Question

我收到错误TextView无法转换为android.widget.Spinner，我不确定我哪里出错了。我是新来的。我在这里添加我的java.class文件和log cat。有人可以帮我吗？

public class ListDataAdapter extends ArrayAdapter {
List list = new ArrayList();

public ListDataAdapter(@NonNull Context context, int resource) {
    super(context, resource);
}

static class LayoutHandler{
    TextView NAME,PRICE,DESCRIPTION;
    Spinner CATEGORY;
}

@Override
public void add(@Nullable Object object) {
    super.add(object);
    list.add(object);
}

@Override
public int getCount() {
    return list.size();

}

@Nullable
@Override
public Object getItem(int position) {
    return list.get(position);
}

@NonNull
@Override
public View getView(int position, @Nullable View convertView, @NonNull ViewGroup parent) {
    View row = convertView;
    LayoutHandler layoutHandler;
    if(row == null)
    {
        LayoutInflater layoutInflater = (LayoutInflater) this.getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        row = layoutInflater.inflate(R.layout.row_layout,parent,false);
        layoutHandler = new LayoutHandler();
        layoutHandler.NAME = (TextView)row.findViewById(R.id.text_flower_name);
        layoutHandler.PRICE = (TextView)row.findViewById(R.id.text_flower_price);
        layoutHandler.DESCRIPTION = (TextView)row.findViewById(R.id.text_flower_description);
        layoutHandler.CATEGORY = (Spinner)row.findViewById(R.id.text_flower_category);
        row.setTag(layoutHandler);

    }else
    {
        layoutHandler = (LayoutHandler) row.getTag();


    }
    DataProvider dataProvider = (DataProvider)this.getItem(position);
    layoutHandler.NAME.setText(dataProvider.getName());
    layoutHandler.PRICE.setText(dataProvider.getPrice());
    layoutHandler.DESCRIPTION.setText(dataProvider.getDescription());
    layoutHandler.CATEGORY.setSelection(0);
    return row;
}

}

这是我的Log cat错误。

--------- beginning of crash
09-02 21：01：52.368 24696-24696 / com.example.www.shop E / AndroidRuntime：FATAL EXCEPTION：main 流程：com.example.www.shop，PID：24696 java.lang.ClassCastException：android.widget.TextView无法转换为android.widget.Spinner 在com.example.www.shop.ListDataAdapter.getView（ListDataAdapter.java:59）在android.widget.AbsListView.obtainView（AbsListView.java:2378）在android.widget.ListView.makeAndAddView（ListView.java:1977）在android.widget.ListView.fillDown（ListView.java:711）在android.widget.ListView.fillFromTop（ListView.java:772）在android.widget.ListView.layoutChildren（ListView.java:1723）在android.widget.AbsListView.onLayout（AbsListView.java:2170）在android.view.View.layout（View.java:17707）在android.view.ViewGroup.layout（ViewGroup.java:5588）在android.support.constraint.ConstraintLayout.onLayout（ConstraintLayout.java:1858）在android.view.View.layout（View.java:17707）在android.view.ViewGroup.layout（ViewGroup.java:5588）在android.widget.FrameLayout.layoutChildren（FrameLayout.java:323）在android.widget.FrameLayout.onLayout（FrameLayout.java:261）在android.view.View.layout（View.java:17707）在android.view.ViewGroup.layout（ViewGroup.java:5588）在android.support.v7.widget.ActionBarOverlayLayout.onLayout（ActionBarOverlayLayout.java:444）在android.view.View.layout（View.java:17707）在android.view.ViewGroup.layout（ViewGroup.java:5588）在android.widget.FrameLayout.layoutChildren（FrameLayout.java:323）在android.widget.FrameLayout.onLayout（FrameLayout.java:261）在android.view.View.layout（View.java:17707）在android.view.ViewGroup.layout（ViewGroup.java:5588）在android.widget.LinearLayout.setChildFrame（LinearLayout.java:1741）在android.widget.LinearLayout.layoutVertical（LinearLayout.java:1585）在android.widget.LinearLayout.onLayout（LinearLayout.java:1494）在android.view.View.layout（View.java:17707）在android.view.ViewGroup.layout（ViewGroup.java:5588）在android.widget.FrameLayout.layoutChildren（FrameLayout.java:323）在android.widget.FrameLayout.onLayout（FrameLayout.java:261）在com.android.internal.policy.DecorView.onLayout（DecorView.java:727）在android.view.View.layout（View.java:17707）在android.view.ViewGroup.layout（ViewGroup.java:5588）在android.view.ViewRootImpl.performLayout（ViewRootImpl.java:2346）在android.view.ViewRootImpl.performTraversals（ViewRootImpl.java:2068）在android.view.ViewRootImpl.doTraversal（ViewRootImpl.java:1254）在android.view.ViewRootImpl $ TraversalRunnable.run（ViewRootImpl.java:6353）在android.view.Choreographer $ CallbackRecord.run（Choreographer.java:874）在android.view.Choreographer.doCallbacks（Choreographer.java:686）在android.view.Choreographer.doFrame（Choreographer.java:621）在android.view.Choreographer $ FrameDisplayEventReceiver.run（Choreographer.java:860）在android.os.Handler.handleCallback（Handler.java:751）在android.os.Handler.dispatchMessage（Handler.java:95）在android.os.Looper.loop（Looper.java:154）在android.app.ActivityThread.main（ActivityThread.java:6121）在java.lang.reflect.Method.invoke（本机方法）在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:889）在com.android.internal.os.ZygoteInit.main（ZygoteInit.java:779）

Answer 1

R.id.text_flower_category是TextView，而不是Spinner

错误TextView无法转换为android.widget.Spinner

1 个答案: