I use PagerSlidingTabStrip library but I have a problem with this library. I have a GridView that gets updated from the web by an AsyncTask when the page is changed. if swipe from page 1 to page 2, page 2 get update from web but My problem is, when such as tab 1 is selected click on tab 2, page 2 not update and show page 1 content(grid adapter updated but pager not show new content). swipe update contents but tab select not update content. what is wrong in my code?
How to avoid cache next and prev page in pager? I want receive data from server when select any page.
public class SubCategoryActivity extends SherlockFragmentActivity {
boolean firstPagerAdapterConfirmed = false;
LayoutInflater inflator;
PagerSlidingTabStrip tabs;
ViewPager pager;
MyPagerAdapter pagerAdapter;
TextView tvCustomTitle;
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
JSONArray jsonArray;
String[][] SubCat;
GridviewAdapter gridAdapter;
GridView gridViewSubCategory;
HashMap<String, String> map;
ArrayList<HashMap<String, String>> list = new ArrayList<HashMap<String, String>>();
Intent intent;
int recordNum = 0;
int totalItems = 0;
int pageNum = 1;
int itemsPerPage = 20;
boolean loadingMore = false;
int itemId[];
ProgressBar progressBar;
RelativeLayout relativeLayoutLoadingMore;
private class getSubCategoryObjects extends AsyncTask<String, Void, String> {
int i = 0;
@Override
protected String doInBackground(String... url) {
// TODO Auto-generated method stub
return BaseActivity.jsonParser.makeHttpRequest(url[0], "POST",
nameValuePairs);
}
@Override
protected void onProgressUpdate(Void... values) {
// TODO Auto-generated method stub
super.onProgressUpdate(values);
// progressBar.setVisibility(View.VISIBLE);
}
@Override
protected void onPostExecute(String result) {
// TODO Auto-generated method stub
try {
jsonArray = new JSONArray(result);
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
if (pageNum == 1 ) {
i = 3;
try {
recordNum = jsonArray.getJSONObject(0).getInt("recordNum");
totalItems = jsonArray.getJSONObject(1)
.getInt("totalItems");
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
itemId = new int[totalItems];
for (int i = 0; i < totalItems; i++) {
try {
itemId[i] = jsonArray.getJSONObject(2).getInt(
String.valueOf(i));
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
for (; i < jsonArray.length(); i++) {
JSONObject jsonObjet;
map = new HashMap<String, String>();
try {
jsonObjet = jsonArray.getJSONObject(i);
map.put("id", String.valueOf(jsonObjet.getInt("id")));
map.put("title", jsonObjet.getString("title_fa"));
map.put("image", jsonObjet.getString("image"));
map.put("price", jsonObjet.getString("price"));
map.put("date", jsonObjet.getString("date"));
list.add(map);
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}
}
if (pageNum == 1 && firstPagerAdapterConfirmed == false) {
// progressBar.setVisibility(View.GONE);
gridAdapter = new GridviewAdapter(SubCategoryActivity.this,
list);
pagerAdapter = new MyPagerAdapter(gridAdapter);
pager.setAdapter(pagerAdapter);
firstPagerAdapterConfirmed = true;
//pager.setOffscreenPageLimit(1);
}else if(pageNum == 1 && firstPagerAdapterConfirmed) {
//progressBar.setVisibility(View.GONE);
gridAdapter = new GridviewAdapter(SubCategoryActivity.this,
list);
gridViewSubCategory.setAdapter(gridAdapter);
}else {
gridAdapter.GridviewAdapterAdd(SubCategoryActivity.this,
list);
runOnUiThread(returnRes);
}
}
}
private class getSubCategory extends AsyncTask<String, Void, String> {
@Override
protected String doInBackground(String... url) {
// TODO Auto-generated method stub
return BaseActivity.jsonParser.makeHttpRequest(url[0], "POST",
nameValuePairs);
}
@Override
protected void onProgressUpdate(Void... values) {
// TODO Auto-generated method stub
super.onProgressUpdate(values);
}
@Override
protected void onPostExecute(String result) {
// TODO Auto-generated method stub
try {
jsonArray = new JSONArray(result);
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
SubCat = new String[jsonArray.length()][2];
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject jsonObjet;
try {
jsonObjet = jsonArray.getJSONObject(i);
SubCat[i][0] = String.valueOf(jsonObjet.getInt("id"));
SubCat[i][1] = jsonObjet.getString("title_fa");
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (Exception e) {
// TODO: handle exception
e.toString();
}
}
pagerAdapter = new MyPagerAdapter();
pager.setAdapter(pagerAdapter);
// pager.setCurrentItem(SubCat.length-1);
// final int pageMargin = (int) TypedValue.applyDimension(
// TypedValue.COMPLEX_UNIT_DIP, 30, getResources()
// .getDisplayMetrics());
// pager.setPageMargin(pageMargin);
// pager.setCurrentItem(0);
// pager.setOffscreenPageLimit(0);
tabs.setViewPager(pager);
tabs.setTextSize(20);
tabs.setTypeface(BaseActivity.font, Typeface.NORMAL);
list = new ArrayList<HashMap<String, String>>();
nameValuePairs = new ArrayList<NameValuePair>();
nameValuePairs.add(new BasicNameValuePair("getAdvertise", "true"));
nameValuePairs
