{"id":1138,"date":"2019-03-15T15:08:15","date_gmt":"2019-03-15T06:08:15","guid":{"rendered":"https:\/\/www.charlezz.com\/?p=1138"},"modified":"2019-03-15T15:08:15","modified_gmt":"2019-03-15T06:08:15","slug":"databinding%ec%9d%84-%ec%82%ac%ec%9a%a9%ec%8b%9c-textview%ec%9d%98-%ed%85%8d%ec%8a%a4%ed%8a%b8%ea%b0%80-%eb%b3%80%ea%b2%bd%eb%90%98%ec%a7%80-%ec%95%8a%eb%8a%94-%ea%b2%bd%ec%9a%b0","status":"publish","type":"post","link":"https:\/\/charlezz.com\/?p=1138","title":{"rendered":"DataBinding\uc744 \uc0ac\uc6a9\uc2dc TextView\uc758 \ud14d\uc2a4\ud2b8\uac00 \ubcc0\uacbd\ub418\uc9c0 \uc54a\ub294 \uacbd\uc6b0"},"content":{"rendered":"

LiveData\uc640 DataBinding\uc744 \uc774\uc6a9\ud558\uc5ec \ub3d9\uc801\uc73c\ub85c TextView\uc758 Text\ub97c \ubcc0\uacbd\ud558\ub294 \ub85c\uc9c1\uc744 \uc801\uc6a9\ud588\uc2b5\ub2c8\ub2e4.
\n\uc608\ub97c\ub4e4\uba74, “Hello World” \ub97c “Hello Charles”\ub294 \uac83\uacfc \uac19\uc774 \ub2e8\uc21c\ud55c \ubcc0\uacbd\uc774\uc600\uc2b5\ub2c8\ub2e4.<\/p>\n

<?xml version=\"1.0\" encoding=\"utf-8\"?>\r\n<layout xmlns:tools=\"http:\/\/schemas.android.com\/tools\" \r\n        xmlns:app=\"http:\/\/schemas.android.com\/apk\/res-auto\">\r\n    <data>\r\n        <variable name=\"viewModel\" type=\"com.charlezz.MainViewModel\"\/>\r\n    <\/data>\r\n\r\n    <TextView\r\n            android:layout_width=\"wrap_content\"\r\n            android:layout_height=\"wrap_content\"\r\n            android:text=\"@{viewModel.text}\"\/>\r\n\r\n<\/layout><\/pre>\n
class MainViewModel: ViewModel (){\r\n\r\n    val text = MutableLiveData<CharSequence>().apply{\r\n        text.value = \"Hello World\"\r\n    }\r\n\r\n    fun changeText(enabled:Boolean){\r\n        text.value = \"Hello Charles\"            \r\n    }\r\n}<\/pre>\n
\uc2e4\uc81c \uc704\uc758 \ucf54\ub4dc\ub294 \ub3d9\uc791\ud558\ub294\ub370 \uc544\ubb34\uc774\uc0c1\uc774 \uc5c6\uc5c8\uc2b5\ub2c8\ub2e4.
\n“Hello World”\uc5d0\uc11c “Hello<\/span> World”\ub85c \ud14d\uc2a4\ud2b8\uc758 \uc77c\ubd80 \uc0c9\uc0c1\ub9cc \ubc14\uafb8\uba74 \uc5b4\ub5bb\uac8c \ub420\uae4c\uc694?<\/p>\n
\uc6b0\uc120 \ud14d\uc2a4\ud2b8\uc758 \uc0c9\uc0c1\uc744 \ubcc0\uacbd\ud558\ub294 \ucf54\ub4dc\ub294 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4.<\/p>\n
class MainViewModel: ViewModel (){\r\n\r\n    val text = MutableLiveData<CharSequence>().apply{\r\n        text.value = \"Hello World\"\r\n    }\r\n\r\n    fun changeText(enabled:Boolean){\r\n        val spannable = SpannableString(\"Hello World\")\r\n        spannable.setSpan(ForegroundColorSpan(Color.BLUE), 0, 5, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)     \r\n        text.value = spnnable\r\n    }\r\n}<\/pre>\n
SpannableString\uc744 \ub9cc\ub4dc\ub294 \uac83\uc774\uc8e0.
\n\uc2e4\ud589\ud558\uba74 \uacb0\uacfc\ub294 \uc5b4\ub5a8\uae4c\uc694?<\/p>\n
“<\/span>Hello<\/span> World”\uac00 \ub418\uae38 \uae30\ub300\ud588\uc9c0\ub9cc \uc544\ubb34\ub7f0 \ubcc0\ud654\uac00 \uc0dd\uae30\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4.<\/p>\n
DataBinding\uc744 \uc0ac\uc6a9\ud558\uac8c \ub418\uba74 \ub808\uc774\uc544\uc6c3\uc5d0 \ub300\ud55c LayoutNameBindingImpl<\/strong>\uac1d\uccb4\uac00 \uc0dd\uc131\ub418\uace0, \uac01 \uc704\uc82f\uc5d0 \ub9de\ub294 \uae30 \uc815\uc758\ub41c BindingAdapter\ub97c \ud1b5\ud574\uc11c \ub370\uc774\ud130\uc640 \ubdf0\uac00 \ubc14\uc778\ub529 \ub429\ub2c8\ub2e4. TextView\uc758 \uacbd\uc6b0 TextViewBindingAdapter\uac00 \ucc38\uc870\ub429\ub2c8\ub2e4.<\/p>\n
public class TextViewBindingAdapter {\r\n    ...\r\n    @BindingAdapter(\"android:text\")\r\n    public static void setText(TextView view, CharSequence text) {\r\n        final CharSequence oldText = view.getText();\r\n        if (text == oldText || (text == null && oldText.length() == 0)) {\r\n            return;\r\n        }\r\n        if (text instanceof Spanned) {\r\n            if (text.equals(oldText)) {\r\n                return; \/\/ No change in the spans, so don't set anything.\r\n            }\r\n        } else if (!haveContentsChanged(text, oldText)) {\r\n            return; \/\/ No content changes, so don't set anything.\r\n        }\r\n        view.setText(text);\r\n    }\r\n    ...\r\n}<\/pre>\n
\uc2e4\ud589\uc2dc text\uac00 \uc544\uc9c1 \ucd08\uae30\ud654\ub418\uc9c0 \uc54a\uc740\ucc44\ub85c \ubc14\uc778\ub529\uc774 \ub418\ub294\uacbd\uc6b0(null)\uc640 \ub3d9\uc77c\ud55c \ud14d\uc2a4\ud2b8\uac00 \ubc18\ubcf5\uc801\uc73c\ub85c \ubc14\uc778\ub529\ub418\ub294 \uacbd\uc6b0\uac00 \uc788\uae30 \ub54c\ubb38\uc5d0, \ud37c\ud3ec\uba3c\uc2a4 \ud5a5\uc0c1\uc744 \uc704\ud574\uc11c view.setText(text)\uac00 \ud638\ucd9c\ub418\uae30 \uae4c\uc9c0 \uba87\uac1c\uc758 \uc870\uac74\ubb38\uc744 \ud1b5\ud574 \uac78\ub7ec\uc8fc\uace0 \uc788\ub294 \ubaa8\uc2b5\uc785\ub2c8\ub2e4. \ubc14\ub85c \uc774\uc810 \ub54c\ubb38\uc785\ub2c8\ub2e4. oldText(Hello World)\uc640 \uc0c8\ub85c \ub4e4\uc5b4\uc624\ub294 text(Hello<\/span> World)\uac00 \uac19\uae30 \ub54c\ubb38\uc5d0 setText(text)\uac00 \ud638\ucd9c\ub418\uc9c0 \uc54a\uc544 \ub80c\ub354\ub9c1 \ub418\uc9c0 \uc54a\uc558\ub358 \uac83\uc774\uc8e0.<\/p>\n
\uadf8\ub798\uc11c \uc544\ub798\uc640 \uac19\uc774 \uc800\ub294 CustomBindingAdapter\ub85c \ud574\uacb0\uc744 \ud588\uc2b5\ub2c8\ub2e4.<\/p>\n
@BindingAdapter(\"textByForce\")\r\npublic static void setText(EditText view, CharSequence text){\r\n    if(TextUtils.isEmpty(text)){\r\n        return;\r\n    }\r\n    view.setText(text);\r\n}<\/pre>\n
<?xml version=\"1.0\" encoding=\"utf-8\"?>\r\n<layout xmlns:tools=\"http:\/\/schemas.android.com\/tools\" \r\n        xmlns:app=\"http:\/\/schemas.android.com\/apk\/res-auto\">\r\n    <data>\r\n        <variable name=\"viewModel\" type=\"com.charlezz.MainViewModel\"\/>\r\n    <\/data>\r\n\r\n    <TextView\r\n            android:layout_width=\"wrap_content\"\r\n            android:layout_height=\"wrap_content\"\r\n            app:textByForce=\"@{viewModel.text}\"\/>\r\n\r\n<\/layout><\/pre>\n
 <\/p>\n","protected":false},"excerpt":{"rendered":"
LiveData\uc640 DataBinding\uc744 \uc774\uc6a9\ud558\uc5ec \ub3d9\uc801\uc73c\ub85c TextView\uc758 Text\ub97c \ubcc0\uacbd\ud558\ub294 \ub85c\uc9c1\uc744 \uc801\uc6a9\ud588\uc2b5\ub2c8\ub2e4. \uc608\ub97c\ub4e4\uba74, “Hello World” \ub97c “Hello Charles”\ub294 \uac83\uacfc \uac19\uc774 \ub2e8\uc21c\ud55c \ubcc0\uacbd\uc774\uc600\uc2b5\ub2c8\ub2e4. <?xml version=”1.0″ encoding=”utf-8″?> <layout xmlns:tools=”http:\/\/schemas.android.com\/tools” xmlns:app=”http:\/\/schemas.android.com\/apk\/res-auto”> <data> <variable name=”viewModel” type=”com.charlezz.MainViewModel”\/> <\/data> <TextView android:layout_width=”wrap_content” android:layout_height=”wrap_content” android:text=”@{viewModel.text}”\/> <\/layout> class MainViewModel: ViewModel (){ val text = MutableLiveData<CharSequence>().apply{ text.value = “Hello World” } fun changeText(enabled:Boolean){ […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"inline_featured_image":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0},"categories":[5],"tags":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/charlezz.com\/index.php?rest_route=\/wp\/v2\/posts\/1138"}],"collection":[{"href":"https:\/\/charlezz.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/charlezz.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/charlezz.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/charlezz.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1138"}],"version-history":[{"count":2,"href":"https:\/\/charlezz.com\/index.php?rest_route=\/wp\/v2\/posts\/1138\/revisions"}],"predecessor-version":[{"id":1141,"href":"https:\/\/charlezz.com\/index.php?rest_route=\/wp\/v2\/posts\/1138\/revisions\/1141"}],"wp:attachment":[{"href":"https:\/\/charlezz.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1138"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/charlezz.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1138"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/charlezz.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1138"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}