Android studio 2.1 数据绑定无法解析符号
Android studio 2.1 databinding cannot resolve symbol
我的项目结构如下
我已将 dataBinding { enabled true } 添加到 build.gradle (module app)
我已将 classpath "com.android.databinding:dataBinder:1.0-rc4" 添加到 build.gradle(project)
我的 activity 的布局是 activity_fullscreen.xml 所以我尝试使用 ActivityFullscreenBinding 但它带来了 "cannot resolve symbol" 错误。有什么我需要导入的吗？仅供参考，我正在使用 android studio 2.1
我已经在使用 gradle 2.1.0
这里是activity_fullscreen.xml
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:background="@android:color/white"
tools:context="com.roha.lungo.FullscreenActivity">
<!-- The primary full-screen view. This can be replaced with whatever view
is needed to present your content, e.g. VideoView, SurfaceView,
TextureView, etc. -->
<RelativeLayout
android:background="@android:color/black"
android:layout_width="match_parent"
android:id="@+id/relativeLayout"
android:layout_height="match_parent">
<android.support.v4.view.ViewPager
android:id="@+id/view_pager"
android:layout_width="match_parent"
layout_behavior="@string/appbar_scrolling_view_behavior"
android:layout_height="wrap_content"></android.support.v4.view.ViewPager>
<android.support.design.widget.FloatingActionButton
android:id="@+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:layout_margin="16dp"
android:onClick="@{FabHandler::onBaseFabClick}"
android:src="@drawable/ic_mic_black_24dp" />
<LinearLayout
android:id="@+id/fab_menu_one_layout"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="12dp"
android:layout_marginEnd="24dp"
android:layout_marginRight="24dp"
android:gravity="center_vertical"
android:orientation="horizontal"
android:visibility="invisible"
android:layout_alignParentRight="true"
android:layout_above="@id/fab"
>
<TextView
android:id="@+id/shareLabelTextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_marginRight="8dp"
android:background="@drawable/circle_background_red"
android:elevation="2dp"
android:fontFamily="sans-serif"
android:padding="5dip"
android:text="Share"
android:textColor="@android:color/white"
android:typeface="normal" />
<android.support.design.widget.FloatingActionButton
android:id="@+id/shareFab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:clickable="true"
android:onClick="@{FabHandler::onShareFabClick}"
android:tint="@android:color/white"
fabSize="mini"
srcCompat="@android:drawable/arrow_down_float"/>
</LinearLayout>
<LinearLayout
android:id="@+id/fab_menu_two_layout"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="24dp"
android:layout_marginEnd="24dp"
android:layout_marginRight="24dp"
android:gravity="center_vertical"
android:orientation="horizontal"
android:visibility="invisible"
android:layout_alignParentRight="true"
android:layout_above="@id/fab_menu_one_layout"
>
<TextView
android:id="@+id/createLabelTextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_marginRight="8dp"
android:background="@drawable/circle_background_red"
android:elevation="2dp"
android:fontFamily="sans-serif"
android:padding="5dip"
android:text="Create"
android:textColor="@android:color/white"
android:typeface="normal" />
<android.support.design.widget.FloatingActionButton
android:id="@+id/createFab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:clickable="true"
android:onClick="@{FabHandler::onCreateFabClick}"
android:tint="@android:color/white"
app:fabSize="mini"
app:srcCompat="@android:drawable/btn_star_big_on" />
</LinearLayout>
</RelativeLayout>
<!-- This FrameLayout insets its children based on system windows using
android:fitsSystemWindows. -->
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true">
<RelativeLayout
android:id="@+id/fullscreen_content_controls"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom|right"
android:orientation="horizontal"
tools:ignore="UselessParent">
</RelativeLayout>
</FrameLayout>
</FrameLayout>
布局 xml 应由 layout 标记包裹。
你的activity_fullscreen.xml应该是这样的：
<layout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools">
<FrameLayout xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@android:color/white"
tools:context="com.roha.lungo.FullscreenActivity">
...
</FrameLayout>
</layout>
然后从 AndroidStudio 的菜单中重建您的项目：
Build -> RebuildProject.
