\uc548\ub4dc\ub85c\uc774\ub4dc \uc571 \uac1c\ubc1c\uc5d0\uc11c \uac1d\uccb4\uc9c0\ud5a5 \ud504\ub85c\uadf8\ub798\ubc0d(OOP)\uc740 \ub9e4\uc6b0 \uc911\uc694\ud55c \uac1c\ub150\uc785\ub2c8\ub2e4. \uc774 \uae00\uc5d0\uc11c\ub294 \uac1d\uccb4\uc9c0\ud5a5 \ud504\ub85c\uadf8\ub798\ubc0d\uc758 \uc6d0\uce59\uacfc \uc790\uc8fc \ubc1c\uc0dd\ud558\ub294 \uc2e4\uc218, \uadf8\ub9ac\uace0 \uc774\ub97c \uc790\ubc14 \ucf54\ub4dc\ub97c \ud1b5\ud574 \uc5b4\ub5bb\uac8c \ud574\uacb0\ud560 \uc218 \uc788\ub294\uc9c0\ub97c \uc2ec\ub3c4 \uae4a\uac8c \ub2e4\ub8f0 \uac83\uc785\ub2c8\ub2e4. \uc774 \uac15\uc88c\ub294 \uc548\ub4dc\ub85c\uc774\ub4dc \uac1c\ubc1c\uc5d0 \uc218\uc6d4\ud558\uac8c \uc811\uadfc\ud560 \uc218 \uc788\ub3c4\ub85d \ub3c4\uc640\uc8fc\ub294 \uc720\uc6a9\ud55c \uc815\ubcf4\ub97c \uc81c\uacf5\ud569\ub2c8\ub2e4. \uac01 \uc139\uc158\uc5d0\uc11c \uc608\uc81c \ucf54\ub4dc\uac00 \ud3ec\ud568\ub418\uc5b4 \uc788\uc5b4 \ubcf4\ub2e4 \uc27d\uac8c \uc774\ud574\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n
1. \uac1d\uccb4\uc9c0\ud5a5 \ud504\ub85c\uadf8\ub798\ubc0d(OOP)\ub780 \ubb34\uc5c7\uc778\uac00?<\/h2>\n
\uac1d\uccb4\uc9c0\ud5a5 \ud504\ub85c\uadf8\ub798\ubc0d\uc740 \uc18c\ud504\ud2b8\uc6e8\uc5b4 \uac1c\ubc1c\uc758 \ud328\ub7ec\ub2e4\uc784 \uc911 \ud558\ub098\ub85c, \ud504\ub85c\uadf8\ub7a8\uc744 \uac1d\uccb4\ub77c\ub294 \ub3c5\ub9bd\uc801\uc778 \ub2e8\uc704\ub85c \uad6c\uc131\ud558\uc5ec \ucf54\ub4dc\ub97c \ubaa8\ub4c8\ud654\ud558\uace0 \uc7ac\uc0ac\uc6a9\uc131\uc744 \ub192\uc774\ub294 \ubc29\uc2dd\uc785\ub2c8\ub2e4. \uc790\ubc14\ub294 \uac1d\uccb4\uc9c0\ud5a5 \uc5b8\uc5b4\ub85c, OOP\uc758 \uae30\ubcf8 \uc6d0\uce59\uc778 \ucea1\uc290\ud654, \uc0c1\uc18d, \ub2e4\ud615\uc131\uc744 \uc9c0\uc6d0\ud569\ub2c8\ub2e4.<\/p>\n
1.1 OOP\uc758 \uae30\ubcf8 \uc6d0\uce59<\/h3>\n\n- \ucea1\uc290\ud654(Encapsulation):<\/strong> \uac1d\uccb4\uc758 \uc18d\uc131\uacfc \uba54\uc18c\ub4dc\ub97c \ud558\ub098\uc758 \ub2e8\uc704\ub85c \ubb36\uc5b4 \uc678\ubd80\uc5d0\uc11c \uc811\uadfc\ud560 \uc218 \uc5c6\ub3c4\ub85d \ubcf4\ud638\ud558\ub294 \uac83\uc785\ub2c8\ub2e4. \uc774\ub97c \ud1b5\ud574 \ub370\uc774\ud130\uc758 \ubb34\uacb0\uc131\uc744 \uc720\uc9c0\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/li>\n
- \uc0c1\uc18d(Inheritance):<\/strong> \uc774\ubbf8 \uc815\uc758\ub41c \ud074\ub798\uc2a4\ub97c \uae30\ubc18\uc73c\ub85c \uc0c8\ub85c\uc6b4 \ud074\ub798\uc2a4\ub97c \uc815\uc758\ud558\ub294 \ubc29\ubc95\uc785\ub2c8\ub2e4. \ucf54\ub4dc\uc758 \uc7ac\uc0ac\uc6a9\uc131\uc744 \ub192\uc774\uace0, \uae30\ub2a5\uc744 \ud655\uc7a5\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/li>\n
- \ub2e4\ud615\uc131(Polymorphism):<\/strong> \ub3d9\uc77c\ud55c \uba54\uc18c\ub4dc \uc774\ub984\uc774 \ub2e4\uc591\ud55c \ud615\ud0dc\ub85c \ub3d9\uc791\ud560 \uc218 \uc788\ub294 \ub2a5\ub825\uc785\ub2c8\ub2e4. \uc774\ub294 \ud504\ub85c\uadf8\ub7a8\uc758 \uc720\uc5f0\uc131\uc744 \ub192\uc5ec\uc90d\ub2c8\ub2e4.<\/li>\n<\/ul>\n
2. \ud2c0\ub9b0 \uac1d\uccb4\uc9c0\ud5a5 \ud504\ub85c\uadf8\ub798\ubc0d\uc758 \uc704\ud5d8\uc131<\/h2>\n
OOP\uc758 \uae30\ubcf8 \uc6d0\uce59\uc744 \uc798 \uc9c0\ud0a4\uc9c0 \uc54a\uc73c\uba74 \ucf54\ub4dc\uc758 \uac00\ub3c5\uc131\uc774 \ub5a8\uc5b4\uc9c0\uace0, \uc720\uc9c0\ubcf4\uc218\uac00 \uc5b4\ub824\uc6cc\uc9d1\ub2c8\ub2e4. \ub2e4\uc74c\uc740 OOP\uc5d0\uc11c \uc790\uc8fc \ubc1c\uc0dd\ud558\ub294 \uc2e4\uc218\ub4e4\uc785\ub2c8\ub2e4:<\/p>\n
2.1 \ubd88\ud544\uc694\ud55c \uc815\ubcf4 \ub178\ucd9c<\/h3>\n
\ubcc0\uc218\ub098 \uba54\uc18c\ub4dc\uac00 \uacf5\uc6a9(public)\uc73c\ub85c \uc124\uc815\ub418\uc5b4 \uc678\ubd80\uc5d0\uc11c \uc790\uc720\ub86d\uac8c \uc811\uadfc\ud560 \uc218 \uc788\ub294 \uacbd\uc6b0, \uac1d\uccb4\uc758 \uc0c1\ud0dc\uac00 \ubd88\uc548\uc815\ud574\uc9c8 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774\ub7ec\ud55c \ubb38\uc81c\ub97c \ud53c\ud558\uae30 \uc704\ud574\uc11c\ub294 \ubcc0\uc218\uc5d0 \uc811\uadfc\ud558\ub294 \uba54\uc18c\ub4dc\ub97c \uc124\uc815\ud558\uace0, \uc9c1\uc811\uc801\uc73c\ub85c \uc811\uadfc\ud558\uc9c0 \ubabb\ud558\ub3c4\ub85d \ud574\uc57c \ud569\ub2c8\ub2e4.<\/p>\n
\uc608\uc81c \ucf54\ub4dc:<\/h4>\npublic class User {\n private String name;\n private int age;\n\n public String getName() {\n return name;\n }\n\n public void setName(String name) {\n this.name = name;\n }\n \n public int getAge() {\n return age;\n }\n\n public void setAge(int age) {\n if (age > 0) {\n this.age = age;\n }\n }\n}<\/code><\/pre>\n2.2 \ube44\ud6a8\uc728\uc801\uc778 \uc0c1\uc18d \uc0ac\uc6a9<\/h3>\n
