Question

我有一个与BaseExpandableListAdapter相关联的ExpendableListView。在此列表中，当用户单击某个子项时，它会触发一些方法并设置checkBox以进行检查（如果用户再次单击，则同样的事情，但chackBox未经检查）。

为了能够正确使用onChildClick方法，我已将checkBox设置为android:enabled="false"，如众多帖子所示。

问题是，checkBox会自动变为灰色，检查与否。它不会影响活动的行为，但它不是非常直观（不像检查是浅绿色时）。

如何保持完全相同的行为，但使用彩色复选框？

或者换句话说，是否可以（并且很简单）使用android:enabled="false"并保持视图的颜色？

以下是checkBox的xml代码：

<CheckBox android:id="@+id/config_can_spn_checkbox"
android:layout_marginRight="30dip"
android:layout_weight="1"
android:layout_width="0dip"
android:layout_height="match_parent"
android:enabled="false"
android:focusable="false" />

BaseExpandableListAdapter类：

公共类ConfigCanAdapter扩展了BaseExpandableListAdapter {

private Context context;
private List<Pgn> pgnList;
private LayoutInflater inflater;

public ConfigCanAdapter(Context context, List<Pgn> pgnList) {
    this.context = context;
    this.pgnList = pgnList;
    inflater = LayoutInflater.from(context);
}

@Override
public boolean areAllItemsEnabled() {
    return true;
}

public Spn getChild(int gPosition, int cPosition) {
    return pgnList.get(gPosition).getSpnList().get(cPosition);
}

public long getChildId(int gPosition, int cPosition) {
    return cPosition;
}

public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {

    final Spn spn = (Spn) getChild(groupPosition, childPosition);

    ChildViewHolder childViewHolder;

    if (convertView == null) {
        childViewHolder = new ChildViewHolder();

        convertView = inflater.inflate(R.layout.group_child, null);

        childViewHolder.textViewChildSpnName = (TextView) convertView.findViewById(R.id.config_can_spn_name_text);
        childViewHolder.textViewChildSpnUnit = (TextView) convertView.findViewById(R.id.config_can_spn_unit_text);
        childViewHolder.checkBoxChildSpn = (CheckBox) convertView.findViewById(R.id.config_can_spn_checkbox); 

        convertView.setTag(childViewHolder);
    } else {
        childViewHolder = (ChildViewHolder) convertView.getTag();
    }

    childViewHolder.textViewChildSpnName.setText(spn.getName());

    childViewHolder.textViewChildSpnUnit.setText("(" + spn.getUnit() + ")");        

    return convertView;
}

public int getChildrenCount(int gPosition) {
    return pgnList.get(gPosition).getSpnList().size();
}

public Object getGroup(int gPosition) {
    return pgnList.get(gPosition);
}


public int getGroupCount() {
    return pgnList.size();
}

public long getGroupId(int gPosition) {
    return gPosition;
}

public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
    GroupViewHolder gholder;
    Pgn pgn = (Pgn) getGroup(groupPosition);

    if (convertView == null) {
        gholder = new GroupViewHolder();

        convertView = inflater.inflate(R.layout.group_row, null);

        gholder.textViewGroup = (TextView) convertView.findViewById(R.id.TVGroup);

        convertView.setTag(gholder);
    } else {
        gholder = (GroupViewHolder) convertView.getTag();
    }

    gholder.textViewGroup.setText(pgn.getId());

    return convertView;
}

public boolean hasStableIds() {
    return true;
}

public boolean isChildSelectable(int arg0, int arg1) {
    return true;
}

class GroupViewHolder {
    public TextView textViewGroup;
}

class ChildViewHolder {
    public TextView textViewChildSpnName;
    public TextView textViewChildSpnUnit;
    public CheckBox checkBoxChildSpn;
}

}

最后是onChildClickListener：

expandableList.setOnChildClickListener(new OnChildClickListener() {

    @Override
    public boolean onChildClick(ExpandableListView parent, View v, int groupPosition, int childPosition, long id) {
        // TODO Auto-generated method stub
        CheckBox cb = (CheckBox)v.findViewById(R.id.config_can_spn_checkbox);
        cb.toggle();
        Toast.makeText(getBaseContext(), "Group = " + String.valueOf(groupPosition) + " child = " + String.valueOf(childPosition), Toast.LENGTH_SHORT).show();
        return false;
    }
});

Answer 1

您可以将按钮的选择器覆盖为以下内容：

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
   <item android:state_enabled="false" android:drawable="@drawable/image_enabled" />
   <item android:drawable="@drawable/image_enabled" />
</selector>

不确定这段代码是否适合您，但这是一个想法:)请查看here和here获取教程。

Answer 2

您可以使用点击侦听器来拦截点击并更改值，而不是禁用该复选框。这听起来像是一个黑客;你也可以将视图子类化并以这种方式覆盖不良行为。

Answer 3

您可以设置android:clickable="false"和android:focusable="false"，它会占用所有点击次数而不会占用焦点但保持enabled看起来像您想要的

设置视图已禁用但保留颜色

3 个答案: