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。不知道为什么会出现这种情况?
注意:最奇怪的部分是它仅发生在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);
}
}
最佳答案
问题是parent
您传递给 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,parent
传入getView(int position, View convertView, ViewGroup parent)
将是一个ListView。
当 LayoutInflater 膨胀你的 R.id.sampleLinear
时布局,它将给出膨胀的布局 AbsListView.LayoutParams
,因为您告诉充气器您打算将布局放入某种 AbsListView 中。
当您尝试将该布局放入 GridLayout 中时,这将导致您收到错误,这要求所有子级使用 GridLayout.LayoutParams
.
顺便说一句,您应该将布局(以 R.layout.my_layout
的形式)而不是 ID(例如 R.id.my_layout
)传递给您的充气机。我假设这是一个拼写错误,因为否则你会得到一个完全不同的异常。
关于android - ClassCastException android.widget.AbsListView$LayoutParams 到 android.widget.GridLayout$LayoutParams 此异常是否特定于 API 级别?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/25666274/