\uc0c1\uc18d\uc744 \ub0a8\uc6a9\ud558\uba74 \ucf54\ub4dc\uac00 \ubcf5\uc7a1\ud574\uc9c0\uace0, \ucd94\uc801\ud558\uae30 \uc5b4\ub824\uc6b4 \ubc84\uadf8\uac00 \ubc1c\uc0dd\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ud544\uc694\ud55c \uacbd\uc6b0\uc5d0\ub9cc \ud074\ub798\uc2a4\ub97c \uc0c1\uc18d\ud558\uace0, \uac00\ub2a5\ud55c \ud55c ‘\uad6c\uc131(Composition)’\uc744 \uc0ac\uc6a9\ud558\ub294 \uac83\uc774 \uc88b\uc2b5\ub2c8\ub2e4.<\/p>\n
\uc608\uc81c \ucf54\ub4dc:<\/h4>\npublic class Car {\n private Engine engine;\n\n public Car(Engine engine) {\n this.engine = engine;\n }\n\n public void start() {\n engine.start();\n }\n}\n\npublic class Engine {\n public void start() {\n System.out.println(\"Engine started\");\n }\n}<\/code><\/pre>\n2.3 \ub2e4\ud615\uc131\uc758 \uc624\uc6a9<\/h3>\n
\ub2e4\ud615\uc131\uc744 \uc0ac\uc6a9\ud560 \ub54c\ub294 \uba54\uc18c\ub4dc \uc624\ubc84\ub85c\ub529\uacfc \uc624\ubc84\ub77c\uc774\ub529\uc758 \ucc28\uc774\ub97c \uc774\ud574\ud574\uc57c \ud569\ub2c8\ub2e4. \ub610\ud55c, \ub2e4\ud615\uc131 \uc0ac\uc6a9\uc758 \ubc94\uc704\ub97c \uba85\ud655\ud788 \ud574\uc57c \ud558\uba70, \uc790\uce6b \uc798\ubabb\ud558\ub2e4\uac04 \ucf54\ub4dc\uc758 \ud750\ub984\uc774 \ubcf5\uc7a1\ud574\uc9c8 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n
\uc608\uc81c \ucf54\ub4dc:<\/h4>\nclass Animal {\n void sound() {\n System.out.println(\"Animal sound\");\n }\n}\n\nclass Dog extends Animal {\n void sound() {\n System.out.println(\"Bark\");\n }\n}\n\nclass Cat extends Animal {\n void sound() {\n System.out.println(\"Meow\");\n }\n}\n\npublic class Main {\n public static void main(String[] args) {\n Animal myDog = new Dog();\n Animal myCat = new Cat();\n\n myDog.sound();\n myCat.sound();\n }\n}<\/code><\/pre>\n3. \uac1d\uccb4\uc9c0\ud5a5 \uc124\uacc4 \uc6d0\uce59(SOLID)<\/h2>\n
SOLID \uc6d0\uce59\uc740 \uac1d\uccb4\uc9c0\ud5a5 \uc124\uacc4\ub97c \ub354 \uc798 \ud558\uae30 \uc704\ud55c \ub2e4\uc12f \uac00\uc9c0 \uc6d0\uce59\uc744 \uc815\ub9ac\ud55c \uac83\uc785\ub2c8\ub2e4. \uc774 \uc6d0\uce59\uc744 \uae30\uc5b5\ud558\uace0 \ud65c\uc6a9\ud558\uba74 \ub354 \ub098\uc740 \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc744 \uc124\uacc4\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n
3.1 \ub2e8\uc77c \ucc45\uc784 \uc6d0\uce59(SRP)<\/h3>\n
\ud55c \ud074\ub798\uc2a4\ub294 \uc624\uc9c1 \ud558\ub098\uc758 \ucc45\uc784\ub9cc \uac00\uc838\uc57c \ud558\uba70, \uadf8 \ucc45\uc784\uc774 \uc644\uc804\ud788 \ucea1\uc290\ud654\ub418\uc5b4\uc57c \ud569\ub2c8\ub2e4. \uc774\ub97c \ud1b5\ud574 \ud074\ub798\uc2a4\uc758 \uc7ac\uc0ac\uc6a9\uc131\uc744 \ub192\uc774\uace0, \ubcc0\uacbd\uc774 \uc6a9\uc774\ud558\uac8c \ud569\ub2c8\ub2e4.<\/p>\n
3.2 \uac1c\ubc29-\ud3d0\uc1c4 \uc6d0\uce59(OCP)<\/h3>\n
\uc18c\ud504\ud2b8\uc6e8\uc5b4 \uc694\uc18c\ub294 \ud655\uc7a5\uc5d0\ub294 \uc5f4\ub824 \uc788\uc5b4\uc57c \ud558\uace0, \uc218\uc815\uc5d0\ub294 \ub2eb\ud600 \uc788\uc5b4\uc57c \ud569\ub2c8\ub2e4. \uc774\ub97c \ud1b5\ud574 \uae30\uc874 \ucf54\ub4dc\ub97c \ubcc0\uacbd\ud558\uc9c0 \uc54a\uace0\ub3c4 \uc0c8\ub85c\uc6b4 \uae30\ub2a5\uc744 \ucd94\uac00\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n
3.3 \ub9ac\uc2a4\ucf54\ud504 \uce58\ud658 \uc6d0\uce59(LSP)<\/h3>\n
\ubd80\ubaa8 \ud074\ub798\uc2a4\uc758 \uac1d\uccb4\uac00 \uc790\uc2dd \ud074\ub798\uc2a4\uc758 \uac1d\uccb4\ub85c \ub300\uccb4\ub420 \uc218 \uc788\uc5b4\uc57c \ud569\ub2c8\ub2e4. \uc774\ub97c \ud1b5\ud574 \uc2dc\uc2a4\ud15c\uc758 \uc548\uc815\uc131\uc744 \uc720\uc9c0\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n
3.4 \uc778\ud130\ud398\uc774\uc2a4 \ubd84\ub9ac \uc6d0\uce59(ISP)<\/h3>\n
\ud074\ub77c\uc774\uc5b8\ud2b8\ub294 \uc790\uc2e0\uc774 \uc0ac\uc6a9\ud558\uc9c0 \uc54a\ub294 \uba54\uc18c\ub4dc\uc5d0 \uc758\uc874\ud558\uc9c0 \uc54a\uc544\uc57c \ud569\ub2c8\ub2e4. \uc774\ub294 \ubd88\ud544\uc694\ud55c \uae30\ub2a5\uc744 \uac15\uc81c\ub85c \uad6c\ud604\ud558\ub294 \uac83\uc744 \ubc29\uc9c0\ud569\ub2c8\ub2e4.<\/p>\n
3.5 \uc758\uc874\uc131 \uc5ed\uc804 \uc6d0\uce59(DIP)<\/h3>\n
