※다운로드하시면 더 선명한 자료를 보실 수 있습니다. 머릿속으로 그리던 나만의 앱, 생각만 잔뜩 하고 어디서부터 시작할지 고민 중이세요? Android에 대한 가벼운 이해를 곁들여서 간단한 앱을 만들어가는 과정을 통해 (앱 개발이 생소한) 개발자들이 느끼는 Android 앱 개발의 진입장벽을 조금 낮춰보는 시간을 준비했습니다. 목차 1. 기획 2. 화면 개발 3. 서버 연동 4. 데이터 UI 바인딩 5. Play Store 출시 대상 Android 앱을 한번 만들어 보고 싶은 개발자라면 누구나 ■관련 동영상: https://youtu.be/VhBKxRKPaSo

23. <androidx.constraintlayout.widget.ConstraintLayout ...>
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent”>
<LinearLayout
android:id="@+id/delivery_items_linear_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"/>
</ScrollView>
<com.google.android.material.floatingactionbutton.FloatingActionButton ... />
</androidx.constraintlayout.widget.ConstraintLayout>

24. <androidx.constraintlayout.widget.ConstraintLayout ...>
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent”>
<LinearLayout
android:id="@+id/delivery_items_linear_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"/>
</ScrollView>
<com.google.android.material.floatingactionbutton.FloatingActionButton ... />
</androidx.constraintlayout.widget.ConstraintLayout>

25. <androidx.constraintlayout.widget.ConstraintLayout ...>
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent”>
<LinearLayout
android:id="@+id/delivery_items_linear_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"/>
</ScrollView>
<com.google.android.material.floatingactionbutton.FloatingActionButton ... />
</androidx.constraintlayout.widget.ConstraintLayout>

26. <androidx.constraintlayout.widget.ConstraintLayout ...>
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent”>
<LinearLayout
android:id="@+id/delivery_items_linear_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"/>
</ScrollView>
<com.google.android.material.floatingactionbutton.FloatingActionButton ... />
</androidx.constraintlayout.widget.ConstraintLayout>

28. https://material.io/components/buttons-floating-action-button/#specs
package com.vogella.ide.counter.main;
import com.vogella.ide.counter.util.Counter;
public class Tester {
public static void main(String[] args) {
Counter counter = new Counter();
int result = counter.count(5);
if (result == 15) {System.out.println("Correct");
} else { System.out.println("False"); } try { counter.count(256); } catch (RuntimeException e)
{ System.out.println("Works as exepected");
}
}
}

29. https://material.io/resources/icons

30. https://material.io/resources/icons

31. https://material.io/resources/icons

32. <androidx.constraintlayout.widget.ConstraintLayout
... >
...
<com.google.android.material.floatingactionbutton.FloatingActionButton
android:id="@+id/add_delivery_floating_action_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content”
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
android:layout_margin=”16dp"
app:srcCompat="@drawable/baseline_add_white_24" />
</androidx.constraintlayout.widget.ConstraintLayout>

33. package com.vogella.ide.counter.main;
import com.vogella.ide.counter.util.Counter;
public class Tester {
public static void main(String[] args) {
Counter counter = new Counter();
int result = counter.count(5);
if (result == 15) {System.out.println("Correct");
} else { System.out.println("False"); } try { counter.count(256); } catch (RuntimeException e)
{ System.out.println("Works as exepected");
}
}
}

41. private void loadUrl(final String url, final String deliveryId) {
webView.loadUrl(String.format(url, deliveryId));
}
http://www.hanjin.co.kr/delivery_html/inquiry/result_waybill.jsp?wbl_num=506757384372

43. {
"result": "Y",
"senderName": null,
"receiverName": "공성*",
"itemName": "잡화",
...
}

47. dependencies {
...
implementation 'com.squareup.retrofit2:retrofit:2.6.2’
implementation 'com.squareup.retrofit2:converter-gson:2.6.1’
}

48. <manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.mydelivery_nhn_forward_2019">
<uses-permission android:name="android.permission.INTERNET" />
...

