我正在使用列表视图，其中有一个向上投票按钮。当用户点击向上投票按钮时，它将变为黄色并增加其下的分数。这按预期工作，但是当我向下滚动列表视图时，我注意到其他向上投票按钮被突出显示（意味着它们也只是＆＃34;按下＆＃34;），即使它们最近被按下了。我假设这是回收细胞的问题。此外，当我在列表视图中递增第一行并向下滚动时，当我向上滚动时，该数字将恢复为原始数字。任何帮助，将不胜感激。这里有什么可能导致我的问题吗？这是我的代码：
class MyAdapterListings extends BaseAdapter
{
Globals g;
private JSONArray dataArray;
private Activity activity;
private static LayoutInflater inflater = null;
public MyAdapterListings(JSONArray jsonArray, Activity a)
{
g = Globals.getInstance();
dataArray = jsonArray;
activity = a;
inflater = (LayoutInflater)activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
@Override
public int getCount()
{
return dataArray.length();
}
@Override
public Object getItem(int position)
{
return position;
}
@Override
public long getItemId(int position)
{
return position;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent)
{
final ListCell cell;
Button theUpVoteButton = null;
Button theDownVoteButton = null;
if(convertView == null)
{
convertView = inflater.inflate(R.layout.daily_layout, null);
cell = new ListCell();
TextView imageButtonText = (TextView)convertView.findViewById(R.id.imageButtonText);
theUpVoteButton = (Button)convertView.findViewById(R.id.upVoteButton);
theDownVoteButton = (Button)convertView.findViewById(R.id.downVoteButton);
Button imageLinkButton = (Button)convertView.findViewById(R.id.imageButton);
Button reportButton = (Button)convertView.findViewById(R.id.reportButton);
cell.nickname = (TextView)convertView.findViewById(R.id.nicknameTextView);
cell.squeal = (TextView)convertView.findViewById(R.id.messageTextView);
cell.timeSincePosted = (TextView)convertView.findViewById(R.id.timePostedTextView);
cell.upVotes = (TextView)convertView.findViewById(R.id.scoreCountTextView);
final Button finalTheUpVoteButton = theUpVoteButton;
final Button finalTheDownVoteButton = theDownVoteButton;
theUpVoteButton.setOnClickListener(new View.OnClickListener()
{
@Override
public void onClick(View v)
{
finalTheUpVoteButton.setBackgroundResource(R.drawable.up_vote_button_gold);
finalTheDownVoteButton.setBackgroundResource(R.drawable.image_button);
cell.upVotes.setText("" + (Integer.parseInt(cell.upVotes.getText().toString())+1));
System.out.println("squealID = " + cell.squealID);
System.out.println("byUserID = " + cell.byUserID);
new IncrementUpVote(cell.squealID, cell.byUserID).execute();
}
});
theDownVoteButton.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View v)
{
System.out.println(position + " DOWN VOTE BUTTON PRESSED!!!");
}
});
imageLinkButton.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View v)
{
System.out.println(position + " IMAGE/LINK BUTTON PRESSED!!!");
Intent browserIntent = new Intent(Intent.ACTION_VIEW, Uri.parse(cell.link));
activity.startActivity(browserIntent);
}
});
reportButton.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View v)
{
System.out.println(position + " REPORT BUTTON PRESSED!!!");
}
});
convertView.setTag(cell);
}
else
{
cell = (ListCell)convertView.getTag();
}
try
{
JSONObject jsonObject = dataArray.getJSONObject(position);
cell.squealID = jsonObject.getString("ID");
cell.nickname.setText(jsonObject.getString("nickname"));
cell.link = jsonObject.getString("link");
cell.squeal.setText(jsonObject.getString("message"));
cell.byUserID = jsonObject.getString("byUserID");
cell.timeSincePosted.setText(getTimeSincePostedLabel(jsonObject.getString("TIME_TO_SEC(TIMEDIFF(NOW(), timePosted))")));
cell.upVotes.setText(jsonObject.getString("upVotes"));
cell.comments = jsonObject.getString("comments");
cell.count = jsonObject.getString("count");
cell.reportsCount = jsonObject.getString("reportsCount");
if(Integer.parseInt(cell.count) > 0) // User already selected upvote or downvote
{
if (theUpVoteButton != null)
theUpVoteButton.setVisibility(View.GONE);
if(theDownVoteButton != null)
theDownVoteButton.setVisibility(View.GONE);
}
}
catch (JSONException e)
{
e.printStackTrace();
}
return convertView;
}
public String getTimeSincePostedLabel(String secondsString)
{
int num_seconds = Integer.parseInt(secondsString);
int days = num_seconds / (60 * 60 * 24);
num_seconds -= days * (60 * 60 * 24);
int hours = num_seconds / (60 * 60);
num_seconds -= hours * (60 * 60);
int minutes = num_seconds / 60;
if(days > 0)
{
return (days + " d");
}
else if(hours > 0)
{
return (hours + " h");
}
else if(minutes > 0)
{
return (minutes + " m");
}
return (num_seconds + " s");
}
private class ListCell
{
private String squealID;
private TextView nickname;
private String link;
private TextView squeal;
private String byUserID;
private TextView timeSincePosted;
private TextView upVotes;
private String comments;
private String count;
private String reportsCount;
}
public class IncrementUpVote extends AsyncTask<String, Void, Void>
{
String squealID;
String byUserID;
public IncrementUpVote(String squealID, String byUserID)
{
this.squealID = squealID;
this.byUserID = byUserID;
}
@Override
protected Void doInBackground(String... params)
{
try
{
HttpClient httpclient = new DefaultHttpClient();
String phpRequestLink = null;
if(g.getSchool().equals("School1"))
{
phpRequestLink = myURL;
}
else if(g.getSchool().equals("School2"))
{
phpRequestLink = myURL;
}
else if(g.getSchool().equals("School3"))
{
phpRequestLink = myURL;
}
HttpPost httppost = new HttpPost(phpRequestLink);
HttpResponse response = httpclient.execute(httppost);
}
catch(Exception e)
{
//
}
return null;
}
}
}
答案 0 :(得分：0)
由于您的视图正在回收，因此每次调用getView（）时都必须重置upvote计数值。您可以在这里查看我的一个答案..
How to stop ListView recycling?
RadioButton Android, selected the same value in other row
希望有所帮助.. !!