我有一个使用 ArrayAdapter 构建的自定义 listView 。在 ListView 中，每个项目都包含 TextView 和 RadioGroup （包含4 RadioButton ）。我可以为每个列表项选择一个 RadioButton 。在 ListView 的底部，我有一个带按钮的页脚。我想要的是当我点击这样的按钮时获取所有数据：
name1 - 1
name2 - 3
name3 - 2
name4 - 3
...
第一栏 - 来自 TextView
的文字第二列 - 所选 RadioButton
的标记观点的原因：
public class MarksAdd extends ListActivity {
ArrayList<String> itemlist = new ArrayList<String>();
private Context context = null;
private ListView listView;
private Button BtnDone;
@Override
public void onCreate(Bundle saveInstanceState) {
super.onCreate(saveInstanceState);
setContentView(R.layout.marks_add);
Intent intent = getIntent();
int day = intent.getIntExtra("day", 0);
int month = intent.getIntExtra("month", 0);
int year = intent.getIntExtra("year", 0);
String dayStr = String.valueOf(day);
String monthStr = String.valueOf(month);
String yearStr = String.valueOf(year);
if (day != 0) {
if(dayStr.length()==1){
dayStr = "0"+dayStr;
}
if(monthStr.length()==1){
monthStr = "0"+monthStr;
}
yearStr = yearStr.substring(2);
String date = dayStr+"."+monthStr+"."+yearStr;
Toast.makeText(this, date, Toast.LENGTH_SHORT).show();
}
final ArrayAdapter<Model> adapter = new InteractiveArrayAdapter(this,
getModel());
listView = getListView();
LayoutInflater inflater = getLayoutInflater();
listView.addFooterView(inflater.inflate(R.layout.list_footer, null), null, false);
setListAdapter(adapter);
BtnDone = (Button) findViewById(R.id.markListBtn);
BtnDone.setOnClickListener( new View.OnClickListener() {
@Override
public void onClick(View v) {
//get Values ?????
}
});
}
private List<Model> getModel() {
List<Model> list = new ArrayList<Model>();
dbHelper sql = new dbHelper(this);
SQLiteDatabase db = sql.getWritableDatabase();
Cursor cursor = db.query(
PreferenceManager.getDefaultSharedPreferences(getBaseContext()).getString("group", ""), new String[]{
"Id", "Name"},
null, // The columns for the WHERE clause
null, // The values for the WHERE clause
null, // don't group the rows
null, // don't filter by row groups
"Name ASC" // The sort order
);
while (cursor.moveToNext()) {
// GET COLUMN INDICES + VALUES OF THOSE COLUMNS
int id = cursor.getInt(cursor.getColumnIndex("Id"));
String name = cursor.getString(cursor
.getColumnIndex("Name"));
list.add(get(name));
}
cursor.close();
// Initially select one of the items
return list;
}
private Model get(String question) {
return new Model(question);
}
}
ArrayAdapter：
public class InteractiveArrayAdapter extends ArrayAdapter<Model> {
private final List<Model> list;
private final Activity context;
public InteractiveArrayAdapter(Activity context, List<Model> list) {
super(context, R.layout.simple_list_item1_marks, list);
this.context = context;
this.list = list;
}
class ViewHolder {
TextView t = null;
RadioGroup group;
ViewHolder(View v) {
t = (TextView) v.findViewById(R.id.personName);
group = (RadioGroup) v.findViewById(R.id.myRgroup);
}
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View v = convertView;
ViewHolder holder = null;
if (v == null) {
LayoutInflater inflater = context.getLayoutInflater();
v = inflater.inflate(R.layout.simple_list_item1_marks, parent, false);
holder = new ViewHolder(v);
v.setTag(holder);
final View finalV = v;
holder.group
.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
public void onCheckedChanged(RadioGroup group,
int checkedId) {
Integer pos = (Integer) group.getTag(); // To identify the Model object i get from the RadioGroup with getTag()
// an integer representing the actual position
Model element = list.get(pos);
switch (checkedId) { //set the Model to hold the answer the user picked
case R.id.rb1:
element.current = Model.ANSWER_ONE_SELECTED;
break;
case R.id.rb2:
element.current = Model.ANSWER_TWO_SELECTED;
break;
case R.id.rb3:
element.current = Model.ANSWER_THREE_SELECTED;
break;
case R.id.rb4:
element.current = Model.ANSWER_FOUR_SELECTED;
break;
default:
element.current = Model.NONE; // Something was wrong set to the default
}
}
});
} else {
holder = (ViewHolder) v.getTag();
}
holder.group.setTag(position); // I passed the current position as a tag
holder.t.setText(list.get(position).question); // Set the question body
if (list.get(position).current != Model.NONE) {
RadioButton r = (RadioButton) holder.group.getChildAt(list
.get(position).current);
r.setChecked(true);
} else {
holder.group.clearCheck(); // This is required because although the Model could have the current
// position to NONE you could be dealing with a previous row where
// the user already picked an answer.
