Android change Fragment page

Question

you can download my zip here

ok so i made an app with Swipe+Tab View i want each tab to show a diffrent .xml page if u click above you can download my workspace to edit

Answer 1

Here is an example of my adapter that solves your problem. TabsPagerAdapter is just separate class.

/**
 * This is a helper class that implements the management of tabs and all
 * details of connecting a ViewPager with associated TabHost.  It relies on a
 * trick.  Normally a tab host has a simple API for supplying a View or
 * Intent that each tab will show.  This is not sufficient for switching
 * between pages.  So instead we make the content part of the tab host
 * 0dp high (it is not shown) and the TabsAdapter supplies its own dummy
 * view to show as the tab content.  It listens to changes in tabs, and takes
 * care of switch to the correct paged in the ViewPager whenever the selected
 * tab changes.
 */
public class TabsPagerAdapter extends FragmentPagerAdapter implements TabHost.OnTabChangeListener, ViewPager.OnPageChangeListener{
    private final Context mContext;
    private final TabHost mTabHost;
    private final ViewPager mViewPager;
    private final OnPageChangeListener mListener;
    private final ArrayList mTabs = new ArrayList();
    private final FragmentManager mFragmentManager;






    static final class TabInfo {
        private final String tag;
        private final Class clss;
        private final Bundle args;

        TabInfo(String _tag, Class _class, Bundle _args) {
            tag = _tag;
            clss = _class;
            args = _args;
        }
    }

    static class DummyTabFactory implements TabHost.TabContentFactory {
        private final Context mContext;

        public DummyTabFactory(Context context) {
            mContext = context;
        }

        @Override
        public View createTabContent(String tag) {
            View v = new View(mContext);
            v.setMinimumWidth(0);
            v.setMinimumHeight(0);
            return v;
        }
    }

    public void addTab(String label, String tag, Drawable drawable, Class c, int resourse) {
        addTab(this.mContext, label, tag, drawable, c, resourse);
    }

    public void addTab(Context context, String label, String tag, Drawable drawable, Class c, int resourse) {
        Intent intent = new Intent(context, c);
        TabHost.TabSpec spec = mTabHost.newTabSpec(tag);

        View tabIndicator = LayoutInflater.from(context).inflate(resourse, (TabWidget)mTabHost.findViewById(android.R.id.tabs), false);

        ImageView icon = (ImageView) tabIndicator.findViewById(R.id.icon);
        icon.setImageDrawable(drawable);
        icon.setScaleType(ImageView.ScaleType.FIT_CENTER);

        spec.setIndicator(tabIndicator);
        spec.setContent(intent);
        this.addTab(spec, c, null);
    }

    public TabsPagerAdapter(FragmentActivity activity, TabHost tabHost, ViewPager pager, OnPageChangeListener listener, FragmentManager manager) {
        super(manager);
        mFragmentManager = manager;
        mContext = activity;
        mTabHost = tabHost;
        mViewPager = pager;
        mListener = listener;
        mTabHost.setOnTabChangedListener(this);
        mViewPager.setAdapter(this);
        mViewPager.setOnPageChangeListener(this);

    }

    public void addTab(TabHost.TabSpec tabSpec, Class clss, Bundle args) {
        tabSpec.setContent(new DummyTabFactory(mContext));
        String tag = tabSpec.getTag();

        TabInfo info = new TabInfo(tag, clss, args);
        mTabs.add(info);
        mTabHost.addTab(tabSpec);
        notifyDataSetChanged();
    }

    @Override
    public int getCount() {
        return mTabs.size();
    }


    @Override
    public CharSequence getPageTitle (int position){

    }



    public Fragment getCurrentFragment() {
        return getFragmentAt(mTabHost.getCurrentTab());
    }

    public Fragment getFragmentAt(int position){
        return mFragmentManager.findFragmentByTag("android:switcher:" + mViewPager.getId() + ":" + position);
    }

    @Override
    public Fragment getItem(int position) {
        TabInfo info = (TabInfo) mTabs.get(position);
        return Fragment.instantiate(mContext, info.clss.getName(), info.args);
    }

    @Override
    public void onTabChanged(String tabId) {
        //called when the user clicks on a tab.
        int position = mTabHost.getCurrentTab();
        if(mViewPager.getCurrentItem() != position){
             mViewPager.setCurrentItem(position);
        }
    }

    @Override
    public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
         if(mListener!=null){
             mListener.onPageScrolled(position, positionOffset, positionOffsetPixels);
         }
    }

    @Override
    public void onPageSelected(int position) {
        // Unfortunately when TabHost changes the current tab, it kindly
        // also takes care of putting focus on it when not in touch mode.
        // The jerk.
        // This hack tries to prevent this from pulling focus out of our
        // ViewPager.
        TabWidget widget = mTabHost.getTabWidget();
        int oldFocusability = widget.getDescendantFocusability();
        widget.setDescendantFocusability(ViewGroup.FOCUS_BLOCK_DESCENDANTS);
        mTabHost.setCurrentTab(position);
        widget.setDescendantFocusability(oldFocusability);
        if(mListener!=null){
            mListener.onPageSelected(position);
        }

    }

    @Override
    public void onPageScrollStateChanged(int state) {
         if(mListener!=null){
             mListener.onPageScrollStateChanged(state);
         }
    }
}

This is android example framentadapter with tiny modifications.

Example usage MainActivity.java

class MainActivity extends FragmentActivuty{

public void onCreate(Bundle savedInstanceState){
    setContentView(R.layout.activity_main);

    mTabHost = (TabHost) findViewById(android.R.id.tabhost);
    mTabHost.setup();
    mViewPager = (ViewPager) findViewById(R.id.pager);
    mTabsAdapter = new TabsPagerAdapter(this, mTabHost, mViewPager,null, getSupportFragmentManager());

    mTabsAdapter.addTab("Button", "button",getResources().getDrawable(R.drawable.yourdrawable),
    ButtonFragment.class, R.layout.yourtablayout);

    mTabsAdapter.addTab("Text","text",getResources().getDrawable(R.drawable.yourdrawable), TextFragment.class, R.layout.yourtablayout);


    //This is needed so your tabs do not reload each time
    mViewPager.setOffscreenPageLimit(mTabsAdapter.getCount());

}