安卓工作室排序列表视图包含一个文本视图,其中我显示距离和距离是在运行时计算,即不是从arraylist计算 [英] Android studio sorting listview that contain a textview in which I m showing distance and distance is calculating at runtime ie not from arraylist
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问题描述
Android工作室排序列表视图,其中包含一个textview,其中显示距离和距离是在运行时计算,即不是来自arraylist或Sqlite,我想根据距离对列表视图进行排序,并限制listview只显示50项
我尝试过:
Android studio sorting listview that contain a textview in which i m showing distance and distance is calculating at runtime ie not from arraylist or Sqlite , I want to sort list view based on distance and also restrict listview to show only 50 items
What I have tried:
list.setAdapter(new BaseAdapter() {
// @Override
@Override
public View getView(int arg0, View arg1, ViewGroup arg2) {
View v = getLayoutInflater().inflate(R.layout.single_row, null);
TextView i,n,e,p;
// i=(TextView)v.findViewById(R.id.textView1);
n=(TextView)v.findViewById(R.id.textView2);
e=(TextView)v.findViewById(R.id.textView3);
p=(TextView)v.findViewById(R.id.textView6);
Employee emp = employees.get(arg0);
// i.setText(emp.getId());
e.setText(emp.getAddress());
n.setText(emp.getName());
//new code for lat distance
double lat =Double.parseDouble(emp.getLat());
double log = Double.parseDouble(emp.getLog());
/* Intent mIntent = getIntent();
String flatvalue = mIntent.getStringExtra("flat");
String flogvalue = mIntent.getStringExtra("flog");
double flat =Double.parseDouble(flatvalue.toString());
double flog = Double.parseDouble(flogvalue.toString());*/
if(gps.canGetLocation()){
double flat = gps.getLatitude();
double flog = gps.getLongitude();
double dis = geoCoordToMeter(flat, flog, lat,log);
int distnace =(int) dis;
p.setText(String.valueOf(distnace) + " km" );
}
return v;
}
推荐答案
将您的元素添加到列表< t>,然后使用收集(Java Platform SE 6) [ ^ ]。排序在该列表中。然后,您可以提取所需的项目并将其添加到Listview,或使用派生列表作为源。
Add your elements to a List<t>, then use Collections (Java Platform SE 6)[^].Sort on that list. You can then extract the items you want and add them to the Listview, or use a derived list as source.
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