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외주/과외 등 문의[Android Studio]서버와 연결을 하기 위한 기본 구성 - retorifit2, Gson, okttp3 준비하기
| Computer/Android 2018. 7. 30. 00:15gradle에 다음을 추가한다.
implementation 'com.squareup.retrofit2:retrofit:2.3.0'
implementation 'com.squareup.retrofit2:converter-gson:2.3.0'
implementation 'com.squareup.okhttp3:logging-interceptor:3.3.1'
implementation 'com.squareup.okhttp3:okhttp:3.8.1'
remote란 패키지 하나를 만들자.
그리고 그 안에 다음을 그냥 붙여 넣는다.
// ServiceGenerator.java
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import org.koreanlab.xxx.BuildConfig;
import okhttp3.OkHttpClient;
import okhttp3.logging.HttpLoggingInterceptor;
import retrofit2.Retrofit;
import retrofit2.converter.gson.GsonConverterFactory;
/**
* Created by Chanj on 11/06/2018.
*/
public class ServiceGenerator {
public static <S> S createService(Class<S> serviceClass){
HttpLoggingInterceptor loggingInterceptor = new HttpLoggingInterceptor();
if(BuildConfig.DEBUG){
loggingInterceptor.setLevel(HttpLoggingInterceptor.Level.BODY);
}else{
loggingInterceptor.setLevel(HttpLoggingInterceptor.Level.NONE);
}
OkHttpClient.Builder httpClient = new OkHttpClient.Builder();
httpClient.addInterceptor(loggingInterceptor);
Gson gson = new GsonBuilder()
.setLenient()
.create();
Retrofit retrofit = new Retrofit.Builder()
.baseUrl(RemoteService.BASE_URL)
.addConverterFactory(GsonConverterFactory.create(gson))
.build();
return retrofit.create(serviceClass);
}
}
위의 소스는 변경할 게 없다.
아래의 소스만 서버와 통신할 때 수정해주면된다.
// RemoteService.java (인터페이스다)
import java.util.ArrayList;
import retrofit2.Call;
import retrofit2.http.Body;
import retrofit2.http.GET;
import retrofit2.http.POST;
/**
* Created by Chanj on 11/06/2018.
*/
public interface RemoteService {
String BASE_URL = "http://aaa.bbb.ccc.ddd:pppp";
@POST("/search/article")
Call<ArrayList<ArticleItem>> selectArticle(@Body SearchItem searchItem);
@POST("/write/article")
Call<Integer> insertArticle(@Body ArticleItem searchItem);
}
어노테이션에 대해서는 따로 검색해보길 바란다.
서버와 통신이 되려면 Activity와 remote가 연결이 되어야 하는데 다음과 같이 처리한다.
private void getList(SearchItem searchItem) {
RemoteService remoteService = ServiceGenerator.createService(RemoteService.class);
Call<ArrayList<ArticleItem>> call = remoteService.selectArticle(searchItem);
call.enqueue(new Callback<ArrayList<ArticleItem>>() {
@Override
public void onResponse(Call<ArrayList<ArticleItem>> call, Response<ArrayList<ArticleItem>> response) {
ArrayList<ArticleItem> resultItems = response.body();
if (response.isSuccessful() && resultItems != null) {
Log.d(TAG, resultItems.toString());
searchListAdapter = new SearchAdapter(getApplicationContext(), resultItems);
listView.setAdapter(searchListAdapter);
}
Log.d(TAG, "Got results from server successfully!!!");
}
@Override
public void onFailure(Call<ArrayList<ArticleItem>> call, Throwable t) {
Log.d(TAG, "Got no results. :(");
Log.d(TAG, t.toString());
}
});
}
여기서 Articleitem은 필자가 직접 만든 객체다. 나머지는 비슷한 형식으로 처리하면 된다.
