在 Android 的自定义列表视图中使用单选按钮 [英] Using radio button in custom listview in Android
问题描述
我有一个使用 getView 完成的自定义列表视图.它必须是每行右侧的 4 个文本视图和一个单选按钮.我在这里看到了很多关于此的示例，但无法理解.这是我的 getView 函数.在这种情况下，我可以看到行，但是当我选择另一个单选按钮时，单选按钮仍然被选中.我应该在函数中添加什么才能使单选按钮正常工作并获取所选单选按钮的 ID?谢谢
I have a custom listview which is done with getView. It must be 4 textview and a radiobutton on the right in each row. I saw many examples about this here but couldn't get the idea. Here is my getView function. With this situation i can see the rows but radiobuttons are still checked when i choose another radiobutton. What should i have to add to the function to make radiobuttons work properly and get Id of the selected one? Thanks
private static class CitizenAdapter extends BaseAdapter {
private LayoutInflater mInflater;
public CitizenAdapter(Context context) {
mInflater = LayoutInflater.from(context);
}
public int getCount() {
return sicilArr.size();
}
public Object getItem(int position) {
return position;
}
public long getItemId(int position) {
return position;
}
public View getView(final int position, View convertView, ViewGroup parent) {
final ViewHolder holder;
if (convertView == null) {
convertView = mInflater.inflate(R.layout.table_row_citizen, null);
holder = new ViewHolder();
holder.text1 = (TextView) convertView.findViewById(R.id.TextView01);
holder.text2 = (TextView) convertView.findViewById(R.id.TextView02);
holder.text3 = (TextView) convertView.findViewById(R.id.TextView03);
holder.text4 = (TextView) convertView.findViewById(R.id.TextView04);
holder.radioCitizen = (RadioGroup) convertView.findViewById(R.id.radioGroupCitizen);
holder.radioButCitizen = (RadioButton) convertView.findViewById(R.id.radioButtonCitizen);
holder.radioCitizen.setOnCheckedChangeListener(new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
}
});
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.text1.setText(array1.get(position));
holder.text2.setText(array2.get(position));
holder.text3.setText(array3.get(position));
holder.text4.setText(array4.get(position));
return convertView;
}
static class ViewHolder {
TextView text1;
TextView text2;
TextView text3;
TextView text4;
RadioGroup radioCitizen;
RadioButton radioButCitizen;
}
}
这也是我的 xml 行文件:
Also this is my xml row file:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_height="wrap_content"
android:gravity="left|center"
android:layout_width="wrap_content"
android:paddingBottom="10px"
android:paddingTop="10px"
android:paddingLeft="3px">
<TextView
android:id="@+id/TextView01"
android:layout_width="50dp"
android:layout_height="wrap_content"
android:gravity="center"
android:textSize="15dip"
android:textStyle="bold"
android:textColor="#d08021">
</TextView>
<TextView
android:id="@+id/TextView02"
android:layout_width="120dp"
android:layout_height="wrap_content"
android:gravity="center"
android:textSize="15dip"
android:textStyle="bold"
android:textColor="#81A2BC">
</TextView>
<TextView
android:id="@+id/TextView03"
android:layout_width="120dp"
android:layout_height="wrap_content"
android:gravity="center"
android:textSize="15dip"
android:textStyle="bold"
android:textColor="#81A2BC">
</TextView>
<TextView
android:id="@+id/TextView04"
android:layout_width="120dp"
android:layout_height="wrap_content"
android:gravity="center"
android:textSize="15dip"
android:textStyle="bold"
android:textColor="#81A2BC">
</TextView>
<RadioGroup
android:id="@+id/radioGroupCitizen"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<RadioButton
android:id="@+id/radioButtonCitizen"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</RadioGroup>
推荐答案
一种方法是手动取消选中所有其他单选按钮.您可以创建变量来保持当前选定项目的位置.在 getView 中，您可以根据当前位置是否等于选定的位置来选中/取消选中当前单选按钮.当使用按下单选按钮时，您可以更改所选项目的位置并调用 notifyDatasetChanged.
还要检查这个问题:Android ListView with单选模式下的 RadioButton 和自定义行布局
One way is to manually uncheck all others radiobuttons. You can create variable that will keep position of currently selected item. And in getView you check/uncheck current radio button depending on whether current position equals to selected one. When use press radio button you change position of selected item and call notifyDatasetChanged.
Also check this quesion: Android ListView with RadioButton in singleChoice mode and a custom row layout
1) 将 private int selected = -1 添加到 CitizenAdapter.
2)为每个单选按钮添加点击监听器:
1) Add private int selected = -1 to CitizenAdapter.
2) Add click listener to each radiobutton:
holder.radioCitizen.setOnClickLisener(new View.OnClickListener()
{
@Override
public void onCheckedChanged(View view) {
selected = (Integer) view.getTag();
notifyDataSetChanged();
}
});
3) 将每个单选按钮的标签设置为当前位置并设置选中状态:
3) Set tag for each radiobutton to current position and set checked state:
// After you set text to 4 textviews
holder.radioButCitizen.setTag(position);
holder.radioButCitizen.setChecked(position == selected);
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