.add(new BasicNameValuePair("subCatId", SubCat[0][0]));
new getSubCategoryObjects().execute(url2);
}
}
@SuppressLint("NewApi")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_list);
intent = getIntent();
tabs = (PagerSlidingTabStrip) findViewById(R.id.tabs);
pager = (ViewPager) findViewById(R.id.pager);
tabs.setOnPageChangeListener(new OnPageChangeListener() {
@Override
public void onPageSelected(int arg0) {
// TODO Auto-generated method stub
recordNum = 0;
totalItems = 0;
pageNum = 1;
//loadingMore = false;
jsonArray = new JSONArray();
list = new ArrayList<HashMap<String, String>>();
nameValuePairs = new ArrayList<NameValuePair>();
nameValuePairs.add(new BasicNameValuePair("getAdvertise",
"true"));
nameValuePairs.add(new BasicNameValuePair("subCatId",
SubCat[arg0][0]));
// Activity myActivity = getActivity();
// if (myActivity instanceof SubCategoryActivity) {
new getSubCategoryObjects().execute(url2);
}
@Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
// TODO Auto-generated method stub
}
@Override
public void onPageScrollStateChanged(int arg0) {
// TODO Auto-generated method stub
}
});
inflator = SubCategoryActivity.this.getLayoutInflater();
jsonArray = new JSONArray();
nameValuePairs = new ArrayList<NameValuePair>();
nameValuePairs.add(new BasicNameValuePair("getSubCategory", "true"));
nameValuePairs.add(new BasicNameValuePair("catId", intent
.getStringExtra("id")));
new getSubCategory().execute(url);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setDisplayShowTitleEnabled(false);
getSupportActionBar().setDisplayShowCustomEnabled(true);
tvCustomTitle = new TextView(this);
tvCustomTitle.setText(intent.getStringExtra("title"));
LinearLayout ll = new LinearLayout(this);
LinearLayout.LayoutParams para = new LinearLayout.LayoutParams(
LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
para.setMargins(0, 0, 0, 0); // left,top,right, bottom
para.gravity = Gravity.CENTER_VERTICAL;
tvCustomTitle.setTypeface(BaseActivity.font);
Configuration config = getResources().getConfiguration();
if (Build.VERSION.SDK_INT >= 13) {
if (config.smallestScreenWidthDp >= 600) {
tvCustomTitle.setTextSize(22);
} else {
tvCustomTitle.setTextSize(14);
}
} else {
tvCustomTitle.setTextSize(14);
}
tvCustomTitle.setTextColor(Color.WHITE);
ll.addView(tvCustomTitle, para);
getSupportActionBar().setCustomView(ll);
changeColor(intent.getIntExtra("color", Color.parseColor("#FF666666")));
}
private void changeColor(int newColor) {
tabs.setIndicatorColor(newColor);
// change ActionBar color just if an ActionBar is available
Drawable colorDrawable = new ColorDrawable(newColor);
Drawable bottomDrawable = getResources().getDrawable(
R.drawable.actionbar_bottom);
LayerDrawable ld = new LayerDrawable(new Drawable[] { colorDrawable,
bottomDrawable });
getSupportActionBar().setBackgroundDrawable(ld);
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
}
@Override
protected void onRestoreInstanceState(Bundle savedInstanceState) {
super.onRestoreInstanceState(savedInstanceState);
}
public class MyPagerAdapter extends PagerAdapter {
GridviewAdapter gridAdapter;
public MyPagerAdapter(GridviewAdapter gridAdapter) {
// TODO Auto-generated constructor stub
this.gridAdapter = gridAdapter;
}
public MyPagerAdapter() {
// TODO Auto-generated constructor stub
}
public Object instantiateItem(View collection, int position) {
View rootView = inflator.inflate(
R.layout.fragment_sub_category_objects, null);
gridViewSubCategory = (GridView) rootView
.findViewById(R.id.gridViewSubCategory);
//progressBar = (ProgressBar) rootView.findViewById(R.id.progressBar);
relativeLayoutLoadingMore = (RelativeLayout) rootView.findViewById(R.id.relativeLayoutLoadingMore);
gridViewSubCategory.setAdapter(gridAdapter);
gridViewSubCategory
.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent,
View view, int position, long id) {
// TODO Auto-generated method stub
BaseActivity.cd = new ConnectionDetector(
SubCategoryActivity.this);
BaseActivity.isInternetPresent = BaseActivity.cd
.isConnectingToInternet();
if (BaseActivity.isInternetPresent) {
Intent i = new Intent(SubCategoryActivity.this,
SubCategoryActivity.class);
i.putExtra("id", ((TextView) view
.findViewById(R.id.textViewId))
.getText().toString());
i.putExtra(
"color",
i.getIntExtra("color",
Color.parseColor("#FF666666")));
startActivity(i);
} else {
Toast.makeText(
SubCategoryActivity.this,
"به اینترنت متصل نیستید، به اینترنت متصل شده و دوباره امتحان کنید.",
Toast.LENGTH_SHORT).show();
}
}
});
gridViewSubCategory.setOnScrollListener(new OnScrollListener() {
@Override
public void onScrollStateChanged(AbsListView view,
int scrollState) {
// TODO Auto-generated method stub
}
@Override
public void onScroll(AbsListView view, int firstVisibleItem,
int visibleItemCount, int totalItemCount) {
// TODO Auto-generated method stub
// save index and top position
// what is the bottom iten that is visible
int lastInScreen = firstVisibleItem + visibleItemCount;
// is the bottom item visible & not loading more already ?
// Load
// more !
if ((lastInScreen == totalItemCount) && !(loadingMore)
&& recordNum > 1) {
recordNum--;
pageNum++;
relativeLayoutLoadingMore.setVisibility(View.VISIBLE);
Thread thread = new Thread(null, loadMoreGridItems);
thread.start();
}
}
});
((ViewPager) collection).addView(rootView, 0);
return rootView;
}
@Override
public CharSequence getPageTitle(int position) {
return SubCat[position][1];
}
@Override
public int getCount() {
return SubCat.length;
}
@Override
public void destroyItem(View collection, int position, Object view) {
((ViewPager)collection).removeView((RelativeLayout) view);
}
@Override
public boolean isViewFromObject(View view, Object object) {
return view == ((RelativeLayout) object);
}
}
// Runnable to load the items
private Runnable loadMoreGridItems = new Runnable() {
@Override
public void run() {
// Set flag so we cant load new items 2 at the same time
loadingMore = true;
// Reset the array that holds the new items
list = new ArrayList<HashMap<String, String>>();
nameValuePairs = new ArrayList<NameValuePair>();
nameValuePairs.add(new BasicNameValuePair("getAdvertise", "true"));
nameValuePairs
.add(new BasicNameValuePair("subCatId", SubCat[pager.getCurrentItem()][0]));
nameValuePairs.add(new BasicNameValuePair("pageNum", String
.valueOf(pageNum)));
new getSubCategoryObjects().execute(url3);
}
};
// Since we cant update our UI from a thread this Runnable takes care of
// that!
private Runnable returnRes = new Runnable() {
@Override
public void run() {
//pager.requestLayout();
relativeLayoutLoadingMore.setVisibility(View.GONE);
gridViewSubCategory.setAdapter(gridAdapter);
//gridAdapter.notifyDataSetChanged();
// Done loading more.
loadingMore = false;
}
};
public class GridviewAdapter extends BaseAdapter {
private Activity activity;
private ArrayList<HashMap<String, String>> list;
HashMap<String, String> tempMap;
public GridviewAdapter(Activity activity,
ArrayList<HashMap<String, String>> list) {
this.activity = activity;
this.list = list;
}
public void GridviewAdapterAdd(Activity activity,
ArrayList<HashMap<String, String>> list) {
this.activity = activity;
for (int i = 0; i < list.size(); i++)
this.list.add(list.get(i));
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return list.size();
}
public Object getItem(int position) {
return position;
}
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
LayoutInflater inflator = activity.getLayoutInflater();
View vi = convertView;
if (convertView == null)
vi = inflator.inflate(R.layout.gridview_sub_category_row, null);
TextView id = (TextView) vi.findViewById(R.id.textViewId);
TextView title = (TextView) vi.findViewById(R.id.textViewTitle);
ImageView imageViewSubCat = (ImageView) vi
.findViewById(R.id.imageViewSubCat);
TextView price = (TextView) vi.findViewById(R.id.textViewPrice);
TextView date = (TextView) vi.findViewById(R.id.textViewDate);
RelativeLayout textBackground = (RelativeLayout) vi
.findViewById(R.id.relativeLayoutText);
tempMap = new HashMap<String, String>();
tempMap = list.get(position);
id.setText(tempMap.get("id"));
textBackground.setBackgroundColor(intent.getIntExtra("color",
Color.parseColor("#FF666666")));
title.setText(tempMap.get("title"));
price.setText(tempMap.get("price"));
date.setText(tempMap.get("date"));
title.setTypeface(BaseActivity.font);
price.setTypeface(BaseActivity.font);
date.setTypeface(BaseActivity.font);
// File cachedImg = ImageLoader.getInstance().getDiscCache()
// .get(picUrl + tempMap.get("logo") + ".jpg");
// if (cachedImg.exists())
// cachedImg.delete();
ImageLoader.getInstance().displayImage(
BaseActivity.picUrl + tempMap.get("image") + ".jpg",
imageViewSubCat);
return vi;
}
}