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谁能告诉我这个 logcat 的要求是什么？

建议请。

感谢您宝贵的时间！..

站适配器

public class StationAdapter extends ArrayAdapter<Stations> {

Context context;
List<Stations> originalList;
List<Stations> temp;
private StationFilter filter;

public StationAdapter(Context context, int textViewResourceId,
        List<Stations> objects) {
    super(context, textViewResourceId, objects);
    this.context = context ; 

    this.originalList = new ArrayList<Stations>();
    this.originalList.addAll(objects);

    this.temp = new ArrayList<Stations>();
    this.temp.addAll(objects);
}

@Override
public Filter getFilter() {
    if (filter == null){
        filter  = new StationFilter();
    }
    return filter;
}

private class ViewHolder {
    TextView name;
}

@Override
public View getView(final int position, View convertView, ViewGroup parent) {
    // TODO Auto-generated method stub
    ViewHolder holder = null;

    if (convertView == null) {

        LayoutInflater inflater = (LayoutInflater) context
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        convertView = inflater.inflate(R.layout.station_child, null);




        holder = new ViewHolder();
        holder.name = (TextView) convertView.findViewById(R.id.textView_single_item);

        convertView.setTag(holder);
    } 
    else
    {
        holder = (ViewHolder) convertView.getTag();
    }
    Stations stations =originalList.get(position);
    holder.name.setText(stations.station_name);

    convertView.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            tab_detailsActivity.weatherData=null;
            System.out.println("adap  "+ originalList.get(position).station_name+" "+originalList.get(position).station_code);
            Stations station=originalList.get(position);
            if(station.isCamera){
                Intent intent =new Intent(context,TabhostActivity.class);
                intent.putExtra("station_code", station.station_code);
                intent.putExtra("station_name", station.station_name);
                intent.putExtra("isCamera", "YES");
                context.startActivity(intent);
            }else{
                Intent txt_det_intent = new Intent(context, tab_detailsActivity.class);
                txt_det_intent.putExtra("station_code", station.station_code);
                txt_det_intent.putExtra("station_name", station.station_name);
                txt_det_intent.putExtra("isCamera", "NO");
                context.startActivity(txt_det_intent);
            }
        }
    });
    return convertView;
}

private class StationFilter extends Filter
{

    @Override
    protected FilterResults performFiltering(CharSequence constraint) {

        constraint = constraint.toString().toLowerCase();
        FilterResults result = new FilterResults();
        if(constraint != null && constraint.toString().length() > 0)
        {
            ArrayList<Stations> filteredItems = new ArrayList<Stations>();

            for(int i = 0, l = temp.size(); i < l; i++)
            {
                Stations stations= temp.get(i);
                if(stations.station_name.toString().toLowerCase().startsWith(constraint.toString()))
                    filteredItems.add(stations);
            }
            result.count = filteredItems.size();
            result.values = filteredItems;
        }
        else
        {
            synchronized(this)
            {
                result.values = temp;
                result.count = temp.size();
            }
        }
        return result;
    }

    @SuppressWarnings("unchecked")
    @Override
    protected void publishResults(CharSequence constraint, 
            FilterResults results) {

        originalList = (ArrayList<Stations>)results.values;
        notifyDataSetChanged();
        clear();
        for(int i = 0, l = originalList.size(); i < l; i++)
            add(originalList.get(i));
        notifyDataSetInvalidated();
    }
}}





