使用TabLayout，如何限制每个userType的选项卡数量？

问题描述

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>

解决方法

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android android android-fragments android-tablayout firebase firebase firebase java java