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社区首页 >问答首页 >ClassCastException in getGroupView()

问ClassCastException in getGroupView()
EN

Stack Overflow用户
提问于 2014-10-22 17:49:21
回答 1查看 188关注 0票数 0

我使用的是视差卷轴，当项目是文本时，它运行得很好。然后，我希望列表的第0项是一个ImageView，所以我在getGroupView()中添加了一个条件if(groupPosition ==0 )，它按预期工作，然后我想在imageview下面放置一个旋转器，所以我添加了第二个条件if(groupPosition ==1 )，它在滚动期间给了我这个异常。Rest我所有的代码都是一样的

代码语言：javascript
复制
10-22 22:52:23.459: E/InputEventReceiver(31336): Exception dispatching input event.
10-22 22:52:23.469: E/MessageQueue-JNI(31336): Exception in MessageQueue callback: handleReceiveCallback
10-22 22:52:23.499: E/MessageQueue-JNI(31336): java.lang.ClassCastException: android.widget.Spinner cannot be cast to android.widget.TextView
10-22 22:52:23.499: E/MessageQueue-JNI(31336):  at com.vivekwarde.chalisaaartistutisangraha.CustomExpandableListAdapter.getGroupView(CustomExpandableListAdapter.java:150)
10-22 22:52:23.499: E/MessageQueue-JNI(31336):  at android.widget.ExpandableListConnector.getView(ExpandableListConnector.java:446)
10-22 22:52:23.499: E/MessageQueue-JNI(31336):  at android.widget.AbsListView.obtainView(AbsListView.java:2260)
10-22 22:52:23.499: E/MessageQueue-JNI(31336):  at android.widget.ListView.makeAndAddView(ListView.java:1769)
10-22 22:52:23.499: E/MessageQueue-JNI(31336):  at android.widget.ListView.fillDown(ListView.java:672)
10-22 22:52:23.499: E/MessageQueue-JNI(31336):  at android.widget.ListView.fillGap(ListView.java:636)
10-22 22:52:23.499: E/MessageQueue-JNI(31336):  at android.widget.AbsListView.trackMotionScroll(AbsListView.java:5045)
10-22 22:52:23.499: E/MessageQueue-JNI(31336):  at android.widget.AbsListView.scrollIfNeeded(AbsListView.java:3202)
10-22 22:52:23.499: E/MessageQueue-JNI(31336):  at android.widget.AbsListView.onTouchEvent(AbsListView.java:3476)
10-22 22:52:23.499: E/MessageQueue-JNI(31336):  at android.view.View.dispatchTouchEvent(View.java:7127)
10-22 22:52:23.499: E/MessageQueue-JNI(31336):  at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2170)    
10-22 22:52:23.499: E/MessageQueue-JNI(31336):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1905)
10-22 22:52:23.499: E/MessageQueue-JNI(31336):  at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2176)
10-22 22:52:23.499: E/MessageQueue-JNI(31336):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1919)
10-22 22:52:23.499: E/MessageQueue-JNI(31336):  at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2176)
10-22 22:52:23.499: E/MessageQueue-JNI(31336):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1919)
10-22 22:52:23.499: E/MessageQueue-JNI(31336):  at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2176)
10-22 22:52:23.499: E/MessageQueue-JNI(31336):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1919)
10-22 22:52:23.499: E/MessageQueue-JNI(31336):  at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2176)
10-22 22:52:23.499: E/MessageQueue-JNI(31336):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1919)
10-22 22:52:23.499: E/MessageQueue-JNI(31336):  at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2176)
10-22 22:52:23.499: E/MessageQueue-JNI(31336):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1919)
10-22 22:52:23.499: E/MessageQueue-JNI(31336):  at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1934)
10-22 22:52:23.499: E/MessageQueue-JNI(31336):  at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1388)
10-22 22:52:23.499: E/MessageQueue-JNI(31336):  at android.app.Activity.dispatchTouchEvent(Activity.java:2396)
10-22 22:52:23.499: E/MessageQueue-JNI(31336):  at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1882)
10-22 22:52:23.499: E/MessageQueue-JNI(31336):  at android.view.View.dispatchPointerEvent(View.java:7307)
10-22 22:52:23.499: E/MessageQueue-JNI(31336):  at android.view.ViewRootImpl.deliverPointerEvent(ViewRootImpl.java:3174)
10-22 22:52:23.499: E/MessageQueue-JNI(31336):  at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:3119)
10-22 22:52:23.499: E/MessageQueue-JNI(31336):  at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:4157)
10-22 22:52:23.499: E/MessageQueue-JNI(31336):  at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:4136)
10-22 22:52:23.499: E/MessageQueue-JNI(31336):  at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:4228)
10-22 22:52:23.499: E/MessageQueue-JNI(31336):  at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:171)
10-22 22:52:23.499: E/MessageQueue-JNI(31336):  at android.os.MessageQueue.nativePollOnce(Native Method)
10-22 22:52:23.499: E/MessageQueue-JNI(31336):  at android.os.MessageQueue.next(MessageQueue.java:125)
10-22 22:52:23.499: E/MessageQueue-JNI(31336):  at android.os.Looper.loop(Looper.java:124)
10-22 22:52:23.499: E/MessageQueue-JNI(31336):  at android.app.ActivityThread.main(ActivityThread.java:4794)
10-22 22:52:23.499: E/MessageQueue-JNI(31336):  at java.lang.reflect.Method.invokeNative(Native Method)
10-22 22:52:23.499: E/MessageQueue-JNI(31336):  at java.lang.reflect.Method.invoke(Method.java:511)
10-22 22:52:23.499: E/MessageQueue-JNI(31336):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789)
