Java 正在尝试将用户标识从活动发送到viewholder片段

我已经创建了一个android应用程序，在其中我添加了一个名为profileview.java的活动，用户可以在该活动上查看那里或其他用户的个人资料数据。Profileview活动包含两个片段post和LIKE，我必须在其中显示用户发布的帖子和用户喜欢的帖子，但不知道如何将用户ID从Profileview活动发送到其他两个片段

profileviewactivity.class

 public class profileviewActivity extends AppCompatActivity {
  public String userid;
  private ViewPager viewPager;
  private TabLayout tabLayout;
  private settingtabAdopter Tabadapter;
   protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_profileview);

    viewPager = (ViewPager) findViewById(R.id.viewpager);
    Tabadapter = new settingtabAdopter(getSupportFragmentManager());
    viewPager.setAdapter(Tabadapter);

    tabLayout = (TabLayout) findViewById(R.id.tablayout);
    tabLayout.setupWithViewPager(viewPager);

    userid = getIntent().getExtras().get("userid").toString();
  }
}

settingadapter.java

public class settingtabAdopter extends FragmentPagerAdapter {
public settingtabAdopter(@NonNull FragmentManager fm) {
    super(fm);
}

@NonNull
@Override
public Fragment getItem(int position) {
    switch (position){
        case 0:
            posttimeline postfragment = new posttimeline();
            return postfragment;
        case 1:
            like chatfragment = new like();
            return chatfragment;
        default:
            return null;
    }
}

@Override
public int getCount() {
    return 2;
}

@Nullable
@Override
public CharSequence getPageTitle(int i) {
    switch (i){
        case 0:
            return "Posts";
        case 1:
            return "Likes";
        default:
            return null;
    }
}
}

posttimeline.java

  public class posttimeline extends Fragment {
  View posttimelineview;
   public posttimeline() {
    // Required empty public constructor
}


@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // Inflate the layout for this fragment
   posttimelineview =  inflater.inflate(R.layout.fragment_posttimeline, container, false);
   return posttimelineview;
  }
}

like.java

 public class like extends Fragment {
 View Likeview;
  public like() {
    // Required empty public constructor
}


@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // Inflate the layout for this fragment
    Likeview = inflater.inflate(R.layout.fragment_like, container, false);
 return Likeview;
}
}

我想把用户ID从ProfileAvieWavity发送到posttimeline之类的片段

将

userid

作为参数传递给

settingtabadapter

constructor

public settingtabAdopter(@NonNull FragmentManager fm, String userid) 

profileviewActivity->onCreate

Tabadapter = new settingtabAdopter(getSupportFragmentManager(), userid);

在

settingtabadapter

private String userid;

在构造函数中初始化它

this.userid = userid

在每个片段中创建私有变量，并添加setter（posttimeline等）片段

private String mUserid;
void setMUserId(String mUserid){
    this.mUserid = mUserid;
}

初始化每个片段后，在

settingtabadapter

内部

getItem

函数上，使用

userid设置私有变量

public Fragment getItem(int position) {
    switch (position){
        case 0:
            posttimeline postfragment = new posttimeline();
            postfragment.setMUserId(userid)
            return postfragment;
        case 1:
            like chatfragment = new like();
            chatfragment.setMUserId(userid)
            return chatfragment;
        default:
            return null;
    }
}

---

在

getItem

上，您具有切换条件，可以使用

bundle

和

fragment

将数据发送到

fragment

，并可以在

fragment

上获取该数据，然后如何将用户ID发送到设置选项卡适配器，以及