\uace0\uc218\uc900 \ubaa8\ub4c8\uc740 \uc800\uc218\uc900 \ubaa8\ub4c8\uc5d0 \uc758\uc874\ud558\uba74 \uc548 \ub418\uba70, \ub450 \ubaa8\ub4c8 \ubaa8\ub450 \ucd94\uc0c1\ud654\uc5d0 \uc758\uc874\ud574\uc57c \ud569\ub2c8\ub2e4. \uc774\ub97c \ud1b5\ud574 \ubaa8\ub4c8 \uac04\uc758 \uacb0\ud569\ub3c4\ub97c \ub0ae\ucd9c \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n
4. \uc548\ub4dc\ub85c\uc774\ub4dc \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc5d0\uc11c OOP \uc801\uc6a9\ud558\uae30<\/h2>\n
\uc774\uc81c \uc548\ub4dc\ub85c\uc774\ub4dc \uc560\ud50c\ub9ac\ucf00\uc774\uc158 \uac1c\ubc1c\uc5d0\uc11c OOP \uc6d0\uce59\uc744 \uc5b4\ub5bb\uac8c \uc801\uc6a9\ud560 \uc218 \uc788\ub294\uc9c0 \uc0b4\ud3b4\ubcf4\uaca0\uc2b5\ub2c8\ub2e4. Android Studio IDE\ub97c \uc0ac\uc6a9\ud558\uc5ec \uac04\ub2e8\ud55c \uc608\uc81c\ub97c \ub9cc\ub4e4\uc5b4 \ubcf4\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n
4.1 \ud504\ub85c\uc81d\ud2b8 \uad6c\uc131<\/h3>\n
\uc548\ub4dc\ub85c\uc774\ub4dc \uc2a4\ud29c\ub514\uc624\uc5d0\uc11c \uc0c8 \ud504\ub85c\uc81d\ud2b8\ub97c \uc0dd\uc131\ud558\uace0, \uae30\ubcf8 \ud15c\ud50c\ub9bf\uc744 \uc120\ud0dd\ud569\ub2c8\ub2e4. \uc774\ud6c4 \ub2e4\uc74c\uacfc \uac19\uc774 \ud328\ud0a4\uc9c0 \uad6c\uc870\ub97c \uc124\uc815\ud569\ub2c8\ub2e4:<\/p>\n
\n- com.example.myapp<\/li>\n
- model<\/li>\n
- view<\/li>\n
- controller<\/li>\n<\/ul>\n
4.2 Model \uc815\uc758\ud558\uae30<\/h3>\n
\uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc758 \ub370\uc774\ud130\ub97c \ud45c\ud604\ud558\ub294 \ubaa8\ub378 \ud074\ub798\uc2a4\ub97c \uc0dd\uc131\ud569\ub2c8\ub2e4. \uc608\ub97c \ub4e4\uc5b4, \uc0ac\uc6a9\uc790(User) \ubaa8\ub378\uc744 \uc815\uc758\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n
\uc608\uc81c \ucf54\ub4dc:<\/h4>\npackage model;\n\npublic class User {\n private String name;\n\n public User(String name) {\n this.name = name;\n }\n\n public String getName() {\n return name;\n }\n}<\/code><\/pre>\n4.3 View \uc815\uc758\ud558\uae30<\/h3>\n
\uc0ac\uc6a9\uc790 \uc778\ud130\ud398\uc774\uc2a4(UI)\ub97c \uad6c\uc131\ud558\ub294 \ubdf0 \ud074\ub798\uc2a4\ub97c \uc0dd\uc131\ud569\ub2c8\ub2e4. Android\uc758 XML \ub808\uc774\uc544\uc6c3\uc744 \ud65c\uc6a9\ud558\uc5ec UI\ub97c \uc815\uc758\ud569\ub2c8\ub2e4.<\/p>\n
activity_main.xml \uc608\uc81c:<\/h4>\n<LinearLayout xmlns:android=\"http:\/\/schemas.android.com\/apk\/res\/android\"\n android:layout_width=\"match_parent\"\n android:layout_height=\"match_parent\"\n android:orientation=\"vertical\">\n\n <TextView\n android:id=\"@+id\/textView\"\n android:layout_width=\"wrap_content\"\n android:layout_height=\"wrap_content\"\n android:text=\"Welcome\" \/>\n\n <Button\n android:id=\"@+id\/button\"\n android:layout_width=\"wrap_content\"\n android:layout_height=\"wrap_content\"\n android:text=\"Click Me\" \/>\n<\/LinearLayout><\/code><\/pre>\n4.4 Controller \uc815\uc758\ud558\uae30<\/h3>\n
UI\uc640 \ubaa8\ub378 \uac04\uc758 \uc0c1\ud638\uc791\uc6a9\uc744 \uad00\ub9ac\ud558\ub294 \ucee8\ud2b8\ub864\ub7ec \ud074\ub798\uc2a4\ub97c \uc815\uc758\ud569\ub2c8\ub2e4. MainActivity.java \ud30c\uc77c\uc5d0\uc11c \uc774 \uae30\ub2a5\uc744 \uad6c\ud604\ud569\ub2c8\ub2e4.<\/p>\n
\uc608\uc81c \ucf54\ub4dc:<\/h4>\npackage controller;\n\nimport android.os.Bundle;\nimport android.view.View;\nimport android.widget.Button;\nimport android.widget.TextView;\nimport androidx.appcompat.app.AppCompatActivity;\nimport model.User;\n\npublic class MainActivity extends AppCompatActivity {\n private TextView textView;\n private Button button;\n private User user;\n\n @Override\n protected void onCreate(Bundle savedInstanceState) {\n super.onCreate(savedInstanceState);\n setContentView(R.layout.activity_main);\n\n textView = findViewById(R.id.textView);\n button = findViewById(R.id.button);\n user = new User(\"John Doe\");\n\n button.setOnClickListener(new View.OnClickListener() {\n @Override\n public void onClick(View v) {\n textView.setText(\"Hello, \" + user.getName());\n }\n });\n }\n}<\/code><\/pre>\n5. \uacb0\ub860<\/h2>\n
