在我的应用程序中，我想对同一帖子类别中的每个帖子进行分组。Listview 不会刷新项目计数。例如，“.Net”类别有 3 个帖子。Listview 有 15 行。12 行似乎是空的。如何刷新列表视图行数？我尝试了一些东西，但我没有。我是否为每个类别创建不同的布局文件？第一张图片显示了我博客中的所有帖子。第二张图片显示仅获取“.Net”类别的帖子。
public class Anasayfa extends FragmentActivity implements ActionBar.TabListener {
private String[][] liste;
private int tabdeger = 0;
private MyCustomAdapter adapter;
private static ListView listview;
/**
* The serialization (saved instance state) Bundle key representing the
* current tab position.
*/
public class arkaPlanIsleri extends AsyncTask<String[][], String[][], String[][]> {
private ProgressDialog dialog = new ProgressDialog(Anasayfa.this);
int kategori;
public arkaPlanIsleri(int kategori){
this.kategori = kategori;
}
@Override
protected void onPostExecute(String[][] liste) {
// TODO Auto-generated method stub
switch(kategori){
case 0:
listview = (ListView)findViewById(R.id.list);
adapter = new MyCustomAdapter(Anasayfa.this, R.layout.list, liste[0]);
listview.setAdapter(adapter);
break;
case 1:
listview = (ListView)findViewById(R.id.list);
adapter = new MyCustomAdapter(Anasayfa.this, R.layout.deneme, liste[0]);
listview.setAdapter(adapter);
break;
}
dialog.dismiss();
}
@Override
protected void onPreExecute() {
// TODO Auto-generated method stub
dialog.setMessage("Yükleniyor...");
dialog.show();
}
@Override
protected String[][] doInBackground(String[][]... params) {
// TODO Auto-generated method stub
getListFromXml("feed",kategori);
return liste;
}
}
public class MyCustomAdapter extends ArrayAdapter<String> {
String[] xmlList;
public MyCustomAdapter(Context context, int textViewResourceId,
String[] liste) {
super(context, textViewResourceId, liste);
// TODO Auto-generated constructor stub
xmlList = liste;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
//return super.getView(position, convertView, parent);
View row=convertView;
switch(tabdeger){
case 0:
if(row==null){
LayoutInflater inflater=getLayoutInflater();
row=inflater.inflate(R.layout.list, parent,false);
}
TextView label=(TextView)row.findViewById(R.id.text1);
label.setText(xmlList[position]);
ImageView image =(ImageView)row.findViewById(R.id.img);
image.setImageResource(R.drawable.ic_launcher );
break;
case 1:
if(row==null){
LayoutInflater inflater=getLayoutInflater();
row=inflater.inflate(R.layout.deneme, parent,false);
}
TextView label2=(TextView)row.findViewById(R.id.text2);
label2.setText(xmlList[position]);
ImageView image2 =(ImageView)row.findViewById(R.id.img2);
image2.setImageResource(R.drawable.ic_launcher );
break;
}
return row;
}
}
public String[][] getListFromXml(String strng,int kategori) {
try {
URL url=new URL(strng);
DocumentBuilderFactory dFactory=DocumentBuilderFactory.newInstance();
DocumentBuilder dBuilder=dFactory.newDocumentBuilder();
Document document=dBuilder.parse(new InputSource(url.openStream()));
document.getDocumentElement().normalize();
NodeList nodeListCountry=document.getElementsByTagName("item");
int sayi = nodeListCountry.getLength();
liste[1] = new String[sayi]; //category
int genelcount=0;
int netcount=0;
int androidcount=0;
int ilgicount=0;
int windowscount=0;
for (int i = 0; i < nodeListCountry.getLength(); i++) {
Node node=nodeListCountry.item(i);
Element elementMain=(Element) node;
NodeList nodeListText=elementMain.getElementsByTagName("title");
Element elementText=(Element) nodeListText.item(0);
NodeList kategoriler = elementMain.getElementsByTagName("category");
