如何覆盖 CheckBox 的默认onClick()
行为?
用例我希望复选框反映在行视图中呈现的对象的一些布尔状态。当用户单击该行(包括复选框)时,将运行一些可能会改变对象状态(布尔变量)的进程。
现在如何防止 CheckBox 的默认 onClick 行为启动?换句话说,我想CheckBox.onClick()
打电话给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/关状态并且不实现可点击?
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>