\uac1d\uccb4\uc9c0\ud5a5 \ud504\ub85c\uadf8\ub798\ubc0d\uc740 \uac15\ub825\ud55c \ud328\ub7ec\ub2e4\uc784\uc73c\ub85c \uc548\ub4dc\ub85c\uc774\ub4dc \uc560\ud50c\ub9ac\ucf00\uc774\uc158 \uac1c\ubc1c\uc5d0 \ud544\uc218\uc801\uc785\ub2c8\ub2e4. \uc798\ubabb\ub41c OOP \uc6d0\uce59\uc758 \uc801\uc6a9\uc740 \ucf54\ub4dc\uc758 \uac00\ub3c5\uc131\uacfc \uc720\uc9c0 \ubcf4\uc218\uc131\uc744 \uc800\ud558\uc2dc\ud0a4\uc9c0\ub9cc, OOP \uc6d0\uce59\uc744 \uc62c\ubc14\ub974\uac8c \uc774\ud574\ud558\uace0 \uc801\uc6a9\ud55c\ub2e4\uba74 \ud6a8\uc728\uc801\uc774\uace0 \uc548\uc815\uc801\uc778 \uc571\uc744 \uac1c\ubc1c\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774 \uac15\uc88c\uc5d0\uc11c\ub294 OOP\uc758 \uae30\ubcf8 \uac1c\ub150\uacfc \uc790\uc8fc \ubc1c\uc0dd\ud558\ub294 \uc2e4\uc218\ub97c \ub2e4\ub8e8\uc5c8\uc73c\uba70, \uc2e4\uc6a9\uc801\uc778 \uc608\uc81c\ub97c \ud1b5\ud574 OOP\uc758 \uc801\uc6a9 \ubc29\ubc95\uc5d0 \ub300\ud574 \uc54c\uc544\ubcf4\uc558\uc2b5\ub2c8\ub2e4. \uc774\uc81c \uc5ec\ub7ec\ubd84\uc740 \uc790\ubc14\uc640 \uac1d\uccb4\uc9c0\ud5a5 \ud504\ub85c\uadf8\ub798\ubc0d\uc758 \uc6d0\ub9ac\ub97c \ud1b5\ud574 \ub354 \ub098\uc740 \uc548\ub4dc\ub85c\uc774\ub4dc \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc744 \uac1c\ubc1c\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<\/article>\n
<\/body><\/p>\n","protected":false},"excerpt":{"rendered":"
2. \ud2c0\ub9b0 \uac1d\uccb4\uc9c0\ud5a5 \ud504\ub85c\uadf8\ub798\ubc0d\uc758 \uc704\ud5d8\uc131<\/h2>\n
OOP\uc758 \uae30\ubcf8 \uc6d0\uce59\uc744 \uc798 \uc9c0\ud0a4\uc9c0 \uc54a\uc73c\uba74 \ucf54\ub4dc\uc758 \uac00\ub3c5\uc131\uc774 \ub5a8\uc5b4\uc9c0\uace0, \uc720\uc9c0\ubcf4\uc218\uac00 \uc5b4\ub824\uc6cc\uc9d1\ub2c8\ub2e4. \ub2e4\uc74c\uc740 OOP\uc5d0\uc11c \uc790\uc8fc \ubc1c\uc0dd\ud558\ub294 \uc2e4\uc218\ub4e4\uc785\ub2c8\ub2e4:<\/p>\n
2.1 \ubd88\ud544\uc694\ud55c \uc815\ubcf4 \ub178\ucd9c<\/h3>\n
\ubcc0\uc218\ub098 \uba54\uc18c\ub4dc\uac00 \uacf5\uc6a9(public)\uc73c\ub85c \uc124\uc815\ub418\uc5b4 \uc678\ubd80\uc5d0\uc11c \uc790\uc720\ub86d\uac8c \uc811\uadfc\ud560 \uc218 \uc788\ub294 \uacbd\uc6b0, \uac1d\uccb4\uc758 \uc0c1\ud0dc\uac00 \ubd88\uc548\uc815\ud574\uc9c8 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774\ub7ec\ud55c \ubb38\uc81c\ub97c \ud53c\ud558\uae30 \uc704\ud574\uc11c\ub294 \ubcc0\uc218\uc5d0 \uc811\uadfc\ud558\ub294 \uba54\uc18c\ub4dc\ub97c \uc124\uc815\ud558\uace0, \uc9c1\uc811\uc801\uc73c\ub85c \uc811\uadfc\ud558\uc9c0 \ubabb\ud558\ub3c4\ub85d \ud574\uc57c \ud569\ub2c8\ub2e4.<\/p>\n
\uc608\uc81c \ucf54\ub4dc:<\/h4>\npublic class User {\n private String name;\n private int age;\n\n public String getName() {\n return name;\n }\n\n public void setName(String name) {\n this.name = name;\n }\n \n public int getAge() {\n return age;\n }\n\n public void setAge(int age) {\n if (age > 0) {\n this.age = age;\n }\n }\n}<\/code><\/pre>\n2.2 \ube44\ud6a8\uc728\uc801\uc778 \uc0c1\uc18d \uc0ac\uc6a9<\/h3>\n
\uc0c1\uc18d\uc744 \ub0a8\uc6a9\ud558\uba74 \ucf54\ub4dc\uac00 \ubcf5\uc7a1\ud574\uc9c0\uace0, \ucd94\uc801\ud558\uae30 \uc5b4\ub824\uc6b4 \ubc84\uadf8\uac00 \ubc1c\uc0dd\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ud544\uc694\ud55c \uacbd\uc6b0\uc5d0\ub9cc \ud074\ub798\uc2a4\ub97c \uc0c1\uc18d\ud558\uace0, \uac00\ub2a5\ud55c \ud55c ‘\uad6c\uc131(Composition)’\uc744 \uc0ac\uc6a9\ud558\ub294 \uac83\uc774 \uc88b\uc2b5\ub2c8\ub2e4.<\/p>\n
\uc608\uc81c \ucf54\ub4dc:<\/h4>\npublic class Car {\n private Engine engine;\n\n public Car(Engine engine) {\n this.engine = engine;\n }\n\n public void start() {\n engine.start();\n }\n}\n\npublic class Engine {\n public void start() {\n System.out.println(\"Engine started\");\n }\n}<\/code><\/pre>\n2.3 \ub2e4\ud615\uc131\uc758 \uc624\uc6a9<\/h3>\n
\ub2e4\ud615\uc131\uc744 \uc0ac\uc6a9\ud560 \ub54c\ub294 \uba54\uc18c\ub4dc \uc624\ubc84\ub85c\ub529\uacfc \uc624\ubc84\ub77c\uc774\ub529\uc758 \ucc28\uc774\ub97c \uc774\ud574\ud574\uc57c \ud569\ub2c8\ub2e4. \ub610\ud55c, \ub2e4\ud615\uc131 \uc0ac\uc6a9\uc758 \ubc94\uc704\ub97c \uba85\ud655\ud788 \ud574\uc57c \ud558\uba70, \uc790\uce6b \uc798\ubabb\ud558\ub2e4\uac04 \ucf54\ub4dc\uc758 \ud750\ub984\uc774 \ubcf5\uc7a1\ud574\uc9c8 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n
\uc608\uc81c \ucf54\ub4dc:<\/h4>\nclass Animal {\n void sound() {\n System.out.println(\"Animal sound\");\n }\n}\n\nclass Dog extends Animal {\n void sound() {\n System.out.println(\"Bark\");\n }\n}\n\nclass Cat extends Animal {\n void sound() {\n System.out.println(\"Meow\");\n }\n}\n\npublic class Main {\n public static void main(String[] args) {\n Animal myDog = new Dog();\n Animal myCat = new Cat();\n\n myDog.sound();\n myCat.sound();\n }\n}<\/code><\/pre>\n3. \uac1d\uccb4\uc9c0\ud5a5 \uc124\uacc4 \uc6d0\uce59(SOLID)<\/h2>\n
