[2019.02.09] Retrofit 요약

1.매니페스트에 인터넷 통신을위한 권한 허용

<manifest xmlns:android="http://schemas.android.com/apk/res/android"> <uses-permission android:name="android.permission.INTERNET" /> </manifest>

2. Gradle을 이용하여 Retrofit을 설치

dependencies { implementation 'com.google.code.gson:gson:2.7' implementation 'com.squareup.retrofit2:retrofit:2.1.0' implementation 'com.squareup.retrofit2:converter-gson:2.1.0' }

3. DTO 작성

public class Member { private String id; private String name; public String getId(){ return id; } public String getName(){ return name; } }

4. Service 작성

public interface RetrofitMemberService { @GET("/member/{id}") Call<Member> getMember(@Path("id") String id); @GET("/members") Call<List<Member>> getMembers(); @FormUrlEncoded @POST("/member") Call<Member> postMember(@FieldMap HashMap<String, Object> param); @FormUrlEncoded @POST("/member") Call<Member> postMemberByJson(@Body Member param); @PUT("/member") Call<Member> putMember(@Body Member param); @DELETE("/member") Call<ResponseBody> deleteMember(); }

5. Retrofit 사용

public class MainActivity extends AppCompatActivity { private Retrofit retrofit; private RetrofitMemberService retrofitMemberService; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); buildRetrofit(); createRetrofitService(); callRetrofitGetAPI(); callRetrofitPostAPI(); } private void buildRetrofit(){ retrofit = new Retrofit.Builder() .baseUrl("http://baseUrl.com") .addConverterFactory(GsonConverterFactory.create()) .build(); } private void createRetrofitService(){ retrofitMemberService = retrofit.create(RetrofitMemberService.class); } private void callRetrofitGetAPI(){ RetrofitMemberService.getMember("kok202").enqueue(new Callback<Member>() { @Override public void onResponse(@NonNull Call<Member> call, @NonNull Response<Member> response) { if (!response.isSuccessful()) return; Member member = response.body(); String id = member.getId(); String name = member.getName(); }   @Override public void onFailure(@NonNull Call<Member> call, @NonNull Throwable t) {   } }); } private void callRetrofitGetAPI(){ HashMap<String, Object> input = new HashMap<>(); input.put("id", "Bpone"); input.put("name", "Hong gil dong"); retrofitMemberService.postData(input).enqueue(new Callback<Member>() { @Override public void onResponse(@NonNull Call<Member> call, @NonNull Response<Member> response) { if (!response.isSuccessful()) return; Member member = response.body(); String id = member.getId(); String name = member.getName(); }   @Override public void onFailure(@NonNull Call<Member> call, @NonNull Throwable t) {   } }); } }

더 자세한 내용 : https://kor45cw.tistory.com/5