我一直在尝试使用android数据绑定中的隐式属性侦听器(reference)来控制视图的可见性,它允许通过id访问视图和访问属性,如checked、visible等,但是当尝试使用它时,它抛出如下错误
Error:(119, 29) Identifiers must have user defined types from the XML file. addTodo_switch_remind is missing it<android.support.v7.widget.SwitchCompat
android:id="@+id/addTodo_switch_remind"
style="@style/MediumTextViewStyle"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/addTodo_space_project"
android:text="@string/add_todo_remind_label"
android:textOff="@string/generic_no_text"
android:textOn="@string/generic_yes_text" />
<android.support.v4.widget.Space
android:id="@+id/addTodo_space_remind"
style="@style/FormsSpacingStyle"
android:layout_below="@+id/addTodo_switch_remind" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@id/addTodo_space_remind"
android:orientation="vertical"
android:padding="@dimen/grid_box_single"
android:visibility="@{addTodo_switch_remind.checked ? View.VISIBLE : View.GONE}">发布于 2017-01-12 17:26:05
看起来隐式属性侦听器在表达式中使用驼峰式大小写,多亏了这个post我弄清楚了。
<!--Recurring Reminder -->
<android.support.v7.widget.SwitchCompat
android:id="@+id/addTodo_switch_remind"
style="@style/MediumTextViewStyle"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/addTodo_space_project"
android:text="@string/add_todo_remind_label"
android:textOff="@string/generic_no_text"
android:textOn="@string/generic_yes_text" />
<android.support.v4.widget.Space
android:id="@+id/addTodo_space_remind"
style="@style/FormsSpacingStyle"
android:layout_below="@+id/addTodo_switch_remind" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@id/addTodo_space_remind"
android:orientation="vertical"
android:padding="@dimen/grid_box_single"
android:visibility="@{addTodoSwitchRemind.checked ? View.VISIBLE : View.GONE}">为其他有同样问题的人记录文档
发布于 2018-08-31 11:13:59
当您在.xml文件中使用View.VISIBLE / View.GONE时,您应该通过在数据部分添加<import type="android.view.View"/>来导入View类型,如下所示:
<data>
<import type="android.view.View"/>
<variable
name="viewModel"
type="xx.xx.MyViewModel"/>
</data>发布于 2017-01-12 20:59:03
第1步:创建BindingAdapter
@BindingAdapter("android:visibility")
public static void setVisibility(final View view, @IdRes int layourId) {
SwitchCompat switcher = (SwitchCompat)view.getRootView().findViewById(layourId)
switcher.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener(){
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked)
{
view.setVisibility(isChecked ? View.VISIBLE : View.GONE);
}
}
}Step 2:在you layout.xml的数据绑定数据部分导入R类
<data>
<import type="example.package.R"/>
</data>第3步:将自定义视图绑定到您的切换器,如下所示:
<android.support.v7.widget.SwitchCompat
android:id="@+id/addTodo_switch_remind"/>
<LinearLayout
android:visibility="@{R.id.addTodo_switch_remind">https://stackoverflow.com/questions/41609252
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