1

我有一个带有自定义适配器的列表视图。listView 中的自定义行包含 2 个图像按钮，当我单击它时需要处理它们。但它不像我想要的那样工作得很好，因为当我启动应用程序并单击 imagebutton 时，什么也没有发生，但是如果我先单击该行，然后单击 imageButton，那么我的单击将被处理。我尝试了一些解决方案来帮助这里的其他用户，但是没有人遇到与我完全相同的问题，即在单击行后得到处理。

最喜欢的活动

public class FavoriteActivity extends Activity {

    private List<Favorite> favoriteItem = new ArrayList<Favorite>();
    ViewHolder holder = new ViewHolder();


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.favorite);

        populateFavoriteList();
        populateListview();
        registerClickCallBack();
    }


    private void populateFavoriteList() {
        favoriteItem.add(new Favorite(R.drawable.icon_camera, "item 1"));
        favoriteItem.add(new Favorite(R.drawable.icon_camera, "item 2"));
        favoriteItem.add(new Favorite(R.drawable.icon_camera, "item 3"));
        favoriteItem.add(new Favorite(R.drawable.icon_camera, "item 4"));
        favoriteItem.add(new Favorite(R.drawable.icon_camera, "item 5"));
        favoriteItem.add(new Favorite(R.drawable.icon_camera, "item 6"));
        favoriteItem.add(new Favorite(R.drawable.icon_camera, "item 7"));
        favoriteItem.add(new Favorite(R.drawable.icon_camera, "item 8"));
    }

    private void populateListview() {
        ArrayAdapter<Favorite> adapter = new MyListAdapter();
        ListView list = (ListView) findViewById(R.id.favoriteList);
        list.setAdapter(adapter);
    }

    private class MyListAdapter extends ArrayAdapter<Favorite> {
        public MyListAdapter() {
            super(FavoriteActivity.this, R.layout.favorite_row, favoriteItem);
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            // To be sure we have a view, because null is possible
            View itemView = convertView;
            if (itemView == null) {
                itemView = getLayoutInflater().inflate(R.layout.favorite_row, parent, false);
            }

            // Find the item to work with
            Favorite currentItem = favoriteItem.get(position);

            // Filling the View         
            holder.thumbnail = (ImageButton) itemView.findViewById(R.id.favoriteThumbnail);
            holder.thumbnail.setBackgroundResource(currentItem.getThumbnail());

            holder.name = (TextView) itemView.findViewById(R.id.favoriteName);
            holder.name.setText(currentItem.getName());
            return itemView;
        }
    }

    private void registerClickCallBack() {

        ListView list = (ListView) findViewById(R.id.favoriteList);
        list.setOnItemClickListener(new AdapterView.OnItemClickListener(){
            @Override
            public void onItemClick(AdapterView<?> parent, View viewClicked, int position, long id) {           

                final Favorite favoriteClicked = favoriteItem.get(position);
                String msg = "Clicked position " + position + " which is " + favoriteClicked.getName();//Can I use my holder here to get the name back?? Because it wasn't working...               
                Toast.makeText(FavoriteActivity.this, msg, Toast.LENGTH_LONG).show();

                ImageButton btnDirections = (ImageButton) viewClicked.findViewById(R.id.favoriteDirections);
                ImageButton btnDelete = (ImageButton) viewClicked.findViewById(R.id.favoriteDelete);                

                btnDirections.setOnClickListener(new OnClickListener() {
                    String btnmsg = "getting directions for " + favoriteClicked.getName();
                    @Override
                    public void onClick(View v) {                       
                        Toast.makeText(FavoriteActivity.this, btnmsg, Toast.LENGTH_LONG).show();                        
                    }
                });

                btnDelete.setOnClickListener(new OnClickListener() {
                    String btnmsg = "getting delete for " + favoriteClicked.getName();
                    @Override
                    public void onClick(View v) {                       
                        Toast.makeText(FavoriteActivity.this, btnmsg, Toast.LENGTH_LONG).show();                        
                    }
                });             
            }           
        });         
    }

    static class ViewHolder {
        ImageButton thumbnail;
        TextView name;
    }
}

最喜欢的班级

public class Favorite {

    private int favoriteThumbnail;
    private String favoriteName;    

    public Favorite(int favoriteThumbnail, String favoriteName){
        super();
        this.favoriteThumbnail = favoriteThumbnail;
        this.favoriteName = favoriteName;
    }

    public int getThumbnail(){
        return favoriteThumbnail;
    }

    public String getName(){
        return favoriteName;
    }
}

最喜欢的行.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal"
    android:weightSum="4" 
    android:descendantFocusability="blocksDescendants">

    <ImageButton 
        android:layout_width="75dp"
        android:layout_height="65dp"
        android:contentDescription="thumbnail"
        android:src="@drawable/icon_camera"
        android:layout_weight="2"
        android:id="@+id/favoriteThumbnail"
        android:scaleType="fitXY"
        style="@style/favoriteRowItems"
        android:focusable="false"/>

    <TextView
        android:id="@+id/favoriteName"
        android:layout_weight="2"
        android:layout_gravity="center_vertical"
        android:text="Name"
        android:textSize="30sp"
        style="@style/favoriteRowItems"/>

    <ImageButton 
        android:contentDescription="Direction"
        android:layout_weight="0.5"
        android:src="@drawable/icon_directions"
        android:id="@+id/favoriteDirections"
        style="@style/favoriteRowItems"
        android:focusable="false"/>

    <ImageButton
        android:contentDescription="Delete from favorite" 
        android:layout_weight="0.5"
        android:src="@drawable/icon_delete"
        android:id="@+id/favoriteDelete"
        style="@style/favoriteRowItems"
        android:layout_marginRight="5dp"
        android:focusable="false"/>  

</LinearLayout>
4

2 回答 2

1

将您的两个按钮添加到getView方法中，并将它们包含在您的处理程序中，然后通过getView您要分配点击侦听器的方法，如下所示：

holder.btnDelete.setOnClickListener(new OnClickListener() {
    String btnmsg = "getting delete for " + favoriteClicked.getName();
    @Override
    public void onClick(View v) {                       
      Toast.makeText(FavoriteActivity.this, btnmsg, Toast.LENGTH_LONG).show();
    }
 });

因此，您的ViewHolder课程将如下所示：

  static class ViewHolder {
        ImageButton thumbnail;
        TextView name;
        ImageButton btnDelete;
        ImageButton btnDirections;
    }

and you set up the buttons in the getView() method as per the other Views

holder.btnDirections=(ImageButton)itemView.findViewById(R.id.favoriteDirections);
holder.btnDelete=(ImageButton)itemView.findViewById(R.id.favoriteDelete);
于 2013-05-09T11:19:15.490 回答
0

Well, you're initializing the click listeners of the buttons in the ListView's onItemClickListener(), of course it's only going to work after you click the row.

You need to set these up in the getView() method. Note, however, that it's not really standard practice to provide clickable items inside a ListView item.

于 2013-05-09T11:30:42.470 回答