RecyclerView와 Retrofit2를 이용하여 JsonArray 데이터를 수신하여 파싱 한 후에 필요한 데이터 목록을 만들기 위한 예제입니다.
준비
1. build.gradle(Module.app)에 retrofit2 implementation
dependencies {
implementation 'com.squareup.retrofit2:retrofit:2.9.0'
}2. build.gradle(Module.app)에 recyclerview implementation
implementation 'androidx.recyclerview:recyclerview:1.1.0'
3. AndroidManifest에 Internet Permission 추가
<uses-permission android:name="android.permission.INTERNET" />
layout
1. data를 띄우기 위한 RecyclerView
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/recylerView"
android:layout_width="320dp"
android:layout_height="220dp"
android:background="#000000"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintVertical_bias="0.05" >
</androidx.recyclerview.widget.RecyclerView>2. RecyclerView 에 띄울 데이터를 표시할 layout
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:background="#ffffff"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<TextView
android:id="@+id/textview_number"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="100dp"
android:text="num"
android:textColor="#000000" />
<TextView
android:id="@+id/textview_price"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="100dp"
android:text="price"
android:textColor="#000000" />
</LinearLayout>
</LinearLayout>
java
1. data클래스
package com.example.userapplication.mainview.data;
import com.google.gson.annotations.SerializedName;
public class Selldata {
@SerializedName("count")
private int count;
@SerializedName("price")
private int price;
public Selldata(int count,int price)
{
this.count=count;
this.price=price;
}
public int getPrice() {
return price;
}
public int getCount() {
return count;
}
}
2. dataRequest클래스
package com.example.userapplication.mainview.data;
import com.google.gson.annotations.SerializedName;
public class SelldataRequest {
@SerializedName("ownerEmail")
private String ownerEmail;
@SerializedName("startDate")
private String startDate;
@SerializedName("endDate")
private String endDate;
public SelldataRequest() {
}
public SelldataRequest(String ownerEmail, String startDate, String endDate) {
this.ownerEmail=ownerEmail;
this.startDate = startDate;
this.endDate = endDate;
}
}3. dataResponse클래스
package com.example.userapplication.mainview.data;
import com.google.gson.annotations.SerializedName;
import org.json.JSONException;
import java.util.List;
public class SelldataResponse {
@SerializedName("code")
private int code;
@SerializedName("resultArray")
private List<Selldata> result_Array;
public SelldataResponse(List<Selldata> result_array) throws JSONException {
result_Array = result_array;
}
public int getCode() { return code; }
public List getObject() { return result_Array; }
}4. main activity
public class SellStatusActivity extends AppCompatActivity {
Button mConfirm;
private RecyclerView recyclerView;
private RecyclerView.Adapter adapter;
private RecyclerView.LayoutManager layoutManager;
private List<Selldata> list=new ArrayList<>();
private ServiceApi service;
<생략>
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_sellstatus);
service = RetrofitClient.getClient().create(ServiceApi.class);
getData(new SelldataRequest(saved_email,mStartDate,mEndDate));
}
<생략>
private void getData(SelldataRequest data) {
service.ownerSellData(data).enqueue(new Callback<SelldataResponse>() {
@Override
public void onResponse(Call<SelldataResponse> call, Response<SelldataResponse> response) {
SelldataResponse result = response.body();
List<Selldata> list=new ArrayList<>();
if (result.getCode()==200) {
//count(int), price(int)
list.clear();
list = result.getObject();
recyclerView = (RecyclerView)findViewById(R.id.recylerView); //아이디 연결
recyclerView.setHasFixedSize(true); // 리사이클뷰 기존성능 강화
layoutManager = new LinearLayoutManager(getApplicationContext());
recyclerView.setLayoutManager(layoutManager);
adapter = new SellAdapter(list);
recyclerView.setAdapter(adapter); //리사이클러뷰에 어댑터 연결
adapter.notifyDataSetChanged();
//mSellCountView.setText(Integer.toString(adapter.getItemCount()));
//mTotalAmountView.setText(Integer.toString(getItemTotalAmount(list)));
}
}
@Override
public void onFailure(Call<SelldataResponse> call, Throwable t) {
Toast.makeText(SellStatusActivity.this, "에러", Toast.LENGTH_SHORT).show();
Log.e("에러", t.getMessage());
}
});
}
}
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