[챕터 2-4-6] 뷰 페이저

결과화면

터치해서 왼쪽으로 제스쳐해서 페이지 이동

또는 두번째 버튼 클릭 시

터치해서 왼쪽으로 제스쳐해서 페이지 이동

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아이디 : view_pager

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MainActivity.java

package org.minokuma.mypager;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.fragment.app.Fragment;
import androidx.fragment.app.FragmentManager;
import androidx.fragment.app.FragmentStatePagerAdapter;
import androidx.viewpager.widget.ViewPager;

import android.os.Bundle;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {

    ViewPager viewPager;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        viewPager = findViewById(R.id.view_pager);
        viewPager.setOffscreenPageLimit(3);


    }

    class MyPagerAdapter extends FragmentStatePagerAdapter {
        ArrayList<Fragment> items = new ArrayList<Fragment>();

        public MyPagerAdapter(FragmentManager fragmentManager) {
            super(fragmentManager);
        }

        public void addItem(Fragment fragment) {
            items.add(fragment);
        }

        @NonNull
        @Override
        public Fragment getItem(int position) {
            return items.get(position);
        }

        @Override
        public int getCount() {
            return items.size();
        }
    }

}

 

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파일명 : fragment1

 

 

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파일명 : Fragment1

슈퍼클래스 : androidx.fragment.app.Fragment

 

Fragment1.java

 

package org.minokuma.mytab2;

import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;

public class Fragment1 extends Fragment {
    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        return inflater.inflate(R.layout.fragment1, container, false);
    }
}

 

 

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res/layout/fragment1.xml 복사

res/layout/fragment2.xml 생성

 

 

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Fragment1.java 복사

Fragment2.java 생성

 

package org.minokuma.mytab2;

import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;

public class Fragment2 extends Fragment {
    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        return inflater.inflate(R.layout.fragment2, container, false);
    }
}

 

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fragment2.xml 복사

fragment3.xml 생성

 

 

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Fragment2.java 복사

Fragment3.java 생성

 

package org.minokuma.mytab2;

import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;

public class Fragment3 extends Fragment {
    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        return inflater.inflate(R.layout.fragment3, container, false);
    }
}

 

 

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MainActivity.java

 

package org.minokuma.mypager;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.fragment.app.Fragment;
import androidx.fragment.app.FragmentManager;
import androidx.fragment.app.FragmentStatePagerAdapter;
import androidx.viewpager.widget.ViewPager;

import android.os.Bundle;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {

    ViewPager viewPager;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        viewPager = findViewById(R.id.view_pager);
        viewPager.setOffscreenPageLimit(3);

        MyPagerAdapter myPagerAdapter = new MyPagerAdapter(getSupportFragmentManager());

        Fragment1 fragment1 = new Fragment1();
        myPagerAdapter.addItem(fragment1);

        Fragment2 fragment2 = new Fragment2();
        myPagerAdapter.addItem(fragment2);

        Fragment3 fragment3 = new Fragment3();
        myPagerAdapter.addItem(fragment3);

        viewPager.setAdapter(myPagerAdapter);


    }

    class MyPagerAdapter extends FragmentStatePagerAdapter {
        ArrayList<Fragment> items = new ArrayList<Fragment>();

        public MyPagerAdapter(FragmentManager fragmentManager) {
            super(fragmentManager);
        }

        public void addItem(Fragment fragment) {
            items.add(fragment);
        }

        @NonNull
        @Override
        public Fragment getItem(int position) {
            return items.get(position);
        }

        @Override
        public int getCount() {
            return items.size();
        }
    }

}

 

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MainActivity.java

 

package org.minokuma.mypager;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.fragment.app.Fragment;
import androidx.fragment.app.FragmentManager;
import androidx.fragment.app.FragmentStatePagerAdapter;
import androidx.viewpager.widget.ViewPager;

import android.os.Bundle;
import android.view.View;
import android.widget.Button;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {

    ViewPager viewPager;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        viewPager = findViewById(R.id.view_pager);
        viewPager.setOffscreenPageLimit(3);

        MyPagerAdapter myPagerAdapter = new MyPagerAdapter(getSupportFragmentManager());

        Fragment1 fragment1 = new Fragment1();
        myPagerAdapter.addItem(fragment1);

        Fragment2 fragment2 = new Fragment2();
        myPagerAdapter.addItem(fragment2);

        Fragment3 fragment3 = new Fragment3();
        myPagerAdapter.addItem(fragment3);

        viewPager.setAdapter(myPagerAdapter);

        Button button = findViewById(R.id.button);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                viewPager.setCurrentItem(1);
            }
        });

    }

    class MyPagerAdapter extends FragmentStatePagerAdapter {
        ArrayList<Fragment> items = new ArrayList<Fragment>();

        public MyPagerAdapter(FragmentManager fragmentManager) {
            super(fragmentManager);
        }

        public void addItem(Fragment fragment) {
            items.add(fragment);
        }

        @NonNull
        @Override
        public Fragment getItem(int position) {
            return items.get(position);
        }

        @Override
        public int getCount() {
            return items.size();
        }
    }

}