}
return v;
}
}
型号：
public class Model {
String question; // hold the question
int current = NONE; // hold the answer picked by the user, initial is NONE(see below)
public static final int NONE = 1000; // No answer selected
public static final int ANSWER_ONE_SELECTED = 0; // first answer selected
public static final int ANSWER_TWO_SELECTED = 1; // second answer selected
public static final int ANSWER_THREE_SELECTED = 2; // third answer selected
public static final int ANSWER_FOUR_SELECTED = 3; // forth answer selected
public Model(String question) {
this.question = question;
}
}
我根据that tutorial进行了一些更改。 Actualy我真的是开发中的新手，所以我要求你帮助我。对不起，如果我的问题不正确，我的英语不是很好。
非常感谢这里的任何帮助。
答案 0 :(得分：0)
首先想到的是迭代ListView并获取每行中的选中按钮。这实际上不起作用，因为ListView不会一直包含所有子节点。
相反，您应该在用户实际进行选择时存储选中的项目。然后，当您按下按钮时，您已经存储了所有数据，而不必迭代ListView。此外，如果您向上滚动列表，以这种方式保存当前选择将非常有用，因为您可以为getView()中的先前项目设置当前选中的单选按钮。
我们假设行布局中有这个：
<RadioGroup android:id="@+id/radio_group" ... >
<RadioButton android:id="@+id/radio_button_1" ... />
<RadioButton android:id="@+id/radio_button_2" ... />
<RadioButton android:id="@+id/radio_button_3" ... />
<RadioButton android:id="@+id/radio_button_4" ... />
</RadioGroup>
在你的适配器的getView()中，给适配器本身定义的OnCheckedChangedListener一个{（1}}（所以你有一个OnCheckedChangedListener而不是每行一个）。使用列表项的位置标记RadioGroup，以便您可以在回调中区分它。
@Override
public View getView(int position, View convertView, ViewGroup parent) {
...
Model model = getItem(position);
int checkedId = ... //figure out checked id from model
viewHolder.group.check(checkedId);
viewHolder.group.setTag(position);
viewHolder.group.setOnCheckedChangedListener(checkChangedListener);
...
}
private OnCheckedChangedListener checkChangedListener = new OnCheckedChangedListener() {
@Override
public void onCheckChanged(RadioGroup group, int checkId) {
Object tag = group.getTag();
if (!(tag instanceof Integer)) {
// you have a bug. Fix it!
return;
}
int position = (Integer) tag;
Model model = getItem(position);
switch(checkedId) {
case R.id.radio_button_1:
model.setCurrent(Model.ANSWER_ONE_SELECTED); break;
case R.id.radio_button_1:
model.setCurrent(Model.ANSWER_TWO_SELECTED); break;
case R.id.radio_button_1:
model.setCurrent(Model.ANSWER_THREE_SELECTED); break;
case R.id.radio_button_1:
model.setCurrent(Model.ANSWER_FOUR_SELECTED); break;
}
}
};
现在您只需要从适配器获取模型列表。