如何在android上添加监听器?

时间:2015-09-01 04:25:48

标签: android android-layout android-fragments android-intent

我正在尝试使用自定义适配器和片段创建自定义列表。我能够制作一个列表视图。但是有一个问题,我有一个图像按钮和一个文本视图。我想听一下该行的点击事件,以及图片按钮的点击事件。换句话说,我需要添加一个侦听器,该侦听器将在单击该行时以及单击该行上存在的图像按钮时进行侦听。

这是我的代码:

自定义适配器

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;
    }


}

2 个答案:

答案 0 :(得分:1)

如果您无法理解评论

,请查看此代码
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;
    }
}

答案 1 :(得分:0)

在您定义listView的Activity类中,使用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..
         */
        }                       
});

这可以在Adapter类中使用:

行(视图)监听器:

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

    }
});

图片监听器:

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

    }
});