如何解决使用TabLayout，如何限制每个userType的选项卡数量？
我正在使用一种叫做spaceTabLayout的东西，我已经阅读了github的要求，并试图在我的应用程序中实现它，但一切正常，但是目前使用firebase的每个用户都有一个userType属性，该属性将定义用户是否是“访客，囚犯，基于该角色的“官员”或“管理员”，我想用它隐藏一些标签，并显示与其他角色不同的标签。
下面的代码是MainActivity，它是我getCurrentUser从模型中获取userType属性的地方，但是由于SpaceTabLayout的代码，它说“您有5个标签”是非法参数，我不能少于5个标签。
MainActivity.class
package com.example.virtualmeetingapp;
import android.os.Bundle;
import android.view.View;
import android.widget.Toast;
import androidx.appcompat.app.AppCompatActivity;
import androidx.coordinatorlayout.widget.CoordinatorLayout;
import androidx.fragment.app.Fragment;
import com.example.virtualmeetingapp.Model.User;
import com.example.virtualmeetingapp.SpaceTabLayout.SpaceTabLayout;
import com.example.virtualmeetingapp.SpaceTabLayout.fragments.FragmentA;
import com.example.virtualmeetingapp.SpaceTabLayout.fragments.FragmentB;
import com.example.virtualmeetingapp.SpaceTabLayout.fragments.FragmentC;
import com.example.virtualmeetingapp.SpaceTabLayout.fragments.FragmentD;
import com.example.virtualmeetingapp.SpaceTabLayout.fragments.FragmentE;
import com.example.virtualmeetingapp.utils.Global;
import com.google.android.material.snackbar.Snackbar;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.FirebaseUser;
import java.util.ArrayList;
import java.util.List;
import carbon.widget.ViewPager;
public class MainActivity extends AppCompatActivity {
SpaceTabLayout tabLayout;
User userType;
FirebaseAuth auth;
FirebaseUser firebaseUser;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
firebaseUser = FirebaseAuth.getInstance().getCurrentUser();
userType = Global.getCurrentUser();
//add the fragments you want to display in a List
List<Fragment> fragmentList = new ArrayList<>();
if (userType != null) {
if (userType.getUserType().equals("admin")) {
fragmentList.add(new FragmentA());
fragmentList.add(new FragmentB());
fragmentList.add(new FragmentC());
fragmentList.add(new FragmentD());
fragmentList.add(new FragmentE());
} else if (userType.getUserType().equals("officer")) {
fragmentList.add(new FragmentA());
fragmentList.add(new FragmentB());
fragmentList.add(new FragmentC());
fragmentList.add(new FragmentD());
} else if (userType.getUserType().equals("inmate")) {
fragmentList.add(new FragmentA());
fragmentList.add(new FragmentB());
fragmentList.add(new FragmentC());
} else {
fragmentList.add(new FragmentA());
fragmentList.add(new FragmentB());
}
}
else {
fragmentList.add(new FragmentA());
fragmentList.add(new FragmentB());
fragmentList.add(new FragmentC());
fragmentList.add(new FragmentD());
fragmentList.add(new FragmentE());
}
final CoordinatorLayout coordinatorLayout = (CoordinatorLayout) findViewById(R.id.activity_main);
ViewPager viewPager = (ViewPager) findViewById(R.id.viewPager);
tabLayout = (SpaceTabLayout) findViewById(R.id.spaceTabLayout);
tabLayout.initialize(viewPager,getSupportFragmentManager(),fragmentList);
tabLayout.setTabOneOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Snackbar snackbar = Snackbar
.make(coordinatorLayout,"Welcome to SpaceTabLayout",Snackbar.LENGTH_SHORT);
snackbar.show();
}
});
tabLayout.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(getApplication(),"" + tabLayout.getCurrentPosition(),Toast.LENGTH_SHORT).show();
}
});
}
}
这是SpaceTabLayout.class代码，用于计算程序并将图标和文本添加到程序中，并且错误发生在“ initialize”方法所在的位置，如果我使用的选项卡少于5个，则会触发该错误。
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.virtualmeetingapp/com.example.virtualmeetingapp.MainActivity}: java.lang.IllegalArgumentException: You have 5 tabs.
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2327)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2392)
at android.app.ActivityThread.access$800(ActivityThread.java:153)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1305)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5305)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
Caused by: java.lang.IllegalArgumentException: You have 5 tabs.
at com.example.virtualmeetingapp.SpaceTabLayout.SpaceTabLayout.initialize(SpaceTabLayout.java:276)
at com.example.virtualmeetingapp.MainActivity.onCreate(MainActivity.java:89)
at android.app.Activity.performCreate(Activity.java:5990)
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.coordinatorlayout.widget.CoordinatorLayout 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:id="@+id/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#292929"
tools:context=".MainActivity">
<carbon.widget.ViewPager
android:id="@+id/viewPager"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="56dp" />
<com.example.virtualmeetingapp.SpaceTabLayout.SpaceTabLayout
android:id="@+id/spaceTabLayout"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_behavior="com.example.virtualmeetingapp.SpaceTabLayout.SpaceTabLayoutBehavior"
app:number_of_tabs="five"
app:starting_position="one" />
</androidx.coordinatorlayout.widget.CoordinatorLayout>
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