\n1. \uc11c\ub860<\/h2>\n
\uc548\ub4dc\ub85c\uc774\ub4dc \uc571 \uac1c\ubc1c\uc744 \uc2dc\uc791\ud558\uba74\uc11c \uac00\uc7a5 \ud765\ubbf8\ub85c\uc6b4 \ud504\ub85c\uc81d\ud2b8 \uc911 \ud558\ub098\ub294 \uc804\ud654 \uc571\uc758 \ud0a4\ud328\ub4dc \ud654\uba74\uc744 \ub9cc\ub4dc\ub294 \uac83\uc785\ub2c8\ub2e4. \uc774 \uac15\uc88c\uc5d0\uc11c\ub294 \uc790\ubc14 \uc5b8\uc5b4\ub97c \uc0ac\uc6a9\ud558\uc5ec \uc804\ud654\uae30\uc758 \uae30\ubcf8 \uae30\ub2a5\uc778 \ud0a4\ud328\ub4dc\ub97c \uad6c\ud604\ud558\ub294 \ubc29\ubc95\uc744 \ubc30\uc6c1\ub2c8\ub2e4. \ud0a4\ud328\ub4dc\ub294 \uc0ac\uc6a9\uc790\uc5d0\uac8c \uc804\ud654\ubc88\ud638\ub97c \uc785\ub825\ud560 \uc218 \uc788\ub294 \uc778\ud130\ud398\uc774\uc2a4\ub97c \uc81c\uacf5\ud558\uba70, \uac04\ub2e8\ud55c \ub808\uc774\uc544\uc6c3\uacfc \ubc84\ud2bc \ud074\ub9ad \uc774\ubca4\ud2b8\ub97c \ud1b5\ud574 \uc804\ud654\ub97c \uac70\ub294 \uae30\ub2a5\uc744 \ud3ec\ud568\ud569\ub2c8\ub2e4.<\/p>\n
\uc774 \uac15\uc88c\uc5d0\uc11c\ub294 XML \ub808\uc774\uc544\uc6c3\uc744 \uc815\uc758\ud558\uace0, Java \ucf54\ub4dc\ub97c \ud1b5\ud574 \ubc84\ud2bc \ud074\ub9ad \uc774\ubca4\ud2b8\ub97c \ucc98\ub9ac\ud558\uba70, \uc804\ud654 \ubc88\ud638\ub97c \uc785\ub825\ud558\uace0 \uc2dc\uac01\uc801\uc73c\ub85c \ud45c\uc2dc\ud558\ub294 \ubc29\ubc95\uc744 \ub2e4\ub8f9\ub2c8\ub2e4. \ub05d\uc73c\ub85c, \uc774\ub7ec\ud55c \uad6c\uc131 \uc694\uc18c\ub4e4\uc744 \ud1b5\ud569\ud558\uc5ec \uc644\uc804\ud55c \ud3f0 \uae30\ub2a5\uc744 \uac16\ucd98 \ud0a4\ud328\ub4dc \ud654\uba74\uc744 \uad6c\ud604\ud560 \uac83\uc785\ub2c8\ub2e4.<\/p>\n<\/section>\n\n2. \uac1c\ubc1c \ud658\uacbd \uc124\uc815<\/h2>\n
\uc548\ub4dc\ub85c\uc774\ub4dc \uc571 \uac1c\ubc1c\uc744 \uc704\ud574 \ud544\uc694\ud55c \uac1c\ubc1c \ud658\uacbd \uc124\uc815 \ubc29\ubc95\uc744 \uc124\uba85\ud558\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n
2.1. Android Studio \uc124\uce58<\/h3>\n
\uba3c\uc800, Android Studio<\/strong>\ub97c \uc124\uce58\ud574\uc57c \ud569\ub2c8\ub2e4. Android Studio\ub294 \uc548\ub4dc\ub85c\uc774\ub4dc \uac1c\ubc1c\uc744 \uc704\ud55c \uacf5\uc2dd IDE\uc785\ub2c8\ub2e4. Google\uc758 \uacf5\uc2dd \uc6f9\uc0ac\uc774\ud2b8\uc5d0\uc11c \uc124\uce58 \ud30c\uc77c\uc744 \ub2e4\uc6b4\ub85c\ub4dc\ud558\uace0 \uc124\uce58 \uacfc\uc815\uc744 \ub530\ub974\uc138\uc694.<\/p>\n2.2. \ud504\ub85c\uc81d\ud2b8 \uc0dd\uc131<\/h3>\n
Android Studio\ub97c \uc2dc\uc791\ud55c \ud6c4, \uc0c8 \ud504\ub85c\uc81d\ud2b8\ub97c \ub9cc\ub4ed\ub2c8\ub2e4. \ub2e4\uc74c \uc124\uc815\uc744 \uc0ac\uc6a9\ud569\ub2c8\ub2e4:<\/p>\n
\n- \uc560\ud50c\ub9ac\ucf00\uc774\uc158 \uc774\ub984: DialerApp<\/strong><\/li>\n
- \ud328\ud0a4\uc9c0 \uc774\ub984: com.example.dialerapp<\/strong><\/li>\n
- \uc800\uc7a5 \uacbd\ub85c: \uc801\uc808\ud55c \uc704\uce58<\/li>\n
- \uc5b8\uc5b4: Java<\/strong><\/li>\n
- \ucd5c\uc18c API \ub808\ubca8: API 21: Android 5.0 (Lollipop)<\/strong><\/li>\n<\/ul>\n
\uc774 \uc124\uc815\uc73c\ub85c \uae30\ubcf8 \uc548\ub4dc\ub85c\uc774\ub4dc \ud504\ub85c\uc81d\ud2b8\uac00 \uc0dd\uc131\ub429\ub2c8\ub2e4.<\/p>\n<\/section>\n\n3. UI \ub808\uc774\uc544\uc6c3 \uad6c\uc131<\/h2>\n
\ub2e4\uc74c \ub2e8\uacc4\ub294 XML \ud30c\uc77c\uc744 \uc0ac\uc6a9\ud558\uc5ec \ud0a4\ud328\ub4dc\uc758 UI \ub808\uc774\uc544\uc6c3\uc744 \uad6c\uc131\ud558\ub294 \uac83\uc785\ub2c8\ub2e4. activity_main.xml<\/code> \ud30c\uc77c\uc744 \uc5f4\uace0 \uc544\ub798\uc640 \uac19\uc774 \uc218\uc815\ud569\ub2c8\ub2e4:<\/p>\n\n <RelativeLayout xmlns:android=\"http:\/\/schemas.android.com\/apk\/res\/android\"\n android:layout_width=\"match_parent\"\n android:layout_height=\"match_parent\">\n\n <TextView\n android:id=\"@+id\/phoneNumberTextView\"\n android:layout_width=\"match_parent\"\n android:layout_height=\"wrap_content\"\n android:textSize=\"30sp\"\n android:padding=\"16dp\"\n android:gravity=\"end\" \/>\n\n <GridLayout\n android:layout_width=\"match_parent\"\n android:layout_height=\"match_parent\"\n android:layout_below=\"@id\/phoneNumberTextView\"\n android:columnCount=\"3\"\n android:rowCount=\"4\">\n\n <Button\n android:id=\"@+id\/button1\"\n android:layout_width=\"0dp\"\n android:layout_height=\"wrap_content\"\n android:text=\"1\"\n android:layout_columnWeight=\"1\"\n android:layout_rowWeight=\"1\" \/>\n\n <Button\n android:id=\"@+id\/button2\"\n android:layout_width=\"0dp\"\n android:layout_height=\"wrap_content\"\n android:text=\"2\"\n android:layout_columnWeight=\"1\"\n android:layout_rowWeight=\"1\" \/>\n\n <Button\n android:id=\"@+id\/button3\"\n android:layout_width=\"0dp\"\n android:layout_height=\"wrap_content\"\n android:text=\"3\"\n android:layout_columnWeight=\"1\"\n android:layout_rowWeight=\"1\" \/>\n\n <Button\n android:id=\"@+id\/button4\"\n android:layout_width=\"0dp\"\n android:layout_height=\"wrap_content\"\n android:text=\"4\"\n android:layout_columnWeight=\"1\"\n android:layout_rowWeight=\"1\" \/>\n\n <Button\n android:id=\"@+id\/button5\"\n android:layout_width=\"0dp\"\n android:layout_height=\"wrap_content\"\n android:text=\"5\"\n android:layout_columnWeight=\"1\"\n android:layout_rowWeight=\"1\" \/>\n\n <Button\n android:id=\"@+id\/button6\"\n android:layout_width=\"0dp\"\n android:layout_height=\"wrap_content\"\n android:text=\"6\"\n android:layout_columnWeight=\"1\"\n android:layout_rowWeight=\"1\" \/>\n\n <Button\n android:id=\"@+id\/button7\"\n android:layout_width=\"0dp\"\n android:layout_height=\"wrap_content\"\n android:text=\"7\"\n android:layout_columnWeight=\"1\"\n android:layout_rowWeight=\"1\" \/>\n\n <Button\n android:id=\"@+id\/button8\"\n android:layout_width=\"0dp\"\n android:layout_height=\"wrap_content\"\n android:text=\"8\"\n android:layout_columnWeight=\"1\"\n android:layout_rowWeight=\"1\" \/>\n\n <Button\n android:id=\"@+id\/button9\"\n android:layout_width=\"0dp\"\n android:layout_height=\"wrap_content\"\n android:text=\"9\"\n android:layout_columnWeight=\"1\"\n android:layout_rowWeight=\"1\" \/>\n\n <Button\n android:id=\"@+id\/buttonStar\"\n android:layout_width=\"0dp\"\n android:layout_height=\"wrap_content\"\n android:text=\"*\"\n android:layout_columnWeight=\"1\"\n android:layout_rowWeight=\"1\" \/>\n\n <Button\n android:id=\"@+id\/button0\"\n android:layout_width=\"0dp\"\n android:layout_height=\"wrap_content\"\n android:text=\"0\"\n android:layout_columnWeight=\"1\"\n android:layout_rowWeight=\"1\" \/>\n\n <Button\n android:id=\"@+id\/buttonPound\"\n android:layout_width=\"0dp\"\n android:layout_height=\"wrap_content\"\n android:text=\"#\"\n android:layout_columnWeight=\"1\"\n android:layout_rowWeight=\"1\" \/>\n\n <\/GridLayout>\n\n <\/RelativeLayout>\n <\/code><\/pre>\n\uc704\uc758 XML \ub808\uc774\uc544\uc6c3\uc740 \uc804\ud654 \ud0a4\ud328\ub4dc\uc758 UI\ub97c \uad6c\uc131\ud569\ub2c8\ub2e4. TextView<\/code>\ub294 \uc785\ub825\ub41c \uc804\ud654\ubc88\ud638\ub97c \ud45c\uc2dc\ud558\uba70, GridLayout<\/code>\uc5d0\ub294 \uc22b\uc790 \ubc84\ud2bc\uc774 \ubc30\uce58\ub418\uc5b4 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<\/section>\n\n4. Java \ucf54\ub4dc \uad6c\ud604<\/h2>\n
\uc774\uc81c \uba54\uc778 \uc561\ud2f0\ube44\ud2f0\uc758 Java \ucf54\ub4dc\ub97c \uc791\uc131\ud558\uc5ec \ubc84\ud2bc \ud074\ub9ad \uc774\ubca4\ud2b8\ub97c \ucc98\ub9ac\ud558\uace0, \ud14d\uc2a4\ud2b8 \ubdf0\uc5d0 \uc785\ub825\ub418\ub294 \uc804\ud654\ubc88\ud638\ub97c \uc5c5\ub370\uc774\ud2b8\ud558\uaca0\uc2b5\ub2c8\ub2e4. MainActivity.java<\/code> \ud30c\uc77c\uc744 \uc5f4\uace0 \ub2e4\uc74c \ucf54\ub4dc\ub97c \ucd94\uac00\ud569\ub2c8\ub2e4:<\/p>\n\n package com.example.dialerapp;\n\n import android.os.Bundle;\n import android.view.View;\n import android.widget.Button;\n import android.widget.TextView;\n import androidx.appcompat.app.AppCompatActivity;\n\n public class MainActivity extends AppCompatActivity {\n\n private TextView phoneNumberTextView;\n\n @Override\n protected void onCreate(Bundle savedInstanceState) {\n super.onCreate(savedInstanceState);\n setContentView(R.layout.activity_main);\n\n phoneNumberTextView = findViewById(R.id.phoneNumberTextView);\n\n setButtonListeners();\n }\n\n private void setButtonListeners() {\n for (int i = 0; i <= 9; i++) {\n final int number = i;\n String buttonID = \"button\" + number;\n int resID = getResources().getIdentifier(buttonID, \"id\", getPackageName());\n Button button = findViewById(resID);\n button.setOnClickListener(new View.OnClickListener() {\n @Override\n public void onClick(View v) {\n appendNumber(String.valueOf(number));\n }\n });\n }\n\n findViewById(R.id.buttonStar).setOnClickListener(new View.OnClickListener() {\n @Override\n public void onClick(View v) {\n appendNumber(\"*\");\n }\n });\n\n findViewById(R.id.buttonPound).setOnClickListener(new View.OnClickListener() {\n @Override\n public void onClick(View v) {\n appendNumber(\"#\");\n }\n });\n }\n\n private void appendNumber(String number) {\n String currentText = phoneNumberTextView.getText().toString();\n phoneNumberTextView.setText(currentText + number);\n }\n }\n <\/code><\/pre>\n\uc704 \ucf54\ub4dc\ub294 \uac01 \ubc84\ud2bc\uc5d0 \ud074\ub9ad \ub9ac\uc2a4\ub108\ub97c \ucd94\uac00\ud558\uc5ec \ubc84\ud2bc\uc774 \ub20c\ub9b4 \ub54c\ub9c8\ub2e4 \uc804\ud654\ubc88\ud638\ub97c \uc785\ub825\ubc1b\uc544 TextView<\/code>\ub97c \uc5c5\ub370\uc774\ud2b8\ud569\ub2c8\ub2e4. setButtonListeners<\/code> \uba54\uc11c\ub4dc\ub294 0\ubd80\ud130 9\uae4c\uc9c0\uc758 \uc22b\uc790 \ubc84\ud2bc\uacfc ‘*’ \ubc0f ‘#’ \ubc84\ud2bc\uc5d0 \ub300\ud55c \ub9ac\uc2a4\ub108\ub97c \uc124\uc815\ud569\ub2c8\ub2e4.<\/p>\n<\/section>\n\n5. \uc804\ud654 \uac78\uae30 \uae30\ub2a5 \ucd94\uac00<\/h2>\n
\uc774\uc81c \uc0ac\uc6a9\uc790\uac00 \uc804\ud654\ubc88\ud638\ub97c \uc785\ub825\ud55c \ud6c4 \uc804\ud654\ub97c \uac78 \uc218 \uc788\ub294 \uae30\ub2a5\uc744 \ucd94\uac00\ud558\uaca0\uc2b5\ub2c8\ub2e4. \uc774\ub97c \uc704\ud574 appendNumber<\/code> \uba54\uc11c\ub4dc\uc5d0 \uc804\ud654 \uac78\uae30 \ubc84\ud2bc\uc744 \ucd94\uac00\ud558\uaca0\uc2b5\ub2c8\ub2e4. \uc804\ud654 \uac78\uae30 \uba54\ub274\ub97c \uc791\uc131\ud558\uace0 \uc804\ud654\ub97c \uac78 \uc218 \uc788\ub3c4\ub85d \ud558\ub824\uba74 \ub2e4\uc74c \ucf54\ub4dc\ub97c \ucd94\uac00 \ud558\uc138\uc694:<\/p>\n\n \/\/ \uc804\ud654 \uac78\uae30 \ubc84\ud2bc\uc744 \uc704\ud55c \ucd94\uac00 \ucf54\ub4dc\n findViewById(R.id.callButton).setOnClickListener(new View.OnClickListener() {\n @Override\n public void onClick(View v) {\n String phoneNumber = phoneNumberTextView.getText().toString();\n if (!phoneNumber.isEmpty()) {\n Intent callIntent = new Intent(Intent.ACTION_DIAL);\n callIntent.setData(Uri.parse(\"tel:\" + phoneNumber));\n startActivity(callIntent);\n }\n }\n });\n <\/code><\/pre>\n\uc774 \ucf54\ub4dc\uc5d0\uc11c\ub294 \uc804\ud654 \uac78\uae30 \ubc84\ud2bc\uc774 \ud074\ub9ad\ub420 \ub54c \ud604\uc7ac \ud14d\uc2a4\ud2b8 \ubdf0\uc758 \ub0b4\uc6a9\uc744 \uac00\uc838\uc640 \uc804\ud654 URI\ub97c \uc0ac\uc6a9\ud558\uc5ec \uc804\ud654\ub97c \uac70\ub294 \uc778\ud150\ud2b8\ub97c \uc2dc\uc791\ud569\ub2c8\ub2e4.<\/p>\n<\/section>\n\n6. \ud14c\uc2a4\ud2b8 \ubc0f \ub514\ubc84\uae45<\/h2>\n
