Minimum API Level: API 21: Android 5.0 (Lollipop)<\/li>\n<\/ul>\n\uc774\ud6c4 ‘Finish’\ub97c \ud074\ub9ad\ud558\uc5ec \ud504\ub85c\uc81d\ud2b8\ub97c \uc2dc\uc791\ud569\ub2c8\ub2e4.<\/p>\n
2. \ub808\uc774\uc544\uc6c3 \uc0dd\uc131<\/h2>\n
\uc774\uc81c \uc8fc\uc694 XML \ub808\uc774\uc544\uc6c3 \ud30c\uc77c\uc744 \uc218\uc815\ud558\uc5ec \ud0a4\ud328\ub4dc \ud654\uba74\uc744 \ub514\uc790\uc778\ud569\ub2c8\ub2e4. res\/layout\/activity_main.xml<\/code> \ud30c\uc77c\uc744 \uc5f4\uace0 \uc544\ub798\uc758 \ucf54\ub4dc\ub97c \ucd94\uac00\ud569\ub2c8\ub2e4:<\/p>\n<RelativeLayout xmlns:android=\"http:\/\/schemas.android.com\/apk\/res\/android\"\n android:layout_width=\"match_parent\"\n android:layout_height=\"match_parent\"\n android:padding=\"16dp\">\n\n <TextView\n android:id=\"@+id\/display\"\n android:layout_width=\"match_parent\"\n android:layout_height=\"wrap_content\"\n android:textSize=\"36sp\"\n android:layout_alignParentTop=\"true\"\n android:padding=\"16dp\"\n android:background=\"#e0e0e0\"\n android:gravity=\"end\" \/>\n\n <GridLayout\n android:layout_width=\"match_parent\"\n android:layout_height=\"0dp\"\n android:layout_above=\"@id\/display\"\n android:layout_marginTop=\"16dp\"\n android:rowCount=\"4\"\n android:columnCount=\"3\"\n android:layout_gravity=\"center\">\n\n <Button\n android:id=\"@+id\/button1\"\n android:layout_width=\"0dp\"\n android:layout_height=\"wrap_content\"\n android:layout_columnWeight=\"1\"\n android:text=\"1\"\n android:textSize=\"24sp\" \/>\n\n <Button\n android:id=\"@+id\/button2\"\n android:layout_width=\"0dp\"\n android:layout_height=\"wrap_content\"\n android:layout_columnWeight=\"1\"\n android:text=\"2\"\n android:textSize=\"24sp\" \/>\n\n <Button\n android:id=\"@+id\/button3\"\n android:layout_width=\"0dp\"\n android:layout_height=\"wrap_content\"\n android:layout_columnWeight=\"1\"\n android:text=\"3\"\n android:textSize=\"24sp\" \/>\n\n <Button\n android:id=\"@+id\/button4\"\n android:layout_width=\"0dp\"\n android:layout_height=\"wrap_content\"\n android:layout_columnWeight=\"1\"\n android:text=\"4\"\n android:textSize=\"24sp\" \/>\n\n <Button\n android:id=\"@+id\/button5\"\n android:layout_width=\"0dp\"\n android:layout_height=\"wrap_content\"\n android:layout_columnWeight=\"1\"\n android:text=\"5\"\n android:textSize=\"24sp\" \/>\n\n <Button\n android:id=\"@+id\/button6\"\n android:layout_width=\"0dp\"\n android:layout_height=\"wrap_content\"\n android:layout_columnWeight=\"1\"\n android:text=\"6\"\n android:textSize=\"24sp\" \/>\n\n <Button\n android:id=\"@+id\/button7\"\n android:layout_width=\"0dp\"\n android:layout_height=\"wrap_content\"\n android:layout_columnWeight=\"1\"\n android:text=\"7\"\n android:textSize=\"24sp\" \/>\n\n <Button\n android:id=\"@+id\/button8\"\n android:layout_width=\"0dp\"\n android:layout_height=\"wrap_content\"\n android:layout_columnWeight=\"1\"\n android:text=\"8\"\n android:textSize=\"24sp\" \/>\n\n <Button\n android:id=\"@+id\/button9\"\n android:layout_width=\"0dp\"\n android:layout_height=\"wrap_content\"\n android:layout_columnWeight=\"1\"\n android:text=\"9\"\n android:textSize=\"24sp\" \/>\n\n <Button\n android:id=\"@+id\/button_star\"\n android:layout_width=\"0dp\"\n android:layout_height=\"wrap_content\"\n android:layout_columnWeight=\"1\"\n android:text=\"*\"\n android:textSize=\"24sp\" \/>\n\n <Button\n android:id=\"@+id\/button0\"\n android:layout_width=\"0dp\"\n android:layout_height=\"wrap_content\"\n android:layout_columnWeight=\"1\"\n android:text=\"0\"\n android:textSize=\"24sp\" \/>\n\n <Button\n android:id=\"@+id\/button_hash\"\n android:layout_width=\"0dp\"\n android:layout_height=\"wrap_content\"\n android:layout_columnWeight=\"1\"\n android:text=\"#\"\n android:textSize=\"24sp\" \/>\n\n <\/GridLayout>\n\n<\/RelativeLayout><\/code><\/pre>\n\uc704\uc758 \ucf54\ub4dc\uc5d0\uc11c \uc6b0\ub9ac\ub294 \uac04\ub2e8\ud55c \ud14d\uc2a4\ud2b8 \ubdf0\uc640 \uadf8\ub9ac\ub4dc \ub808\uc774\uc544\uc6c3\uc744 \uc0ac\uc6a9\ud558\uc5ec \ud0a4\ud328\ub4dc\ub97c \ub9cc\ub4e4\uc5c8\uc2b5\ub2c8\ub2e4. \uac01 \ubc84\ud2bc\uc740 0\ubd80\ud130 9\uae4c\uc9c0 \uadf8\ub9ac\uace0 \ubcc4\ud45c(*)\uc640 \uc0f5(#)\uc744 \ud3ec\ud568\ud558\uace0 \uc788\uc2b5\ub2c8\ub2e4. \ub2e4\uc74c\uc73c\ub85c\ub294 \uac01 \ubc84\ud2bc\uc5d0 \ub300\ud55c \ud074\ub9ad \uc774\ubca4\ud2b8\ub97c \uc124\uc815\ud560 \uac83\uc785\ub2c8\ub2e4.<\/p>\n
3. \ubc84\ud2bc \ud074\ub9ad \ub9ac\uc2a4\ub108 \ucd94\uac00<\/h2>\n
\uc774\uc81c MainActivity.kt<\/code> \ud30c\uc77c\uc744 \uc5f4\uace0 \ubc84\ud2bc \ud074\ub9ad \ub9ac\uc2a4\ub108\ub97c \ucd94\uac00\ud558\ub3c4\ub85d \ud558\uaca0\uc2b5\ub2c8\ub2e4. \ucf54\ub4dc\ub97c \uc544\ub798\uc640 \uac19\uc774 \uc218\uc815\ud569\ub2c8\ub2e4:<\/p>\npackage com.example.phonedialer\n\nimport android.os.Bundle\nimport android.view.View\nimport android.widget.Button\nimport android.widget.TextView\nimport androidx.appcompat.app.AppCompatActivity\n\nclass MainActivity : AppCompatActivity() {\n private lateinit var display: TextView\n\n override fun onCreate(savedInstanceState: Bundle?) {\n super.onCreate(savedInstanceState)\n setContentView(R.layout.activity_main)\n\n display = findViewById(R.id.display)\n\n val button1 = findViewById