SOLID \uc6d0\uce59\uc740 \uac1d\uccb4\uc9c0\ud5a5 \uc124\uacc4\ub97c \ub354 \uc798 \ud558\uae30 \uc704\ud55c \ub2e4\uc12f \uac00\uc9c0 \uc6d0\uce59\uc744 \uc815\ub9ac\ud55c \uac83\uc785\ub2c8\ub2e4. \uc774 \uc6d0\uce59\uc744 \uae30\uc5b5\ud558\uace0 \ud65c\uc6a9\ud558\uba74 \ub354 \ub098\uc740 \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc744 \uc124\uacc4\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n
3.1 \ub2e8\uc77c \ucc45\uc784 \uc6d0\uce59(SRP)<\/h3>\n
\ud55c \ud074\ub798\uc2a4\ub294 \uc624\uc9c1 \ud558\ub098\uc758 \ucc45\uc784\ub9cc \uac00\uc838\uc57c \ud558\uba70, \uadf8 \ucc45\uc784\uc774 \uc644\uc804\ud788 \ucea1\uc290\ud654\ub418\uc5b4\uc57c \ud569\ub2c8\ub2e4. \uc774\ub97c \ud1b5\ud574 \ud074\ub798\uc2a4\uc758 \uc7ac\uc0ac\uc6a9\uc131\uc744 \ub192\uc774\uace0, \ubcc0\uacbd\uc774 \uc6a9\uc774\ud558\uac8c \ud569\ub2c8\ub2e4.<\/p>\n
3.2 \uac1c\ubc29-\ud3d0\uc1c4 \uc6d0\uce59(OCP)<\/h3>\n
\uc18c\ud504\ud2b8\uc6e8\uc5b4 \uc694\uc18c\ub294 \ud655\uc7a5\uc5d0\ub294 \uc5f4\ub824 \uc788\uc5b4\uc57c \ud558\uace0, \uc218\uc815\uc5d0\ub294 \ub2eb\ud600 \uc788\uc5b4\uc57c \ud569\ub2c8\ub2e4. \uc774\ub97c \ud1b5\ud574 \uae30\uc874 \ucf54\ub4dc\ub97c \ubcc0\uacbd\ud558\uc9c0 \uc54a\uace0\ub3c4 \uc0c8\ub85c\uc6b4 \uae30\ub2a5\uc744 \ucd94\uac00\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n
3.3 \ub9ac\uc2a4\ucf54\ud504 \uce58\ud658 \uc6d0\uce59(LSP)<\/h3>\n
\ubd80\ubaa8 \ud074\ub798\uc2a4\uc758 \uac1d\uccb4\uac00 \uc790\uc2dd \ud074\ub798\uc2a4\uc758 \uac1d\uccb4\ub85c \ub300\uccb4\ub420 \uc218 \uc788\uc5b4\uc57c \ud569\ub2c8\ub2e4. \uc774\ub97c \ud1b5\ud574 \uc2dc\uc2a4\ud15c\uc758 \uc548\uc815\uc131\uc744 \uc720\uc9c0\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n
3.4 \uc778\ud130\ud398\uc774\uc2a4 \ubd84\ub9ac \uc6d0\uce59(ISP)<\/h3>\n
\ud074\ub77c\uc774\uc5b8\ud2b8\ub294 \uc790\uc2e0\uc774 \uc0ac\uc6a9\ud558\uc9c0 \uc54a\ub294 \uba54\uc18c\ub4dc\uc5d0 \uc758\uc874\ud558\uc9c0 \uc54a\uc544\uc57c \ud569\ub2c8\ub2e4. \uc774\ub294 \ubd88\ud544\uc694\ud55c \uae30\ub2a5\uc744 \uac15\uc81c\ub85c \uad6c\ud604\ud558\ub294 \uac83\uc744 \ubc29\uc9c0\ud569\ub2c8\ub2e4.<\/p>\n
3.5 \uc758\uc874\uc131 \uc5ed\uc804 \uc6d0\uce59(DIP)<\/h3>\n
\uace0\uc218\uc900 \ubaa8\ub4c8\uc740 \uc800\uc218\uc900 \ubaa8\ub4c8\uc5d0 \uc758\uc874\ud558\uba74 \uc548 \ub418\uba70, \ub450 \ubaa8\ub4c8 \ubaa8\ub450 \ucd94\uc0c1\ud654\uc5d0 \uc758\uc874\ud574\uc57c \ud569\ub2c8\ub2e4. \uc774\ub97c \ud1b5\ud574 \ubaa8\ub4c8 \uac04\uc758 \uacb0\ud569\ub3c4\ub97c \ub0ae\ucd9c \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n
4. \uc548\ub4dc\ub85c\uc774\ub4dc \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc5d0\uc11c OOP \uc801\uc6a9\ud558\uae30<\/h2>\n
\uc774\uc81c \uc548\ub4dc\ub85c\uc774\ub4dc \uc560\ud50c\ub9ac\ucf00\uc774\uc158 \uac1c\ubc1c\uc5d0\uc11c OOP \uc6d0\uce59\uc744 \uc5b4\ub5bb\uac8c \uc801\uc6a9\ud560 \uc218 \uc788\ub294\uc9c0 \uc0b4\ud3b4\ubcf4\uaca0\uc2b5\ub2c8\ub2e4. Android Studio IDE\ub97c \uc0ac\uc6a9\ud558\uc5ec \uac04\ub2e8\ud55c \uc608\uc81c\ub97c \ub9cc\ub4e4\uc5b4 \ubcf4\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n
4.1 \ud504\ub85c\uc81d\ud2b8 \uad6c\uc131<\/h3>\n
\uc548\ub4dc\ub85c\uc774\ub4dc \uc2a4\ud29c\ub514\uc624\uc5d0\uc11c \uc0c8 \ud504\ub85c\uc81d\ud2b8\ub97c \uc0dd\uc131\ud558\uace0, \uae30\ubcf8 \ud15c\ud50c\ub9bf\uc744 \uc120\ud0dd\ud569\ub2c8\ub2e4. \uc774\ud6c4 \ub2e4\uc74c\uacfc \uac19\uc774 \ud328\ud0a4\uc9c0 \uad6c\uc870\ub97c \uc124\uc815\ud569\ub2c8\ub2e4:<\/p>\n
\n- com.example.myapp<\/li>\n
- model<\/li>\n
- view<\/li>\n
- controller<\/li>\n<\/ul>\n
4.2 Model \uc815\uc758\ud558\uae30<\/h3>\n
\uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc758 \ub370\uc774\ud130\ub97c \ud45c\ud604\ud558\ub294 \ubaa8\ub378 \ud074\ub798\uc2a4\ub97c \uc0dd\uc131\ud569\ub2c8\ub2e4. \uc608\ub97c \ub4e4\uc5b4, \uc0ac\uc6a9\uc790(User) \ubaa8\ub378\uc744 \uc815\uc758\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n
\uc608\uc81c \ucf54\ub4dc:<\/h4>\npackage model;\n\npublic class User {\n private String name;\n\n public User(String name) {\n this.name = name;\n }\n\n public String getName() {\n return name;\n }\n}<\/code><\/pre>\n4.3 View \uc815\uc758\ud558\uae30<\/h3>\n
\uc0ac\uc6a9\uc790 \uc778\ud130\ud398\uc774\uc2a4(UI)\ub97c \uad6c\uc131\ud558\ub294 \ubdf0 \ud074\ub798\uc2a4\ub97c \uc0dd\uc131\ud569\ub2c8\ub2e4. Android\uc758 XML \ub808\uc774\uc544\uc6c3\uc744 \ud65c\uc6a9\ud558\uc5ec UI\ub97c \uc815\uc758\ud569\ub2c8\ub2e4.<\/p>\n
