Android的ListView的适配器OnClickListener问题 [英] Android ListView Adapter OnClickListener issue

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本文介绍了Android的ListView的适配器OnClickListener问题的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我创建了一个ListView为每个视图自定义布局。我有几个 onClickListeners 列表视图适配器 的TextView 中的自定义布局的项目之内。该onClickListeners列表视图适配器内的工作，我可以得到视图的位置，但是当我试图在拨打电话的 onClickListeners 在我活性的方法，我得到的不能让一个静态引用非静态方法的错误。于是，我开始将东西静态的，这使事情工作打算，但我敢肯定你们都知道这是一个很大的错误，它终于赶上了我。

到底如何做我访问我的主要活动方式未做方法静态？我在这个新的，所以请原谅我的noobish的问题。谢谢

部分code房源... 

 公共类主要的扩展活动{
    私人的ArrayList＆LT; D​​ataItem的＆GT; dataItems;
    私人DataItemAdapter AA;
    私人的ListView dataListView;

    @覆盖
    公共无效的onCreate（包savedInstanceState）{
        super.onCreate（savedInstanceState）;
        的setContentView（R.layout.main）;

        dataListView =（ListView控件）findViewById（R.id.dataListView）;
        dataItems =新的ArrayList＆LT; D​​ataItem的＆GT;（）;
        INT渣油= R.layout.dataitem;
        AA =新DataItemAdapter（这一点，渣油，dataItems）;
        dataListView.setAdapter（AA）;
        dataListView.setItemsCanFocus（真正的）;

    populateArray（）;
}

公共无效populateArray（）{
    的DataItem的newitem =新的DataItem（
            2008，法拉利，F430，红，ASX772
        ）;
    dataItems.add（0，的newitem）;
    的newitem =新的DataItem（
            2008，法拉利，F430，黑，TZB123
        ）;
    dataItems.add（0，的newitem）;
    的newitem =新的DataItem（
            2009年，法拉利，F430，红，MIDAS
        ）;
    dataItems.add（0，的newitem）;

    aa.notifyDataSetChanged（）;
}

公共静态无效modelInfo（INT POS）{
    Log.i（modelInfo，=+正）;
}

公共静态无效MAKEINFO（INT POS）{
    Log.i（MAKEINFO，=+ POS）;
}

公共静态无效assetinfo的（INT POS）{
    Log.i（assetinfo的，=+正）;
}

}


公共类DataItemAdapter扩展ArrayAdapter＆LT; D​​ataItem的＆GT; {
    私人活动的活动;
    私人诠释的资源;
    私有静态LayoutInflater吹气= NULL;

    公共DataItemAdapter（活动_activity，INT _resource，名单，其中，DataItem的＆GT; _items）{
        超（_activity，_resource，_items）;
        充气=（LayoutInflater）_activity.getSystemService（Context.LAYOUT_INFLATER_SERVICE）;
        资源= _resource;
        活动= _activity;
    }

公共静态类ViewHolder {
    TextView的carYear;
    TextView的carMake;
    TextView的carModel;
    TextView的carColor;
    TextView的ASSETTAG;
   }

@覆盖
公共查看getView（INT位置，查看convertView，ViewGroup中父）{
    查看VI = convertView;
    ViewHolder持有人;
    如果（convertView == NULL）{
        VI = inflater.inflate（资源，NULL）;
        持有人=新ViewHolder（）;
        holder.carYear =（TextView中）vi.findViewById（R.id.carYear）;
        holder.carMake =（TextView中）vi.findViewById（R.id.carMake）;
        holder.carModel =（TextView中）vi.findViewById（R.id.carModel）;
        holder.carColor =（TextView中）vi.findViewById（R.id.carColor）;
        holder.assetTag =（TextView中）vi.findViewById（R.id.assetTag）;
        vi.setTag（保持器）;
    } 其他 {
        支架=（ViewHolder）vi.getTag（）;
    }

    DataItem的项目=的getItem（位置）;

    holder.carYear.setText（item.getCarYear（））;
    holder.carMake.setText（item.getCarMake（））;
    holder.carModel.setText（item.getCarModel（））;
    holder.carColor.setText（item.getCarColor（））;
    holder.assetTag.setText（item.getAssetTag（））;

    holder.carYear.setTag（位置）;
    holder.assetTag.setTag（位置）;

