<selector> + ViewPager2 + TabLayout

Android/XML

<selector> + ViewPager2 + TabLayout

혀가 길지 않은 개발자 2020. 8. 4. 15:27

build.gradle (Module: app)

dependencies {
    // ViewPager2
    implementation 'androidx.viewpager2:viewpager2:1.0.0'
    // material design (TabLayout)
    implementation 'com.google.android.material:material:1.1.0'
}

res/drawable 에 이미지 추가

Drawable Resource File 추가

ic_main_tab_home.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_selected="true" android:drawable="@drawable/ic_main_tab_home_selected" />
    <item android:state_selected="false" android:drawable="@drawable/ic_main_tab_home_normal" />
</selector>

ic_main_tab_study.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_selected="true" android:drawable="@drawable/ic_main_tab_study_selected" />
    <item android:state_selected="false" android:drawable="@drawable/ic_main_tab_study_normal" />
</selector>

ic_main_tab_my.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_selected="true" android:drawable="@drawable/ic_main_tab_my_selected" />
    <item android:state_selected="false" android:drawable="@drawable/ic_main_tab_my_normal" />
</selector>

viewpager_fragment.xml

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_gravity="center">

    <TextView
        android:id="@+id/tvType"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:textAlignment="center"
        android:hint="fragment"
        android:textSize="30dp"
        android:textStyle="italic"/>

</FrameLayout>

ViewPagerFragmentHome.kt

package com.jwsoft.kotlinproject

import android.os.Bundle
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.TextView
import androidx.fragment.app.Fragment

class ViewPagerFragmentHome : Fragment() {

    override fun onCreateView(
        inflater: LayoutInflater,
        container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {
        return inflater.inflate(R.layout.viewpager_fragment, container, false)
    }

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)

        var tvType: TextView = view.findViewById(R.id.tvType)
        tvType.text = "Home"
    }

}

ViewPagerFragmentStudy.kt

package com.jwsoft.kotlinproject

import android.os.Bundle
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.TextView
import androidx.fragment.app.Fragment

class ViewPagerFragmentStudy : Fragment() {

    override fun onCreateView(
        inflater: LayoutInflater,
        container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {
        return inflater.inflate(R.layout.viewpager_fragment, container, false)
    }

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)

        var tvType: TextView = view.findViewById(R.id.tvType)
        tvType.text = "Study"
    }

}

ViewPagerFragmentMy.kt

package com.jwsoft.kotlinproject

import android.os.Bundle
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.TextView
import androidx.fragment.app.Fragment

class ViewPagerFragmentMy : Fragment() {

    override fun onCreateView(
        inflater: LayoutInflater,
        container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {
        return inflater.inflate(R.layout.viewpager_fragment, container, false)
    }

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)

        var tvType: TextView = view.findViewById(R.id.tvType)
        tvType.text = "My"
    }

}

ViewPagerFragmentAdapter.kt

package com.jwsoft.kotlinproject

import androidx.fragment.app.Fragment
import androidx.fragment.app.FragmentActivity
import androidx.viewpager2.adapter.FragmentStateAdapter

class ViewPagerFragmentAdapter(fragmentActivity: FragmentActivity) : FragmentStateAdapter(fragmentActivity) {

    private val TYPE_HOME = 0
    private val TYPE_STUDY = 1
    private val TYPE_MY = 2

    private var listType: List<Int> = listOf(TYPE_HOME, TYPE_STUDY, TYPE_MY)

    override fun getItemCount(): Int {
        return listType.size
    }

    override fun createFragment(position: Int): Fragment {
        return when (position) {
            TYPE_HOME -> ViewPagerFragmentHome()
            TYPE_STUDY -> ViewPagerFragmentStudy()
            else -> ViewPagerFragmentMy()
        }
    }

}

tab_item.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center">

    <ImageView
        android:id="@+id/ivTab"
        android:layout_width="36dp"
        android:layout_height="36dp"
        android:src="@drawable/ic_main_tab_home" />

</LinearLayout>

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity">

    <androidx.viewpager2.widget.ViewPager2
        android:id="@+id/viewPager2"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"/>

    <View
        android:layout_width="match_parent"
        android:layout_height="0.5dp"
        android:background="@android:color/black" />

    <com.google.android.material.tabs.TabLayout
        android:id="@+id/tabLayout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

</LinearLayout>

MainActivity.kt

package com.jwsoft.kotlinproject

import android.content.Context
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.view.LayoutInflater
import android.view.View
import android.widget.ImageView
import androidx.viewpager2.widget.ViewPager2
import com.google.android.material.tabs.TabLayoutMediator
import kotlinx.android.synthetic.main.activity_main.*

class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        var adapter = ViewPagerFragmentAdapter(this)
        viewPager2.adapter = adapter
        viewPager2.orientation = ViewPager2.ORIENTATION_HORIZONTAL

        TabLayoutMediator(tabLayout, viewPager2) { tab, position ->
            tab.customView = getTabView(position)
        }.attach()
    }

    fun getTabView(position: Int): View {
        val inflater = getSystemService(Context.LAYOUT_INFLATER_SERVICE) as LayoutInflater
        val view = inflater.inflate(R.layout.tab_item, null, false)
        val ivTab = view.findViewById<ImageView>(R.id.ivTab)

        when (position) {
            0 -> ivTab.setImageResource(R.drawable.ic_main_tab_home)
            1 -> ivTab.setImageResource(R.drawable.ic_main_tab_study)
            else -> ivTab.setImageResource(R.drawable.ic_main_tab_my)
        }

        return view
    }

}

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