我检查所有类似问题的主题，但我仍然坚持死点。我有一个列表视图与联系人列表，但当我向下滚动并向上滚动列表视图时，不保存我的选择状态。所有复选框都设置为false。当我调试时，我看到，当我滚动listview时，我的onClickListener认为复选框已签名并重置此项。我做所有事情，其他数组与位置布尔等，我仍然不知道该怎么做:(我将非常感谢任何帮助：）
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
readContacts();
Contact_Database dbhandler = new Contact_Database(
getApplicationContext(), null, null, 1);
numbers.addAll( dbhandler.getAllNumbers());
System.out.println("onCreate");
ListView lv = getListView();
registerForContextMenu(lv);
lv.setTextFilterEnabled(true);
lv.clearChoices();
MyAdapter adapter = (new MyAdapter(this, R.layout.contact_list_sms, contacts));
adapter.notifyDataSetChanged();
lv.setAdapter(adapter);
}
/**
* When I destroy intent i send request to database, faster!
*/
@Override
protected void onDestroy() {
super.onDestroy();
for (int i = 0; i < numbers.size(); ++i)
System.out.println("@@@@" + numbers.get(i));
swap_contacts();
}
class MyAdapter extends ArrayAdapter<Contact> {
LayoutInflater inflat;
public MyAdapter(Context context, int textViewResourceId,
ArrayList<Contact> objects) {
super(context, textViewResourceId, objects);
inflat = LayoutInflater.from(context);
System.out.println("LOLLLLL");
notifyDataSetChanged();
}
@Override
public int getItemViewType(int position) {
return (position == this.getCount() - 1) ? 1 : 0;
}
@Override
public int getViewTypeCount() {
return 2;
}
// if that contact exist in database? numbers, in onCreate method
// i init this with saved position from databse
private boolean exist(String x) {
for (int i = 0; i < numbers.size(); i++)
if (numbers.get(i).compareTo(x) == 0)
return true;
return false;
}
@SuppressLint("NewApi")
@Override
public View getView(int position, View convertView, ViewGroup parent) {
System.out.println("ROWS !!! ->" + numbers.size());
ViewHolder holder = null;
if (convertView == null) {
holder = new ViewHolder();
convertView = inflat.inflate(R.layout.contact_row, null);
holder.textView1 = (TextView) convertView
.findViewById(R.id.name);
holder.textView2 = (TextView) convertView
.findViewById(R.id.number);
holder.on_off = (CheckBox) convertView
.findViewById(R.id.enable);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
Contact it = contacts.get(position);
Log.v("XXX", holder.toString());
if (it != null) {
holder.textView1.setText(contacts.get(position).name);
holder.textView2.setText(contacts.get(position).phone);
// update state of checbox from database
if (exist(contacts.get(position).phone))
holder.on_off.setChecked(true);
else
holder.on_off.setChecked(false);
}
final int element_position = position;
holder.on_off
.setOnCheckedChangeListener(new OnCheckedChangeListener() {
// update list when we click on it
@Override
public void onCheckedChanged(CompoundButton buttonView,
boolean isChecked) {
String nr_telefonu = contacts.get(element_position).phone;
if (isChecked) {
numbers.add(nr_telefonu);
} else {
numbers.remove(nr_telefonu);
}
}
});
return convertView;
}
@Override
public Contact getItem(int position) {
return contacts.get(position);
}
private class ViewHolder {
TextView textView1, textView2;
CheckBox on_off;
public String toString() {
return "-";
}
}
}
答案 0 :(得分：2)
列表在滚动时不保存状态，因为每次为行项创建新对象。所以你需要在Pojo类（Setter和getter）的帮助下显式保存CheckBox的状态。
在getView（）方法中，您需要检查每个复选框的值。@Override
public View getView(int position, View convertView, ViewGroup parent) {
////////////////////
并且在setOnCheckedChangeListener上你需要保存复选框的状态
holder.on_off
.setOnCheckedChangeListener(new OnCheckedChangeListener() {
// update list when we click on it
@Override
public void onCheckedChanged(CompoundButton buttonView,
boolean isChecked) {
// need to save the state
有关详细信息，请参阅以下博客
http://amitandroid.blogspot.in/2013/03/android-listview-with-checkbox-and.html
您可以根据自己的要求进行更改。
答案 1 :(得分：0)
感谢您的回答:)我为每个复选框按钮创建一个带状态的数组stan。明天我将尝试重建我所有的课程，就像博客上的列表一样，这可能对我有帮助。
但是当我这样做时： 保存状态：
holder.on_off
.setOnCheckedChangeListener(new OnCheckedChangeListener() {
// update list when we click on it
// this.setChecked(stan[position]);
@Override
public void onCheckedChanged(CompoundButton buttonView,
boolean isChecked) {
String nr_telefonu = p.get(element_position).phone;
buttonView.setChecked(stan[element_position]);
stan[element_position] = isChecked;
}
});
刷新按钮状态
if (it != null) {
holder.textView1.setText(contacts.get(position).name);
holder.textView2.setText(contacts.get(position).phone);
// update state of checbox from database
holder.on_off.setChecked(stan[position]);
}
我仍然站在死点，没有任何改变
答案 2 :(得分：0)
我已经在下面找到了解决这个问题的方法，我花了很多时间找到它并且对我有用！
public class RowAdapter extends ArrayAdapter<Rows> {
Context context;
int layoutResourceId;
ArrayList<Rows> data;
boolean[] checkBoxState;
RowHolder rowHolder;
public RowAdapter(Context context, int layoutResourceId, ArrayList<Rows> data) {
super(context, layoutResourceId, data);
this.layoutResourceId = layoutResourceId;
this.context = context;
this.data = data;
checkBoxState = new boolean[data.size()];
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
View row = convertView;
RowHolder holder = null;
if(row == null)
{
LayoutInflater inflater = ((Activity)context).getLayoutInflater();
row = inflater.inflate(layoutResourceId, parent, false);
holder = new RowHolder();
holder.textView1 = (TextView)row.findViewById(R.id.textView1);
holder.textView2 = (TextView)row.findViewById(R.id.textView2);
holder.textView3 = (TextView)row.findViewById(R.id.textView3);
holder.textView4 = (TextView)row.findViewById(R.id.textView4);
holder.checkBox=(CheckBox) row.findViewById(R.id.checkBox1);
row.setTag(holder);
}
else{
holder = (RowHolder)row.getTag();
}
Rows rows = data.get(position);
holder.textView1.setText(rows.address);
holder.textView2.setText(rows.tenancy);
holder.textView3.setText(rows.location);
holder.textView4.setText(rows.name);
holder.checkBox.setChecked(checkBoxState[position]);
holder.checkBox.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
if(((CheckBox)v).isChecked())
checkBoxState[position]=true;
else
checkBoxState[position]=false;
}
});
return row;
}
static class RowHolder
{
TextView textView1;
TextView textView2;
TextView textView3;
TextView textView4;
CheckBox checkBox;
}
}