在列表复选框随机得到选中/取消当我翻阅。安卓2.3 [英] checkboxes in the List randomly get checked/unchecked when i scroll through. android 2.3
问题描述
我用我的自定义适配器。有一个复选框,并在每一行文本视图。 但我有一个问题。有在列表中比其适合屏幕上的数字更多的项目。
所以,当我检查所有的复选框的屏幕上,然后向下滚动。该自动获得听之任之。
当我向上滚动,又有些乱复选框得到检查。
我知道,在getView()名单正在一次又一次地刷新和孤单的位置的问题。 但不知道该解决方案。
我使用的是布尔数组来跟踪都试过了。但二硝基甲苯知道如何正确地做到这一点。
cb.setOnCheckedChangeListener(新OnCheckedChangeListener(){
@覆盖
公共无效onCheckedChanged(CompoundButton buttonView,
布尔器isChecked){
itemChecked [指数] =器isChecked;
}
});
cb.setChecked(itemChecked [指数]);
能否请你张贴一些code段,并详细解释。我累了自去年2周寻找这样......由于事先..
公开查看getChildView(最终诠释groupPosition,
最终诠释childPosition,布尔isLastChild,查看convertView,
ViewGroup中父){
最后ViewHolder持有人;
//如果(convertView == NULL){
持有人=新ViewHolder();
convertView = mInflater.inflate(
R.layout.expandableinner_custom_row,NULL);
holder.textView =(TextView中)convertView
.findViewById(R.id.textView);
holder.checkBox =(复选框)convertView
.findViewById(R.id.checkBox);
字符串str = getChild(groupPosition,childPosition)的ToString();
holder.textView.setText(STR);
布尔[] boolArr = SMSActivity.maintaingState.get(字符串
.valueOf(groupPosition));
Log.i(BOOLARRAYSIZE,将String.valueOf(boolArr.length));
Log.i(布尔,
将String.valueOf(boolArr [childPosition] +GrpPosition:
+ groupPosition +ChildPosition:
+ childPosition));
如果(boolArr [childPosition]){
holder.checkBox.setChecked(真正的);
} 其他 {
holder.checkBox.setChecked(假);
}
holder.checkBox
.setOnCheckedChangeListener(新OnCheckedChangeListener(){
@覆盖
公共无效onCheckedChanged(
CompoundButton buttonView,
布尔器isChecked){
// TODO自动生成方法存根
布尔[] boolArr = SMSActivity.maintaingState
获得(将String.valueOf(groupPosition));
boolArr [childPosition] =器isChecked; //(对象)
Log.i(grpPosition
将String.valueOf(childPosition));
Log.i(childPosition
将String.valueOf(groupPosition));
SMSActivity.maintaingState.remove(字符串
.valueOf(groupPosition));
SMSActivity.maintaingState.put(
将String.valueOf(groupPosition)
boolArr);
Log.i(布尔,弦乐
.valueOf(boolArr [childPosition]
+GrpPosition:
+ groupPosition
+ChildPosition:
+ childPosition));
}
});
convertView.setTag(保持器);
返回convertView;
}
I am using my custom adapter. There is a checkbox and a text view in each row. But i have a problem. There are more items in the list than the number which fits on the screen.
So when i check any of the checkboxes on the screen and scroll down. The automatically get unchecked.
When i scroll up again some random checkboxes get checked.
I know that in getView() list is being refreshed again and again and theres an issue of the position. But dont know the solution.
I have tried using a boolean array to keep a track. but dnt know how to do it properly.
cb.setOnCheckedChangeListener(new OnCheckedChangeListener(){
@Override
public void onCheckedChanged(CompoundButton buttonView,
boolean isChecked) {
itemChecked[index]=isChecked;
}
});
cb.setChecked(itemChecked[index]);
Can you please post some code snippet and explain in detail. i am tired of searching this since last 2weeks... thanks in advance,..
public View getChildView(final int groupPosition,
final int childPosition, boolean isLastChild, View convertView,
ViewGroup parent) {
final ViewHolder holder;
//if (convertView == null) {
holder = new ViewHolder();
convertView = mInflater.inflate(
R.layout.expandableinner_custom_row, null);
holder.textView = (TextView) convertView
.findViewById(R.id.textView);
holder.checkBox = (CheckBox) convertView
.findViewById(R.id.checkBox);
String str = getChild(groupPosition, childPosition).toString();
holder.textView.setText(str);
Boolean[] boolArr = SMSActivity.maintaingState.get(String
.valueOf(groupPosition));
Log.i("BOOLARRAYSIZE ", String.valueOf(boolArr.length));
Log.i("Boolean",
String.valueOf(boolArr[childPosition] + "GrpPosition: "
+ groupPosition + "ChildPosition: "
+ childPosition));
if (boolArr[childPosition]) {
holder.checkBox.setChecked(true);
} else {
holder.checkBox.setChecked(false);
}
holder.checkBox
.setOnCheckedChangeListener(new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(
CompoundButton buttonView,
boolean isChecked) {
// TODO Auto-generated method stub
Boolean[] boolArr = SMSActivity.maintaingState
.get(String.valueOf(groupPosition));
boolArr[childPosition] = isChecked;// (object)
Log.i("grpPosition",
String.valueOf(childPosition));
Log.i("childPosition",
String.valueOf(groupPosition));
SMSActivity.maintaingState.remove(String
.valueOf(groupPosition));
SMSActivity.maintaingState.put(
String.valueOf(groupPosition),
boolArr);
Log.i("Boolean", String
.valueOf(boolArr[childPosition]
+ " GrpPosition: "
+ groupPosition
+ "ChildPosition: "
+ childPosition));
}
});
convertView.setTag(holder);
return convertView;
}
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