네이버API를 이용한 블로그 검색,링크,더보기

제목을 누르면 제목을 가지고 가서 새창에 출력됩니다.

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.ex16.MainActivity">
    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/edtsearch"
        android:hint="검색어 입력"
        android:padding="10sp"/>
    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/ic_search"
        android:layout_alignParentRight="true"/>
    <androidx.recyclerview.widget.RecyclerView
        android:layout_below="@id/edtsearch"
        android:id="@+id/list"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>
    <com.google.android.material.floatingactionbutton.FloatingActionButton
        android:id="@+id/btnmore"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:clickable="true"
        app:srcCompat="@drawable/ic_more"
        android:layout_alignParentRight="true"
        android:layout_alignParentBottom="true"
        android:layout_marginRight="20sp"
        android:layout_marginBottom="20sp"/>
</RelativeLayout>

item.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    android:padding="10sp"
    android:background="#9bbbd4">
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="여기는 제목이 출력됩니다."
        android:textSize="15sp"
        android:textColor="#000000"
        android:singleLine="true"
        android:id="@+id/txttitle"
        android:background="#ffffff"
        android:padding="10sp"/>
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="여기는 내용이 출력됩니다."
        android:textSize="12sp"
        android:textColor="#000000"
        android:singleLine="true"
        android:id="@+id/txtdesc"
        android:padding="10sp"/>
</LinearLayout>

NaverAPI.java

package com.example.ex16;
import java.net.*;
import  java.io.*;
public class NaverAPI {
    //결과 값을 받기 위해서 return
    public static String main(String query,int start) {
        //static: 클래스 생성없이 메서드 사용가능
        String clientId = "r_XLF45OBi3Xw08BTmvq";//애플리케이션 클라이언트 아이디값";
        String clientSecret = "DjUKEbgt13";//애플리케이션 클라이언트 시크릿값";
        try {
            String text = URLEncoder.encode(query, "UTF-8");
            String apiURL = "https://openapi.naver.com/v1/search/blog?query="+ text; // json 결과
            //String apiURL = "https://openapi.naver.com/v1/search/blog.xml?query="+ text; // xml 결과
            apiURL += "&start=" + start;

            URL url = new URL(apiURL);
            HttpURLConnection con = (HttpURLConnection)url.openConnection();
            con.setRequestMethod("GET");
            con.setRequestProperty("X-Naver-Client-Id", clientId);
            con.setRequestProperty("X-Naver-Client-Secret", clientSecret);
            int responseCode = con.getResponseCode();
            BufferedReader br;
            if(responseCode==200) { // 정상 호출
                br = new BufferedReader(new InputStreamReader(con.getInputStream()));
            } else {  // 에러 발생
                br = new BufferedReader(new InputStreamReader(con.getErrorStream()));
            }
            String inputLine;
            StringBuffer response = new StringBuffer();
            while ((inputLine = br.readLine()) != null) {
                response.append(inputLine);
            }
            br.close();
            System.out.println(response.toString());
            return response.toString();
        } catch (Exception e) {
            System.out.println(e);
            return e.toString();
        }
    }
}

MainActivity.java

package com.example.ex16;

import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;

import android.os.AsyncTask;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.View;
import android.widget.EditText;

import com.example.ex16.R;
import com.google.android.material.floatingactionbutton.FloatingActionButton;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {
    int start=1;
    //초기값 설정

    RecyclerView list;
    BlogAdapter adapter;


    String query="커피";


    //데이터 저장할 곳
    ArrayList<BlogVO> array;
    //NaverAPI를 실행하는 곳
    //Thread:작업
    //멀티
    //MainThread
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        getSupportActionBar().setTitle("블로그 검색");

        list=findViewById(R.id.list);
        LinearLayoutManager manager=new LinearLayoutManager(this);
        list.setLayoutManager(manager);



        array=new ArrayList<BlogVO>();
        //MainActivity가 실행이 될때 NaverThread 실행
        new NaverThread().execute();

        final EditText edtsearch=findViewById(R.id.edtsearch);
        edtsearch.setOnKeyListener(new View.OnKeyListener() {
            @Override
            public boolean onKey(View v, int keyCode, KeyEvent event) {
                start =1;
                array.clear();
                query=edtsearch.getText().toString();
                //Toast.makeText(MainActivity.this,query,Toast.LENGTH_SHORT).show();
                new NaverThread().execute();
                return false;
            }
        });
        FloatingActionButton btnmore=findViewById(R.id.btnmore);
        btnmore.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                start += 10;
                new NaverThread().execute();
            }
        });
    }
    //BackThread
    class NaverThread extends AsyncTask<String, String, String>{

