농부지기

public class MainActivity extends AppCompatActivity {

        Button btn_move_page1;
        Button btn_move_page2;
        Button btn_move_page3;

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

            setup();

            movePage1();
        }
        private void setup()
        {
            btn_move_page1 = (Button) findViewById(R.id.btn_move_page1);
            btn_move_page2 = (Button) findViewById(R.id.btn_move_page2);
            btn_move_page3 = (Button) findViewById(R.id.btn_move_page3);

            btn_move_page1.setOnClickListener(myListener);
            btn_move_page2.setOnClickListener(myListener);
            btn_move_page3.setOnClickListener(myListener);
        }

        View.OnClickListener myListener = new View.OnClickListener(){
            @Override
            public void onClick(View view) {
                btn_move_page1.setSelected(false);
                btn_move_page2.setSelected(false);
                btn_move_page3.setSelected(false);

                switch (view.getId()){
                    case R.id.btn_move_page1:
                        movePage1();
                        break;
                    case R.id.btn_move_page2:
                        movePage2();
                        break;
                    case R.id.btn_move_page3:
                        movePage3();
                        break;
                }
            }
        };



        public void movePage1(){
            Page1 page1 = new Page1();
            //FragmentManager : Activity위(안)에서 Fragment와 Activity의 상호작용을 관리
            FragmentManager fragmentManager = getFragmentManager();

            //FragmentTransaction
            //  - 실질적으로 이 Transaction이  Activity위에 Fragment를 올려주고(add) 있던걸 빼고
            //    다시올리고(replace)  제거해주고(remove)  commit등 여러가지 중요한  활동이 가능하게 도와준다.
            FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
            fragmentTransaction.replace(R.id.ll_page, page1);
            fragmentTransaction.commit();
        }

        public void movePage2(){
            Page2 page2 = new Page2();
            FragmentManager fragmentManager = getFragmentManager();
            FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
            fragmentTransaction.replace(R.id.ll_page, page2);
            fragmentTransaction.commit();
        }

        public void movePage3(){
            Page3 page3 = new Page3();
            FragmentManager fragmentManager = getFragmentManager();
            FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
            fragmentTransaction.replace(R.id.ll_page, page3);
            fragmentTransaction.commit();
        }

        //버튼 하단에 있는 LinearLayout에 보여줄 페이지 처리
        // - 이때 Activity라면 AppCompatActivity 를 extends 받아야 된다.
        // - extends를 Fragment로 하면서 Activity가 아니라 Fragment임을 알 수 있다.
        //   또한 onCreate()메소드가 아닌 onCreateView()메소드를 이용했다.
        public static class Page1 extends Fragment {
            @Override
            public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
                //화면을 가져오기 위해서 LayoutInflater 객체를 이용했다.
                //  - inflate() : xml을 실제 객체로 사용가능하게 하는 역할을 담당
                View view = inflater.inflate(R.layout.fragment_page1, container, false);
                return view;
            }
        }
        public static class Page2 extends Fragment {
            @Override
            public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
                View view = inflater.inflate(R.layout.fragment_page2, container, false);
                return view;
            }
        }
        public static class Page3 extends Fragment {
            @Override
            public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
                View view = inflater.inflate(R.layout.fragment_page3, container, false);
                return view;
            }
        }

}

 public class MainActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        //activity_main.xml layout에 존재하는 textView 얻기
        TextView tv_text = (TextView)findViewById(R.id.tv_text);

        //LayoutInflater 객체 생성
        LayoutInflater inflater = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View view = inflater.inflate(R.layout.activity_sub, null);

        //activity_sub.xml layout에 존재하는 Button, TextView 객체 생성(얻기)
        Button btn = (Button)view.findViewById(R.id.btn);
        TextView tv = (TextView)view.findViewById(R.id.tv);

        //activity_main.xml layout의 textView에    activity_sub.xml layout에 존재하는  값을 얻어와서 보여주기
        tv_text.setText( "버튼에 써있는 글자는 ["+btn.getText().toString()+"]이고\n"

                         +"텍스트뷰에 써있는 글자는 ["+tv.getText().toString()+"]이다");
    }
}

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:color="#301500" android:state_selected="true" />
    <item android:color="#8C8C8C" />
</selector>

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
    <item>
        <shape android:shape="rectangle">
            <padding
                android:bottom="2dp"
                />
            <solid android:color="#8C8C8C" />
        </shape>
    </item>

    <item>
        <shape android:shape="rectangle" >
            <solid android:color="#EAEAEA" />
        </shape>
    </item>
</layer-list>

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
    <item>
        <shape android:shape="rectangle">
            <padding
                android:bottom="5dp"
                />
            <solid android:color="#301500" />
        </shape>
    </item>

