android - ClassCastException android.widget.AbsListView$LayoutParams 到 android.widget.GridLayout$LayoutParams 此异常是否特定于 API 级别？

Question

我正在尝试将 LinearLayout 动态(膨胀)添加到 GridLayout 中，如下图所示。 GridLayout 在 ListView“行”布局中是静态的。

当我尝试将 LinearLayout 添加到 GridLayout 时，出现错误:

09-01 12:55:54.320: E/AndroidRuntime(4156): FATAL EXCEPTION: main
09-01 12:55:54.320: E/AndroidRuntime(4156): java.lang.ClassCastException: android.widget.AbsListView$LayoutParams cannot be cast to android.widget.GridLayout$LayoutParams
09-01 12:55:54.320: E/AndroidRuntime(4156):  at android.widget.GridLayout.getLayoutParams1(GridLayout.java:729)
09-01 12:55:54.320: E/AndroidRuntime(4156):  at android.widget.GridLayout.validateLayoutParams(GridLayout.java:663)
09-01 12:55:54.320: E/AndroidRuntime(4156):  at android.widget.GridLayout.getLayoutParams(GridLayout.java:734)
09-01 12:55:54.320: E/AndroidRuntime(4156):  at android.widget.GridLayout.measureChildrenWithMargins(GridLayout.java:866)
09-01 12:55:54.320: E/AndroidRuntime(4156):  at android.widget.GridLayout.onMeasure(GridLayout.java:894)
09-01 12:55:54.320: E/AndroidRuntime(4156):  at android.view.View.measure(View.java:12922)
09-01 12:55:54.320: E/AndroidRuntime(4156):  at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4706)
09-01 12:55:54.320: E/AndroidRuntime(4156):  at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1385)
09-01 12:55:54.320: E/AndroidRuntime(4156):  at android.widget.LinearLayout.measureVertical(LinearLayout.java:670)
09-01 12:55:54.320: E/AndroidRuntime(4156):  at android.widget.LinearLayout.onMeasure(LinearLayout.java:563)
09-01 12:55:54.320: E/AndroidRuntime(4156):  at android.view.View.measure(View.java:12922)
09-01 12:55:54.320: E/AndroidRuntime(4156):  at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4706)
09-01 12:55:54.320: E/AndroidRuntime(4156):  at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1385)
09-01 12:55:54.320: E/AndroidRuntime(4156):  at android.widget.LinearLayout.measureVertical(LinearLayout.java:670)
09-01 12:55:54.320: E/AndroidRuntime(4156):  at android.widget.LinearLayout.onMeasure(LinearLayout.java:563)
09-01 12:55:54.320: E/AndroidRuntime(4156):  at android.view.View.measure(View.java:12922)
09-01 12:55:54.320: E/AndroidRuntime(4156):  at android.widget.ListView.measureScrapChild(ListView.java:1181)
09-01 12:55:54.320: E/AndroidRuntime(4156):  at android.widget.ListView.measureHeightOfChildren(ListView.java:1246)
09-01 12:55:54.320: E/AndroidRuntime(4156):  at android.widget.ListView.onMeasure(ListView.java:1155)
09-01 12:55:54.320: E/AndroidRuntime(4156):  at android.view.View.measure(View.java:12922)
09-01 12:55:54.320: E/AndroidRuntime(4156):  at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:594)
09-01 12:55:54.320: E/AndroidRuntime(4156):  at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:376)
09-01 12:55:54.320: E/AndroidRuntime(4156):  at android.view.View.measure(View.java:12922)
09-01 12:55:54.320: E/AndroidRuntime(4156):  at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:594)
09-01 12:55:54.320: E/AndroidRuntime(4156):  at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:376)
09-01 12:55:54.320: E/AndroidRuntime(4156):  at android.view.View.measure(View.java:12922)
09-01 12:55:54.320: E/AndroidRuntime(4156):  at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4706)
09-01 12:55:54.320: E/AndroidRuntime(4156):  at android.widget.FrameLayout.onMeasure(FrameLayout.java:293)
09-01 12:55:54.320: E/AndroidRuntime(4156):  at android.view.View.measure(View.java:12922)
09-01 12:55:54.320: E/AndroidRuntime(4156):  at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1451)
09-01 12:55:54.320: E/AndroidRuntime(4156):  at android.view.View.measure(View.java:12922)
09-01 12:55:54.320: E/AndroidRuntime(4156):  at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4706)
09-01 12:55:54.320: E/AndroidRuntime(4156):  at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1385)
09-01 12:55:54.320: E/AndroidRuntime(4156):  at android.widget.LinearLayout.measureVertical(LinearLayout.java:670)
09-01 12:55:54.320: E/AndroidRuntime(4156):  at android.widget.LinearLayout.onMeasure(LinearLayout.java:563)
09-01 12:55:54.320: E/AndroidRuntime(4156):  at android.view.View.measure(View.java:12922)
09-01 12:55:54.320: E/AndroidRuntime(4156):  at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4706)
09-01 12:55:54.320: E/AndroidRuntime(4156):  at android.widget.FrameLayout.onMeasure(FrameLayout.java:293)
09-01 12:55:54.320: E/AndroidRuntime(4156):  at android.view.View.measure(View.java:12922)
09-01 12:55:54.320: E/AndroidRuntime(4156):  at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4706)
09-01 12:55:54.320: E/AndroidRuntime(4156):  at android.widget.FrameLayout.onMeasure(FrameLayout.java:293)
09-01 12:55:54.320: E/AndroidRuntime(4156):  at android.view.View.measure(View.java:12922)
09-01 12:55:54.320: E/AndroidRuntime(4156):  at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4706)
09-01 12:55:54.320: E/AndroidRuntime(4156):  at android.widget.FrameLayout.onMeasure(FrameLayout.java:293)
09-01 12:55:54.320: E/AndroidRuntime(4156):  at android.view.View.measure(View.java:12922)
09-01 12:55:54.320: E/AndroidRuntime(4156):  at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:594)
09-01 12:55:54.320: E/AndroidRuntime(4156):  at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:376)
09-01 12:55:54.320: E/AndroidRuntime(4156):  at android.view.View.measure(View.java:12922)
09-01 12:55:54.320: E/AndroidRuntime(4156):  at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4706)
09-01 12:55:54.320: E/AndroidRuntime(4156):  at android.widget.FrameLayout.onMeasure(FrameLayout.java:293)
09-01 12:55:54.320: E/AndroidRuntime(4156):  at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2261)
09-01 12:55:54.320: E/AndroidRuntime(4156):  at android.view.View.measure(View.java:12922)
09-01 12:55:54.320: E/AndroidRuntime(4156):  at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1255)
09-01 12:55:54.320: E/AndroidRuntime(4156):  at android.view.ViewRootImpl.handleMessage(ViewRootImpl.java:2649)
09-01 12:55:54.320: E/AndroidRuntime(4156):  at android.os.Handler.dispatchMessage(Handler.java:99)
09-01 12:55:54.320: E/AndroidRuntime(4156):  at android.os.Looper.loop(Looper.java:137)
09-01 12:55:54.320: E/AndroidRuntime(4156):  at android.app.ActivityThread.main(ActivityThread.java:4507)
09-01 12:55:54.320: E/AndroidRuntime(4156):  at java.lang.reflect.Method.invokeNative(Native Method)
09-01 12:55:54.320: E/AndroidRuntime(4156):  at java.lang.reflect.Method.invoke(Method.java:511)
09-01 12:55:54.320: E/AndroidRuntime(4156):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:978)

