有时候列表视图的viewTypeCount <1错误

Question

我正进入(状态

IllegalArgumentException:不能有viewTypeCount <1

对于我的列表视图有时候.我知道这是为了list.size().但这并不经常发生,只有一些我得到这个错误和应用程序崩溃.我还没有得到解决方案,有没有人知道这个？

更新:这是我得到的

10-17 05:34:49.103: ERROR/AndroidRuntime(1683): FATAL EXCEPTION: main
10-17 05:34:49.103: ERROR/AndroidRuntime(1683): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.racontrs/com.racontrs.Racontours.City}: java.lang.IllegalArgumentException: Can't have a viewTypeCount < 1
10-17 05:34:49.103: ERROR/AndroidRuntime(1683):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1647)
10-17 05:34:49.103: ERROR/AndroidRuntime(1683):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
10-17 05:34:49.103: ERROR/AndroidRuntime(1683):     at android.app.ActivityThread.access$1500(ActivityThread.java:117)
10-17 05:34:49.103: ERROR/AndroidRuntime(1683):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
10-17 05:34:49.103: ERROR/AndroidRuntime(1683):     at android.os.Handler.dispatchMessage(Handler.java:99)
10-17 05:34:49.103: ERROR/AndroidRuntime(1683):     at android.os.Looper.loop(Looper.java:130)
10-17 05:34:49.103: ERROR/AndroidRuntime(1683):     at android.app.ActivityThread.main(ActivityThread.java:3683)
10-17 05:34:49.103: ERROR/AndroidRuntime(1683):     at java.lang.reflect.Method.invokeNative(Native Method)
10-17 05:34:49.103: ERROR/AndroidRuntime(1683):     at java.lang.reflect.Method.invoke(Method.java:507)
10-17 05:34:49.103: ERROR/AndroidRuntime(1683):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
10-17 05:34:49.103: ERROR/AndroidRuntime(1683):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
10-17 05:34:49.103: ERROR/AndroidRuntime(1683):     at dalvik.system.NativeStart.main(Native Method)
10-17 05:34:49.103: ERROR/AndroidRuntime(1683): Caused by: java.lang.IllegalArgumentException: Can't have a viewTypeCount < 1
10-17 05:34:49.103: ERROR/AndroidRuntime(1683):     at android.widget.AbsListView$RecycleBin.setViewTypeCount(AbsListView.java:4387)
10-17 05:34:49.103: ERROR/AndroidRuntime(1683):     at android.widget.ListView.setAdapter(ListView.java:460)
10-17 05:34:49.103: ERROR/AndroidRuntime(1683):     at com.racontrs.Racontours.City.onCreate(City.java:66)
10-17 05:34:49.103: ERROR/AndroidRuntime(1683):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
10-17 05:34:49.103: ERROR/AndroidRuntime(1683):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611)
10-17 05:34:49.103: ERROR/AndroidRuntime(1683):  
   ... 11 more

对于这条线,我得到了

objTourListAdapter = new TourListAdapter(tourList, this);

listView.setAdapter(objTourListAdapter); // getting this when I try to add the adapter

在TourListAdapter里面,

public class TourListAdapter extends BaseAdapter {

    protected static final Context TourListAdapter = null;

    private ArrayList<Tour> tourList;

    private OnClickListener clickListener;
    private LayoutInflater mInflater;
    ViewHolder holder;
    City city;

    public TourListAdapter(ArrayList<Tour> tourList, City city) {
        this.city = city;
        this.tourList = tourList;
        mInflater = LayoutInflater.from(city);
        clickListener = (OnClickListener) city;
    }

    @Override
    public int getViewTypeCount() {
        return tourList.size();
    }

    @Override
    public int getItemViewType(int position) {
        return position;
    }

    @Override
    public int getCount() {
        return this.tourList.size();
    }

    @Override
    public Object getItem(int position) {
        return this.tourList.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        if (convertView == null) {
            convertView = mInflater.inflate(R.layout.listbox, null);
            convertView.setOnClickListener(clickListener);

            holder = new ViewHolder();
            holder.view1 = (TextView) convertView.findViewById(R.id.listText);
            holder.desc = (TextView) convertView.findViewById(R.id.editText1);
            holder.index = (TextView) convertView.findViewById(R.id.index);
            holder.desc.setVisibility(View.GONE);
            holder.priceBtn = (Button) convertView.findViewById(R.id.prcBtn);
            holder.icon = (ImageView) convertView.findViewById(R.id.listIcon);
            convertView.setTag(holder);
        } else {
            holder = (ViewHolder) convertView.getTag();
        }

        holder.view1.setText((String) tourList.get(position).getObjtourName());
        holder.desc.setText((String) tourList.get(position).getDescription());

        holder.priceBtn.setText((String) tourList.get(position).getObjPrice());
        holder.priceBtn.setOnClickListener(clickListener);

        holder.index.setText(String.valueOf(position));

        holder.icon.setImageBitmap(BitmapFactory
                .decodeFile((RaconTours.PATH + RaconTours.city + File.separator
                        + tourList.get(position).getObjtourName()
                        + File.separator + tourList.get(position)
                        .getThumbnailImageName()).replace(" ", "_")));

        return convertView;
    }
}

这是我对创建代码的活动

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.city);
    Bundle bundle = getIntent().getExtras();
    tourList = (ArrayList<Tour>) bundle.get("arrayTour");
    citytextView = (TextView) findViewById(R.id.tourcity);
    ImageButton btnBack = (ImageButton) findViewById(R.id.btnBack);
    btnBack.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            setResult(RESULT_OK);
            finish();
        }
    });
    btnMap = (ImageButton) findViewById(R.id.btnMap);
    btnMap.setOnClickListener(this);
    btnUt = (ImageButton) findViewById(R.id.utBtn);
    btnUt.setOnClickListener(this);
    // setting the City Name
    citytextView.setText(RaconTours.city);
    /**** Identifying a listView ****/
    ListView listView = (ListView) findViewById(R.id.tourList);
    /**** Creating a new List Adapter class for binding the values ****/
    objTourListAdapter = new TourListAdapter(tourList, this);
    listView.setAdapter(objTourListAdapter);
    listView.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
    metrics = getResources().getDisplayMetrics();
    float dpForIcon = 60f;
    heightIcon = (int) (metrics.density * dpForIcon + 0.5f);
    if (null != RaconTours.dialog) {
        RaconTours.dialog.dismiss();
    }
}

Answer 1

getViewTypeCount()应该返回ListView包含的不同视图的数量.如果ListView中的所有项目都是相同的类型,则应返回1.

这是错的,

@Override
public int getViewTypeCount() {

    return tourList.size();

}

因为当tourList.size()为零时,您将获得此异常

由于您只有一个"类型"的列表视图项使用此:

@Override
public int getViewTypeCount() {
    return 1;
}