Android滾動到Tabs

Question

EDIT2：我會更清楚，所以每個人都明白我的問題。我希望更多的人能幫助我！

我做了什麼是一個應用程序，它包含片段和標籤之間切換片段。我也可以使用ViewPager在片段之間滾動/滑動。

現在唯一的問題是標籤不會隨着片段一起滾動。因此，當我滑動到最後一個片段時，我看不到選定的選項卡，因爲它已超出查看範圍。

如何在碎片之間滑動時滾動到Tabs？

我想我必須做一些與這部分代碼：

public void onPageSelected(int position) { 
    // TODO Auto-generated method stub 
    this.mTabHost.setCurrentTab(position); 
} 

但我沒有任何線索，我都試過了不起作用。爲了更容易，這裏是代碼的兩個重要部分。我希望有人能幫助我！

我的主要代碼：

public class MainActivity extends FragmentActivity implements TabHost.OnTabChangeListener, ViewPager.OnPageChangeListener { 

    private TabHost mTabHost; 
    private ViewPager mViewPager; 
    private HashMap<String, TabInfo> mapTabInfo = new HashMap<String, MainActivity.TabInfo>(); 
    private PagerAdapter mPagerAdapter; 

    private class TabInfo { 
     private String tag; 
     TabInfo(String tag, Class<?> clazz, Bundle args) { 
      this.tag = tag; 
     } 
    } 

    class TabFactory implements TabContentFactory { 
     private final Context mContext; 

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

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

    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.tabs_layout); 
     this.initialiseTabHost(savedInstanceState); 
     if (savedInstanceState != null) { 
      mTabHost.setCurrentTabByTag(savedInstanceState.getString("tab")); 
     } 
     this.intialiseViewPager(); 
    } 

    protected void onSaveInstanceState(Bundle outState) { 
     outState.putString("tab", mTabHost.getCurrentTabTag()); 
     super.onSaveInstanceState(outState); 
    } 

    private void intialiseViewPager() { 
     List<Fragment> fragments = new Vector<Fragment>(); 
     fragments.add(Fragment.instantiate(this, TabFragment1.class.getName())); 
     fragments.add(Fragment.instantiate(this, TabFragment2.class.getName())); 
     fragments.add(Fragment.instantiate(this, TabFragment3.class.getName())); 
     fragments.add(Fragment.instantiate(this, TabFragment4.class.getName())); 
     fragments.add(Fragment.instantiate(this, TabFragment5.class.getName())); 
     this.mPagerAdapter = new PagerAdapter(super.getSupportFragmentManager(), fragments); 
     // 
     this.mViewPager = (ViewPager)super.findViewById(R.id.viewpager); 
     this.mViewPager.setAdapter(this.mPagerAdapter); 
     this.mViewPager.setOnPageChangeListener(this); 
    } 

    private void initialiseTabHost(Bundle args) { 
     mTabHost = (TabHost)findViewById(android.R.id.tabhost); 
     mTabHost.setup(); 
     TabInfo tabInfo = null; 
     MainActivity.AddTab(this, this.mTabHost, this.mTabHost.newTabSpec("Tab1").setIndicator("Home"), (tabInfo = new TabInfo("Tab1", TabFragment1.class, args))); 
     this.mapTabInfo.put(tabInfo.tag, tabInfo); 
     MainActivity.AddTab(this, this.mTabHost, this.mTabHost.newTabSpec("Tab2").setIndicator("Messages"), (tabInfo = new TabInfo("Tab2", TabFragment2.class, args))); 
     this.mapTabInfo.put(tabInfo.tag, tabInfo); 
     MainActivity.AddTab(this, this.mTabHost, this.mTabHost.newTabSpec("Tab3").setIndicator("Search"), (tabInfo = new TabInfo("Tab3", TabFragment3.class, args))); 
     this.mapTabInfo.put(tabInfo.tag, tabInfo); 
     MainActivity.AddTab(this, this.mTabHost, this.mTabHost.newTabSpec("Tab4").setIndicator("Profile"), (tabInfo = new TabInfo("Tab4", TabFragment4.class, args))); 
     this.mapTabInfo.put(tabInfo.tag, tabInfo); 
     MainActivity.AddTab(this, this.mTabHost, this.mTabHost.newTabSpec("Tab5").setIndicator("Settings"), (tabInfo = new TabInfo("Tab5", TabFragment5.class, args))); 
     this.mapTabInfo.put(tabInfo.tag, tabInfo); 
     mTabHost.setOnTabChangedListener(this); 
    } 

    private static void AddTab(MainActivity activity, TabHost tabHost, TabHost.TabSpec tabSpec, TabInfo tabInfo) { 
     tabSpec.setContent(activity.new TabFactory(activity)); 
     tabHost.addTab(tabSpec); 
    } 

    public void onTabChanged(String tag) { 
     int pos = this.mTabHost.getCurrentTab(); 
     this.mViewPager.setCurrentItem(pos); 
    } 

    public void onPageScrolled(int position, float positionOffset, 
      int positionOffsetPixels) { 
     // TODO Auto-generated method stub 
    } 

    public void onPageSelected(int position) { 
     // TODO Auto-generated method stub 
     this.mTabHost.setCurrentTab(position); 
    } 

    public void onPageScrollStateChanged(int state) { 
     // TODO Auto-generated method stub 
    } 
} 

我做了什麼至今導致選項卡DISAPEAR和REAPEAR當我點擊他們：

public void onPageSelected(int position) { 
    // TODO Auto-generated method stub 
    this.mTabHost.setCurrentTab(position); 

    this.hScrollView = (HorizontalScrollView)super.findViewById(R.id.scroller); 
    this.hScrollView.scrollTo(((int)(mTabHost.getWidth() * (position/((double)(mTabHost.getChildCount() - 1))))), 0); 
} 

Answer 1

我不知道答案，但this guy爲你正在做的事情實現了一個開源庫。希望有所幫助！

Answer 2

我修好了，感謝喬希（見他的回答評論！）。非常感謝Josh！

它現在的工作很好，這是我使用它的代碼：

public void onPageSelected(int position) { 
    // TODO Auto-generated method stub 
    this.mTabHost.setCurrentTab(position); 
    this.hScrollView = (HorizontalScrollView)super.findViewById(R.id.scroller); 
    this.hScrollView.scrollTo(((int)(mTabHost.getWidth() * (position/((double)(4 - 1))))), 0); 
}