如堆栈跟踪中所述，AbsListView$LayoutParams 无法转换为 GridLayout$LayoutParams。我不知道为什么会这样？

注意:最奇怪的部分是它只发生在4.0.4 API 15设备中。它在 4.3 和 4.4 中运行良好

更新:(示例代码)

viewHolder.gridLayout1 = (GridLayout) getView().findViewById(R.id.sampleGridLayout);
setLinear(viewHolder);

private void setLinear(ViewHolder viewHolder) {
    viewHolder.gridLayout1.removeAllViews();

    for (int i = 0; i < 3; i++) {
        LinearLayout matchLayout = (LinearLayout) viewHolder.inflater.inflate(R.id.sampleLinear, parent, false);
        //view populations in matchLayout

        viewHolder.gridLayout1.addView(matchLayout);
    }
}

Answer 1

问题是 parent您要传递给 viewHolder.inflater.inflate(); 的 ViewGroup是一个 ListView，而不是一个 GridLayout。

由于您的适配器用于填充 ListView，因此 parent传入getView(int position, View convertView, ViewGroup parent)将是一个 ListView。

当 LayoutInflater 膨胀你的 R.id.sampleLinear布局，它会给出膨胀的布局AbsListView.LayoutParams ，因为您是在告诉充气器您打算将布局放在某种 AbsListView 中。

这将导致您在尝试将该布局放入 GridLayout 中时收到错误消息，这要求所有子项都使用 GridLayout.LayoutParams .

附带说明一下，您应该将布局(以 R.layout.my_layout 的形式)而不是 ID(例如 R.id.my_layout )传递给充气机。我假设这是一个错字，否则你会得到一个完全不同的异常。