android - actionSearch Edittex 上的数据绑定(bind)

Question

kotlin中如何通过@BindingAdapter绑定(bind)点击软键盘actionSearch按钮时的数据？

我的编辑文本:

<android.support.v7.widget.AppCompatEditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:padding="10dp"
        android:text="@{viewModel.text}"
        android:hint="@string/edit_text_hint"
        android:imeOptions="actionSearch"/>

我的 View 模型:

class RelationListViewModel: BaseViewModel(){
   //..    
    val text: MutableLiveData<String> = MutableLiveData()

Answer 1

为setOnEditorActionListener添加一个BindingAdapter

class ViewModel {
    private val editorActionListener: TextView.OnEditorActionListener

    init {
        this.editorActionListener = TextView.OnEditorActionListener { v, actionId, event ->
            if (actionId == EditorInfo.IME_ACTION_SEARCH) {
                // do your search logic
                true
            } else false
        }
    }

    companion object {

        @BindingAdapter("onEditorActionListener")
        fun bindOnEditorActionListener(editText: EditText, editorActionListener: TextView.OnEditorActionListener) {
            editText.setOnEditorActionListener(editorActionListener)
        }
    }
}

并在您的 xml 中使用它

<android.support.v7.widget.AppCompatEditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:padding="10dp"
        android:text="@{viewModel.text}"
        android:hint="@string/edit_text_hint"
        android:imeOptions="actionSearch"
        app:onEditorActionListener="@{viewModel.editorActionListener}"/>