Hangi parça seçildi?

Question

Parçalar kullanarak bir sekme uygulaması oluşturuyorum.

Başarıyla oluşturulmuş sekmeler oluşturdum, ancak şimdi belirli bir parça seçildiğinde bir nesne oluşturmam gerekiyor. Örneğin. SettingsTab'u seçtiğimde, Test class'da tanımlanan bir işlevi çağırmam gerekiyor. ve benzer İşte

// SettingsTab 
package com.example.sensorspositioningn; 

import android.app.Fragment; 
import android.os.Bundle; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 

public class SettingsTab extends Fragment { 

    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { 
     // Inflate the layout for this fragment 
     return inflater.inflate(R.layout.settingstab, container, false); 

    } 
} 

MainActivity içinde kodudur yok:

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


     appContext = getApplicationContext(); 

     //ActionBar 
     ActionBar actionbar = getActionBar(); 
     actionbar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS); 

     ActionBar.Tab Tab1= actionbar.newTab().setText("Tab1"); 
     ActionBar.Tab Tab2= actionbar.newTab().setText("Tab2"); 
     ActionBar.Tab Tab3= actionbar.newTab().setText("Tab3"); 
     ActionBar.Tab SettingsTab = actionbar.newTab().setText("Settings"); 

     Fragment Tab1F= new Tab1(); 
     Fragment Tab2F= new Tab2(); 
     Fragment Tab3F= new Tab3(); 
     Fragment mSettingsFragment = new SettingsTab(); 

     Tab1.setTabListener(new MyTabsListener(Tab1F)); 
     Tab1.setTabListener(new MyTabsListener(Tab2F)); 
     Tab1.setTabListener(new MyTabsListener(Tab3F)); 
     SettingsTab.setTabListener(new MyTabsListener(mSettingsFragment)); 

     actionbar.addTab(Tab1); 
     actionbar.addTab(Tab2); 
     actionbar.addTab(Tab3); 
     actionbar.addTab(SettingsTab); 


    } 
protected void onSaveInstanceState(Bundle outState) { 
     super.onSaveInstanceState(outState); 
     outState.putInt("tab", getActionBar().getSelectedNavigationIndex()); 
    } 

class MyTabsListener implements ActionBar.TabListener { 
     public Fragment fragment; 

     public MyTabsListener(Fragment fragment) { 
      this.fragment = fragment; 
     } 


     public void onTabReselected(Tab tab, FragmentTransaction ft) { 
      Toast.makeText(MainActivity.appContext, "Reselected!", Toast.LENGTH_LONG).show(); 
     } 


     public void onTabSelected(Tab tab, FragmentTransaction ft) { 
      ft.replace(R.id.fragment_container, fragment); 




     } 


     public void onTabUnselected(Tab tab, FragmentTransaction ft) { 
      ft.remove(fragment); 


     } 
    } 

Answer 1

- Bunu buldum

class MyTabsListener implements ActionBar.TabListener { 
    public Fragment fragment; 

    public MyTabsListener(Fragment fragment) { 
     this.fragment = fragment; 
    } 


    public void onTabReselected(Tab tab, FragmentTransaction ft) { 
     Toast.makeText(MainActivity.appContext, "Reselected!", Toast.LENGTH_LONG).show(); 
    } 


    public void onTabSelected(Tab tab, FragmentTransaction ft) { 
     ft.replace(R.id.fragment_container, fragment); 

     if(fragment instanceof SettingsTab) { 
      // Create your object, call your function 
     } 
    } 


    public void onTabUnselected(Tab tab, FragmentTransaction ft) { 
     ft.remove(fragment); 

     if(fragment instanceof SettingsTab) { 
      // Destroy your object 
     } 
    } 
} 

Answer 2

bu

public void onTabSelected(Tab tab, FragmentTransaction ft) { 
     ft.replace(R.id.fragment_container, fragment); 

     if(fragment instanceof SettingsTab){ 
      doSettingsMethod(); 
     } 

     if(fragment instanceof Tab1){ 
      doOtherMethod1(); 
     } 

     if(fragment instanceof Tab2){ 
      doOtherMethod2(); 
     } 

     if(fragment instanceof Tab3){ 
      doOtherMethod3(); 
     } 
    } 

Ayrıca bu şekilde TabListener sınıfını değiştirebilir deneyin. Benim için daha iyi bir tasarım. Bunu edebilirsiniz ActionBar.TabListener yılında

class MyTabsListener implements ActionBar.TabListener { 
    public Fragment fragment; 
    private final Runnable onSelect; 

    public MyTabsListener(Fragment fragment) { 
     this.fragment = fragment; 
     this.onSelect = null; 
    } 

    public MyTabsListener(Fragment fragment, Runnable onSelect) { 
     this.fragment = fragment; 
     this.onSelect = onSelect; 
    } 


    public void onTabReselected(Tab tab, FragmentTransaction ft) { 
     Toast.makeText(MainActivity.appContext, "Reselected!", Toast.LENGTH_LONG).show(); 
    } 


    public void onTabSelected(Tab tab, FragmentTransaction ft) { 
     ft.replace(R.id.fragment_container, fragment); 
     if(onSelect != null){ 
      fragment.getActivity().runOnUiThread(onSelect); 
     } 
    } 


    public void onTabUnselected(Tab tab, FragmentTransaction ft) { 
     ft.remove(fragment); 