49. private void initRetrofit() {
retrofit = new Retrofit.Builder()
.baseUrl(company.getUrl())
.addConverterFactory(GsonConverterFactory.create())
.build();
}

50. private void initApiService() {
service = retrofit.create(ApiInterface.class);
}
public interface ApiInterface {
@GET("api/v1/trackingInfo")
Call<ResponseDelivery> getDelivery(@Query("t_key") String apiKey,
@Query("t_code") String companyCode,
@Query("t_invoice") String deliveryId);
}

51. private void fetchDelivery(final String companyCode, final String deliveryId) {
service.getDelivery(API_KEY, companyCode, deliveryId)
.enqueue(new Callback<ResponseDelivery>() {
@Override
public void onResponse(Call<ResponseDelivery> call, Response<ResponseDelivery> response) {
setData(response.body());
}
@Override
public void onFailure(Call<ResponseDelivery> call, Throwable t) {
// do error handling
}
});
}

54. private void fetchDelivery(final String companyCode, final String deliveryId) {
service.getDelivery(API_KEY, companyCode, deliveryId)
.enqueue(new Callback<ResponseDelivery>() {
@Override
public void onResponse(Call<ResponseDelivery> call, Response<ResponseDelivery> response) {
setData(response.body());
}
@Override
public void onFailure(Call<ResponseDelivery> call, Throwable t) {
// do error handling
}
});
}

58. public class DeliveryItem {
private String subject;
private String company;
private String deliveryId;
}

60. public View getItemView(final Delivery item) {
View itemView = layoutInflater.inflate(R.layout.item_delivery, null, false);
TextView subjectTextView = itemView.findViewById(R.id.subject);
TextView deliveryInfoTextView = itemView.findViewById(R.id.delivery_info);
subjectTextView.setText(item.getSubject());
deliveryInfoTextView.setText(item.getDeliveryCompanyName().getName());
itemView.setOnClickListener(v ->
// do something
});
return itemView;
}
<TextView
android:id="@+id/subject”
android:text=“티셔츠”
…/>
<TextView
android:id="@+id/delivery_info”
android:text=“우*국택배 1234567890”
…/>

61. public View getItemView(final Delivery item) {
View itemView = layoutInflater.inflate(R.layout.item_delivery, null, false);
TextView subjectTextView = itemView.findViewById(R.id.subject);
TextView deliveryInfoTextView = itemView.findViewById(R.id.delivery_info);
subjectTextView.setText(item.getSubject());
deliveryInfoTextView.setText(item.getDeliveryCompanyName().getName());
itemView.setOnClickListener(v ->
// do something
});
return itemView;
}
<TextView
android:id="@+id/subject”
android:text=“티셔츠”
…/>
<TextView
android:id="@+id/delivery_info”
android:text=“우*국택배 1234567890”
…/>

62. public View getItemView(final Delivery item) {
View itemView = layoutInflater.inflate(R.layout.item_delivery, null, false);
TextView subjectTextView = itemView.findViewById(R.id.subject);
TextView deliveryInfoTextView = itemView.findViewById(R.id.delivery_info);
subjectTextView.setText(item.getSubject());
deliveryInfoTextView.setText(item.getDeliveryCompanyName().getName());
itemView.setOnClickListener(v ->
// do something
});
return itemView;
}
<TextView
android:id="@+id/subject”
android:text=“티셔츠”
…/>
<TextView
android:id="@+id/delivery_info”
android:text=“우*국택배 1234567890”
…/>

64. private void setItems(final List<Delivery> items) {
for (Delivery item : items) {
linearLayout.addView(getItemView(item));
}
}

65. <androidx.constraintlayout.widget.ConstraintLayout ...>
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent”>
<LinearLayout
android:id="@+id/delivery_items_linear_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"/>
</ScrollView>
<com.google.android.material.floatingactionbutton.FloatingActionButton ... />
</androidx.constraintlayout.widget.ConstraintLayout>

66. <androidx.constraintlayout.widget.ConstraintLayout ...>
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent”>
<LinearLayout
android:id="@+id/delivery_items_linear_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"/>
</ScrollView>
<com.google.android.material.floatingactionbutton.FloatingActionButton ... />
</androidx.constraintlayout.widget.ConstraintLayout>