Element kategoriText = (Element) kategoriler.item(0);
liste[1][i] = kategoriText.getChildNodes().item(0).getNodeValue();
switch(kategori){
case 0:
break;
case 1:
netcount++;
break;
case 2:
androidcount++;
break;
case 3:
genelcount++;
break;
case 4:
ilgicount++;
break;
case 5:
windowscount++;
break;
}
}
switch(kategori){
case 0:
liste[0] = new String[sayi]; //title
break;
case 1:
liste[0] = new String[netcount]; //title
break;
case 2:
liste[0] = new String[androidcount]; //title
break;
case 3:
liste[0] = new String[genelcount]; //title
break;
case 4:
liste[0] = new String[ilgicount]; //title
break;
case 5:
liste[0] = new String[windowscount]; //title
break;
}
int flag=0;
for (int i = 0; i < nodeListCountry.getLength(); i++) {
Node node=nodeListCountry.item(i);
Element elementMain=(Element) node;
NodeList nodeListText=elementMain.getElementsByTagName("title");
Element elementText=(Element) nodeListText.item(0);
switch(kategori){
case 0:
liste[0][i]=elementText.getChildNodes().item(0).getNodeValue();
break;
case 1:
if(liste[1][i].equals(".Net")){
liste[0][flag]=elementText.getChildNodes().item(0).getNodeValue();
flag++;
}
break;
case 2:
if(liste[1][i].equals("Android")){
liste[0][flag]=elementText.getChildNodes().item(0).getNodeValue();
flag++;
}
break;
case 3:
if(liste[1][i].equals("Genel")){
liste[0][flag]=elementText.getChildNodes().item(0).getNodeValue();
flag++;
}
break;
case 4:
if(liste[1][i].equals("İlgi Çekici")){
liste[0][flag]=elementText.getChildNodes().item(0).getNodeValue();
flag++;
}
break;
case 5:
if(liste[1][i].equals("Windows Phone")){
liste[0][flag]=elementText.getChildNodes().item(0).getNodeValue();
flag++;
}
break;
}
}
} catch (MalformedURLException e) {
e.printStackTrace();
}catch (ParserConfigurationException e) {
e.printStackTrace();
} catch (SAXException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return liste;
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_anasayfa);
liste = new String[2][];
// new arkaPlanIsleri(tabdeger).execute();
listview = (ListView)findViewById(R.id.list);
// Set up the action bar to show tabs.
final ActionBar actionBar = getActionBar();
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
// For each of the sections in the app, add a tab to the action bar.
actionBar.addTab(actionBar.newTab().setText("HEPSİ")
.setTabListener(this));
actionBar.addTab(actionBar.newTab().setText(".Net")
.setTabListener(this));
actionBar.addTab(actionBar.newTab().setText("ANDROID")
.setTabListener(this));
actionBar.addTab(actionBar.newTab().setText("GENEL")
.setTabListener(this));
actionBar.addTab(actionBar.newTab().setText("İLGİ ÇEKİCİ")
.setTabListener(this));
actionBar.addTab(actionBar.newTab().setText("WINDOWS PHONE")
.setTabListener(this));
}
@Override
public void onTabSelected(ActionBar.Tab tab,
FragmentTransaction fragmentTransaction) {
// When the given tab is selected, show the tab contents in the
// container view.
Fragment fragment = new DummySectionFragment();
Bundle args = new Bundle();
args.putInt(DummySectionFragment.ARG_SECTION_NUMBER,
tab.getPosition() + 1);
fragment.setArguments(args);
getSupportFragmentManager().beginTransaction()
.replace(R.id.container, fragment).commit();
tabdeger = tab.getPosition();
liste = new String[2][];
// xmlList = new String[sayi];
listview.setAdapter(null);
new arkaPlanIsleri(tabdeger).execute();
}