我正在 ListView 中实现 CheckBox。我面临的问题是，每当我们检查另一个 CheckBox 时，都会自动检查 CheckBox 的最后一个位置。
这是我实现的适配器:
private class ListAdapter_cb extends BaseAdapter {
private LayoutInflater inflater;
private ViewHolder vh;
CheckboxesPOJO cc = new CheckboxesPOJO();
List<CheckboxesPOJO> array = new ArrayList<CheckboxesPOJO>();
boolean[] checkedState;
private Context context;
boolean[] checkboolean;
int pos;
List<String> answers;
public ListAdapter_cb(Context c, int early_pos, List<CheckboxesPOJO> arraylist) {
this.array = arraylist;
this.context = c;
this.pos = early_pos;
checkboolean = new boolean[array.size()];
}
@Override
public View getView(final int position, View convertview, ViewGroup parent) {
final CheckboxesPOJO obj_bean_downloadplus = array.get(position);
if (convertview == null) {
inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertview = inflater.inflate(R.layout.element_cb, parent, false);
vh = new ViewHolder();
vh.answer_checkbox = (CheckBox) convertview.findViewById(R.id.answer_checkbox);
convertview.setTag(vh);
} else {
vh = (ViewHolder) convertview.getTag();
}
vh.answer_checkbox.setText(obj_bean_downloadplus.getItsanswer() + "");
vh.answer_checkbox.setId(position);
vh.answer_checkbox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
{
if ((buttonView.isChecked())) {
vh.answer_checkbox.setChecked(true);
checkboolean[position] = true;
checkedList.add(obj_bean_downloadplus.getNumber() + ":" + obj_bean_downloadplus.getItsanswer());
Log.v("", TAG + "obj_bean_downloadplus >> " + obj_bean_downloadplus.getNumber() + ":" + obj_bean_downloadplus.getItsanswer());
Log.v("", TAG + "obj_bean_downloadplus >> " + checkedList.toString());
} else {
vh.answer_checkbox.setChecked(false);
checkboolean[position] = false;
checkedList.remove(obj_bean_downloadplus.getNumber() + ":" + obj_bean_downloadplus.getItsanswer());
Log.v("", TAG + "obj_bean_downloadplus >> " + obj_bean_downloadplus.getNumber() + ":" + obj_bean_downloadplus.getItsanswer());
Log.v("", TAG + "obj_bean_downloadplus >> " + checkedList.toString());
}
}
}
});
vh.answer_checkbox.setChecked(checkboolean[position]);
return convertview;
}
public int getCount() {
return array.size();
}
@Override
public Object getItem(int position) {
return null;
}
@Override
public long getItemId(int position) {
return 0;
}
}
这会导致 checkbox 的最后一个位置自动选中，甚至将其答案保存在 checkedlist 中，我只需要发送选中的内容。
///======单选按钮=====// 我在 radio 组中面临同样的问题。 请找到下面的 radio 组适配器:
private class RadioGroupAdapter extends BaseAdapter {
List<SubquesPOJO> arraylist_downloadplus = new ArrayList<SubquesPOJO>();
Context context;
int layoutResourceId;
int early_pos;
List<String> arraylist_downloadplusanswer = new ArrayList<String>();
String[] ansarray;
private SparseBooleanArray mSparseBooleanArray_radio;
public RadioGroupAdapter(Context context, int early_pos, int layoutResourceId, List<SubquesPOJO> arraylist_downloadplus1, List<String> arraylist_downloadplus2) {
this.layoutResourceId = layoutResourceId;
this.context = context;
this.early_pos = early_pos;
arraylist_downloadplus.clear();
arraylist_downloadplusanswer.clear();
arraylist_downloadplus = arraylist_downloadplus1;
arraylist_downloadplusanswer = arraylist_downloadplus2;
ansarray = new String[arraylist_downloadplus.size()];
mSparseBooleanArray_radio = new SparseBooleanArray();
Log.v("", TAG + "=arraylist_downloadplus.size()=" + arraylist_downloadplus.size());
}
@SuppressLint("ViewHolder")
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
final SubquesPOJO obj_bean_downloadplus = arraylist_downloadplus.get(position);
View row = convertView;
MatrixHolder holder = null;
if (row == null) {
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
row = inflater.inflate(layoutResourceId, parent, false);
holder = new MatrixHolder();
holder.txtTitle = (TextView) row.findViewById(R.id.txt_misssion);
holder.group = (RadioGroup) row.findViewById(R.id.answer_radio_group);
holder.rb2 = new RadioButton[arraylist_downloadplusanswer.size()];
for (int j = 0; j < arraylist_downloadplusanswer.size(); j++) {
holder.rb2[j] = new RadioButton(context);
RadioGroup.LayoutParams params = new RadioGroup.LayoutParams(RadioGroup.LayoutParams.WRAP_CONTENT, RadioGroup.LayoutParams.WRAP_CONTENT);
params.setMargins(0, 0, 20, 0);
holder.group.addView(holder.rb2[j], params);
Log.v("", "=ansarray[position]=" + ansarray[position]);
}
row.setTag(holder);
} else {
holder = (MatrixHolder) row.getTag();
}
holder.txtTitle.setText(obj_bean_downloadplus.getTitle());
for (int j = 0; j < holder.rb2.length; j++) {
holder.rb2[j].setText(j + 1 + "");
holder.rb2[j].setId(j);
holder.rb2[j].setTag(j + 1);
holder.rb2[j].setTextColor(getResources().getColor(R.color.text_grey_dark));
// holder.rb2[j].setOnCheckedChangeListener(new CheckListner_radio(obj_bean_downloadplus, holder.rb2[j]));
/* if (obj_bean_downloadplus.isSelected()) {
holder.rb2[j].setChecked(true);
} else {
holder.rb2[j].setChecked(false);
}*/
holder.rb2[j].setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String ansId = v.getTag().toString();
ansarray[position] = "\"" + (position + 1) + ":" + ansId + "\"";
Log.v("", "=position:ansId=" + ansarray[position]);
}
});
// mSparseBooleanArray_radio.put((Integer) holder.rb2[j].getTag(), holder.rb2[j].isChecked());
}
return row;
}
class CheckListner_radio implements CompoundButton.OnCheckedChangeListener {
private RadioButton checkbox;
SubquesPOJO data;
public CheckListner_radio(SubquesPOJO data, RadioButton checkbox) {
this.data = data;
this.checkbox = checkbox;
}
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if (isChecked) {
checkbox.setChecked(true);
String ansId = buttonView.getTag().toString();
ansarray[position] = "\"" + (position + 1) + ":" + ansId + "\"";
Log.v("", "=position:ansId=" + ansarray[position]);
data.SetIsSelected(true);
}/* else {
checkbox.setChecked(false);
data.SetIsSelected(false);
}*/
mSparseBooleanArray_radio.put((Integer) buttonView.getTag(), isChecked);
}
}
@Override
public int getCount() {
return arraylist_downloadplus.size();
}
@Override
public Object getItem(int position) {
return null;
}
@Override
public long getItemId(int position) {
return 0;
}
}
有些行被注释了，我已经实现了与复选框相同的功能，但它不起作用。
请帮忙。
最佳答案
private class ListAdapter_cb extends BaseAdapter {
private LayoutInflater inflater;
private ViewHolder vh;
CheckboxesPOJO cc = new CheckboxesPOJO();
List<CheckboxesPOJO> array = new ArrayList<CheckboxesPOJO>();
boolean[] checkedState;
private Context context;
boolean[] checkboolean;
private SparseBooleanArray mSparseBooleanArray;
int pos;
List<String> answers;
public ListAdapter_cb(Context c, int early_pos, List<CheckboxesPOJO> arraylist) {
this.array = arraylist;
this.context = c;
this.pos = early_pos;
mSparseBooleanArray = new SparseBooleanArray();
checkboolean = new boolean[array.size()];
}
@Override
public View getView(final int position, View convertview, ViewGroup parent) {
final CheckboxesPOJO obj_bean_downloadplus = array.get(position);
if (convertview == null) {
inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertview = inflater.inflate(R.layout.element_cb, parent, false);
vh = new ViewHolder();
vh.answer_checkbox = (CheckBox) convertview.findViewById(R.id.answer_checkbox);
convertview.setTag(vh);
} else {
vh = (ViewHolder) convertview.getTag();
}
vh.answer_checkbox.setText(obj_bean_downloadplus.getItsanswer() + "");
vh.answer_checkbox.setId(position);
vh.answer_checkbox.setOnCheckedChangeListener(new CheckListener());
vh.answer_checkbox.setTag(position);
vh.answer_checkbox.setChecked(checkboolean[position]);
return convertview;
}
public ArrayList<CheckboxesPOJO> getCheckedItems() {
ArrayList<CheckboxesPOJO> mTempArry = new ArrayList<CheckboxesPOJO>();
for (int i = 0; i < mList.size(); i++) {
if (mSparseBooleanArray.get(i)) {
CheckboxesPOJO data = mList.get(i);
mTempArry.add(data);
}
}
return mTempArry;
}
class CheckListener implements OnCheckedChangeListener {
private CheckBox checkbox;
CheckboxesPOJO data;
public CheckListener(CheckboxesPOJO data, CheckBox checkbox) {
this.data = data;
this.checkbox = checkbox;
}
@Override
public void onCheckedChanged(CompoundButton buttonView,
boolean isChecked) {
if (isChecked) {
checkbox.setChecked(true);
checkedList.add(data.getNumber() + ":" + data.getItsanswer());
Log.v("", TAG + "data >> " + data.getNumber() + ":" + data.getItsanswer());
Log.v("", TAG + "data >> " + checkedList.toString());
} else {
checkbox.setChecked(false);
checkedList.remove(data.getNumber() + ":" + data.getItsanswer());
Log.v("", TAG + "data >> " + data.getNumber() + ":" + data.getItsanswer());
Log.v("", TAG + "data >> " + checkedList.toString());
}
mSparseBooleanArray.put((Integer) buttonView.getTag(), isChecked);
}
}
public int getCount() {
return array.size();
}
@Override
public Object getItem(int position) {
return null;
}
@Override
public long getItemId(int position) {
return 0;
}
}
关于android - ListView 中的复选框自动检查最后位置的问题，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/35427432/