10-22 22:52:23.499: E/MessageQueue-JNI(31336):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:556)
10-22 22:52:23.499: E/MessageQueue-JNI(31336):  at dalvik.system.NativeStart.main(Native Method)
10-22 22:52:23.499: W/dalvikvm(31336): threadid=1: thread exiting with uncaught exception (group=0x40bdf450)
10-22 22:52:23.509: E/AndroidRuntime(31336): FATAL EXCEPTION: main
10-22 22:52:23.509: E/AndroidRuntime(31336): java.lang.ClassCastException: android.widget.Spinner cannot be cast to android.widget.TextView
10-22 22:52:23.509: E/AndroidRuntime(31336):    at com.vivekwarde.chalisaaartistutisangraha.CustomExpandableListAdapter.getGroupView(CustomExpandableListAdapter.java:150)
10-22 22:52:23.509: E/AndroidRuntime(31336):    at android.widget.ExpandableListConnector.getView(ExpandableListConnector.java:446)
10-22 22:52:23.509: E/AndroidRuntime(31336):    at android.widget.AbsListView.obtainView(AbsListView.java:2260)
10-22 22:52:23.509: E/AndroidRuntime(31336):    at android.widget.ListView.makeAndAddView(ListView.java:1769)
10-22 22:52:23.509: E/AndroidRuntime(31336):    at android.widget.ListView.fillDown(ListView.java:672)
10-22 22:52:23.509: E/AndroidRuntime(31336):    at android.widget.ListView.fillGap(ListView.java:636)
10-22 22:52:23.509: E/AndroidRuntime(31336):    at android.widget.AbsListView.trackMotionScroll(AbsListView.java:5045)
10-22 22:52:23.509: E/AndroidRuntime(31336):    at android.widget.AbsListView.scrollIfNeeded(AbsListView.java:3202)
10-22 22:52:23.509: E/AndroidRuntime(31336):    at android.widget.AbsListView.onTouchEvent(AbsListView.java:3476)
10-22 22:52:23.509: E/AndroidRuntime(31336):    at android.view.View.dispatchTouchEvent(View.java:7127)
10-22 22:52:23.509: E/AndroidRuntime(31336):    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2170)
10-22 22:52:23.509: E/AndroidRuntime(31336):    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1905)
10-22 22:52:23.509: E/AndroidRuntime(31336):    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2176)
10-22 22:52:23.509: E/AndroidRuntime(31336):    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1919)
10-22 22:52:23.509: E/AndroidRuntime(31336):    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2176)
10-22 22:52:23.509: E/AndroidRuntime(31336):    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1919)
10-22 22:52:23.509: E/AndroidRuntime(31336):    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2176)
10-22 22:52:23.509: E/AndroidRuntime(31336):    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1919)
10-22 22:52:23.509: E/AndroidRuntime(31336):    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2176)
10-22 22:52:23.509: E/AndroidRuntime(31336):    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1919)
10-22 22:52:23.509: E/AndroidRuntime(31336):    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2176)
10-22 22:52:23.509: E/AndroidRuntime(31336):    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1919)
10-22 22:52:23.509: E/AndroidRuntime(31336):    at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1934)
10-22 22:52:23.509: E/AndroidRuntime(31336):    at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1388)
10-22 22:52:23.509: E/AndroidRuntime(31336):    at android.app.Activity.dispatchTouchEvent(Activity.java:2396)
10-22 22:52:23.509: E/AndroidRuntime(31336):    at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1882)
10-22 22:52:23.509: E/AndroidRuntime(31336):    at android.view.View.dispatchPointerEvent(View.java:7307)
10-22 22:52:23.509: E/AndroidRuntime(31336):    at android.view.ViewRootImpl.deliverPointerEvent(ViewRootImpl.java:3174)
10-22 22:52:23.509: E/AndroidRuntime(31336):    at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:3119)
10-22 22:52:23.509: E/AndroidRuntime(31336):    at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:4157)
10-22 22:52:23.509: E/AndroidRuntime(31336):    at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:4136)
10-22 22:52:23.509: E/AndroidRuntime(31336):    at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:4228)
10-22 22:52:23.509: E/AndroidRuntime(31336):    at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:171)
10-22 22:52:23.509: E/AndroidRuntime(31336):    at android.os.MessageQueue.nativePollOnce(Native Method)
10-22 22:52:23.509: E/AndroidRuntime(31336):    at android.os.MessageQueue.next(MessageQueue.java:125)
10-22 22:52:23.509: E/AndroidRuntime(31336):    at android.os.Looper.loop(Looper.java:124)
10-22 22:52:23.509: E/AndroidRuntime(31336):    at android.app.ActivityThread.main(ActivityThread.java:4794)
10-22 22:52:23.509: E/AndroidRuntime(31336):    at java.lang.reflect.Method.invokeNative(Native Method)
10-22 22:52:23.509: E/AndroidRuntime(31336):    at java.lang.reflect.Method.invoke(Method.java:511)
10-22 22:52:23.509: E/AndroidRuntime(31336):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789)
10-22 22:52:23.509: E/AndroidRuntime(31336):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:556)
10-22 22:52:23.509: E/AndroidRuntime(31336):    at dalvik.system.NativeStart.main(Native Method)

