i´m new android , i´ve problem items-background in listview... seems work (items "premium = 1" should have yellow background), when scroll down , everytime other items have yellow background-color?!
and can´t find mistake :(
pois.java (the important part)
protected void ausgeben() { ausgabestring = ausgabestring.trim(); ausgabestring = ausgabestring.substring(1); rowitems = new arraylist<poirowitem>(); try{ jsonarray = new jsonarray(ausgabestring); log.i("ausgabe", "teilsuccess"); for(int i=0; < jsonarray.length(); i++) { jsonobject jsonobj = jsonarray.getjsonobject(i); poirowitem item = new poirowitem(jsonobj.getstring("poi_name"), jsonobj.getstring("poi_id"), jsonobj.getstring("poi_premium")); rowitems.add(item); } } catch(jsonexception e) { log.e("log_tag", "error parsing data "+e.tostring()); } listview = (listview) findviewbyid(r.id.list); poilistviewadapter adapter = new poilistviewadapter(this, r.layout.poi_list_item, rowitems); listview.setadapter(adapter); //listview.setonitemclicklistener(this); } poilistviewadapter.java (where think problem)
import java.util.list; import at.visualstudioteschl.dguide.poirowitem; import at.visualstudioteschl.dguide.r; import android.app.activity; import android.content.context; import android.graphics.color; import android.view.layoutinflater; import android.view.view; import android.view.viewgroup; import android.widget.arrayadapter; import android.widget.textview; public class poilistviewadapter extends arrayadapter<poirowitem> { context context; public poilistviewadapter(context context, int resourceid, list<poirowitem> items) { super(context, resourceid, items); this.context = context; } private class viewholder { textview txttitle; } public view getview(int position, view convertview, viewgroup parent) { viewholder holder = null; poirowitem rowitem = getitem(position); layoutinflater minflater = (layoutinflater) context .getsystemservice(activity.layout_inflater_service); if (convertview == null) { convertview = minflater.inflate(r.layout.poi_list_item, null); holder = new viewholder(); holder.txttitle = (textview) convertview.findviewbyid(r.id.title); convertview.settag(holder); } else holder = (viewholder) convertview.gettag(); holder.txttitle.settext(rowitem.gettitle()); // todo hier gibts noch nen fehler... es werden beim scrollen nach kurzer zeit alle gelb if (rowitem.getpremium().contains("1")){ holder.txttitle.setbackgroundcolor(color.yellow); } return convertview; } } poirowitem.java
public class poirowitem { private string title; private string kat_id; private string premium; public poirowitem(string title, string kat_id, string premium) { this.title = title; this.kat_id = kat_id; this.premium = premium; } public string getid() { return kat_id; } public void setid(string id) { this.kat_id = id; } public string gettitle() { return title; } public void settitle(string title) { this.title = title; } @override public string tostring() { return kat_id; } public string getpremium() { return premium; } public void setpremium(string premium) { this.premium = premium; } } *poi_list_item.xml*
<?xml version="1.0" encoding="utf-8"?> <relativelayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" > <textview android:id="@+id/title" android:layout_width="fill_parent" android:layout_height="wrap_content" android:gravity="left" android:padding="5dp" android:textsize="20sp" android:singleline="true"/> </relativelayout>
the views re-used.. need set original color when don't want yellow color.
// todo hier gibts noch nen fehler... es werden beim scrollen nach kurzer zeit alle gelb if (rowitem.getpremium().contains("1")){ holder.txttitle.setbackgroundcolor(color.yellow); } else{ holder.txttitle.setbackgroundcolor(color.white); // original color here } 
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