\uc774\uc81c \uc571\uc744 \ube4c\ub4dc\ud558\uace0 \uc2e4\ud589\ud558\uc5ec \ubaa8\ub4e0 \uae30\ub2a5\uc774 \uc81c\ub300\ub85c \uc791\ub3d9\ud558\ub294\uc9c0 \ud655\uc778\ud574\uc57c \ud569\ub2c8\ub2e4. Android Studio\uc5d0\uc11c \u201cRun\u201d \ubc84\ud2bc\uc744 \ud074\ub9ad\ud558\uba74 AVD(Android Virtual Device)\uc5d0\uc11c \uc571\uc774 \uc2e4\ud589\ub429\ub2c8\ub2e4. \uc804\ud654\ubc88\ud638\ub97c \uc785\ub825\ud558\uace0 \uac78\uae30 \ubc84\ud2bc\uc744 \ub20c\ub7ec \uc804\ud654 \ud568\uc218\uac00 \uc815\uc0c1\uc801\uc73c\ub85c \uc791\ub3d9\ud558\ub294\uc9c0 \ud655\uc778\ud558\uc138\uc694.<\/p>\n
\ub610\ud55c, \ubc84\ud2bc\uc5d0 \ub300\ud55c \ud074\ub9ad \uc774\ubca4\ud2b8\uac00 \uc62c\ubc14\ub974\uac8c \uc791\ub3d9\ud558\ub294\uc9c0, \ud14d\uc2a4\ud2b8 \ubdf0\uac00 \uc5c5\ub370\uc774\ud2b8\ub418\ub294\uc9c0 \ud655\uc778\ud558\uae30 \uc704\ud574 \uacc4\uc815\uc774 \ud544\uc694\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ubb38\uc81c\ub97c \ubc1c\uacac\ud558\uba74 Android Studio\uc758 Logcat\uc744 \uc0ac\uc6a9\ud558\uc5ec \uc624\ub958 \uba54\uc2dc\uc9c0\ub97c \ucc3e\uc544 \ub514\ubc84\uae45\ud558\uc138\uc694.<\/p>\n<\/section>\n\n7. \uacb0\ub860<\/h2>\n
\uc774\ubc88 \uac15\uc88c\uc5d0\uc11c\ub294 \uc790\ubc14\ub97c \uc0ac\uc6a9\ud558\uc5ec \uae30\ubcf8\uc801\uc778 \uc804\ud654 \uc571\uc758 \ud0a4\ud328\ub4dc \ud654\uba74\uc744 \ub9cc\ub4e4\uc5b4 \ubcf4\uc558\uc2b5\ub2c8\ub2e4. UI \ub808\uc774\uc544\uc6c3\uc744 XML\ub85c \uad6c\uc131\ud558\uace0, Java \ud074\ub798\uc2a4\ub97c \uc0ac\uc6a9\ud574 \ubc84\ud2bc \ud074\ub9ad \uc774\ubca4\ud2b8\ub97c \ucc98\ub9ac\ud574 \uc804\ud654\ubc88\ud638\ub97c \uc785\ub825\ud560 \uc218 \uc788\uac8c \ub9cc\ub4e4\uc5c8\uc2b5\ub2c8\ub2e4. \ub610\ud55c \uc804\ud654\ubc88\ud638\ub97c \uc2e4\uc81c\ub85c \uc785\ub825\ud558\uace0 \uc804\ud654\ub97c \uac70\ub294 \uae30\ub2a5\uc744 \uad6c\ud604\ud588\uc2b5\ub2c8\ub2e4.<\/p>\n
\uc774\uc81c \uc5ec\ub7ec\ubd84\uc740 \ud0a4\ud328\ub4dc\ub97c \ud65c\uc6a9\ud55c \uc548\ub4dc\ub85c\uc774\ub4dc \uc571\uc758 \uae30\ubcf8 \uad6c\uc131 \uc694\uc18c\ub97c \uc774\ud574\ud558\uace0 \uc788\uc73c\uba70, \uc774\ub97c \ubc14\ud0d5\uc73c\ub85c \ub354 \ubcf5\uc7a1\ud55c \uc751\uc6a9 \ud504\ub85c\uadf8\ub7a8\uc73c\ub85c \ubc1c\uc804\uc2dc\ud0ac \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ub2e4\uc591\ud55c UI \uae30\ub2a5\uc774\ub098 \ucd94\uac00\uc801 \ud6a8\uacfc\ub97c \ub123\uc5b4\ubcf4\uba70 \ub354 \ub098\ub9cc\uc758 \ub3c5\ucc3d\uc801\uc778 \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc744 \ub9cc\ub4e4\uc5b4 \ubcf4\uc138\uc694!<\/p>\n
\ud5a5\ud6c4 \ubc1c\uc804\ub41c \uae30\ub2a5\uc73c\ub85c\ub294 \ucd5c\uadfc \ud1b5\ud654 \uae30\ub85d, \uc990\uaca8\ucc3e\uae30 \uc5f0\ub77d\ucc98 \ucd94\uac00, \uc804\ud654\ubc88\ud638\ubd80\uc5d0\uc11c \uac80\uc0c9\ud558\uae30 \ub4f1\uc744 \ucd94\uac00\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc5ec\ub7ec\ubd84\uc758 \uc571 \uac1c\ubc1c \uc5ec\uc815\uc5d0 \ud589\uc6b4\uc744 \ube55\ub2c8\ub2e4!<\/p>\n<\/section>\n