Java 在android中对listview进行排序
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sorting listview in android
提问by Mohsen fallahi
i am using this code to sort my list view in alphabetic order but it doesn't sort it a-z it sorts it z-a where is The problem?
我正在使用此代码按字母顺序对我的列表视图进行排序，但它没有对其进行排序 az 它对其进行排序 za 问题在哪里？
adapter.sort(new Comparator<String>() {
@Override
public int compare(String arg1, String arg0) {
return -arg1.compareTo(arg0);
}
});
采纳答案by Damien R.
Maybe the character '-' between returnand arg1.compareTo(arg0);?
也许字符“-”介于return和之间arg1.compareTo(arg0);？
回答by Hariharan
Remove the '-'between returnand arg1.compareTo(arg0);. That will do the trick for you..
取出'-'之间return和arg1.compareTo(arg0);。这会为你做的伎俩..
The following will sort in z-a(descending) order.
以下将按 za（降序）顺序排序。
adapter.sort(new Comparator<String>() {
@Override
public int compare(String arg1, String arg0) {
return arg0.compareTo(arg1);
}
});
For, a-z(ascending) :
对于, az(升序) :
adapter.sort(new Comparator<String>() {
@Override
public int compare(String arg1, String arg0) {
return arg1.compareTo(arg0);
}
});
回答by Ahmad Dwaik 'Warlock'
Use Collections.sort(yourArrayList)and then reload yourArrayList into the adapter.
使用Collections.sort(yourArrayList)然后将 yourArrayList 重新加载到适配器中。
here is some code supports my answer
这是一些代码支持我的答案
YourAdapter.java
你的适配器.java
public class YourAdapter extends BaseAdapter
{
protected ArrayList<String> data;
public void addSomeData()
{
data.add("oranj");
data.add("apple");
data.add("pineapple");
}
public YourAdapter sortData()
{
Collections.sort(data);
return this;
}
public int getCount()
{
return data.size();
}
public String getItem(int position)
{
return data.get(position);
}
public long getItemId(int position)
{
return position;
}
}
and in your activity
在你的活动中
list.setAdapter(new YourAdapter(this)); // not sorted list
list.setAdapter(new YourAdapter(this).sortData()); // sorted list
