Lagging when swiping between tabs?
android, android-tabs, listview, smoothing
Solution
As you are using many listviews, there are multiple causes that can slow down your performance..
- How are you using adapter, eg: inflating a new view without using recycled convert view.
- Improper layout XML declaration on list item, eg: using very complicated layout.
- If you are doing a refresh every time you swipe a page, ViewPager.setOffscreenPageLimit(int limit) can prevent a reload while consuming more memory.
And if you're saying your application closes, you should have some stack trace available, posting it up helps us to identify the error.
Problem
I am implementing `tabs` in my `activity`. I have 5 tabs and every tab contains a `listview` (i get the content of the listview through asynctask) That's the image: Now Codes: ``` mViewPager .setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() { @Override public void onPageSelected(int position) { ab.setSelectedNavigationItem(position); } }); this.getSherlockActivity().getSupportActionBar().removeAllTabs(); ab.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS); com.actionbarsherlock.app.ActionBar.Tab tab1 = ab .newTab() .setText("Samsung") .setTabListener( new TabListener<SamsungLB>(this.getSherlockActivity(), "tabone", SamsungLB.class)); com.actionbarsherlock.app.ActionBar.Tab tab2 = ab .newTab() .setText("HTC") .setTabListener( new TabListener<HTCLB>(this.getSherlockActivity(), "tabtwo", HTCLB.class)); com.actionbarsherlock.app.ActionBar.Tab tab3 = ab .newTab() .setText("LG") .setTabListener( new TabListener<LGLB>(this.getSherlockActivity(), "tabthree", LGLB.class)); com.actionbarsherlock.app.ActionBar.Tab tab4 = ab .newTab() .setText("Sony") .setTabListener( new TabListener<SonyLB>(this.getSherlockActivity(), "tabfour", SonyLB.class)); com.actionbarsherlock.app.ActionBar.Tab tab5 = ab .newTab() .setText("Search") .setTabListener( new TabListener<SearchLB>(this.getSherlockActivity(), "tabfive", SearchLB.class)); ab.addTab(tab1); ab.addTab(tab2); ab.addTab(tab3); ab.addTab(tab4); ab.addTab(tab5); return rootView; } @SuppressLint("NewApi") public static class TabListener<T extends SherlockFragment> implements ActionBar.TabListener { private Fragment mFragment; private final Activity mActivity; private final String mTag; private final Class<T> mClass; public TabListener(Activity activity, String tag, Class<T> clz) { mActivity = activity; mTag = tag; mClass = clz; } public void onTabSelected(Tab tab, FragmentTransaction ft) { if (mFragment == null) { mFragment = Fragment.instantiate(mActivity, mClass.getName()); ft.add(android.R.id.content, mFragment, mTag); } else { ft.attach(mFragment); } } public void onTabUnselected(Tab tab, FragmentTransaction ft) { if (mFragment != null) { ft.detach(mFragment); } } public void onTabReselected(Tab tab, FragmentTransaction ft) { } public void onTabReselected(Tab arg0, android.app.FragmentTransaction arg1) { } @SuppressLint("NewApi") public void onTabSelected(Tab arg0, android.app.FragmentTransaction arg1) { mViewPager.setCurrentItem(arg0.getPosition()); } public void onTabUnselected(Tab arg0, android.app.FragmentTransaction arg1) { } @Override public void onTabSelected(com.actionbarsherlock.app.ActionBar.Tab tab, FragmentTransaction ft) { // TODO Auto-generated method stub mViewPager.setCurrentItem(tab.getPosition()); } @Override public void onTabUnselected( com.actionbarsherlock.app.ActionBar.Tab tab, FragmentTransaction ft) { // TODO Auto-generated method stub } @Override public void onTabReselected( com.actionbarsherlock.app.ActionBar.Tab tab, FragmentTransaction ft) { // TODO Auto-generated method stub } } ``` Basically, every tab have a listview that fills through AsyncTask. i get the results through JSON And parse them. later on i parse the images through imageloader. Why it's lagging??? Specially when i change from LG TO HTC. (Even there the application closes sometimes!). thanks your help will be appreciated :) UPDATE: All tabs are using the same layout file. CODES: ``` <ListView xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/listview1" android:layout_width="match_parent" android:layout_height="match_parent" android:drawSelectorOnTop="false" /> ``` Kindly help.