android - 在 Android 的 ListView 中操作 RadioButton

Question

我使用自定义适配器创建了一个自定义 ListView，每行都带有 radioButton。我想在检查其父 View (列表项)时以编程方式检查单选按钮，然后取消选中其他 ListView 项目中的其他 RadioButtons。谁能给我解决方案？

更新

这是我的 getView()

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    LinearLayout v = null;

    final Item i = items.get(position);

    EntryItem ei = (EntryItem) i;
    v = (LinearLayout) vi.inflate(R.layout.list_item_entry, null);
    final TextView title = (TextView) v
                    .findViewById(R.id.list_item_entry_title);
    final TextView subtitle = (TextView) v
                    .findViewById(R.id.list_item_entry_summary);


    RadioButton radioButton = new RadioButton(context);
    radioButton.setFocusable(false);
    radioButton.setFocusableInTouchMode(false);
    v.addView(radioButton); 

    if (title != null)
                title.setText(ei.title);
    if (subtitle != null)
                subtitle.setText(ei.subtitle);


    convertView = v;
    return convertView;
}

Answer 1

如果要选择单个项目，可以使用一个int变量，用-1初始化；

int index =-1;

在getView方法中添加一行:

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    LinearLayout v = null;

    final Item i = items.get(position);

    EntryItem ei = (EntryItem) i;
    v = (LinearLayout) vi.inflate(R.layout.list_item_entry, null);
    final TextView title = (TextView) v
                    .findViewById(R.id.list_item_entry_title);
    final TextView subtitle = (TextView) v
                    .findViewById(R.id.list_item_entry_summary);


    RadioButton radioButton = new RadioButton(context);
    radioButton.setFocusable(false);
    radioButton.setFocusableInTouchMode(false);
    radioButton.setChecked(index==position);
    radioButton.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {                       
                    @Override
                    public void onCheckedChanged(CompoundButton arg0, boolean arg1) {

                    }
                });
                v.addView(radioButton);
            } 
            if (title != null)
                title.setText(ei.title);
            if (subtitle != null)
                subtitle.setText(ei.subtitle);
        }

    convertView = v;
    return convertView;
}

并在监听器的 OnItemClick 方法中，执行:

index=position;
adapter.notifyDataSetInvalidated();