**Logcat**
06-07 16:44:46.850: E/AndroidRuntime(21145): FATAL EXCEPTION: main
06-07 16:44:46.850: E/AndroidRuntime(21145): java.lang.NullPointerException
06-07 16:44:46.850: E/AndroidRuntime(21145):    at org.twinkle.weather.StationAdapter.getView(StationAdapter.java:70)
06-07 16:44:46.850: E/AndroidRuntime(21145):    at android.widget.AbsListView.obtainView(AbsListView.java:2472)
06-07 16:44:46.850: E/AndroidRuntime(21145):    at android.widget.ListView.makeAndAddView(ListView.java:1775)
06-07 16:44:46.850: E/AndroidRuntime(21145):    at android.widget.ListView.fillDown(ListView.java:678)
06-07 16:44:46.850: E/AndroidRuntime(21145):    at android.widget.ListView.fillFromTop(ListView.java:739)
06-07 16:44:46.850: E/AndroidRuntime(21145):    at android.widget.ListView.layoutChildren(ListView.java:1628)
06-07 16:44:46.850: E/AndroidRuntime(21145):    at android.widget.AbsListView.onLayout(AbsListView.java:2307)
06-07 16:44:46.850: E/AndroidRuntime(21145):    at android.view.View.layout(View.java:14072)
06-07 16:44:46.850: E/AndroidRuntime(21145):    at android.view.ViewGroup.layout(ViewGroup.java:4657)
06-07 16:44:46.850: E/AndroidRuntime(21145):    at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1655)
06-07 16:44:46.850: E/AndroidRuntime(21145):    at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1513)
06-07 16:44:46.850: E/AndroidRuntime(21145):    at android.widget.LinearLayout.onLayout(LinearLayout.java:1426)
06-07 16:44:46.850: E/AndroidRuntime(21145):    at android.view.View.layout(View.java:14072)
06-07 16:44:46.850: E/AndroidRuntime(21145):    at android.view.ViewGroup.layout(ViewGroup.java:4657)
06-07 16:44:46.850: E/AndroidRuntime(21145):    at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1655)
06-07 16:44:46.850: E/AndroidRuntime(21145):    at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1513)
06-07 16:44:46.850: E/AndroidRuntime(21145):    at android.widget.LinearLayout.onLayout(LinearLayout.java:1426)
06-07 16:44:46.850: E/AndroidRuntime(21145):    at android.view.View.layout(View.java:14072)
06-07 16:44:46.850: E/AndroidRuntime(21145):    at android.view.ViewGroup.layout(ViewGroup.java:4657)
06-07 16:44:46.850: E/AndroidRuntime(21145):    at android.widget.FrameLayout.onLayout(FrameLayout.java:448)
06-07 16:44:46.850: E/AndroidRuntime(21145):    at android.view.View.layout(View.java:14072)
06-07 16:44:46.850: E/AndroidRuntime(21145):    at android.view.ViewGroup.layout(ViewGroup.java:4657)
06-07 16:44:46.850: E/AndroidRuntime(21145):    at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1655)
06-07 16:44:46.850: E/AndroidRuntime(21145):    at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1513)
06-07 16:44:46.850: E/AndroidRuntime(21145):    at android.widget.LinearLayout.onLayout(LinearLayout.java:1426)
06-07 16:44:46.850: E/AndroidRuntime(21145):    at android.view.View.layout(View.java:14072)
06-07 16:44:46.850: E/AndroidRuntime(21145):    at android.view.ViewGroup.layout(ViewGroup.java:4657)
06-07 16:44:46.850: E/AndroidRuntime(21145):    at android.widget.FrameLayout.onLayout(FrameLayout.java:448)
06-07 16:44:46.850: E/AndroidRuntime(21145):    at android.view.View.layout(View.java:14072)
06-07 16:44:46.850: E/AndroidRuntime(21145):    at android.view.ViewGroup.layout(ViewGroup.java:4657)
06-07 16:44:46.850: E/AndroidRuntime(21145):    at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2004)
06-07 16:44:46.850: E/AndroidRuntime(21145):    at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1825)
06-07 16:44:46.850: E/AndroidRuntime(21145):    at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1120)
06-07 16:44:46.850: E/AndroidRuntime(21145):    at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:4604)
06-07 16:44:46.850: E/AndroidRuntime(21145):    at android.view.Choreographer$CallbackRecord.run(Choreographer.java:725)
06-07 16:44:46.850: E/AndroidRuntime(21145):    at android.view.Choreographer.doCallbacks(Choreographer.java:555)
06-07 16:44:46.850: E/AndroidRuntime(21145):    at android.view.Choreographer.doFrame(Choreographer.java:525)
06-07 16:44:46.850: E/AndroidRuntime(21145):    at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:711)
06-07 16:44:46.850: E/AndroidRuntime(21145):    at android.os.Handler.handleCallback(Handler.java:615)
06-07 16:44:46.850: E/AndroidRuntime(21145):    at android.os.Handler.dispatchMessage(Handler.java:92)
06-07 16:44:46.850: E/AndroidRuntime(21145):    at android.os.Looper.loop(Looper.java:137)
06-07 16:44:46.850: E/AndroidRuntime(21145):    at android.app.ActivityThread.main(ActivityThread.java:4921)
06-07 16:44:46.850: E/AndroidRuntime(21145):    at java.lang.reflect.Method.invokeNative(Native Method)
06-07 16:44:46.850: E/AndroidRuntime(21145):    at java.lang.reflect.Method.invoke(Method.java:511)
06-07 16:44:46.850: E/AndroidRuntime(21145):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1038)
06-07 16:44:46.850: E/AndroidRuntime(21145):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:805)
06-07 16:44:46.850: E/AndroidRuntime(21145):    at dalvik.system.NativeStart.main(Native Method)
4

2 回答 2

0

我有两个疑问

1) stations.station_nameinholder.name.setText(stations.station_name);没有任何价值。请检查“station_name”是否已初始化？
2) holder.name可能为空。检查您何时分配convertView.findViewById(R.id.textView_single_item);，textview_single_item是否存在于您的布局中。

于 2013-06-07T11:32:41.523 回答
0

你得到一个java.lang.NullPointerException

更改此行

convertView = inflater.inflate(R.layout.station_child, null);

对此

convertView =  inflater.inflate(R.layout.station_child, parent, false);
于 2013-06-07T11:34:25.373 回答