    最后OnClickListener makeListener =新OnClickListener（）{
        @覆盖
        公共无效的onClick（视图v）{
            的LinearLayout LL =（的LinearLayout）v.getParent（）;
            TextView的电视=（TextView中）ll.getChildAt（0）;
            整数POS =（整数）tv.getTag（）;
            main.makeInfo（POS）;
        }
    };
    holder.carMake.setOnClickListener（makeListener）;

    最后OnClickListener modelListener =新OnClickListener（）{
        @覆盖
        公共无效的onClick（视图v）{
            的LinearLayout LL =（的LinearLayout）v.getParent（）;
            TextView的电视=（TextView中）ll.getChildAt（0）;
            整数POS =（整数）tv.getTag（）;
            main.modelInfo（POS）;

        }
   };

    holder.carModel.setOnClickListener（modelListener）;

    最后OnClickListener assetListener =新OnClickListener（）{
        @覆盖
        公共无效的onClick（视图v）{
            的LinearLayout LL =（的LinearLayout）v.getParent（）;
            TextView的电视=（TextView中）ll.getChildAt（0）;
            整数POS =（整数）tv.getTag（）;
            main.assetInfo（POS）;
        }
    };
    holder.assetTag.setOnClickListener（assetListener）;

    返回六;
}

解决方案

为什么你不附加一个onItemClickListener到你的活动你的ListView，而不是从在ListView每个内部景观进行项目单击

  dataListView =（ListView控件）findViewById（R.id.dataListView）;
        dataItems =新的ArrayList＆LT; D​​ataItem的＆GT;（）;
        INT渣油= R.layout.dataitem;
        AA =新DataItemAdapter（这一点，渣油，dataItems）;
        dataListView.setAdapter（AA）;
        //附加一个监听器列表视图
        dataListView.setOnItemClickListener（听众）;

        dataListView.setItemsCanFocus（真正的）;

和你的听众对onItemClick方法中可以访问活动的方法。

编辑1： 该OnItemClickListener给你下面的参数，适配器视图父，视图中查看，INT位置，长

您个人的TextView认为参数的孩子，你可以访问它获得childAt ......是这样的：

  OnItemClickListener监听器=新OnItemClickListener（）{

  @覆盖
  onItemClick（适配器视图＆LT;＆GT;母公司视图中查看，INT位置，长的id）{
      （（TextView中）view.findViewById（R.id.yourTextViewId））的getText（）;
      //或做你的东西
  }

}

编辑2：

您的主要活动，请记住，按照惯例，所有的类名都大写，所以主类必须是主类

 公共类主要扩展活动{
    私人的ArrayList＆LT; D​​ataItem的＆GT; dataItems;
    私人DataItemAdapter AA;
    私人的ListView dataListView;

    @覆盖
    公共无效的onCreate（包savedInstanceState）{
        super.onCreate（savedInstanceState）;
        的setContentView（R.layout.main）;

        dataListView =（ListView控件）findViewById（R.id.dataListView）;
        dataItems =新的ArrayList＆LT; D​​ataItem的＆GT;（）;
        INT渣油= R.layout.dataitem;
        AA =新DataItemAdapter（这一点，渣油，dataItems）;
        dataListView.setAdapter（AA）;
        dataListView.setItemsCanFocus（真正的）;

    populateArray（）;
}

公共无效populateArray（）{
    的DataItem的newitem =新的DataItem（
            2008，法拉利，F430，红，ASX772
        ）;
    dataItems.add（0，的newitem）;
    的newitem =新的DataItem（
            2008，法拉利，F430，黑，TZB123
        ）;
    dataItems.add（0，的newitem）;
    的newitem =新的DataItem（
            2009年，法拉利，F430，红，MIDAS
        ）;
    dataItems.add（0，的newitem）;

    aa.notifyDataSetChanged（）;
}

公共无效modelInfo（INT POS）{
    Log.i（modelInfo，=+正）;
}

公共无效MAKEINFO（INT POS）{
    Log.i（MAKEINFO，=+ POS）;
}

公共无效assetinfo的（INT POS）{
    Log.i（assetinfo的，=+正）;
}
}

现在，您的适配器

 公共类DataItemAdapter扩展ArrayAdapter＆LT; D​​ataItem的＆GT; {
    私人活动的活动;
    私人诠释的资源;
    私人LayoutInflater充气= NULL;

    公共DataItemAdapter（活动_activity，INT _resource，名单，其中，DataItem的＆GT; _items）{
        超（_activity，_resource，_items）;
        充气=（LayoutInflater）_activity.getSystemService（Context.LAYOUT_INFLATER_SERVICE）;
        //我总是这样做的方式，但我不认为这是错误
        //充气= LayoutInflater.from（_activity.getBaseContext（））;
        资源= _resource;
        活动= _activity;
    }

公共静态类ViewHolder {
    TextView的carYear;
    TextView的carMake;
    TextView的carModel;
    TextView的carColor;
    TextView的ASSETTAG;
   }

@覆盖
公共查看getView（INT位置，查看convertView，ViewGroup中父）{
    查看VI = convertView;
    ViewHolder持有人;
    如果（convertView == NULL）{
        VI = inflater.inflate（资源，NULL）;
        持有人=新ViewHolder（）;
        holder.carYear =（TextView中）vi.findViewById（R.id.carYear）;
        holder.carMake =（TextView中）vi.findViewById（R.id.carMake）;
        holder.carModel =（TextView中）vi.findViewById（R.id.carModel）;
        holder.carColor =（TextView中）vi.findViewById（R.id.carColor）;
        holder.assetTag =（TextView中）vi.findViewById（R.id.assetTag）;
        vi.setTag（保持器）;
    } 其他 {
        支架=（ViewHolder）vi.getTag（）;
    }

    DataItem的项目=的getItem（位置）;

    holder.carYear.setText（item.getCarYear（））;
    holder.carMake.setText（item.getCarMake（））;
    holder.carModel.setText（item.getCarModel（））;
    holder.carColor.setText（item.getCarColor（））;
    holder.assetTag.setText（item.getAssetTag（））;

    holder.carYear.setTag（位置）;
    holder.assetTag.setTag（位置）;

    最后OnClickListener makeListener =新OnClickListener（）{
        @覆盖
        公共无效的onClick（视图v）{
            的LinearLayout LL =（的LinearLayout）v.getParent（）;
            TextView的电视=（TextView中）ll.getChildAt（0）;
            整数POS =（整数）tv.getTag（）;
            //main.makeInfo(pos）;
            （（主要）活动）.makeInfo（POS）;
        }
    };
    holder.carMake.setOnClickListener（makeListener）;

    最后OnClickListener modelListener =新OnClickListener（）{
        @覆盖
        公共无效的onClick（视图v）{
            的LinearLayout LL =（的LinearLayout）v.getParent（）;
            TextView的电视=（TextView中）ll.getChildAt（0）;
            整数POS =（整数）tv.getTag（）;
            //main.modelInfo(pos）;
            （（主要）活动）.modelInfo（POS）;
        }
   };

    holder.carModel.setOnClickListener（modelListener）;

    最后OnClickListener assetListener =新OnClickListener（）{
        @覆盖
        公共无效的onClick（视图v）{
            的LinearLayout LL =（的LinearLayout）v.getParent（）;
            TextView的电视=（TextView中）ll.getChildAt（0）;
            整数POS =（整数）tv.getTag（）;
            //main.assetInfo(pos）;
            （（主要）活动）.assetInfo（POS）;
        }
    };
    holder.assetTag.setOnClickListener（assetListener）;

    返回六;
}

希望它的工作原理：）

I created a ListView with a custom layout for each view. I have several onClickListeners within the list view adapter for TextView items within the custom layout. The onClickListeners work within the list view adapter and I can obtain the position of the view, but when I try to make calls within the onClickListeners to methods in my activity, I get the "Cannot make a static reference to a non-static method" errors. So I started converting things to static, which made things work as intended, but I'm sure you all know it's a big mistake, which has finally caught up with me.

How the heck do I access methods in my main activity without making the methods static?? I'm new at this, so please forgive my noobish question. Thanks

partial code listing...

public class main extends Activity {
    private ArrayList<DataItem> dataItems;
    private DataItemAdapter aa;
    private ListView dataListView;  

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        dataListView = (ListView)findViewById(R.id.dataListView);     
        dataItems = new ArrayList<DataItem>();
        int resID = R.layout.dataitem;
        aa = new DataItemAdapter(this, resID, dataItems);
        dataListView.setAdapter(aa);
        dataListView.setItemsCanFocus(true);

    populateArray();
}

public void populateArray() {
    DataItem newItem = new DataItem(
            "2008","Ferrari","F430","Red","ASX772"
        );
    dataItems.add(0, newItem);
    newItem = new DataItem(
            "2008","Ferrari","F430","Black","TZB123"
        );
    dataItems.add(0, newItem);
    newItem = new DataItem(
            "2009","Ferrari","F430","Red","MIDAS"
        );
    dataItems.add(0, newItem);      

    aa.notifyDataSetChanged();
}

public static void modelInfo(int pos) {
    Log.i("modelInfo", "=" + pos);
}

public static void makeInfo(int pos) {
    Log.i("makeInfo", "=" + pos);
}

public static void assetInfo(int pos) {
    Log.i("assetInfo", "=" + pos);
}

}


public class DataItemAdapter extends ArrayAdapter<DataItem> {
    private Activity activity;
    private int resource;
    private static LayoutInflater inflater=null;

    public DataItemAdapter(Activity _activity,int _resource,List<DataItem> _items) {
        super(_activity, _resource, _items);
        inflater = (LayoutInflater)_activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        resource = _resource;
        activity = _activity;
    }

public static class ViewHolder {
    TextView carYear;
    TextView carMake;
    TextView carModel;
    TextView carColor;
    TextView assetTag;
   }

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    View vi=convertView;
    ViewHolder holder;
    if (convertView == null) {
        vi = inflater.inflate(resource, null);
        holder=new ViewHolder();
        holder.carYear = (TextView)vi.findViewById(R.id.carYear);
        holder.carMake = (TextView)vi.findViewById(R.id.carMake);
        holder.carModel = (TextView)vi.findViewById(R.id.carModel);
        holder.carColor = (TextView)vi.findViewById(R.id.carColor);
        holder.assetTag = (TextView)vi.findViewById(R.id.assetTag);
        vi.setTag(holder);
    } else {
        holder=(ViewHolder)vi.getTag();
    }

    DataItem item = getItem(position);  

    holder.carYear.setText(item.getCarYear());
    holder.carMake.setText(item.getCarMake());
    holder.carModel.setText(item.getCarModel());
    holder.carColor.setText(item.getCarColor());
    holder.assetTag.setText(item.getAssetTag());

    holder.carYear.setTag(position);
    holder.assetTag.setTag(position);

    final OnClickListener makeListener = new OnClickListener() {
        @Override
        public void onClick(View v) {
            LinearLayout ll = (LinearLayout)v.getParent();
            TextView tv = (TextView)ll.getChildAt(0);
            Integer pos = (Integer) tv.getTag();
            main.makeInfo(pos);
        }
    };
    holder.carMake.setOnClickListener(makeListener);

    final OnClickListener modelListener = new OnClickListener() {
        @Override
        public void onClick(View v) {
            LinearLayout ll = (LinearLayout)v.getParent();
            TextView tv = (TextView)ll.getChildAt(0);
            Integer pos = (Integer) tv.getTag();
            main.modelInfo(pos);

        }
   };        

    holder.carModel.setOnClickListener(modelListener);

    final OnClickListener assetListener = new OnClickListener() {
        @Override
        public void onClick(View v) {
            LinearLayout ll = (LinearLayout)v.getParent();
            TextView tv = (TextView)ll.getChildAt(0);
            Integer pos = (Integer) tv.getTag();
            main.assetInfo(pos);
        }
    };
    holder.assetTag.setOnClickListener(assetListener);        

    return vi;
}

解决方案

why you dont attach an onItemClickListener to your ListView in your activity, instead of perform ItemClick from each inner view in the ListView

        dataListView = (ListView)findViewById(R.id.dataListView);     
        dataItems = new ArrayList<DataItem>();
        int resID = R.layout.dataitem;
        aa = new DataItemAdapter(this, resID, dataItems);
        dataListView.setAdapter(aa);
        //attach a listener to the list view
        dataListView.setOnItemClickListener (listener);

        dataListView.setItemsCanFocus(true);

and inside your listener on onItemClick method you can access the activity methods.

EDIT 1: the OnItemClickListener gives to you the following parameters, AdapterView parent, View view, int position, long

your individual TextView is a child of the view parameter and you can access to it getting the childAt... something like this:

OnItemClickListener listener = new OnItemClickListener (){

  @Override
  onItemClick(AdapterView<?> parent, View view, int position, long id){
      ((TextView)view.findViewById(R.id.yourTextViewId)).getText();
      //or do your stuff
  }

}

EDIT 2:

your main activity, remember, by convention all Class name are capitalized, so main class must be Main class

public class Main extends Activity {
    private ArrayList<DataItem> dataItems;
    private DataItemAdapter aa;
    private ListView dataListView;  

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        dataListView = (ListView)findViewById(R.id.dataListView);     
        dataItems = new ArrayList<DataItem>();
        int resID = R.layout.dataitem;
        aa = new DataItemAdapter(this, resID, dataItems);
        dataListView.setAdapter(aa);
        dataListView.setItemsCanFocus(true);

    populateArray();
}

public void populateArray() {
    DataItem newItem = new DataItem(
            "2008","Ferrari","F430","Red","ASX772"
        );
    dataItems.add(0, newItem);
    newItem = new DataItem(
            "2008","Ferrari","F430","Black","TZB123"
        );
    dataItems.add(0, newItem);
    newItem = new DataItem(
            "2009","Ferrari","F430","Red","MIDAS"
        );
    dataItems.add(0, newItem);      

    aa.notifyDataSetChanged();
}

public void modelInfo(int pos) {
    Log.i("modelInfo", "=" + pos);
}

public void makeInfo(int pos) {
    Log.i("makeInfo", "=" + pos);
}

public void assetInfo(int pos) {
    Log.i("assetInfo", "=" + pos);
}
}

Now, your adapter

public class DataItemAdapter extends ArrayAdapter<DataItem> {
    private Activity activity;
    private int resource;
    private LayoutInflater inflater=null;

    public DataItemAdapter(Activity _activity,int _resource,List<DataItem> _items) {
        super(_activity, _resource, _items);
        inflater = (LayoutInflater)_activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        //i always do this way, but i dont think this is the error
        //inflater = LayoutInflater.from(_activity.getBaseContext());
        resource = _resource;
        activity = _activity;
    }

public static class ViewHolder {
    TextView carYear;
    TextView carMake;
    TextView carModel;
    TextView carColor;
    TextView assetTag;
   }

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    View vi=convertView;
    ViewHolder holder;
    if (convertView == null) {
        vi = inflater.inflate(resource, null);
        holder=new ViewHolder();
        holder.carYear = (TextView)vi.findViewById(R.id.carYear);
        holder.carMake = (TextView)vi.findViewById(R.id.carMake);
        holder.carModel = (TextView)vi.findViewById(R.id.carModel);
        holder.carColor = (TextView)vi.findViewById(R.id.carColor);
        holder.assetTag = (TextView)vi.findViewById(R.id.assetTag);
        vi.setTag(holder);
    } else {
        holder=(ViewHolder)vi.getTag();
    }

    DataItem item = getItem(position);  

    holder.carYear.setText(item.getCarYear());
    holder.carMake.setText(item.getCarMake());
    holder.carModel.setText(item.getCarModel());
    holder.carColor.setText(item.getCarColor());
    holder.assetTag.setText(item.getAssetTag());

    holder.carYear.setTag(position);
    holder.assetTag.setTag(position);

    final OnClickListener makeListener = new OnClickListener() {
        @Override
        public void onClick(View v) {
            LinearLayout ll = (LinearLayout)v.getParent();
            TextView tv = (TextView)ll.getChildAt(0);
            Integer pos = (Integer) tv.getTag();
            //main.makeInfo(pos);
            ((Main)activity).makeInfo(pos);
        }
    };
    holder.carMake.setOnClickListener(makeListener);

    final OnClickListener modelListener = new OnClickListener() {
        @Override
        public void onClick(View v) {
            LinearLayout ll = (LinearLayout)v.getParent();
            TextView tv = (TextView)ll.getChildAt(0);
            Integer pos = (Integer) tv.getTag();
            //main.modelInfo(pos);
            ((Main)activity).modelInfo(pos);
        }
   };        

    holder.carModel.setOnClickListener(modelListener);

    final OnClickListener assetListener = new OnClickListener() {
        @Override
        public void onClick(View v) {
            LinearLayout ll = (LinearLayout)v.getParent();
            TextView tv = (TextView)ll.getChildAt(0);
            Integer pos = (Integer) tv.getTag();
            //main.assetInfo(pos);
            ((Main)activity).assetInfo(pos);
        }
    };
    holder.assetTag.setOnClickListener(assetListener);        

    return vi;
}

hope it works :)

这篇关于Android的ListView的适配器OnClickListener问题的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！

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