    <item>
        <shape android:shape="rectangle" >
            <solid android:color="#EAEAEA" />
        </shape>
    </item>
</layer-list>

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

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:background="#000000"
    >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true"
        android:textSize="30dp"
        android:textColor="#FFFFFF"
        android:textStyle="bold"
        android:text="첫번째 페이지"/>

</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:background="#000000"
    >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true"
        android:textSize="30dp"
        android:textColor="#FFFFFF"
        android:textStyle="bold"
        android:text="첫번째 페이지"/>

</RelativeLayout> 

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    >
    <LinearLayout
        android:id="@+id/ll"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">
        <TextView
            android:id="@+id/tab_first"
            android:layout_width="0dip"
            android:layout_height="50dp"
            android:layout_weight="1"
            android:gravity="center"
            android:textColor="@drawable/tab_color_selector"
            android:background="@drawable/tab_bg_selector"
            android:text="친구" />

        <TextView
            android:id="@+id/tab_second"
            android:layout_width="0dip"
            android:layout_height="50dp"
            android:layout_weight="1"
            android:gravity="center"
            android:textColor="@drawable/tab_color_selector"
            android:background="@drawable/tab_bg_selector"
            android:text="채팅방" />

        <TextView
            android:id="@+id/tab_third"
            android:layout_width="0dip"
            android:layout_height="50dp"
            android:layout_weight="1"
            android:gravity="center"
            android:textColor="@drawable/tab_color_selector"
            android:background="@drawable/tab_bg_selector"
            android:text="설정" />
    </LinearLayout>

    <android.support.v4.view.ViewPager
        android:id="@+id/vp"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_below="@+id/ll">
    </android.support.v4.view.ViewPager>

</RelativeLayout>

package org.example.farmkim.study001;

import android.os.Bundle;
import android.support.v4.app.FragmentStatePagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.LinearLayout;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity
{
    ViewPager vp;
    LinearLayout ll;
    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        vp = (ViewPager)findViewById(R.id.vp);
        ll = (LinearLayout)findViewById(R.id.ll);

        //ActionBar 역할을 TextView
        TextView tab_first = (TextView)findViewById(R.id.tab_first);
        TextView tab_second = (TextView)findViewById(R.id.tab_second);
        TextView tab_third = (TextView)findViewById(R.id.tab_third);

        //ViewPage객체에 Adapter 연결
        //이때, ViewPage에 Fragment가 연동된다.
        vp.setAdapter(new pagerAdapter(getSupportFragmentManager()));
        vp.setCurrentItem(0);

        //tab에 OnClick Event설정 및 Tag 값 지정
        tab_first.setOnClickListener(movePageListener);
        tab_first.setTag(0);
        tab_second.setOnClickListener(movePageListener);
        tab_second.setTag(1);
        tab_third.setOnClickListener(movePageListener);
        tab_third.setTag(2);

        tab_first.setSelected(true);

        //ViewPage에  Page가 변경될때 호출되는 Event 추가.
        vp.addOnPageChangeListener(new ViewPager.OnPageChangeListener()
        {
            @Override
            public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels)
            {

            }

            @Override
            public void onPageSelected(int position)
            {
                int i = 0;
                while(i<3)
                {
                    if(position==i)
                    {
                        ll.findViewWithTag(i).setSelected(true);
                    }
                    else
                    {
                        ll.findViewWithTag(i).setSelected(false);
                    }
                    i++;
                }
            }

            @Override
            public void onPageScrollStateChanged(int state)
            {

            }
        });
    }

    //Tab역할을 하는 상단 TextView를 클릭 시 Event
    View.OnClickListener movePageListener = new View.OnClickListener()
    {
        @Override
        public void onClick(View v)
        {
            int tag = (int) v.getTag();

            int i = 0;
            while(i<3)
            {
                if(tag==i)
                {
                    //특정 Component를 선택해준다.
                    //그럴경우, drawable안에  xml에 <selector>tag안에  state_selected="true" 속성을 찾아서 style을 적용한다.
                    ll.findViewWithTag(i).setSelected(true);
                }
                else
                {
                    ll.findViewWithTag(i).setSelected(false);
                }
                i++;
            }

            vp.setCurrentItem(tag);
        }
    };

    //ViewPager객체에 Adapter 연결.
    private class pagerAdapter extends FragmentStatePagerAdapter
    {
        public pagerAdapter(android.support.v4.app.FragmentManager fm)
        {
            super(fm);
        }
        @Override
        public android.support.v4.app.Fragment getItem(int position)
        {
            switch(position)
            {
                case 0:
                    return new FirstFragment();
                case 1:
                    return new SecondFragment();
                case 2:
                    return new ThirdFragment();
                default:
                    return null;
            }
        }
        @Override
        public int getCount()
        {
            return 3;
        }
    }
}