ListView android行内的ImageButton不起作用

Question

我有一个 ListView，其中一行有一个 ImageButton。 我可以点击一个特定的行，这很有效：新的预期活动开始了。 但是，如果我单击 ImageButton，并且这是该行中的一个项目，则不会发生任何事情。 imageButton 被突出显示，但在 ImageButton 的 onClick 中的打印输出没有被执行。 谁能告诉我如何解决这个问题？ 这是我的代码：

    SimpleCursorAdapter menuItems2 = new SimpleCursorAdapter(
            this, R.layout.todo_row, matrixCursor, columnNames, to);
    ToDolv.setAdapter(menuItems2);

    ToDolv.setClickable(true);

    ToDolv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
          @Override
          public void onItemClick(AdapterView<?> arg0, View arg1, final int position, long arg3) { 
               final String article = (String) todoIDArray.get(position);
               globalVariable.setArtID(article);
               Intent intent1 = new Intent(MainActivity.this, AddToDo.class);
               startActivity(intent1);
               finish();

               ImageButton chkDone = (ImageButton) findViewById(R.id.chkDone);
               chkDone.setOnClickListener(new View.OnClickListener() {              
               @Override
                  public void onClick(View v) {
                     // TODO Auto-generated method stub
                     View parentRow = (View) v.getParent();
                     ListView listView = (ListView) parentRow.getParent();
                     final int position = listView.getPositionForView(parentRow);
                     System.out.println("I am in position "+ position);
               }
             });

          }

        });

这是 ImageButton 所在行的 XML：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="?android:attr/listPreferredItemHeight"
android:padding="6dip"
android:background = "#5a9b3e"
android:alpha = "0.7"
android:descendantFocusability="blocksDescendants"
>
    <TextView 
    android:id="@+id/id"
    android:textColor="#5a9b3e"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"

    />
    <TextView
        android:id="@+id/heading"
        android:layout_width="150dp"
        android:layout_height="wrap_content"
        android:textColor="#FFFFFF"
        android:textStyle="bold"
        android:alpha = "1.0"
        android:layout_alignParentTop="true"
        android:ellipsize="marquee"
        android:singleLine="false"
        android:textSize="12sp"
        />


   <ImageView
        android:id="@+id/icon"
        android:layout_width="20dp"
        android:layout_height="20dp"
        android:padding="2dp"
        android:layout_toRightOf="@+id/heading"
        android:layout_toEndOf="@+id/heading"

        />

   <ImageView 
       android:id="@+id/lights"
       android:layout_width= "20dp"
       android:layout_height="20dp"
       android:padding="2dp"
       android:layout_toRightOf="@+id/icon"
       android:layout_toEndOf="@+id/icon"
       />

    <ImageButton
    android:id="@+id/chkDone"
    android:layout_width="20dp"
    android:layout_height="20dp"
    android:padding="0dp"
    android:background="?android:attr/listChoiceBackgroundIndicator"
    android:layout_toRightOf="@+id/lights"
    android:layout_toEndOf="@+id/lights"
    android:src ="@drawable/checkbox"
    android:scaleType="fitXY"
    android:focusable="false"
    android:focusableInTouchMode="false"
    />
   <TextView 
       android:id="@+id/date"
       android:layout_width="wrap_content"
       android:layout_height="wrap_content"
       android:textColor="#FFFFFF"
       android:textStyle="bold"
       android:alpha = "1.0"
       android:layout_marginStart="2sp"
       android:layout_marginLeft="2sp"
       android:layout_marginTop="2sp"
       android:textSize="12sp" 
       android:layout_toRightOf="@+id/chkDone"
       android:layout_toEndOf="@+id/chkDone"/>
</RelativeLayout>

非常感谢！

编辑

根据建议，我创建了一个自定义适配器类来显示该行。所以我将代码更改如下： Main 活动现在有以下几行代码：

      ListView yourListView = (ListView) findViewById(R.id.list);
      SimpleCursorAdapter menuItems2 = new SimpleCursorAdapter(
            this, R.layout.todo_row, matrixCursor, columnNames, to);

      CustomListViewAdapter customAdapter = new CustomListViewAdapter(this, R.layout.todo_row, menuItems2);
      yourListView .setAdapter(customAdapter);

CustomListViewAdapter 看起来像：

public class CustomListViewAdapter extends ArrayAdapter<RowItem> {
Context context;
public CustomListViewAdapter(Context context, int resourceId,
        SimpleCursorAdapter menuItems2) {
    super(context, resourceId);
    this.context = context;
    System.out.println("I am in the custom Adapter class "+ context);
}
@Override
public View getView(int position, View convertView, ViewGroup parent){
    System.out.println("This is the get view");
    View row = convertView;
    if (row == null) {
       LayoutInflater mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
       row = mInflater.inflate(R.layout.todo_row, parent, false);
    }