这是代码，我不知道是什么引起了问题

代码语言：javascript
复制
@Override
public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {


    if(groupPosition ==0 )
    {       ImageView imageView = (ImageView) convertView;
        if (imageView == null)
            imageView = (ImageView) inflater.inflate(R.layout.image_big, null);
        //imageView.setImageDrawable();
        return imageView;
    }
    if(groupPosition==1)
    {
        Spinner spinner = (Spinner) convertView;
            if (spinner == null)
                spinner = (Spinner) inflater.inflate(R.layout.spinner, null);
            //imageView.setImageDrawable();
            List<String> list = new ArrayList<String>();
            list.add("Android");
            list.add("Java");
            list.add("Spinner Data");
            list.add("Spinner Adapter");
            list.add("Spinner Example");

            ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>
                         (myContext, android.R.layout.simple_spinner_item,list);

            dataAdapter.setDropDownViewResource
                         (android.R.layout.simple_spinner_dropdown_item);

            spinner.setAdapter(dataAdapter);

            return spinner;

    }
    else
    {
    TextView textView = (TextView) convertView;// line 150 : exception after scrolling when spinner view is gone

    if (textView == null)
        textView = (TextView) inflater.inflate(R.layout.item, null);
    textView.setText(getGroup(groupPosition));
    return textView;
    }
}

Spinner.xml

代码语言：javascript
复制
<?xml version="1.0" encoding="utf-8"?>
<Spinner xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/spinner1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:prompt="@string/spinner_prompt" >


</Spinner>

我从最后一个小时开始尝试，但不知道如何解决它。

救命!！

提前谢谢..。

android
classcastexception
EN

回答 1

Stack Overflow用户

发布于 2014-10-22 17:55:49

代码语言：javascript
复制
java.lang.ClassCastException: android.widget.Spinner cannot be cast to android.widget.TextView

问题在于，您正在将convertView转换为TextView!，您的Spinner.xml中没有任何TextView。

代码语言：javascript
复制
 TextView textView = (TextView) convertView;// line 150 : exception after scrolling when spinner view is gone
票数 0
EN
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：

https://stackoverflow.com/questions/26513833

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