Question

这是我的logcat

08-05 09:05:59.833  24812-24812/com.Pi110.KGHS E/AndroidRuntime﹕ FATAL EXCEPTION: main
java.lang.ClassCastException: android.widget.RelativeLayout$LayoutParams cannot be cast to android.widget.AbsListView$LayoutParams
        at android.widget.ListView.measureScrapChild(ListView.java:1163)
        at android.widget.ListView.measureHeightOfChildren(ListView.java:1246)
        at android.widget.ListView.onMeasure(ListView.java:1155)
        at android.view.View.measure(View.java:12752)
        at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:594)
        at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:376)
        at android.view.View.measure(View.java:12752)
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4698)
        at android.widget.FrameLayout.onMeasure(FrameLayout.java:293)
        at android.view.View.measure(View.java:12752)
        at android.support.v4.widget.DrawerLayout.onMeasure(DrawerLayout.java:868)
        at android.view.View.measure(View.java:12752)
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4698)
        at android.widget.FrameLayout.onMeasure(FrameLayout.java:293)
        at android.view.View.measure(View.java:12752)
        at android.widget.LinearLayout.measureVertical(LinearLayout.java:812)
        at android.widget.LinearLayout.onMeasure(LinearLayout.java:553)
        at android.view.View.measure(View.java:12752)
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4698)
        at android.widget.FrameLayout.onMeasure(FrameLayout.java:293)
        at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2267)
        at android.view.View.measure(View.java:12752)
        at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1074)
        at android.view.ViewRootImpl.handleMessage(ViewRootImpl.java:2462)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loop(Looper.java:137)
        at android.app.ActivityThread.main(ActivityThread.java:4558)

        at java.lang.reflect.Method.invokeNative(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:511)
        at  com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
        at dalvik.system.NativeStart.main(Native Method)

我甚至没有在我的布局中使用listview，所以我不知道我在哪里得到这个错误。任何帮助都会很棒。它并没有出现在api 22中，但到目前为止在旧的Android版本中都没有。

我添加此代码后似乎已经发生了。

 @Override
  public View getView(int position, View convertView, ViewGroup parent) {
    ViewHolder holder;
  LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
  convertView = inflater.inflate(R.layout.rss_item, parent, false);
  holder = new ViewHolder();
     if ((position % k) == 0) {
            if (convertView instanceof AdView) {
                return convertView;
            } else {


                holder.mAdView = (AdView) convertView.findViewById(R.id.adView);


                return holder.mAdView;
            }}
        else {
         convertView = inflater.inflate(R.layout.rss_item, parent, false);
            holder.itemTitle = (TextView) convertView.findViewById(R.id.textView);
            convertView.setTag(holder);
            Typeface face = Typeface.createFromAsset(context.getAssets(), "font/Roboto-Regular.ttf");
            holder.itemTitle.setTypeface(face);
            holder.itemTitle1 = (TextView) convertView.findViewById(R.id.textView1);
            convertView.setTag(holder);
            holder.itemTitle2 = (TextView) convertView.findViewById(R.id.textView2);
            convertView.setTag(holder);
            Typeface face1 = Typeface.createFromAsset(context.getAssets(), "font/Roboto-Thin.ttf");
            holder.itemTitle1.setTypeface(face1);
         holder.itemTitle2.setVisibility(View.GONE);
            holder.image = (ImageView) convertView.findViewById(R.id.icon);
            convertView.setTag(holder);

    }
  EventItem item = itemList.get(position);
    holder.itemTitle.setText(item.getTitle());

   holder.itemTitle1.setText(item.getDate());
  holder.itemTitle2.setText(item.getCategories());
  if (item.getIcon()!= 1){
  holder.image.setImageResource(item.getIcon());}
  return convertView;
}

这是布局

xmlns:ads="http://schemas.android.com/apk/res-auto"
android:id= "@+id/layout"
android:background= "@drawable/transition"
android:padding="8dp"
>
<com.google.android.gms.ads.AdView
    android:id="@+id/adView"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_centerHorizontal="true"
    android:layout_alignParentBottom="true"
    ads:adSize="BANNER"
    ads:adUnitId="@string/banner_ad_unit_id">
</com.google.android.gms.ads.AdView>

<TextView
   android:id="@+id/textView"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:textSize="20sp"
   android:ellipsize="end"
   android:layout_centerHorizontal="true"
   android:singleLine="true"
   android:layout_below="@+id/icon"
   android:textColor="#ff000000"
   android:paddingTop="5dp"
   android:paddingBottom="5dp"/>

<TextView
    android:id="@+id/textView1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_below="@+id/textView"
    android:textSize="20sp"
    android:textColor="#ff8d8d8d"
    android:paddingRight= "10dp"
    android:paddingTop="5dp"
    android:layout_centerHorizontal="true"
    android:paddingBottom="5dp"/>
<TextView
    android:id="@+id/textView2"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_below="@id/textView"
    android:textColor="#ff8d8d8d"
    android:textSize="20sp"
    android:paddingRight= "10dp"
    android:paddingLeft="10dp"
    android:paddingTop="5dp"
    android:paddingBottom="5dp"/>

<ImageView
    android:id="@+id/icon"
    android:layout_width="100dp"
    android:layout_height="100dp"
    android:layout_centerHorizontal="true"
    android:layout_alignParentTop="true"
    android:background="@drawable/customicon"/>

是的，错误就在那里。除了convertView return语句之外我基本上删除了所有行，它很好吗？!!!!! ??????

我的代码似乎很好......我会再次尝试清理它。感谢所有人。

Answer 1

替换getView（）方法的第一行：

convertView = View.inflate(context, R.layout.rss_item, null);

要

LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    convertView = inflater.inflate(R.layout.rss_item, parent, false);

问题是列表视图假设getView（）方法将返回属于AbsListView父视图的视图。但是您的代码返回的视图的父级是“RelativeLayout”。

ClassCastException不知道

1 个答案: