小编Ren*_*ens的帖子

我升级到最新的支持库版本,并且滚动FAB行为无效.向下滚动RecyclerView时,它会向下滚动,但是当再次向上滚动时则不会向下滚动.它保持隐藏.降级到25.0.1似乎缓解了这个问题.这里参考的是我用于此的代码.

<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:app="http://schemas.android.com/apk/res-auto"
  xmlns:tools="http://schemas.android.com/tools"
  android:id="@+id/drawer_layout"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:animateLayoutChanges="true"
  android:fitsSystemWindows="true"
  tools:context=".mainhost.MainActivity"
  tools:openDrawer="start">

  <android.support.design.widget.CoordinatorLayout xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main_coordinator_layout_root_view"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".mainhost.MainActivity">

    <android.support.design.widget.AppBarLayout
      android:id="@+id/appbar_layout"
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:theme="@style/AppTheme.AppBarOverlay">

      <android.support.design.widget.CollapsingToolbarLayout
        android:id="@+id/collapsing_toolbar_layout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:fitsSystemWindows="true"
        app:contentScrim="?attr/colorPrimary"
        app:layout_scrollFlags="scroll|enterAlways|snap">

        <android.support.v7.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="match_parent"
        android:layout_height="?attr/actionBarSize"
        android:background="?attr/colorPrimary"
        android:focusableInTouchMode="true"
        app:layout_collapseMode="pin"
        app:popupTheme="@style/AppTheme.PopupOverlay" />

      </android.support.design.widget.CollapsingToolbarLayout>

    </android.support.design.widget.AppBarLayout>

    <!-- Layout for content is here. This can be a RelativeLayout  -->

    <FrameLayout
      android:id="@+id/content_main"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:layout_marginLeft="-3dp"
      android:layout_marginRight="-3dp"
      app:layout_behavior="@string/appbar_scrolling_view_behavior"
      tools:context="com.globyworks.citykey.mainhost.MainActivity" />


    <android.support.design.widget.FloatingActionButton
      android:id="@+id/fab"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_gravity="bottom|end"
      android:layout_margin="@dimen/fab_margin"
      app:layout_behavior="com.globyworks.citykey.helpers.ScrollingFABBehavior"
      android:src="@drawable/drawer_new_report_white" />

  </android.support.design.widget.CoordinatorLayout>


  <android.support.design.widget.NavigationView
    android:id="@+id/navigation_view"
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    android:layout_gravity="start"
    android:background="@android:color/white"
    app:menu="@menu/menu_drawer"> …

当我在新的 Windows 10 机器上运行我的构建时，我收到一个失败的构建，并显示以下消息：

C:\Windows\room-1986fd87-5a68-4d98-8d52-10725d43f799\sqlite-3.20.1-13332950-0c44-4e15-b974-b3790f5ede28-sqlitejdbc.dll.lck (The system cannot find the path specified)

我在Room ORM中有一个项目列表,我想在Recycler视图中显示它.数据正从网络添加到数据库.问题是每次整个列表从Flowable而不是每个项目发出时我都会得到.我试过.distinctUntilChanged没有区别.

@Query("SELECT * FROM items")
Flowable<List<Item>> getItems();

我也尝试过只返回一个只加载第一个db的项目.

我在日志中收到此错误:

Caused by java.lang.ClassCastException: java.net.UnknownHostException cannot be cast to retrofit2.adapter.rxjava.HttpException

那就是我的onError方法.设备没有连接时可能会导致错误.

  @Override
        public void onError(Throwable e) {
            assert e != null;
            Timber.d(e);
            HttpException exception = (HttpException) e;
            assert view != null;
            view.hideRefreshSpinner();
            if (exception.code() == HttpURLConnection.HTTP_BAD_REQUEST) {
                view.showSnackbarInvalidError();
            } else {
                view.showUnauthorizedError();
            }

        }