    } 
} 

Answer 3

tek resmi kaynağı (Sana Activity olması nesneyi gerektiğini varsayarak) geliştirici oldu site: http://developer.android.com/training/implementing-navigation/lateral.html

Sadece oluşturulan her parça için bağımsız değişkenler koyarlar ve fragmanlar seçildiğinde bağımsız değişkenleri okurlar.

Answer 4

Varsayılan olarak, bir sekmeyi seçerseniz, vurgulanır. Açık olarak seçmek isterseniz, belirtilen yorumlanmış kodu, belirtilen sekme dizin konumunuzla onTabSelected (TabLayout.Tab sekmesi) altında kullanın. Bu kod, viewpager kullanılarak sekme seçilen konumdaki değişiklik fragmanını açıklayacaktır.

public class GalleryFragment extends Fragment implements TabLayout.OnTabSelectedListener 
{ 
private ViewPager viewPager;public ViewPagerAdapter adapter;private TabLayout tabLayout; 
@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup container, 
         Bundle savedInstanceState) { 
View rootView = inflater.inflate(R.layout.fragment_gallery, container, false); 
viewPager = (ViewPager) rootView.findViewById(R.id.viewpager); 
adapter = new ViewPagerAdapter(getChildFragmentManager()); 
adapter.addFragment(new PaymentCardFragment(), "PAYMENT CARDS"); 
adapter.addFragment(new LoyaltyCardFragment(), "LOYALTY CARDS"); 
viewPager.setAdapter(adapter); 
tabLayout = (TabLayout) rootView.findViewById(R.id.tabs); 
    tabLayout.setupWithViewPager(viewPager); 
    tabLayout.setOnTabSelectedListener(this); 
} 

@Override 
public void onTabSelected(TabLayout.Tab tab) { 
    //This will be called 2nd when you select a tab or swipe using viewpager 
    final int position = tab.getPosition(); 
    Log.i("card", "Tablayout pos: " + position); 
    //TabLayout.Tab tabdata=tabLayout.getTabAt(position); 
    //tabdata.select(); 
    tabLayout.post(new Runnable() { 
     @Override 
     public void run() { 
      if (position == 0) { 
       PaymentCardFragment paymentCardFragment = getPaymentCardFragment(); 
       if (paymentCardFragment != null) { 
        VerticalViewpager vp = paymentCardFragment.mypager; 
        if(vp!=null) 
        { 
         //vp.setCurrentItem(position,true); 
         vp.setCurrentItem(vp.getAdapter().getCount()-1,true); 
        } 
        } 
      } 
      if (position == 1) { 
       LoyaltyCardFragment loyaltyCardFragment = getLoyaltyCardFragment(); 
       if (loyaltyCardFragment != null) { 
        VerticalViewpager vp = loyaltyCardFragment.mypager; 
        if(vp!=null) 
        { 
         vp.setCurrentItem(position); 
        } 
        } 
      } 
     } 
    }); 
} 

@Override 
public void onTabUnselected(TabLayout.Tab tab) { 
//This will be called 1st when you select a tab or swipe using viewpager 
} 
@Override 
public void onTabReselected(TabLayout.Tab tab) { 
    //This will be called only when you select the already selected tab(Ex: selecting 3rd tab again and again) 
} 
private PaymentCardFragment getLoyaltyCardFragment() { 
    Fragment f = adapter.mFragmentList.get(viewPager.getCurrentItem()); 

    if(f instanceof PaymentCardFragment) 
    { 
    return (PaymentCardFragment) f; 
    } 
    return null; 
} 
private LoyaltyCardFragment getPaymentCardFragment() { 
    Fragment f = adapter.mFragmentList.get(viewPager.getCurrentItem()); 
    if(f instanceof LoyaltyCardFragment) 
    { 
    return (LoyaltyCardFragment) f; 
    } 
    return null; 
} 
    class ViewPagerAdapter extends FragmentPagerAdapter { 
    public List<Fragment> mFragmentList = new ArrayList<>(); 
    private final List<String> mFragmentTitleList = new ArrayList<>(); 
    public void addFragment(Fragment fragment, String title) { 
    mFragmentList.add(fragment); 
    mFragmentTitleList.add(title); 
    } 
} 
}