膨胀类android.support.v4.widget.SwipeRefreshLayout

Question

我试图在片段中实现SwipeRefreshLayout。它看起来正确，但我继续得到错误：

Caused by: android.view.InflateException: Binary XML file line #2: 
Binary XML file line #2: Error inflating class 
android.support.v4.widget.SwipeRefreshLayout
Caused by: android.view.InflateException: Binary XML file line #2: 
Error inflating class android.support.v4.widget.SwipeRefreshLayout
Caused by: java.lang.ClassNotFoundException: Didn't find class 
"android.support.v4.widget.SwipeRefreshLayout" on path: 
DexPathList[[zip file "/data/app/com.weather.rainy- 
2/base.apk"],nativeLibraryDirectories=[/data/app/com.weather.rainy- 
2/lib/x86, /system/lib, /vendor/lib]]

我真的不知道造成这种情况的原因。

我的片段布局用于实现SwipeRefreshLayout：

    <android.support.v4.widget.SwipeRefreshLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/swipeToRefresh4Maps"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <RelativeLayout
        android:id="@+id/topRL4Maps"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@drawable/bg_gradient_purple"
        android:paddingLeft="@dimen/activity_horizontal_margin"
        android:paddingTop="64dp"
        android:paddingRight="@dimen/activity_horizontal_margin"
        android:paddingBottom="64dp"
        tools:context="com.weather.rainy.ui.MapsActivity">

        <TextView
            android:id="@+id/yourLocationLabelTextView"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentTop="true"
            android:layout_centerHorizontal="true"
            android:layout_marginTop="15dp"
            android:text="@+string/your_location"
            android:textColor="@android:color/white"
            android:textSize="24sp" />

        <fragment
            android:id="@+id/map"
            android:name="com.google.android.gms.maps.SupportMapFragment"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_above="@+id/addressValueTextView"
            android:layout_alignBottom="@+id/addressValueTextView"
            android:layout_below="@+id/yourLocationLabelTextView"
            android:layout_centerHorizontal="true"
            android:layout_margin="15dp"
            tools:context="com.weather.rainy.ui.MapsActivity" />

        <TextView
            android:id="@+id/addressValueTextView"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignStart="@+id/map"
            android:layout_alignEnd="@+id/map"
            android:layout_alignParentStart="false"
            android:layout_alignParentBottom="true"
            android:text="@+string/..."
            android:textColor="#aaffffff"
            android:textSize="18sp" />
    </RelativeLayout>
</android.support.v4.widget.SwipeRefreshLayout>

而且，我的片段类用于调用SwipeRefreshLayout：

  //Code for Swipe Refresh
    mSwipeRefreshLayout = (SwipeRefreshLayout) findViewById(R.id.swipeToRefresh4Maps);
    mSwipeRefreshLayout.setColorSchemeResources(R.color.Red, R.color.Orange, R.color.Blue, R.color.Green);
    mSwipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
        @Override
        public void onRefresh() {
            Log.v(TAG, "************** MAPS - SWIPE REFRESH EVENT TRIGGERED!!!!!");
            findLocation();
        }
    });

我真的没有任何线索，有什么不对。任何帮助是极大的赞赏。

Answer 1

因为您使用的是AndroidX，所以您的XML引用了错误版本的SwipeRefreshLayout

将XML从android.support.v4.widget.SwipeRefreshLayout更改为androidx.swiperefreshlayout.widget.SwipeRefreshLayout

Answer 2

迁移到AndroidX时似乎会发生此问题，因为在迁移到AndroidX时需要更改许多构建工件。

Solution 1: Do it manually

例如：

android.support.v4.widget.SwipeRefreshLayout改为=> androidx.swiperefreshlayout.widget.SwipeRefreshLayout

您必须更新Migrating to AndroidX中列出的所有构建工件

Solution 2: Automate on Android Studio 3.2+

正如在同一链接中所建议的那样，您可以通过从菜单栏中选择Refactor> Migrate to AndroidX来自动执行此过程。

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附加信息 - 我遇到的错误：

扩展类android.support.constraint.ConstraintLayout时出错

元素WebView不允许在这里