activity_main.xml \uc608\uc81c:<\/h4>\n<LinearLayout xmlns:android=\"http:\/\/schemas.android.com\/apk\/res\/android\"\n android:layout_width=\"match_parent\"\n android:layout_height=\"match_parent\"\n android:orientation=\"vertical\">\n\n <TextView\n android:id=\"@+id\/textView\"\n android:layout_width=\"wrap_content\"\n android:layout_height=\"wrap_content\"\n android:text=\"Welcome\" \/>\n\n <Button\n android:id=\"@+id\/button\"\n android:layout_width=\"wrap_content\"\n android:layout_height=\"wrap_content\"\n android:text=\"Click Me\" \/>\n<\/LinearLayout><\/code><\/pre>\n4.4 Controller \uc815\uc758\ud558\uae30<\/h3>\n
UI\uc640 \ubaa8\ub378 \uac04\uc758 \uc0c1\ud638\uc791\uc6a9\uc744 \uad00\ub9ac\ud558\ub294 \ucee8\ud2b8\ub864\ub7ec \ud074\ub798\uc2a4\ub97c \uc815\uc758\ud569\ub2c8\ub2e4. MainActivity.java \ud30c\uc77c\uc5d0\uc11c \uc774 \uae30\ub2a5\uc744 \uad6c\ud604\ud569\ub2c8\ub2e4.<\/p>\n
\uc608\uc81c \ucf54\ub4dc:<\/h4>\npackage controller;\n\nimport android.os.Bundle;\nimport android.view.View;\nimport android.widget.Button;\nimport android.widget.TextView;\nimport androidx.appcompat.app.AppCompatActivity;\nimport model.User;\n\npublic class MainActivity extends AppCompatActivity {\n private TextView textView;\n private Button button;\n private User user;\n\n @Override\n protected void onCreate(Bundle savedInstanceState) {\n super.onCreate(savedInstanceState);\n setContentView(R.layout.activity_main);\n\n textView = findViewById(R.id.textView);\n button = findViewById(R.id.button);\n user = new User(\"John Doe\");\n\n button.setOnClickListener(new View.OnClickListener() {\n @Override\n public void onClick(View v) {\n textView.setText(\"Hello, \" + user.getName());\n }\n });\n }\n}<\/code><\/pre>\n5. \uacb0\ub860<\/h2>\n
\uac1d\uccb4\uc9c0\ud5a5 \ud504\ub85c\uadf8\ub798\ubc0d\uc740 \uac15\ub825\ud55c \ud328\ub7ec\ub2e4\uc784\uc73c\ub85c \uc548\ub4dc\ub85c\uc774\ub4dc \uc560\ud50c\ub9ac\ucf00\uc774\uc158 \uac1c\ubc1c\uc5d0 \ud544\uc218\uc801\uc785\ub2c8\ub2e4. \uc798\ubabb\ub41c OOP \uc6d0\uce59\uc758 \uc801\uc6a9\uc740 \ucf54\ub4dc\uc758 \uac00\ub3c5\uc131\uacfc \uc720\uc9c0 \ubcf4\uc218\uc131\uc744 \uc800\ud558\uc2dc\ud0a4\uc9c0\ub9cc, OOP \uc6d0\uce59\uc744 \uc62c\ubc14\ub974\uac8c \uc774\ud574\ud558\uace0 \uc801\uc6a9\ud55c\ub2e4\uba74 \ud6a8\uc728\uc801\uc774\uace0 \uc548\uc815\uc801\uc778 \uc571\uc744 \uac1c\ubc1c\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774 \uac15\uc88c\uc5d0\uc11c\ub294 OOP\uc758 \uae30\ubcf8 \uac1c\ub150\uacfc \uc790\uc8fc \ubc1c\uc0dd\ud558\ub294 \uc2e4\uc218\ub97c \ub2e4\ub8e8\uc5c8\uc73c\uba70, \uc2e4\uc6a9\uc801\uc778 \uc608\uc81c\ub97c \ud1b5\ud574 OOP\uc758 \uc801\uc6a9 \ubc29\ubc95\uc5d0 \ub300\ud574 \uc54c\uc544\ubcf4\uc558\uc2b5\ub2c8\ub2e4. \uc774\uc81c \uc5ec\ub7ec\ubd84\uc740 \uc790\ubc14\uc640 \uac1d\uccb4\uc9c0\ud5a5 \ud504\ub85c\uadf8\ub798\ubc0d\uc758 \uc6d0\ub9ac\ub97c \ud1b5\ud574 \ub354 \ub098\uc740 \uc548\ub4dc\ub85c\uc774\ub4dc \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc744 \uac1c\ubc1c\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<\/article>\n
<\/body><\/p>\n","protected":false},"excerpt":{"rendered":"
public class User {\n private String name;\n private int age;\n\n public String getName() {\n return name;\n }\n\n public void setName(String name) {\n this.name = name;\n }\n \n public int getAge() {\n return age;\n }\n\n public void setAge(int age) {\n if (age > 0) {\n this.age = age;\n }\n }\n}<\/code><\/pre>\n2.2 \ube44\ud6a8\uc728\uc801\uc778 \uc0c1\uc18d \uc0ac\uc6a9<\/h3>\n
\uc0c1\uc18d\uc744 \ub0a8\uc6a9\ud558\uba74 \ucf54\ub4dc\uac00 \ubcf5\uc7a1\ud574\uc9c0\uace0, \ucd94\uc801\ud558\uae30 \uc5b4\ub824\uc6b4 \ubc84\uadf8\uac00 \ubc1c\uc0dd\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ud544\uc694\ud55c \uacbd\uc6b0\uc5d0\ub9cc \ud074\ub798\uc2a4\ub97c \uc0c1\uc18d\ud558\uace0, \uac00\ub2a5\ud55c \ud55c ‘\uad6c\uc131(Composition)’\uc744 \uc0ac\uc6a9\ud558\ub294 \uac83\uc774 \uc88b\uc2b5\ub2c8\ub2e4.<\/p>\n
\uc608\uc81c \ucf54\ub4dc:<\/h4>\npublic class Car {\n private Engine engine;\n\n public Car(Engine engine) {\n this.engine = engine;\n }\n\n public void start() {\n engine.start();\n }\n}\n\npublic class Engine {\n public void start() {\n System.out.println(\"Engine started\");\n }\n}<\/code><\/pre>\n2.3 \ub2e4\ud615\uc131\uc758 \uc624\uc6a9<\/h3>\n
