我正在尝试编写一个简单的清单应用程序，其中包含一个 LinkedList 视图，该视图具有文本和两个指示是/否的单选按钮。问题是，当我向下滚动时选中一个单选按钮时，LinkedList 会更改单选按钮中的答案。我很感激你有任何建议。
我的代码如下
我的主要布局
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/relative"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<ListView
android:id="@+id/list"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:cacheColorHint="#00000000"
android:divider="#b5b5b5"
android:dividerHeight="1dp" />
</RelativeLayout>
我的行项目布局
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Large Text"
android:textAppearance="?android:attr/textAppearanceLarge" />
<RadioGroup
android:id="@+id/radio_group1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical|center_horizontal"
android:orientation="horizontal" >
<RadioButton
android:id="@+id/mRadio1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="radio1" />
<RadioButton
android:id="@+id/mRadio2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="radio2" />
</RadioGroup>
</LinearLayout>
我的主要清单活动的后端 java 类
public class Checklist2 extends Activity {
//Class Values
AlertHandler ah; // object that manages the database of alerts
QuestionHandler qh; // object that manages the database of questions
List <Question>questions ; //List that holds all the Question items in the program
List <Alert> alerts; //List that holds all the Alert items in the program
private ArrayList<RowObject> mSource;
TextView mCountTextView; // from internet example
ListView mListView;
RadioGroupAdapter adapter;
private ListView listView1;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.checklist2);
Log.w("Test", "setList()");
setList();
RadioGroup rg = (RadioGroup) findViewById(R.id.radio_group1);
}
//sets the ListView with questions
private void setList(){
mSource = new ArrayList<RowObject>();
Log.w("Test", "ArrayList<RowObject> created");
for (int i =0; i<questions.size(); i++){
Question q = questions.get(i);
mSource.add(new RowObject());
mSource.get(i).setID(q.getID());
mSource.get(i).setQuestion(q.getQuestion());
mSource.get(i).setYes(false);
mSource.get(i).setNo(false);
}
Log.w("Test", "array list filled");
mListView = (ListView) findViewById(R.id.list);
adapter = new RadioGroupAdapter(this,
R.layout.listitem, mSource);
Log.w("Test", "adapter created");
mListView.setAdapter(adapter);
Log.w("Test", "adapter set");
}}
My RowObject.java class
package com.randstad.jpmcchecklist;
public class RowObject {
private int ID;
private boolean yes;
private boolean no;
public String question;
public RowObject(){
super();
}
public RowObject(int iD, String q,boolean y) {
super();
ID = iD;
question = q;
this.yes = y;
}
public RowObject( String question) {
super();
this.question = question;
}
public void setYes(boolean y){
yes = y;
}
public boolean getYes(){
return yes;
}
public void setNo(boolean n){
no = n;
}
public boolean getNo(){
return no;
}
public void setQuestion(String q){
question = q;
}
public String getQuestion(){
return question;
}
public void setID(int id){
ID = id;
}
public int getID(){
return ID;
}
}
My Adapter class
public class RadioGroupAdapter extends ArrayAdapter<RowObject> {
Context context;
int layoutResourceId;
ArrayList <RowObject> data = null;
int position;
ViewHolder holder;
public RadioGroupAdapter(Context context, int layoutResourceId,
ArrayList <RowObject> data) {
super(context, layoutResourceId, data);
this.layoutResourceId = layoutResourceId;
this.context = context;
this.data = data;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
View row = convertView;
holder = null;
this.position = position;
if (row == null) {
LayoutInflater inflater = ((Activity) context).getLayoutInflater();
row = inflater.inflate(layoutResourceId, parent, false);
holder = new ViewHolder();
holder.txtTitle = (TextView) row.findViewById(R.id.textView1);
holder.yes = (RadioButton) row.findViewById(R.id.mRadio1);
holder.no = (RadioButton) row.findViewById(R.id.mRadio2);
holder.group = (RadioGroup) row.findViewById(R.id.radio_group1);
row.setTag(holder);
//final RadioButton[] rb = new RadioButton[2];
/*
for(int i=0; i<2; i++){
rb[i] = new RadioButton(context);
//rb[i].setButtonDrawable(R.drawable.single_radio_chice);
rb[i].setId(i);
RadioGroup.LayoutParams params = new RadioGroup.LayoutParams(
0, LayoutParams.WRAP_CONTENT);
params.weight=1.0f;
params.setMargins(15, 0, 5, 10);
holder.group.addView(rb[i],params); //the RadioButtons are added to the radioGroup instead of the layout
}
rb[0].setText("Yes");
rb[1].setText("No");
row.setTag(holder);*/
} else {
holder = (ViewHolder) row.getTag();
}
holder.group.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
// TODO Auto-generated method stub
switch(checkedId){
case R.id.mRadio1:
data.get(position).setYes(true);
data.get(position).setNo(false);
break;
case R.id.mRadio2:
data.get(position).setNo(true);
data.get(position).setYes(false);
}
if(data.get(position).getYes()==true){
holder.yes.setChecked(true);
holder.no.setChecked(false);
}else if(data.get(position).getNo() == true){
holder.yes.setChecked(false);
holder.no.setChecked(true);
}else{
holder.yes.setChecked(false);
holder.yes.setChecked(false);
}
}
});
if(data.get(position).getYes()==true){
holder.yes.setChecked(true);
holder.no.setChecked(false);
}else if(data.get(position).getNo() == true){
holder.yes.setChecked(false);
holder.no.setChecked(true);
}else{
holder.yes.setChecked(false);
holder.yes.setChecked(false);
}
//RowObject option = data[position];
//holder.txtTitle.setText(option.title);
return row;
}
static class ViewHolder {
TextView txtTitle;
RadioGroup group;
RadioButton yes;
RadioButton no;
int position;
}}
谢谢，我真的很感谢你的帮助。