이 예는 Kotlin을 사용하여 Android 앱에서 탭 레이아웃을 만드는 방법을 보여줍니다.
1단계 − Android Studio에서 새 프로젝트를 만들고 파일로 이동하시겠습니까? 새 프로젝트를 만들고 새 프로젝트를 만드는 데 필요한 모든 세부 정보를 입력합니다.
2단계 − res/layout/activity_main.xml에 다음 코드를 추가합니다.
예시
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="https://schemas.android.com/apk/res/android" xmlns:tools="https://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".MainActivity"> <com.google.android.material.tabs.TabLayout android:id="@+id/tabLayout" android:layout_width="match_parent" android:layout_height="wrap_content" android:background="#1db995"> </com.google.android.material.tabs.TabLayout> <androidx.viewpager.widget.ViewPager android:id="@+id/viewPager" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@id/tabLayout" android:layout_centerInParent="true" android:layout_marginTop="100dp" tools:layout_editor_absoluteX="8dp" /> </RelativeLayout>
3단계 − src/MainActivity.kt에 다음 코드 추가
import android.os.Bundle import androidx.appcompat.app.AppCompatActivity import androidx.viewpager.widget.ViewPager import com.google.android.material.tabs.TabLayout import com.google.android.material.tabs.TabLayout.OnTabSelectedListener import com.google.android.material.tabs.TabLayout.TabLayoutOnPageChangeListener class MainActivity : AppCompatActivity() { lateinit var tabLayout: TabLayout lateinit var viewPager: ViewPager override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) title = "KotlinApp" tabLayout = findViewById(R.id.tabLayout) viewPager = findViewById(R.id.viewPager) tabLayout.addTab(tabLayout.newTab().setText("Football")) tabLayout.addTab(tabLayout.newTab().setText("Cricket")) tabLayout.addTab(tabLayout.newTab().setText("NBA")) tabLayout.tabGravity = TabLayout.GRAVITY_FILL val adapter = MyAdapter(this, supportFragmentManager, tabLayout.tabCount) viewPager.adapter = adapter viewPager.addOnPageChangeListener(TabLayoutOnPageChangeListener(tabLayout)) tabLayout.addOnTabSelectedListener(object : OnTabSelectedListener { override fun onTabSelected(tab: TabLayout.Tab) { viewPager.currentItem = tab.position } override fun onTabUnselected(tab: TabLayout.Tab) {} override fun onTabReselected(tab: TabLayout.Tab) {} }) } }재정의
4단계 − 새 어댑터 kotlin 클래스(MyAdapter.kt)를 만들고 다음 코드를 추가합니다. −
import android.content.Context import androidx.fragment.app.Fragment import androidx.fragment.app.FragmentManager import androidx.fragment.app.FragmentPagerAdapter @Suppress("DEPRECATION") internal class MyAdapter( var context: Context, fm: FragmentManager, var totalTabs: Int ) : FragmentPagerAdapter(fm) { override fun getItem(position: Int): Fragment { return when (position) { 0 -> { Football() } 1 -> { Cricket() } 2 -> { NBA() } else -> getItem(position) } } override fun getCount(): Int { return totalTabs } }
5단계 − 3개의 Fragment 활동(Cricket, Football, NBA - 귀하의 이름을 가질 수 있음) 및 다음 코드 생성 −
Cricket.kt
import android.os.Bundle import android.view.LayoutInflater import android.view.View import android.view.ViewGroup import androidx.fragment.app.Fragment class Cricket : Fragment() { override fun onCreateView( inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle? ): View? { // Inflate the layout for this fragment return inflater.inflate(R.layout.fragment_cricket, container, false) } }
fragment_cricket.xml
<?xml version="1.0" encoding="utf-8"?> <FrameLayout xmlns:android="https://schemas.android.com/apk/res/android" xmlns:tools="https://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".Cricket"> <!-- TODO: Update blank fragment layout --> <TextView android:layout_width="match_parent" android:layout_height="match_parent" android:text="Cricket Fragment" android:textAlignment="center" android:textSize="16sp" android:textStyle="bold" /> </FrameLayout>
Football.kt
import android.os.Bundle import android.view.LayoutInflater import android.view.View import android.view.ViewGroup import androidx.fragment.app.Fragment class Football : Fragment() { override fun onCreateView( inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle? ): View? { // Inflate the layout for this fragment return inflater.inflate(R.layout.fragment_football, container, false) } }
fragment_footbal.xml
<?xml version="1.0" encoding="utf-8"?> <FrameLayout xmlns:android="https://schemas.android.com/apk/res/android" xmlns:tools="https://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".Football"> <!-- TODO: Update blank fragment layout --> <TextView android:layout_width="match_parent" android:layout_height="match_parent" android:text="Football Fragment" android:textAlignment="center" android:textSize="16sp" android:textStyle="bold" /> </FrameLayout>
NBA.kt
import android.os.Bundle import androidx.fragment.app.Fragment import android.view.LayoutInflater import android.view.View import android.view.ViewGroup class NBA : Fragment() { override fun onCreateView( inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle? ): View? { // Inflate the layout for this fragment return inflater.inflate(R.layout.fragment_n_b_a, container, false) } }
fragment_n_b_a.xml
<?xml version="1.0" encoding="utf-8"?> <FrameLayout xmlns:android="https://schemas.android.com/apk/res/android" xmlns:tools="https://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".NBA"> <!-- TODO: Update blank fragment layout --> <TextView android:layout_width="match_parent" android:layout_height="match_parent" android:text="NBA Fragment" android:textAlignment="center" android:textSize="16sp" android:textStyle="bold" /> </FrameLayout>
6단계 − androidManifest.xml에 다음 코드 추가
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="https://schemas.android.com/apk/res/android" package="com.example.q11"> <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:roundIcon="@mipmap/ic_launcher_round" android:supportsRtl="true" android:theme="@style/AppTheme"> <activity android:name=".MainActivity"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> </manifest>
응용 프로그램을 실행해 보겠습니다. 실제 Android 모바일 장치를 컴퓨터에 연결했다고 가정합니다. Android 스튜디오에서 앱을 실행하려면 프로젝트의 활동 파일 중 하나를 열고 실행 아이콘을 클릭하세요. 도구 모음에서. 모바일 장치를 옵션으로 선택한 다음 기본 화면을 표시할 모바일 장치를 확인하십시오.