\ub2e4\ud615\uc131\uc744 \uc0ac\uc6a9\ud560 \ub54c\ub294 \uba54\uc18c\ub4dc \uc624\ubc84\ub85c\ub529\uacfc \uc624\ubc84\ub77c\uc774\ub529\uc758 \ucc28\uc774\ub97c \uc774\ud574\ud574\uc57c \ud569\ub2c8\ub2e4. \ub610\ud55c, \ub2e4\ud615\uc131 \uc0ac\uc6a9\uc758 \ubc94\uc704\ub97c \uba85\ud655\ud788 \ud574\uc57c \ud558\uba70, \uc790\uce6b \uc798\ubabb\ud558\ub2e4\uac04 \ucf54\ub4dc\uc758 \ud750\ub984\uc774 \ubcf5\uc7a1\ud574\uc9c8 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n
\uc608\uc81c \ucf54\ub4dc:<\/h4>\nclass Animal {\n void sound() {\n System.out.println(\"Animal sound\");\n }\n}\n\nclass Dog extends Animal {\n void sound() {\n System.out.println(\"Bark\");\n }\n}\n\nclass Cat extends Animal {\n void sound() {\n System.out.println(\"Meow\");\n }\n}\n\npublic class Main {\n public static void main(String[] args) {\n Animal myDog = new Dog();\n Animal myCat = new Cat();\n\n myDog.sound();\n myCat.sound();\n }\n}<\/code><\/pre>\n3. \uac1d\uccb4\uc9c0\ud5a5 \uc124\uacc4 \uc6d0\uce59(SOLID)<\/h2>\n
SOLID \uc6d0\uce59\uc740 \uac1d\uccb4\uc9c0\ud5a5 \uc124\uacc4\ub97c \ub354 \uc798 \ud558\uae30 \uc704\ud55c \ub2e4\uc12f \uac00\uc9c0 \uc6d0\uce59\uc744 \uc815\ub9ac\ud55c \uac83\uc785\ub2c8\ub2e4. \uc774 \uc6d0\uce59\uc744 \uae30\uc5b5\ud558\uace0 \ud65c\uc6a9\ud558\uba74 \ub354 \ub098\uc740 \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc744 \uc124\uacc4\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n
3.1 \ub2e8\uc77c \ucc45\uc784 \uc6d0\uce59(SRP)<\/h3>\n
\ud55c \ud074\ub798\uc2a4\ub294 \uc624\uc9c1 \ud558\ub098\uc758 \ucc45\uc784\ub9cc \uac00\uc838\uc57c \ud558\uba70, \uadf8 \ucc45\uc784\uc774 \uc644\uc804\ud788 \ucea1\uc290\ud654\ub418\uc5b4\uc57c \ud569\ub2c8\ub2e4. \uc774\ub97c \ud1b5\ud574 \ud074\ub798\uc2a4\uc758 \uc7ac\uc0ac\uc6a9\uc131\uc744 \ub192\uc774\uace0, \ubcc0\uacbd\uc774 \uc6a9\uc774\ud558\uac8c \ud569\ub2c8\ub2e4.<\/p>\n
3.2 \uac1c\ubc29-\ud3d0\uc1c4 \uc6d0\uce59(OCP)<\/h3>\n
\uc18c\ud504\ud2b8\uc6e8\uc5b4 \uc694\uc18c\ub294 \ud655\uc7a5\uc5d0\ub294 \uc5f4\ub824 \uc788\uc5b4\uc57c \ud558\uace0, \uc218\uc815\uc5d0\ub294 \ub2eb\ud600 \uc788\uc5b4\uc57c \ud569\ub2c8\ub2e4. \uc774\ub97c \ud1b5\ud574 \uae30\uc874 \ucf54\ub4dc\ub97c \ubcc0\uacbd\ud558\uc9c0 \uc54a\uace0\ub3c4 \uc0c8\ub85c\uc6b4 \uae30\ub2a5\uc744 \ucd94\uac00\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n
3.3 \ub9ac\uc2a4\ucf54\ud504 \uce58\ud658 \uc6d0\uce59(LSP)<\/h3>\n
\ubd80\ubaa8 \ud074\ub798\uc2a4\uc758 \uac1d\uccb4\uac00 \uc790\uc2dd \ud074\ub798\uc2a4\uc758 \uac1d\uccb4\ub85c \ub300\uccb4\ub420 \uc218 \uc788\uc5b4\uc57c \ud569\ub2c8\ub2e4. \uc774\ub97c \ud1b5\ud574 \uc2dc\uc2a4\ud15c\uc758 \uc548\uc815\uc131\uc744 \uc720\uc9c0\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n
3.4 \uc778\ud130\ud398\uc774\uc2a4 \ubd84\ub9ac \uc6d0\uce59(ISP)<\/h3>\n
\ud074\ub77c\uc774\uc5b8\ud2b8\ub294 \uc790\uc2e0\uc774 \uc0ac\uc6a9\ud558\uc9c0 \uc54a\ub294 \uba54\uc18c\ub4dc\uc5d0 \uc758\uc874\ud558\uc9c0 \uc54a\uc544\uc57c \ud569\ub2c8\ub2e4. \uc774\ub294 \ubd88\ud544\uc694\ud55c \uae30\ub2a5\uc744 \uac15\uc81c\ub85c \uad6c\ud604\ud558\ub294 \uac83\uc744 \ubc29\uc9c0\ud569\ub2c8\ub2e4.<\/p>\n
3.5 \uc758\uc874\uc131 \uc5ed\uc804 \uc6d0\uce59(DIP)<\/h3>\n
\uace0\uc218\uc900 \ubaa8\ub4c8\uc740 \uc800\uc218\uc900 \ubaa8\ub4c8\uc5d0 \uc758\uc874\ud558\uba74 \uc548 \ub418\uba70, \ub450 \ubaa8\ub4c8 \ubaa8\ub450 \ucd94\uc0c1\ud654\uc5d0 \uc758\uc874\ud574\uc57c \ud569\ub2c8\ub2e4. \uc774\ub97c \ud1b5\ud574 \ubaa8\ub4c8 \uac04\uc758 \uacb0\ud569\ub3c4\ub97c \ub0ae\ucd9c \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n
4. \uc548\ub4dc\ub85c\uc774\ub4dc \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc5d0\uc11c OOP \uc801\uc6a9\ud558\uae30<\/h2>\n
\uc774\uc81c \uc548\ub4dc\ub85c\uc774\ub4dc \uc560\ud50c\ub9ac\ucf00\uc774\uc158 \uac1c\ubc1c\uc5d0\uc11c OOP \uc6d0\uce59\uc744 \uc5b4\ub5bb\uac8c \uc801\uc6a9\ud560 \uc218 \uc788\ub294\uc9c0 \uc0b4\ud3b4\ubcf4\uaca0\uc2b5\ub2c8\ub2e4. Android Studio IDE\ub97c \uc0ac\uc6a9\ud558\uc5ec \uac04\ub2e8\ud55c \uc608\uc81c\ub97c \ub9cc\ub4e4\uc5b4 \ubcf4\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n
4.1 \ud504\ub85c\uc81d\ud2b8 \uad6c\uc131<\/h3>\n