会出现错误：
Error:(34, 40) Identifiers must have user defined types from the XML file. FabHandler is missing it
您可以通过添加 data 标签来解决这个问题。
请参考这份文件。
https://developer.android.com/topic/libraries/data-binding/index.html
我的项目结构如下
我已将 dataBinding { enabled true } 添加到 build.gradle (module app)
我已将 classpath "com.android.databinding:dataBinder:1.0-rc4" 添加到 build.gradle(project)
我的 activity 的布局是 activity_fullscreen.xml 所以我尝试使用 ActivityFullscreenBinding 但它带来了 "cannot resolve symbol" 错误。有什么我需要导入的吗？仅供参考，我正在使用 android studio 2.1
我已经在使用 gradle 2.1.0
这里是activity_fullscreen.xml
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:background="@android:color/white"
tools:context="com.roha.lungo.FullscreenActivity">
<!-- The primary full-screen view. This can be replaced with whatever view
is needed to present your content, e.g. VideoView, SurfaceView,
TextureView, etc. -->
<RelativeLayout
android:background="@android:color/black"
android:layout_width="match_parent"
android:id="@+id/relativeLayout"
android:layout_height="match_parent">
<android.support.v4.view.ViewPager
android:id="@+id/view_pager"
android:layout_width="match_parent"
layout_behavior="@string/appbar_scrolling_view_behavior"
android:layout_height="wrap_content"></android.support.v4.view.ViewPager>
<android.support.design.widget.FloatingActionButton
android:id="@+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:layout_margin="16dp"
android:onClick="@{FabHandler::onBaseFabClick}"
android:src="@drawable/ic_mic_black_24dp" />
<LinearLayout
android:id="@+id/fab_menu_one_layout"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="12dp"
android:layout_marginEnd="24dp"
android:layout_marginRight="24dp"
android:gravity="center_vertical"
android:orientation="horizontal"
android:visibility="invisible"
android:layout_alignParentRight="true"
android:layout_above="@id/fab"
>
<TextView
android:id="@+id/shareLabelTextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_marginRight="8dp"
android:background="@drawable/circle_background_red"
android:elevation="2dp"
android:fontFamily="sans-serif"
android:padding="5dip"
android:text="Share"
android:textColor="@android:color/white"
android:typeface="normal" />
<android.support.design.widget.FloatingActionButton
android:id="@+id/shareFab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:clickable="true"
android:onClick="@{FabHandler::onShareFabClick}"
android:tint="@android:color/white"
fabSize="mini"
srcCompat="@android:drawable/arrow_down_float"/>
</LinearLayout>
<LinearLayout
android:id="@+id/fab_menu_two_layout"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="24dp"
android:layout_marginEnd="24dp"
android:layout_marginRight="24dp"
android:gravity="center_vertical"
android:orientation="horizontal"
android:visibility="invisible"
android:layout_alignParentRight="true"
android:layout_above="@id/fab_menu_one_layout"
>
<TextView
android:id="@+id/createLabelTextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_marginRight="8dp"
android:background="@drawable/circle_background_red"
android:elevation="2dp"
android:fontFamily="sans-serif"
android:padding="5dip"
android:text="Create"
android:textColor="@android:color/white"
android:typeface="normal" />
<android.support.design.widget.FloatingActionButton
android:id="@+id/createFab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:clickable="true"
android:onClick="@{FabHandler::onCreateFabClick}"
android:tint="@android:color/white"
app:fabSize="mini"
app:srcCompat="@android:drawable/btn_star_big_on" />
</LinearLayout>
</RelativeLayout>
<!-- This FrameLayout insets its children based on system windows using
android:fitsSystemWindows. -->
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true">
<RelativeLayout
android:id="@+id/fullscreen_content_controls"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom|right"
android:orientation="horizontal"
tools:ignore="UselessParent">
</RelativeLayout>
</FrameLayout>
</FrameLayout>
布局 xml 应由 layout 标记包裹。
你的activity_fullscreen.xml应该是这样的：
<layout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools">
<FrameLayout xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@android:color/white"
tools:context="com.roha.lungo.FullscreenActivity">
...
</FrameLayout>
</layout>
然后从 AndroidStudio 的菜单中重建您的项目：
Build -> RebuildProject.
会出现错误：
Error:(34, 40) Identifiers must have user defined types from the XML file. FabHandler is missing it
您可以通过添加 data 标签来解决这个问题。
请参考这份文件。
https://developer.android.com/topic/libraries/data-binding/index.html