android - 当 ExpandableListView 扩展时，CheckBoxes 自动取消选中

Question

public class ApisimpleActivity extends ExpandableListActivity {

    ExpandableListAdapter mAdapter;
Button btn;
CheckBox chk1;
String l="";
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        // Set up our adapter
        setContentView(R.layout.main);
        btn=(Button)findViewById(R.id.button);
        btn.setOnClickListener(new OnClickListener(){

            @Override
            public void onClick(View arg0) {
                // TODO Auto-generated method stub
            int i=getExpandableListView().getChildCount();  
            int k=0;
            //Toast.makeText(ApisimpleActivity.this, "hello"+i, Toast.LENGTH_LONG).show();

            Toast.makeText(ApisimpleActivity.this, k+"",Toast.LENGTH_LONG).show();
            }      });
        mAdapter = new MyExpandableListAdapter();
        setListAdapter(mAdapter);
        registerForContextMenu(getExpandableListView());
    }

    @Override
    public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {
        menu.setHeaderTitle("Sample menu");
        menu.add(0, 0, 0, "Hello World");
    }

    @Override
    public boolean onContextItemSelected(MenuItem item) {
        ExpandableListContextMenuInfo info = (ExpandableListContextMenuInfo) item.getMenuInfo();

        String title = ((TextView) info.targetView).getText().toString();

        int type = ExpandableListView.getPackedPositionType(info.packedPosition);
        if (type == ExpandableListView.PACKED_POSITION_TYPE_CHILD) {
            int groupPos = ExpandableListView.getPackedPositionGroup(info.packedPosition); 
            int childPos = ExpandableListView.getPackedPositionChild(info.packedPosition); 
            Toast.makeText(this, title + ": Child " + childPos + " clicked in group " + groupPos,
                    Toast.LENGTH_SHORT).show();
            return true;
        } else if (type == ExpandableListView.PACKED_POSITION_TYPE_GROUP) {
            int groupPos = ExpandableListView.getPackedPositionGroup(info.packedPosition); 
            Toast.makeText(this, title + ": Group " + groupPos + " clicked", Toast.LENGTH_SHORT).show();
            return true;
        }

        return false;
    }

    /**
     * A simple adapter which maintains an ArrayList of photo resource Ids. 
     * Each photo is displayed as an image. This adapter supports clearing the
     * list of photos and adding a new photo.
     *
     */
    public class MyExpandableListAdapter extends BaseExpandableListAdapter {
        // Sample data set.  children[i] contains the children (String[]) for groups[i].
        private String[] groups = { "People Names", "Dog Names", "Cat Names", "Fish Names" };
        private String[][] children = {
                { "Arnold", "Barry", "Chuck", "David" },
                { "Ace", "Bandit", "Cha-Cha", "Deuce" },
                { "Fluffy", "Snuggles" },
                { "Goldy", "Bubbles" }
        };
        View v;


        public Object getChild(int groupPosition, int childPosition) {
            return children[groupPosition][childPosition];
        }

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

        public int getChildrenCount(int groupPosition) {
            return children[groupPosition].length;
        }

        public TextView getGenericView() {
            // Layout parameters for the ExpandableListView
            AbsListView.LayoutParams lp = new AbsListView.LayoutParams(
                    ViewGroup.LayoutParams.FILL_PARENT, 64);

            TextView textView = new TextView(ApisimpleActivity.this);
            textView.setLayoutParams(lp);
            // Center the text vertically
            textView.setGravity(Gravity.CENTER_VERTICAL | Gravity.LEFT);
            // Set the text starting position
            textView.setPadding(36, 0, 0, 0);
            return textView;
        }

        public View getChildView(int groupPosition, int childPosition, boolean isLastChild,
                View convertView, ViewGroup parent) {
            TextView textView = getGenericView();
            textView.setText(getChild(groupPosition, childPosition).toString());
            return textView;
        }

        public Object getGroup(int groupPosition) {
            return groups[groupPosition];
        }

        public int getGroupCount() {
            return groups.length;
        }

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

        public View getGroupView(int groupPosition, boolean isExpanded, View convertView,
                ViewGroup parent) {
            v = null;
            v=convertView;
            if(v==null)
             {LayoutInflater vi = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
             v = vi.inflate(R.layout.group, null);
        /*   chk1 =(CheckBox)((View)v).findViewById(R.id.chk);
             chk1.setOnCheckedChangeListener(new OnCheckedChangeListener()
             {

                @Override
                public void onCheckedChanged(CompoundButton arg0, boolean arg1) {
                    TextView txt = null;
                    if(arg0.isChecked()==true)
                    {
                        txt=(TextView) v.findViewById(R.id.txt);
                    l+=txt.getText().toString();
                    Toast.makeText(ApisimpleActivity.this,l, Toast.LENGTH_LONG).show();
                    }

                }

             });*/
             }
        return v;}

        public boolean isChildSelectable(int groupPosition, int childPosition) {
            return true;
        }

        public boolean hasStableIds() {
            return true;
        }

    }
}

嗨，这是我的代码，它可以正常显示所有 child ，但问题是在 groupview 中，当我单击任何复选框然后展开它时，有一个复选框。它变成未选中任何人都可以告诉我它的原因未选中扩展列表以及如何解决此问题。 请帮忙解决这个问题。

Answer 1

也许对你有帮助。 将复选框设为静态，如果您使用多个复选框，则使用 stringbuilder 来存储选中的值。