\uc548\ub4dc\ub85c\uc774\ub4dc \uc2a4\ud29c\ub514\uc624\uc5d0\uc11c \uc0c8 \ud504\ub85c\uc81d\ud2b8\ub97c \uc0dd\uc131\ud558\uace0, \uae30\ubcf8 \ud15c\ud50c\ub9bf\uc744 \uc120\ud0dd\ud569\ub2c8\ub2e4. \uc774\ud6c4 \ub2e4\uc74c\uacfc \uac19\uc774 \ud328\ud0a4\uc9c0 \uad6c\uc870\ub97c \uc124\uc815\ud569\ub2c8\ub2e4:<\/p>\n
\n- com.example.myapp<\/li>\n
- model<\/li>\n
- view<\/li>\n
- controller<\/li>\n<\/ul>\n
4.2 Model \uc815\uc758\ud558\uae30<\/h3>\n
\uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc758 \ub370\uc774\ud130\ub97c \ud45c\ud604\ud558\ub294 \ubaa8\ub378 \ud074\ub798\uc2a4\ub97c \uc0dd\uc131\ud569\ub2c8\ub2e4. \uc608\ub97c \ub4e4\uc5b4, \uc0ac\uc6a9\uc790(User) \ubaa8\ub378\uc744 \uc815\uc758\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n
\uc608\uc81c \ucf54\ub4dc:<\/h4>\npackage model;\n\npublic class User {\n private String name;\n\n public User(String name) {\n this.name = name;\n }\n\n public String getName() {\n return name;\n }\n}<\/code><\/pre>\n4.3 View \uc815\uc758\ud558\uae30<\/h3>\n
\uc0ac\uc6a9\uc790 \uc778\ud130\ud398\uc774\uc2a4(UI)\ub97c \uad6c\uc131\ud558\ub294 \ubdf0 \ud074\ub798\uc2a4\ub97c \uc0dd\uc131\ud569\ub2c8\ub2e4. Android\uc758 XML \ub808\uc774\uc544\uc6c3\uc744 \ud65c\uc6a9\ud558\uc5ec UI\ub97c \uc815\uc758\ud569\ub2c8\ub2e4.<\/p>\n
activity_main.xml \uc608\uc81c:<\/h4>\n<LinearLayout xmlns:android=\"http:\/\/schemas.android.com\/apk\/res\/android\"\n android:layout_width=\"match_parent\"\n android:layout_height=\"match_parent\"\n android:orientation=\"vertical\">\n\n <TextView\n android:id=\"@+id\/textView\"\n android:layout_width=\"wrap_content\"\n android:layout_height=\"wrap_content\"\n android:text=\"Welcome\" \/>\n\n <Button\n android:id=\"@+id\/button\"\n android:layout_width=\"wrap_content\"\n android:layout_height=\"wrap_content\"\n android:text=\"Click Me\" \/>\n<\/LinearLayout><\/code><\/pre>\n4.4 Controller \uc815\uc758\ud558\uae30<\/h3>\n
UI\uc640 \ubaa8\ub378 \uac04\uc758 \uc0c1\ud638\uc791\uc6a9\uc744 \uad00\ub9ac\ud558\ub294 \ucee8\ud2b8\ub864\ub7ec \ud074\ub798\uc2a4\ub97c \uc815\uc758\ud569\ub2c8\ub2e4. MainActivity.java \ud30c\uc77c\uc5d0\uc11c \uc774 \uae30\ub2a5\uc744 \uad6c\ud604\ud569\ub2c8\ub2e4.<\/p>\n
\uc608\uc81c \ucf54\ub4dc:<\/h4>\npackage controller;\n\nimport android.os.Bundle;\nimport android.view.View;\nimport android.widget.Button;\nimport android.widget.TextView;\nimport androidx.appcompat.app.AppCompatActivity;\nimport model.User;\n\npublic class MainActivity extends AppCompatActivity {\n private TextView textView;\n private Button button;\n private User user;\n\n @Override\n protected void onCreate(Bundle savedInstanceState) {\n super.onCreate(savedInstanceState);\n setContentView(R.layout.activity_main);\n\n textView = findViewById(R.id.textView);\n button = findViewById(R.id.button);\n user = new User(\"John Doe\");\n\n button.setOnClickListener(new View.OnClickListener() {\n @Override\n public void onClick(View v) {\n textView.setText(\"Hello, \" + user.getName());\n }\n });\n }\n}<\/code><\/pre>\n5. \uacb0\ub860<\/h2>\n
\uac1d\uccb4\uc9c0\ud5a5 \ud504\ub85c\uadf8\ub798\ubc0d\uc740 \uac15\ub825\ud55c \ud328\ub7ec\ub2e4\uc784\uc73c\ub85c \uc548\ub4dc\ub85c\uc774\ub4dc \uc560\ud50c\ub9ac\ucf00\uc774\uc158 \uac1c\ubc1c\uc5d0 \ud544\uc218\uc801\uc785\ub2c8\ub2e4. \uc798\ubabb\ub41c OOP \uc6d0\uce59\uc758 \uc801\uc6a9\uc740 \ucf54\ub4dc\uc758 \uac00\ub3c5\uc131\uacfc \uc720\uc9c0 \ubcf4\uc218\uc131\uc744 \uc800\ud558\uc2dc\ud0a4\uc9c0\ub9cc, OOP \uc6d0\uce59\uc744 \uc62c\ubc14\ub974\uac8c \uc774\ud574\ud558\uace0 \uc801\uc6a9\ud55c\ub2e4\uba74 \ud6a8\uc728\uc801\uc774\uace0 \uc548\uc815\uc801\uc778 \uc571\uc744 \uac1c\ubc1c\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774 \uac15\uc88c\uc5d0\uc11c\ub294 OOP\uc758 \uae30\ubcf8 \uac1c\ub150\uacfc \uc790\uc8fc \ubc1c\uc0dd\ud558\ub294 \uc2e4\uc218\ub97c \ub2e4\ub8e8\uc5c8\uc73c\uba70, \uc2e4\uc6a9\uc801\uc778 \uc608\uc81c\ub97c \ud1b5\ud574 OOP\uc758 \uc801\uc6a9 \ubc29\ubc95\uc5d0 \ub300\ud574 \uc54c\uc544\ubcf4\uc558\uc2b5\ub2c8\ub2e4. \uc774\uc81c \uc5ec\ub7ec\ubd84\uc740 \uc790\ubc14\uc640 \uac1d\uccb4\uc9c0\ud5a5 \ud504\ub85c\uadf8\ub798\ubc0d\uc758 \uc6d0\ub9ac\ub97c \ud1b5\ud574 \ub354 \ub098\uc740 \uc548\ub4dc\ub85c\uc774\ub4dc \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc744 \uac1c\ubc1c\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<\/article>\n
<\/body><\/p>\n","protected":false},"excerpt":{"rendered":"