[Android] TextInputLayout

1. layout

  <android.support.design.widget.TextInputLayout 
                   android:layout_width="match_parent"
                   android:layout_height="wrap_content"
                   app:hintTextAppearance="@style/TextAppearance.App.TextInputLayout" >
                  <EditText
                        android:id="@+id/et_name" 
                        android:layout_width="match_parent"
                        android:layout_height="50dp"
                        android:text="@{viewModel.name}"
                        android:inputType="textPersonName"
                        android:textColorHint="HINT_COLOR"
                        android:hint="이름을 입력해주세요." 
                        android:textSize="16sp"/>
              </android.support.design.widget.TextInputLayout>

2. change label color

- 미지정시, textColorHint 값과 동일

    <style name="TextAppearance.App.TextInputLayout" parent="@android:style/TextAppearance">
          <item name="android:textColor">LABEL_COLOR</item>
          <item name="android:textSize">LABEL_SIZE</item>
      </style>