Question

如何覆盖CheckBox的默认onClick()行为？

用例我希望checkBox反映在行视图中呈现的对象的某些布尔状态。当用户单击该行（包括checkBox）时，将运行一些可能改变对象状态（布尔变量）的进程。

现在如何阻止CheckBox的默认onClick行为？换句话说，我希望CheckBox.onClick()致电theCustomAdapter.onItemClick()。我如何实现这一目标？

再想一想，是否有任何这样的小部件对象只显示开/关状态＆amp;没有实现Clickable？

自定义适配器

public class UserListViewAdapter extends ArrayAdapter<User> implements AdapterView.OnItemClickListener
{
    private final Context context;
    private final List<User> users;

    public UserListViewAdapter(Context context, int resource, List<User> users)
    {
        super(context, resource, users);
        this.context = context;
        this.users = users;
    }

    public View getView(int position, View convertView, ViewGroup parent)
    {
        LayoutInflater layoutInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View row = layoutInflater.inflate(R.layout.user, parent, false);

//        set the loggedIn? isCurrent? radio buttons
        CheckBox checkBox = (CheckBox) row.findViewById(R.id.isLoggedIn);
        checkBox.setChecked(users.get(position).isLoggedIn());
        checkBox = (CheckBox) row.findViewById(R.id.isCurrent);
        checkBox.setChecked(users.get(position).isCurrent());

//        fill the user name
        TextView textView = (TextView) row.findViewById(R.id.userName);
        textView.setText(users.get(position).getUserName());

//        fill the user id
        textView = (TextView) row.findViewById(R.id.userId);
        textView.setText(users.get(position).getUserId());

//        return the row
        return row;
    }

//    @Override
    public void onItemClick(AdapterView<?> adapterView, View view, int i, long l)
    {
        Log.i("Clicked", adapterView.toString());
        Toast.makeText(this.context, "Clicked! "+l, Toast.LENGTH_LONG).show();
    }
}

自定义行视图

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:orientation="horizontal"
              android:layout_width="wrap_content"
              android:layout_height="wrap_content"
            android:gravity="center"
        android:clickable="true">
    <CheckBox android:layout_height="wrap_content"
                 android:layout_width="wrap_content"
                 android:id="@+id/isLoggedIn"
                 android:padding="4dp"
                android:gravity="center"
            android:focusable="false"
            android:clickable="false"
            android:focusableInTouchMode="false"/>
    <CheckBox android:layout_height="wrap_content"
                 android:layout_width="wrap_content"
                 android:id="@+id/isCurrent"
                 android:padding="4dp"
                 android:gravity="center"
                android:focusable="false"
                android:clickable="false"
                android:focusableInTouchMode="false"/>
    <TextView android:layout_height="wrap_content"
              android:layout_width="wrap_content"
              android:id="@+id/userName"
              android:padding="4dp"
            android:gravity="left"
            android:focusable="false"
            android:clickable="false"
            android:focusableInTouchMode="false"/>
    <TextView android:layout_height="wrap_content"
              android:layout_width="wrap_content"
              android:id="@+id/userId"
              android:padding="4dp"
            android:gravity="left"
            android:focusable="false"
            android:clickable="false"
            android:focusableInTouchMode="false"/>
</LinearLayout>

Answer 1

CheckBoxes的替代方法是切换按钮：

http://developer.android.com/guide/topics/ui/controls/togglebutton.html

在示例中，您可以看到如何根据您可能想要设置的条件切换，ToggleButton如何自行决定。

ListBox中的CheckBox

1 个答案: