我工作viewpager.i有一些pages.i也有listview女性适应一些图像和文本。 我写函数巫婆有int位置巫婆意味着每个位置我试图适应不同的值。 我在viewpager的setOnPageChangeListener方法中使用此函数，但我无法更新我的listview
这是我的适配器源代码
public class MyAdapter extends BaseAdapter {
private Context activity;
private List<CopyOfServerItems> items;
private CopyOfServerItems objBean;
private int row;
public ImageLoader imageLoader;
public MyAdapter(Context act, int resource, List<CopyOfServerItems> arrayList
) {
super();
this.activity = act;
this.row = resource;
imageLoader = new ImageLoader(act.getApplicationContext());
this.items = arrayList;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
View view = convertView;
ViewHolder holder;
if (view == null) {
LayoutInflater inflater = (LayoutInflater) activity
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = inflater.inflate(row, null);
holder = new ViewHolder();
view.setTag(holder);
} else {
holder = (ViewHolder) view.getTag();
}
if ((items == null) || ((position + 1) > items.size()))
return view;
objBean = items.get(position);
holder.title = (TextView) view.findViewById(R.id.cat_title);
holder.img = (ImageView) view.findViewById(R.id.cat_image);
holder.title.setText(objBean.getTitle());
imageLoader.DisplayImage(objBean.getThumbnail(), holder.img);
//holder.img.setImageResource(Imageid[position]);
return view;
}
public class ViewHolder {
public TextView title;
public ImageView img;
}
@Override
public int getCount() {
return items.size();
}
@Override
public Object getItem(int position) {
return null;
}
@Override
public long getItemId(int position) {
return 0;
}
}
这是我的java codee
public class CategoryViewPager extends Fragment {
public final static String TAG = CategoryViewPager.class
.getSimpleName();
public static List<CopyOfServerItems> arrayOfList;
public static List<CopyOfServerItems> arrayOfList1;
private MyAdapter objAdapter;
public static CategoryViewPager newInstance() {
return new CategoryViewPager();
}
private ViewPager mViewPager;
private ListView cat_listview;
private PagerTitleStrip mPagerTitleStrip;
String result;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.azercell_category_viewpager,
container, false);
arrayOfList = new ArrayList<CopyOfServerItems>();
arrayOfList1 = new ArrayList<CopyOfServerItems>();
final List<View> pages = new ArrayList<View>();
final ArrayList<String> titles = new ArrayList<String>();
mViewPager = (ViewPager) rootView.findViewById(R.id.viewpager);
mPagerTitleStrip = (PagerTitleStrip) rootView
.findViewById(R.id.pagertitle);
LayoutInflater inflater1 = LayoutInflater.from(getActivity());
View page = inflater1.inflate(R.layout.azercell_category_pages, null);
page = inflater.inflate(R.layout.azercell_category_pages, null);
cat_listview = (ListView) page.findViewById(R.id.cat_listview);
mPagerTitleStrip.setTextColor(Color.BLUE);
for (int i = 0; i < arrayOfList.size(); i++) {
page = inflater.inflate(R.layout.azercell_category_pages, null);
cat_listview = (ListView) page.findViewById(R.id.cat_listview);
cat_listview.setAdapter(objAdapter);
titles.add(arrayOfList.get(i).getTitle());
pages.add(page);
}
mViewPager.setOnPageChangeListener(new OnPageChangeListener() {
@Override
public void onPageSelected(int arg0) {
try {
Log.e("position viewpager", String.valueOf(arg0));
parseJsonFromServer(result, arg0);
objAdapter.notifyDataSetChanged();
} catch (JSONException e) {
e.printStackTrace();
}
}
@Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
}
@Override
public void onPageScrollStateChanged(int arg0) {
}
});
PagerAdapter p_adapter = new PagerAdapter() {
@Override
public boolean isViewFromObject(View arg0, Object arg1) {
return arg0 == arg1;
}
@Override
public int getCount() {
return pages.size();
}
@Override
public void destroyItem(View container, int position, Object object) {
((ViewPager) container).removeView(pages.get(position));
}
@Override
public CharSequence getPageTitle(int position) {
return titles.get(position);
}
@Override
public Object instantiateItem(View container, int position) {
((ViewPager) container).addView(pages.get(position));
return pages.get(position);
}
};
mViewPager.setAdapter(p_adapter);
return rootView;
}
public String parseJsonFromServer(String server, int position)
throws JSONException {
JSONArray jsonArray = null;
JSONObject mainJson = new JSONObject(server);
jsonArray = mainJson.getJSONArray("result");
JSONArray children = jsonArray.getJSONObject(position).getJSONArray(
"children");
for (int j = 0; j < children.length(); j++) {
CopyOfServerItems objItem = new CopyOfServerItems();
JSONObject data = children.getJSONObject(j).getJSONObject("data");
objItem.setTitle(data.getString("title"));
objItem.setThumbnail(data.getString("thumbnail"));
Log.e("123123123123", data.getString("title"));
arrayOfList1.add(objItem);
}
setAdapterToListview();
return server;
}
public void setAdapterToListview() {
objAdapter = new MyAdapter(getActivity(),
R.layout.azercell_category_adapter, arrayOfList1);
objAdapter.notifyDataSetChanged();
}
}
我的parseJsonFromServer解析服务器的位置。当位置发生变化时也必须改变我的json.i做了它。但如果我使用位置0然后位置1我的适配器无法更新。我可以显示所有值（我的意思是0和1位置） 我怎么能解决我的问题？ 如果有人知道解决方案，请帮助我
答案 0 :(得分：0)
修改：您的所有代码都显示错误我很抱歉这可能无效。
首先，最好将位置作为对象id返回：
@Override
public long getItemId(int position) {
return position;
}
其次，您不应该更改适配器以更新listview。您应该更新适配器数据。
将此添加到您的适配器：
updateData( int resource, List<CopyOfServerItems> arrayList ){
this.row = resource;
this.items = arrayList;
}
并使用以下命令更改setAdapterToListView：
updateListView( int resource, List<CopyOfServerItems> arrayList ){
objAdapter.updateData( resource, arrayList );
objAdapter.notifyDataSetChanged();
}
我想用土耳其语或阿塞拜疆语进行解释，但网站规则不允许我这样做。所以我能做的最好的就是帮助你。希望它有效。
编辑：将您的代码更改为：
public class CategoryViewPager extends Fragment {
public final static String TAG = CategoryViewPager.class
.getSimpleName();
public static List<CopyOfServerItems> arrayOfList;
public static List<CopyOfServerItems> arrayOfList1;
private MyAdapter[] objAdapter;
public static CategoryViewPager newInstance() {
return new CategoryViewPager();
}
private ViewPager mViewPager;
private ListView[] cat_listview;
private PagerTitleStrip mPagerTitleStrip;
String result;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.azercell_category_viewpager,
container, false);
arrayOfList = new ArrayList<CopyOfServerItems>();
arrayOfList1 = new ArrayList<CopyOfServerItems>();
final List<View> pages = new ArrayList<View>();
final ArrayList<String> titles = new ArrayList<String>();
mViewPager = (ViewPager) rootView.findViewById(R.id.viewpager);
mPagerTitleStrip = (PagerTitleStrip) rootView
.findViewById(R.id.pagertitle);
mPagerTitleStrip.setTextColor(Color.BLUE);
cat_listview = new ListView[ arrayOfList.size() ];
objAdapter = new MyAdapter[ arrayOfList.size() ];
for (int i = 0; i < arrayOfList.size(); i++) {
View page = inflater.inflate(R.layout.azercell_category_pages, null);
cat_listviews[ i ] = (ListView) page.findViewById(R.id.cat_listview);
objAdapter[ i ] = new MyAdapter( [put some paremeters here] );
cat_listview[ i ].setAdapter(objAdapter[ i ] );
titles.add(arrayOfList.get(i).getTitle());
pages.add(page);
}
.........
public String parseJsonFromServer(String server, int position)
throws JSONException {
JSONArray jsonArray = null;
JSONObject mainJson = new JSONObject(server);
jsonArray = mainJson.getJSONArray("result");
JSONArray children = jsonArray.getJSONObject(position).getJSONArray(
"children");
for (int j = 0; j < children.length(); j++) {
CopyOfServerItems objItem = new CopyOfServerItems();
JSONObject data = children.getJSONObject(j).getJSONObject("data");
objItem.setTitle(data.getString("title"));
objItem.setThumbnail(data.getString("thumbnail"));
Log.e("123123123123", data.getString("title"));
arrayOfList1.add(objItem);
}
updateListview( resource, obj, position );
return server;
}
updateListView( int resource, List<CopyOfServerItems> arrayList ){
objAdapter[ position ].updateData( resource, arrayList );
objAdapter[ position ].notifyDataSetChanged();
}
以及我之前发送给你的适配器的代码。