[안드로이드 기초] 프레그먼트로 이미지뷰 띄우기

프레그먼트로 이미지뷰 띄우기

#결과화면

#mainActivity.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    >
 
    <fragment
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:name="me.happygate.myfragment2.ListFragment"
        android:id="@+id/listFragment" />
 
    <fragment
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:name="me.happygate.myfragment2.ViewerFragment"
        android:id="@+id/viewFragment" />
 
</LinearLayout>
 

#mainActivity.java

package me.happygate.myfragment2;
 
import android.os.Bundle;
import android.support.v4.app.FragmentManager;
import android.support.v7.app.AppCompatActivity;
 
public class MainActivity extends AppCompatActivity {
 
    ListFragment fragment1;
    ViewerFragment fragment2;
    FragmentManager manager;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
 
        manager = getSupportFragmentManager();
 
        //프래그먼트메니져로 xml에 정의된 프래그먼트 찾기
        fragment1 = (ListFragment) manager.findFragmentById(R.id.listFragment);
        fragment2 = (ViewerFragment) manager.findFragmentById(R.id.viewFragment);
 
    }
 
    public void onImageChange(int index){
 
        fragment2.setImage(index);
 
    }
}
 

#listFragment.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">
 
    <Button
        android:id="@+id/button"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="image1" />
 
    <Button
        android:id="@+id/button2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="image2" />
 
    <Button
        android:id="@+id/button3"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="image3" />
</LinearLayout>

#listFragment.java

package me.happygate.myfragment2;
 
import android.content.Context;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
 
/**
 * Created by kang on 2017-08-17.
 */
 
public class ListFragment extends Fragment {
    MainActivity activity;
    @Override
    public void onAttach(Context context) {
        super.onAttach(context);
 
        activity=(MainActivity)getActivity();
    }
 
    @Override
    public void onDetach() {
        super.onDetach();
        activity = null;
    }
 
    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        ViewGroup rootView=(ViewGroup)inflater.inflate(R.layout.fragment_list,container,false);
 
 
        Button button =(Button)rootView.findViewById(R.id.button);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
 
            activity.onImageChange(0);
 
            }
        });
 
 
        Button button2 =(Button)rootView.findViewById(R.id.button2);
        button2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                activity.onImageChange(1);
            }
        });
 
 
        Button button3 =(Button)rootView.findViewById(R.id.button3);
        button3.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                activity.onImageChange(2);
            }
        });
 
 
        return rootView;
    }
}
 

#viewFragment.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">
 
    <ImageView
        android:id="@+id/imageView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:src="@drawable/a" />
</LinearLayout>

#viewFragment.java

package me.happygate.myfragment2;
 
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
 
/**
 * Created by kang on 2017-08-17.
 */
 
public class ViewerFragment extends Fragment {
 
    ImageView imageView;
 
    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        ViewGroup rootView=(ViewGroup)inflater.inflate(R.layout.fragment_viewer,container,false);
 
         imageView = (ImageView)rootView.findViewById(R.id.imageView);
 
        return rootView;
    }
 
 
    public void setImage(int index){
 
        if (index==0){
            imageView.setImageResource(R.drawable.a);
        }else if(index==1){
            imageView.setImageResource(R.drawable.d);
        }else if (index==2){
            imageView.setImageResource(R.drawable.e);
        }
 
 
    }
}
 

#사진파일은 drawable 폴더에