    ImageButton chkDone = (ImageButton) row.findViewById(R.id.chkDone);
    chkDone.setOnClickListener(new View.OnClickListener() {              
          @Override
          public void onClick(View v) {
                View parentRow = (View) v.getParent();
                ListView listView = (ListView) parentRow.getParent();
                final int position =   listView.getPositionForView(parentRow);
                System.out.println("I am in position "+ position);
          }
     });

    return row;
}
}

XML 是一样的。

它编译了，但它什么也没做，现在甚至不显示该行... 如果您需要我发布构建 matrixCursor 的代码，请告诉我。

非常感谢，非常感谢。

Answer 1

您需要创建一个自定义适配器，该适配器接受可用于构建列表的对象列表。

您需要创建一个包含列表中所需信息的类。根据您所说的：

public class RowItem {

    private String _columnName;
    private Drawable _drawable;

    public RowItem(String columnName, Drawable drawable) {
         _columnName = columnName;
         _drawable = drawable;
    }

    public String getColumnName() {
        return _columnName;
    }

    public Drawable getDrawable() {
        return _drawable;
    }
}

然后从列表中您想要的项目创建这些对象

ArrayList<RowItem> rowItems = new ArrayList<>();

//Create a number of row items and add them to your list
RowItem myItem1 = new RowItem("String I want for column name", myDrawable);
rowItems.add(myItem1);

创建 RowItem 对象列表后，您可以像这样创建自定义适配器：

CustomListViewAdapter customAdapter = new CustomListViewAdapter(this, R.layout.todo_row, rowItems);

然后您可以通过它的构造器将您的 RowItem 对象列表传递到您的自定义适配器中（就像您之前尝试做的那样）：

public class CustomListViewAdapter extends ArrayAdapter<RowItem> {

Context context;
ArrayList<RowItem> _rowItems;

public CustomListViewAdapter(Context context, int resourceId,
        ArrayList<RowItem> rowItems) {
    super(context, resourceId);
    this.context = context;
    _rowItems = rowItems;
    System.out.println("I am in the custom Adapter class "+ context);
}

@Override
public View getView(int position, View convertView, ViewGroup parent){
    System.out.println("This is the get view");
    View row = convertView;
    RowItem item = _rowItems.get(position);

    // you can now get your string and drawable from the item
    // which you can use however you want in your list
    String columnName = rowItem.getColumnName();
    Drawable drawable = rowItem.getDrawable();
    if (row == null) {
        LayoutInflater mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
       row = mInflater.inflate(R.layout.todo_row, parent, false);

    }

    ImageButton chkDone = (ImageButton) row.findViewById(R.id.chkDone);
    chkDone.setOnClickListener(new View.OnClickListener() {              
          @Override
          public void onClick(View v) {
                View parentRow = (View) v.getParent();
                ListView listView = (ListView) parentRow.getParent();
                final int position =   listView.getPositionForView(parentRow);
                System.out.println("I am in position "+ position);
          }
     });

    return row;
}

Answer 2

试试这个

ImageButton chkDone = (ImageButton) findViewById(R.id.chkDone);
chkDone.setClickable(true);

可能对你有用

Answer 3

更改此行。您应该在您的AdapterView 中调用findViewById()，而不是在Activity。

ImageButton chkDone = (ImageButton) arg0.findViewById(R.id.chkDone);

更新 没错，很抱歉。您应该在您需要创建的适配器类中覆盖方法getView()。应该是这样的：

@Override
public View getView(int position, View convertView, ViewGroup parent){
    View row = convertView;
    if (row == null) {
       LayoutInflater mInflater = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
       row = mInflater.inflate(R.layout.mylistlayout, parent, false);
    }

    ImageButton chkDone = (ImageButton) findViewById(R.id.chkDone);
    chkDone.setOnClickListener(new View.OnClickListener() {              
          @Override
          public void onClick(View v) {
                View parentRow = (View) v.getParent();
                ListView listView = (ListView) parentRow.getParent();
                final int position =   listView.getPositionForView(parentRow);
                System.out.println("I am in position "+ position);
          }
     });

    return row;
}

Answer 4

查看您的 Java 代码，您似乎在 ListView 的 OnItemClickListener 中有 ImageButton 的 OnClickListener。因此，将它放在该方法之外，我相信它应该可以工作。

编辑：试试这个：

    public View getView(int position, View row, ViewGroup parent) {
            final ViewHolder holder;
            if (row == null) {
                LayoutInflater inflater = (LayoutInflater) context.getSystemService(context.LAYOUT_INFLATER_SERVICE);
                row = inflater.inflate(R.layout.items_layout, parent, false);
                holder = new ViewHolder();

                holder.chkDone = (ImageButton) row.findViewById(R.id.chkDone);

             row.setTag(holder);
            } else {
                holder = (ViewHolder)row.getTag();
            }

            // You add all your methods here...
            holder.chkDone.setOnClickListener(new View.OnClickListener() {              
               @Override
                  public void onClick(View v) {
                     // TODO Auto-generated method stub
                     View parentRow = (View) v.getParent();
                     ListView listView = (ListView) parentRow.getParent();
                     final int position = listView.getPositionForView(parentRow);
                     System.out.println("I am in position "+ position);
               }
             });

        }
        return(row);
    }

    class ViewHolder {
        ImageButton chkDone;
    }