
    this.id = id;
    this.league_id = league_id;
    this.name = name;
    this.timestamp = timestamp;
}

public int getId() {
    return id;
}

public int getLeagueId() {return league_id;}

public String getName() {
    return name;
}

public void setName(String name) {
    this.name = name;
}

public String getTimestamp() {
    return timestamp;
}

public void setId(int id) {
    this.id = id;
}

public void setLeagueId(int league_id) {
    this.league_id = league_id;
}

public void setTimestamp(String timestamp) {
    this.timestamp = timestamp;
}

}

---

如果您能提供任何指导，我们将不胜感激。

我相信您的问题在于，当您应该检索整数时，您正在发送一个整数，但试图获取一个字符串。因此，您应该使用：-

public class Main2Activity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate( savedInstanceState );
        setContentView( R.layout.league_id );
        Toolbar toolbar = (Toolbar) findViewById( R.id.toolbar );
        setSupportActionBar( toolbar );

        //String savedExtra = getIntent().getStringExtra( "value1" ); <<<< COMMENTED OUT
        String savedextra = String.valueOf(getIntent().getIntExtra("value1",-1)); //<<<< ADDED
    TextView myText = (TextView) findViewById(R.id.tvLeagueId);
        final String s = myText.toString();
        myText.setText(savedExtra);
    }
}

公共类Main2活动扩展了AppCompative活动{
@凌驾
创建时受保护的void（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）；
setContentView（R.layout.league_id）；
Toolbar Toolbar=（Toolbar）findViewById（R.id.Toolbar）；
设置支持操作栏（工具栏）；
//字符串savedExtra=getIntent（）.getStringExtra（“值1”）；通过交换我与您提供的代码行，我获得了LeagueId。我试图将int更改为long，但得到的结果是1，这意味着我传递了一个有效的意图，但为什么我不能像使用int一样看到实际的id号？您必须改为使用long-through（无论使用id在哪里），但只有当您超过2147483647行时，这才是一个问题。Lol高度怀疑会发生这种情况。谢谢