问题描述
我有一个Android 的ListView 的项目有一个复选框。
I have an Android ListView whose items have a checkbox.
该复选框被默认选中。一旦选中应当从列表中删除。
The checkbox is checked by default. Once unchecked it should be removed from the list.
问题是， onCheckedChanged 被解雇两次：当我点击复选框取消选中它（与器isChecked 假）后，我删除的项目（以器isChecked 真）
The problem is that onCheckedChanged is being fired twice: when I tap the checkbox to uncheck it (with isChecked false) and after I remove the item (with isChecked true).
这是我的ArrayAdapter相关code：
This is the relevant code of my ArrayAdapter:
public View getView(final int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
convertView = mInflater.inflate(R.layout.item, parent, false);
holder = new ViewHolder();
holder.check = (CheckBox) convertView.findViewById(R.id.check);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
final Object item = this.getItem(position);
holder.check.setOnCheckedChangeListener(new CheckBox.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if (!isChecked) {
remove(item); // This somehow calls onCheckedChanged again
}
}
});
return convertView;
}
我是什么做错了吗？
What am I doing wrong?
推荐答案
我遇到同样的问题，这似乎是一个Android的bug这两次执行onCheckChanged方法。
I encountered the same problem, it seems to be an Android bug this twice execution of onCheckChanged method.
我的解决办法：执行 onClickListener ，而不是 onCheckedChangedListener 的。
My solution: implement onClickListener, instead of onCheckedChangedListener.
事情是这样的：
private final class CheckUpdateListener implements OnClickListener {
private Group parent;
private boolean isChecked;
private CheckUpdateListener(Group parent) {
this.parent = parent;
}
@Override
public void onClick(View box) {
this.isChecked = !parent.isChecked();
parent.setChecked(isChecked);
notifyDataSetChanged();
}
}
这篇关于复选框变化值的两倍的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！