Question

我有500多个项目放在一个分为类别的清单中。到目前为止，我的解决方案是使用多个expandableListView列表及其中的项目。当我检查一些复选框时，问题出现了，搞砸了，另外一个列表中的复选框被检查了，我不知道为什么..有人可以在这里点亮一些吗？

ExpandableListView.java

public class IngredientsExpandableList extends ExpandableListActivity {
// Create ArrayList to hold parent Items and Child Items
private ArrayList<ParentModel> parentItems = new ArrayList<ParentModel>();
private ArrayList<ChildModel> childItems = new ArrayList<ChildModel>();

@Override
public void onCreate(Bundle savedInstanceState)
{

    super.onCreate(savedInstanceState);

    // Create Expandable List and set it's properties
    ExpandableListView expandableList = getExpandableListView();
    expandableList.setDividerHeight(0);
    expandableList.setGroupIndicator(null);
    expandableList.setClickable(true);

    //Setting the data.
    setData();

    // Create the Adapter
    MyExpandableAdapter adapter = new MyExpandableAdapter(parentItems, childItems);

    adapter.setInflater(LayoutInflater.from(this), this);

    // Set the Adapter to expandableList
    expandableList.setAdapter(adapter);
    expandableList.setOnChildClickListener(this);
}
public void setData(){
    String[] colors = getResources().getStringArray(R.array.ingredientsColor);
    String[] innerColors = getResources().getStringArray(R.array.ingredientsInnerColor);

    // Set the Items of Parent
    for (int i = 0; i < 10; i++){
        parentItems.add(new ParentModel("ingredients "+(i+1), Color.parseColor(colors[i])));
    }
    // Set The Child Data
    ArrayList<String> child = null;
    for (int i = 0; i < parentItems.size(); i++){
        child = new ArrayList<String>();
        for (int k = 0; k < 4; k++){
            child.add("ingredient " + (k+1));
        }
        childItems.add(new ChildModel(child,Color.parseColor(innerColors[i])));
    }
}
public void makeToast(String string){
    Toast.makeText(this, string,
            Toast.LENGTH_SHORT).show();
}
public class ParentModel{
    String text;
    int color;
    public ParentModel(String text, int color) {
        this.text = text;
        this.color = color;
    }
    public String getText() {
        return text;
    }

    public int getColor() {
        return color;
    }
}
public class ChildModel{
    ArrayList<String> text;
    int color;
    public ChildModel(ArrayList<String> text, int color) {
        this.text = text;
        this.color = color;
    }
    public ArrayList<String> getText() {
        return text;
    }

    public int getColor() {
        return color;
    }
}
public class MyExpandableAdapter extends BaseExpandableListAdapter
{

    private Activity activity;
    private ArrayList<ChildModel> childItems;
    private LayoutInflater inflater;
    private ArrayList<ParentModel> parentItems;
    private ArrayList<String> child;

    // constructor
    public MyExpandableAdapter(ArrayList<ParentModel> parents, ArrayList<ChildModel> childern)
    {
        this.parentItems = parents;
        this.childItems = childern;
    }

    public void setInflater(LayoutInflater inflater, Activity activity)
    {
        this.inflater = inflater;
        this.activity = activity;
    }

    // method getChildView is called automatically for each child view.
    //  Implement this method as per your requirement
    @Override
    public View getChildView(int groupPosition, final int childPosition, boolean isLastChild, View convertView, ViewGroup parent)
    {

        child = childItems.get(groupPosition).getText();

        TextView textView = null;
        CheckBox checkBox = null;
        LinearLayout LinearView = null;

        if (convertView == null) {
            convertView = inflater.inflate(R.layout.child_list, null);
        }

        // get the textView reference and set the value
        textView = (TextView) convertView.findViewById(R.id.textView1);
        textView.setText(child.get(childPosition));

        LinearView = (LinearLayout) convertView.findViewById(R.id.layout);
        LinearView.setBackgroundColor(childItems.get(groupPosition).getColor());

        checkBox = (CheckBox) convertView.findViewById(R.id.checkBox1);

        // set the ClickListener to handle the click event on child item
        convertView.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View view) {
                makeToast("clicked");
            }
        });
        return convertView;
    }

    // method getGroupView is called automatically for each parent item
    // Implement this method as per your requirement
    @Override
    public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent)
    {

        if (convertView == null) {
            convertView = inflater.inflate(R.layout.parent_list, null);
        }

        ((CheckedTextView) convertView.findViewById(R.id.textViewGroup)).setText(parentItems.get(groupPosition).getText());
        ((CheckedTextView) convertView.findViewById(R.id.textViewGroup)).setBackgroundColor(parentItems.get(groupPosition).getColor());
        ((CheckedTextView) convertView.findViewById(R.id.textViewGroup)).setChecked(isExpanded);


        return convertView;
    }

    @Override
    public Object getChild(int groupPosition, int childPosition)
    {
        return null;
    }

    @Override
    public long getChildId(int groupPosition, int childPosition)
    {
        return 0;
    }

    @Override
    public int getChildrenCount(int groupPosition)
    {
        return childItems.get(groupPosition).getText().size();
    }

    @Override
    public Object getGroup(int groupPosition)
    {
        return null;
    }

    @Override
    public int getGroupCount()
    {
        return parentItems.size();
    }

    @Override
    public void onGroupCollapsed(int groupPosition)
    {
        super.onGroupCollapsed(groupPosition);
    }

    @Override
    public void onGroupExpanded(int groupPosition)
    {
        super.onGroupExpanded(groupPosition);
    }

    @Override
    public long getGroupId(int groupPosition)
    {
        return 0;
    }

    @Override
    public boolean hasStableIds()
    {
        return false;
    }

    @Override
    public boolean isChildSelectable(int groupPosition, int childPosition)
    {
        return false;
    }

}
}

Answer 1

这是因为视图在列表中被回收，因此您必须存储检查的状态，并确保将它们设置在get子视图中。像这样的东西

ID

多个列表复选框搞砸了

1 个答案: