I am creating an app that requires a ListView with an undetermined number of elements, each of which has a timer that counts down from a variable number. I am able to successfully make one of them count down, but I can't figure out how to include a timer in each element of the ListView.
I am currently using a CountDownTimer (make sure to capitalize the D if copying from the website, they have it wrong).
Any code or sources to point me in the right direction are much appreciated.
Here is my current EventAdapter class, it sets the text displayed in each ListView element's TextView. What I need to do is make the TextView count down every second. Since each element of the ListView is displaying something different, I suppose I need a way of differentiating each element.
I could just update the whole list every second, but there are other elements I have not included such as images loaded from the internet that it would be impractical to refresh every second.
private class EventAdapter extends ArrayAdapter<Event>
{
private ArrayList<Event> items;
public EventAdapter(Context context, int textViewResourceId, ArrayList<Event> items) {
super(context, textViewResourceId, items);
this.items = items;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View v = convertView;
if (v == null) {
LayoutInflater vi = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
v = vi.inflate(R.layout.row, null);
}
Event e = items.get(position);
if (e != null) {
TextView tv = (TextView) v.findViewById(R.id.text);
if (tv != null)
tv.setText(e.getName());
}
return v;
}
}
This is an example of the way I do it and it works perfect:
public class TestCounterActivity extends ListActivity
{
TestAdapter adapter;
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
// Example values
ArrayList<Date> values = new ArrayList<Date>();
values.add(new Date(1482464366239L));
values.add(new Date(1480464366239L));
values.add(new Date(1470464366239L));
values.add(new Date(1460464366239L));
values.add(new Date(1450464366239L));
values.add(new Date(1440464366239L));
values.add(new Date(1430464366239L));
values.add(new Date(1420464366239L));
values.add(new Date(1410464366239L));
values.add(new Date(1490464366239L));
adapter = new TestAdapter(this, values);
setListAdapter(adapter);
}
@Override
protected void onStop()
{
super.onStop();
// Dont forget to cancel the running timers
adapter.cancelAllTimers();
}
}
And this is the adapter
public class TestAdapter extends ArrayAdapter<Date>
{
private final Activity context;
private final List<Date> values;
private HashMap<TextView,CountDownTimer> counters;
static class TestViewHolder
{
public TextView tvCounter;
}
public TestAdapter(Activity context, List<Date> values)
{
super(context, R.layout.test_row, values);
this.context = context;
this.values = values;
this.counters = new HashMap<TextView, CountDownTimer>();
}
@Override
public View getView(int position, View convertView, ViewGroup parent)
{
View rowView = convertView;
if(rowView == null)
{
LayoutInflater inflater = context.getLayoutInflater();
rowView = inflater.inflate(R.layout.test_row, null);
final TestViewHolder viewHolder = new TestViewHolder();
viewHolder.tvCounter = (TextView) rowView.findViewById(R.id.tvCounter);
rowView.setTag(viewHolder);
}
TestViewHolder holder = (TestViewHolder) rowView.getTag();
final TextView tv = holder.tvCounter;
CountDownTimer cdt = counters.get(holder.tvCounter);
if(cdt!=null)
{
cdt.cancel();
cdt=null;
}
Date date = values.get(position);
long currentDate = Calendar.getInstance().getTime().getTime();
long limitDate = date.getTime();
long difference = limitDate - currentDate;
cdt = new CountDownTimer(difference, 1000)
{
@Override
public void onTick(long millisUntilFinished)
{
int days = 0;
int hours = 0;
int minutes = 0;
int seconds = 0;
String sDate = "";
if(millisUntilFinished > DateUtils.DAY_IN_MILLIS)
{
days = (int) (millisUntilFinished / DateUtils.DAY_IN_MILLIS);
sDate += days+"d";
}
millisUntilFinished -= (days*DateUtils.DAY_IN_MILLIS);
if(millisUntilFinished > DateUtils.HOUR_IN_MILLIS)
{
hours = (int) (millisUntilFinished / DateUtils.HOUR_IN_MILLIS);
}
millisUntilFinished -= (hours*DateUtils.HOUR_IN_MILLIS);
if(millisUntilFinished > DateUtils.MINUTE_IN_MILLIS)
{
minutes = (int) (millisUntilFinished / DateUtils.MINUTE_IN_MILLIS);
}
millisUntilFinished -= (minutes*DateUtils.MINUTE_IN_MILLIS);
if(millisUntilFinished > DateUtils.SECOND_IN_MILLIS)
{
seconds = (int) (millisUntilFinished / DateUtils.SECOND_IN_MILLIS);
}
sDate += " "+String.format("%02d",hours)+":"+String.format("%02d",minutes)+":"+String.format("%02d",seconds);
tv.setText(sDate.trim());
}
@Override
public void onFinish() {
tv.setText("Finished");
}
};
counters.put(tv, cdt);
cdt.start();
return rowView;
}
public void cancelAllTimers()
{
Set<Entry<TextView, CountDownTimer>> s = counters.entrySet();
Iterator it = s.iterator();
while(it.hasNext())
{
try
{
Map.Entry pairs = (Map.Entry)it.next();
CountDownTimer cdt = (CountDownTimer)pairs.getValue();
cdt.cancel();
cdt = null;
}
catch(Exception e){}
}
it=null;
s=null;
counters.clear();
}
}