        //doinbackground실행후 post로 감
        @Override
        protected String doInBackground(String... strings) {
            //결과값이 콘솔에만 찍힘->결과값을 받기위해 리턴
            //NaverAPI.main(query);

            //array생성

            return NaverAPI.main(query,start);
        }

        @Override
        protected void onPostExecute(String s) {
            super.onPostExecute(s);
            System.out.println("결과:" +s);

            //결과를 하나씩 분석
            //데이터 만듦
            try {
                //items값을 가져온다.
                JSONArray jArray=new JSONObject(s).getJSONArray("items");
                for(int i=0; i<jArray.length(); i++){
                    //하나씩 하나씩 꺼내오는 것은 object
                    JSONObject obj=jArray.getJSONObject(i);
                    BlogVO vo=new BlogVO();
                    vo.setTitle(obj.getString("title"));
                    vo.setDescription(obj.getString("description"));
                    vo.setLink(obj.getString("link"));
                    array.add(vo);
                    System.out.println(vo.toString());
                }
            } catch (JSONException e) {
                e.printStackTrace();
            }
            adapter=new BlogAdapter(array,MainActivity.this);
            list.setAdapter(adapter);
            list.scrollToPosition(start);
        }
    }


}

BlogVO.java

package com.example.ex16;

public class BlogVO {
    private String title;
    private String link;
    private String description;


    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public String getLink() {
        return link;
    }

    public void setLink(String link) {
        this.link = link;
    }

    public String getDescription() {
        return description;
    }

    public void setDescription(String description) {
        this.description = description;
    }


    @Override
    public String toString() {
        return "BlogVO{" +
                "title='" + title + '\'' +
                ", link='" + link + '\'' +
                ", description='" + description + '\'' +
                '}';
    }
}

BlogAdapter.java

package com.example.ex16;

import android.content.Context;
import android.content.Intent;
import android.text.Html;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;

import com.example.ex16.R;

import java.util.ArrayList;

public class BlogAdapter extends RecyclerView.Adapter<BlogAdapter.ViewHolder> {
    ArrayList<BlogVO> array;
    Context context;

    //생성을 할때 array값과 context값을 받아서 생성을 해준다.
    public BlogAdapter(ArrayList<BlogVO> array, Context context) {
        this.array = array;
        this.context = context;
    }

    @NonNull
    @Override
    public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        //view 생성
        View view= LayoutInflater.from(parent.getContext()).inflate(R.layout.item,null);
        return new ViewHolder(view);
    }

    @Override
    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
        final String title=array.get(position).getTitle();
        String link=array.get(position).getTitle();

        //Html.fromHtml:태그를 제거하고 html으로 뽐아내는것
        holder.txttitle.setText(Html.fromHtml("<u>" +array.get(position).getTitle()+"</u>"));
        holder.txtdesc.setText(Html.fromHtml(array.get(position).getDescription()));

        holder.txttitle.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent=new Intent(context,DetailActivity.class);
                //제목을 가져감
                intent.putExtra("title",title);
                context.startActivity(intent);
            }
        });
    }

    @Override
    public int getItemCount() {
        return array.size();
    }

    public class ViewHolder extends RecyclerView.ViewHolder {
        TextView txttitle,txtdesc;
        public ViewHolder(@NonNull View itemView) {
            super(itemView);
            txttitle=itemView.findViewById(R.id.txttitle);
            txtdesc=itemView.findViewById(R.id.txtdesc);
        }
    }
}

activity_detail.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"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.ex16.DetailActivity"
    android:orientation="vertical">
    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/txttitle"
        android:textSize="20sp"
        android:text="여기에 출력합니다."
        android:padding="10sp"
        android:gravity="center"/>
    <WebView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/web"/>
</LinearLayout>