在 API 19 上获取 ClassCast 异常，但在 API 21 上运行良好

Question

我已经实现了material design navigation drawer 和custom toolbar。它在Lollipop 设备上运行良好。

但是当在Android 4.4.4, it crashes 上运行时出现以下错误：

java.lang.ClassCastException: android.view.ViewGroup$LayoutParams 无法转换为 android.widget.AbsListView$LayoutParams

我没有更改导航抽屉的任何布局。设置抽屉的代码示例：

mNavigationDrawerFragment = (NavigationDrawerFragment) getSupportFragmentManager()
                .findFragmentById(R.id.fragment_drawer);

        // Set up the drawer.
        mNavigationDrawerFragment.setup(R.id.fragment_drawer,
                (DrawerLayout) findViewById(R.id.drawer), mToolbar);

LogCat：

 java.lang.ClassCastException: android.view.ViewGroup$LayoutParams cannot be cast to android.widget.AbsListView$LayoutParams
            at android.widget.ListView.setupChild(ListView.java:1826)
            at android.widget.ListView.makeAndAddView(ListView.java:1793)
            at android.widget.ListView.fillDown(ListView.java:691)
            at android.widget.ListView.fillFromTop(ListView.java:752)
            at android.widget.ListView.layoutChildren(ListView.java:1630)
            at android.widget.AbsListView.onLayout(AbsListView.java:2087)
            at android.view.View.layout(View.java:14857)
            at android.view.ViewGroup.layout(ViewGroup.java:4643)
            at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1671)
            at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1525)
            at android.widget.LinearLayout.onLayout(LinearLayout.java:1434)
            at android.view.View.layout(View.java:14857)
            at android.view.ViewGroup.layout(ViewGroup.java:4643)
            at android.widget.FrameLayout.layoutChildren(FrameLayout.java:453)
            at android.widget.FrameLayout.onLayout(FrameLayout.java:388)
            at android.view.View.layout(View.java:14857)
            at android.view.ViewGroup.layout(ViewGroup.java:4643)
            at android.support.v4.widget.DrawerLayout.onLayout(DrawerLayout.java:907)
            at android.view.View.layout(View.java:14857)
            at android.view.ViewGroup.layout(ViewGroup.java:4643)
            at android.widget.RelativeLayout.onLayout(RelativeLayout.java:1055)
            at android.view.View.layout(View.java:14857)
            at android.view.ViewGroup.layout(ViewGroup.java:4643)
            at android.widget.FrameLayout.layoutChildren(FrameLayout.java:453)
            at android.widget.FrameLayout.onLayout(FrameLayout.java:388)
            at android.view.View.layout(View.java:14857)
            at android.view.ViewGroup.layout(ViewGroup.java:4643)
            at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1671)
            at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1525)
            at android.widget.LinearLayout.onLayout(LinearLayout.java:1434)
            at android.view.View.layout(View.java:14857)
            at android.view.ViewGroup.layout(ViewGroup.java:4643)
            at android.widget.FrameLayout.layoutChildren(FrameLayout.java:453)
            at android.widget.FrameLayout.onLayout(FrameLayout.java:388)
            at android.view.View.layout(View.java:14857)
            at android.view.ViewGroup.layout(ViewGroup.java:4643)
            at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1671)
            at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1525)
            at android.widget.LinearLayout.onLayout(LinearLayout.java:1434)
            at android.view.View.layout(View.java:14857)
            at android.view.ViewGroup.layout(ViewGroup.java:4643)
            at android.widget.FrameLayout.layoutChildren(FrameLayout.java:453)
            at android.widget.FrameLayout.onLayout(FrameLayout.java:388)
            at android.view.View.layout(View.java:14857)
            at android.view.ViewGroup.layout(ViewGroup.java:4643)
            at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2013)
            at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1770)
            at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1019)
            at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5725)
            at android.view.Choreographer$CallbackRecord.run(Choreographer.java:761)
            at android.view.Choreographer.doCallbacks(Choreographer.java:574)
            at android.view.Choreographer.doFrame(Choreographer.java:544)
            at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:747)
            at android.os.Handler.handleCallback(Handler.java:733)
            at android.os.Handler.dispatchMessage(Handler.java:95)
            at android.os.Looper.loop(Looper.java:136)
            at android.app.ActivityThread.main(ActivityThread.java:5086)
            at java.lang.reflect.Method.invoke(Native Method)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)

感谢任何帮助。

Answer 1

Android 在 AppCompat v21 中进行了重大更改。

所以，请参考这个链接： http://android-developers.blogspot.in/2015/04/android-support-library-221.html

Answer 2

我也遇到了同样的问题。我为 GridView 使用了适配器。当我在 getView() 方法中设置 LinearLayout 的 LayoutParams 时会发生此错误。我用这段代码解决了这个问题

linearLayout.setLayoutParams(new GridView.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.MATCH_PARENT));

而不是

linearLayout.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.MATCH_PARENT));

Answer 3

尝试并使用 AppCompatv21。可能不会出现错误，因为 Material design 将与带有此 AppCompat 的 prelollipop 版本兼容。

http://android-developers.blogspot.in/2014/10/appcompat-v21-material-design-for-pre.html