Question

我创建了两个扩展Meal的类（Restaurant，ParseObject），并创建了2个自定义适配器（BottomFragmentMealAdapter，RestaurantAdapter）。我试图在BottomFragmentMealAdapter（{1}}中为RestaurantAdapter做任何事情。但它没有用。
这是我的日志：

致命的例外：主要过程：com.bogazici.menumizer，PID：14739 java.lang.ClassCastException：com.parse.ParseObject无法强制转换为com.bogazici.menumizer.Restaurant 在com.bogazici.menumizer.RestaurantAdapter.getItemView（RestaurantAdapter.java:17）在com.parse.ParseQueryAdapter.getView（ParseQueryAdapter.java:547）在android.widget.AbsListView.obtainView（AbsListView.java:2347）在android.widget.ListView.makeAndAddView（ListView.java:1864）在android.widget.ListView.fillDown（ListView.java:698）在android.widget.ListView.fillFromTop（ListView.java:759）在android.widget.ListView.layoutChildren（ListView.java:1659）在android.widget.AbsListView.onLayout（AbsListView.java:2151）在android.view.View.layout（View.java:15671）在android.view.ViewGroup.layout（ViewGroup.java:5038）在android.support.v4.widget.SwipeRefreshLayout.onLayout（SwipeRefreshLayout.java:581）在android.view.View.layout（View.java:15671）在android.view.ViewGroup.layout（ViewGroup.java:5038）在android.support.v4.view.ViewPager.onLayout（ViewPager.java:1627）在android.view.View.layout（View.java:15671）在android.view.ViewGroup.layout（ViewGroup.java:5038）在android.support.design.widget.CoordinatorLayout.layoutChild（CoordinatorLayout.java:1034）在android.support.design.widget.CoordinatorLayout.onLayoutChild（CoordinatorLayout.java:744）在android.support.design.widget.ViewOffsetBehavior.onLayoutChild（ViewOffsetBehavior.java:42）在android.support.design.widget.AppBarLayout $ ScrollingViewBehavior.onLayoutChild（AppBarLayout.java:1180）在android.support.design.widget.CoordinatorLayout.onLayout（CoordinatorLayout.java:757）在android.view.View.layout（View.java:15671）在android.view.ViewGroup.layout（ViewGroup.java:5038）在android.widget.FrameLayout.layoutChildren（FrameLayout.java:579）在android.widget.FrameLayout.onLayout（FrameLayout.java:514）在android.view.View.layout（View.java:15671）在android.view.ViewGroup.layout（ViewGroup.java:5038）在android.widget.LinearLayout.setChildFrame（LinearLayout.java:1703）在android.widget.LinearLayout.layoutVertical（LinearLayout.java:1557）在android.widget.LinearLayout.onLayout（LinearLayout.java:1466）在android.view.View.layout（View.java:15671）在android.view.ViewGroup.layout（ViewGroup.java:5038）在android.widget.FrameLayout.layoutChildren（FrameLayout.java:579）在android.widget.FrameLayout.onLayout（FrameLayout.java:514）在android.view.View.layout（View.java:15671）在android.view.ViewGroup.layout（ViewGroup.java:5038）在android.widget.LinearLayout.setChildFrame（LinearLayout.java:1703）在android.widget.LinearLayout.layoutVertical（LinearLayout.java:1557）在android.widget.LinearLayout.onLayout（LinearLayout.java:1466）在android.view.View.layout（View.java:15671）在android.view.ViewGroup.layout（ViewGroup.java:5038）在android.widget.FrameLayout.layoutChildren（FrameLayout.java:579）在android.widget.FrameLayout.onLayout（FrameLayout.java:514）在android.view.View.layout（View.java:15671）在android.view.ViewGroup.layout（ViewGroup.java:5038）在android.view.ViewRootImpl.performLayout（ViewRootImpl.java:2086）在android.view.ViewRootImpl.performTraversals（ViewRootImpl.java:1843）在android.view.ViewRootImpl.doTraversal（ViewRootImpl.java:1061）在android.view.ViewRootImpl $ TraversalRunnable.run（ViewRootImpl.java:5885）在android.view.Choreographer $ CallbackRecord.run（Choreographer.java:767）在android.view.Choreographer.doCallbacks（Choreographer.java:580）在android.view.Choreographer.doFrame（Choreographer.java:550）在android.view.Choreographer $ FrameDisplayEventReceiver.run（Choreographer.java:753）在android.os.Handler.handleCallback（Handler.java:739）在android.os.Handler.dispatchMessage（Handler.java:95）在android.os.Looper.loop（Looper.java:135）在android.app.ActivityThread.main（ActivityThread.java:5257） at java.lang.reflect.Method.invoke（Native Method）在java.lang.reflect.Method.invoke（Method.java:372）在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:903）在com.android.internal.os.ZygoteInit.main（Zyg

这是我的RestaurantAdapter

public class RestaurantAdapter extends ParseQueryAdapter<Restaurant> {
    //top line is 17
    private AlphaAnimation buttonClick;
    public RestaurantAdapter(Context context, final String filter_edit, final String filter_city, final String filter_region,0 final int filter_sort) {
       super(context, new ParseQueryAdapter.QueryFactory<Restaurant>() {
           public ParseQuery<Restaurant> create() {
               // Here we can configure a ParseQuery to display
               // only top-rated meals.
               ParseQuery query = new ParseQuery("Restaurant");
               query.whereContains("city", filter_city);       
    if(!filter_region.equals("*Hepsi*")&&!filter_region.equals("*All*"))
                   query.whereContains("region",filter_region);
               if(filter_edit.equals("nothing")){
               }else{
                   query.whereStartsWith("restaurant", filter_edit);
               }
               switch(filter_sort){
                   case 0:
                       query.orderByAscending("averagePrice");
                       break;
                   case 1:
                       query.orderByDescending("averagePrice");
                       break;
                   case 2:
                       query.orderByAscending("restaurant");
                       break;
                   case 3:
                       query.orderByDescending("averagePoint");
                       break;
                   default:
                       query.orderByAscending("restaurant");
                       break;
               }
               return query;
           }
       });
    }
    @Override
    public View getItemView(Restaurant restaurant, View v, ViewGroup parent) {
        //buttonClick = new AlphaAnimation(1F, 0.8F);
        if (v == null) {
            v = View.inflate(getContext(), R.layout.restaurant_list_item, null);
        }
        super.getItemView(restaurant, v, parent);
        final String str_call = restaurant.getPhone();
        TextView locationTextView = (TextView) v.findViewById(R.id.restaurant_location);
        String str_location= restaurant.getRegion()+", "+restaurant.getCity();
        locationTextView.setText(str_location);
        TextView nameTextView = (TextView) v.findViewById(R.id.restaurant_name);
        nameTextView.setText(restaurant.getName());
        TextView pointTextView = (TextView) v.findViewById(R.id.restaurant_point);
        String str_point = String.valueOf(restaurant.getAveragePoint());
        pointTextView.setText(str_point);
        TextView priceTextView = (TextView) v.findViewById(R.id.restaurant_averageprice);
        String str_price = String.valueOf(restaurant.getAveragePrice())+" TL";
        priceTextView.setText(str_price);
        ImageView callImage = (ImageView) v.findViewById(R.id.restaurant_call);
        callImage.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View w) {
                // w.startAnimation(buttonClick);
                Intent intent = new Intent(Intent.ACTION_DIAL);
                intent.setData(Uri.parse("tel:"+str_call));
                w.getContext().startActivity(intent);
            }
        });
        TextView mapText = (TextView) v.findViewById(R.id.restaurant_map);
        mapText.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View w) {
                //w.startAnimation(buttonClick);
            }
        });
        return v;
    }
}

Answer 1

你必须检查两件事

确保您的子类具有public default（即零参数）构造函数。您不得修改此构造函数中的任何ParseObject字段。以及
在调用ParseObject.registerSubclass(YourClass.class)之前，在Application构造函数中调用Parse.initialize()。

Answer 2

确保在您的应用程序中注册了您的解析类

Answer 3

我认为ParseQueryAdapter需要ParseObject作为Generics和＆＃39; Restaurant＆＃39; class不是ParseObject类型

Answer 4

将您的Adapter's getItemView()方法更改为 -

 @Override
    public View getItemView(ParseObject parseObject, View v, ViewGroup parent) {
}

java.lang.ClassCastException：com.parse.ParseObject无法强制转换为

4 个答案: