how to add listener in android on row?

2019-09-20 16:24发布

问题:

I am trying to make a custom list using a custom adapter and a fragment. I am able to make a list view. But there is one problem, I have an image button and a text view in a row. I want to listen to the click event of the row, as well as the Image button's click event. In other words, I need to add a listener that will listen when the row is clicked and when the image button that is present on the row is clicked.

Here is my code:

custom adapter

public class CustomAdapter extends BaseAdapter implements View.OnClickListener {

    private Activity activity;
    private ArrayList data;
    private static LayoutInflater inflater = null;


    public CustomAdapter(Activity a, ArrayList d) {

        /********** Take passed values **********/
        activity = a;
        data = d;
        inflater = (LayoutInflater) activity.
                getSystemService(Context.LAYOUT_INFLATER_SERVICE);


    }


    @Override
    public int getCount() {
        if (data.size() <= 0)
            return 1;
        return data.size();
    }

    @Override
    public Object getItem(int position) {
        return position;
    }

    @Override
    public void onClick(View v) {

        Log.d("row is click","row click");

    }

    /*********
     * Create a holder Class to contain inflated xml file elements
     *********/
    public static class ViewHolder {

        public TextView text;

        public ImageButton imageButton;

    }

    @Override
    public long getItemId(int position) {
        return 0;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {

        View vi = convertView;
        ViewHolder holder;

        if (convertView == null) {

            /****** Inflate tabitem.xml file for each row ( Defined below ) *******/
            vi = inflater.inflate(R.layout.row_layout, null);

            /****** View Holder Object to contain tabitem.xml file elements ******/

            holder = new ViewHolder();
            holder.text = (TextView) vi.findViewById(R.id.station_name);

            holder.imageButton = (ImageButton) vi.findViewById(R.id.favorite);

            /************  Set holder with LayoutInflater ************/
            vi.setTag(holder);
        } else
            holder = (ViewHolder) vi.getTag();

        if (data.size() <= 0) {
            holder.text.setText("No Data");

        } else {

            String string = (String) data.get(position);

            /************  Set Model values in Holder elements ***********/

            holder.text.setText(string);


        }
        return vi;
    }
}

row_layout.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal"
    android:descendantFocusability="blocksDescendants">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/station_name"
        android:padding="10dp"
        android:textColor="#eee345"
        android:textAppearance="?android:textAppearanceLarge"
        />

    <ImageButton android:id="@+id/favorite"
        android:layout_width="wrap_content"
        android:layout_height="fill_parent"
        android:src="@drawable/start"
        android:background="#00ffffff"
     />


</LinearLayout>

fragmentone.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:background="#325633"
   >

    <ListView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/list_view">
    </ListView>

</LinearLayout>

fragmentone.java

public class Fragmentone  extends Fragment{

    ArrayList<String> name;
    boolean isPressed=false;

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment_one, container, false);
        name=new ArrayList<String>();
        name.add("First Station");
        name.add("Second Station");





        ListView listView = (ListView) view.findViewById(R.id.list_view);

        CustomAdapter customAdapter =new CustomAdapter(getActivity(),name);
        listView.setAdapter(customAdapter);



        return view;
    }


}

回答1:

Check it out this code, if you have any trouble to understand comment

public class CustomAdapter extends BaseAdapter {

    private Activity activity;
    private ArrayList data;
    private static LayoutInflater inflater = null;

    public CustomAdapter(Activity a, ArrayList d) {

        /********** Take passed values **********/
        activity = a;
        data = d;
        inflater = (LayoutInflater) activity
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);

    }

    @Override
    public int getCount() {
        if (data.size() <= 0)
            return 1;
        return data.size();
    }

    @Override
    public Object getItem(int position) {
        return position;
    }

    /*********
     * Create a holder Class to contain inflated xml file elements
     *********/
    public static class ViewHolder {

        public TextView text;

        public ImageButton imageButton;

    }

    @Override
    public long getItemId(int position) {
        return 0;
    }

    @Override
    public View getView(final int position, View convertView, ViewGroup parent) {

        View vi = convertView;
        ViewHolder holder;

        if (convertView == null) {

            /****** Inflate tabitem.xml file for each row ( Defined below ) *******/
            vi = inflater.inflate(R.layout.row_layout, null);

            /****** View Holder Object to contain tabitem.xml file elements ******/

            holder = new ViewHolder();
            holder.text = (TextView) vi.findViewById(R.id.station_name);

            holder.imageButton = (ImageButton) vi.findViewById(R.id.favorite);

            /************ Set holder with LayoutInflater ************/
            vi.setTag(holder);
        } else
            holder = (ViewHolder) vi.getTag();

        if (data.size() <= 0) {
            holder.text.setText("No Data");

        } else {

            String string = (String) data.get(position);

            /************ Set Model values in Holder elements ***********/

            holder.text.setText(string);

        }

        // this is for overall row click
        convertView.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {

            }
        });
        // this is for image button onclick
        holder.imageButton.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {

            }
        });
        ;

        return vi;
    }
}


回答2:

In your Activity class where you defined listView use setOnItemClickListener...

listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {

        @Override
        public void onItemClick(AdapterView<?> parent, View view,
                int position, long id) {

         /** here position indicate item clicked on list,
             you can use SWITCH CASE to do things according to
             position clicked..
         */
        }                       
});

This you can use in Adapter class:

Row(View) listener:

vi.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {

    }
});

Image listener:

holder.imageButton.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {

    }
});