無法爲tabLayout添加選項卡

XML文件

<RelativeLayout 
android:id="@+id/main_layout" 
xmlns:android="http://schemas.android.com/apk/res/android" 
xmlns:app="http://schemas.android.com/apk/res-auto" 
xmlns:tools="http://schemas.android.com/tools" 
android:layout_width="match_parent" 
android:layout_height="match_parent" 
tools:context="com.dailam103.messagetimer.MainActivity"> 
<android.support.design.widget.TabLayout 
    android:id="@+id/tabs" 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    app:tabMode="fixed" 
    app:tabGravity="fill"/> 

<android.support.v4.view.ViewPager xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:tools="http://schemas.android.com/tools" 
    android:id="@+id/pager" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" > 
</android.support.v4.view.ViewPager> 
</RelativeLayout>

MainActivity.java

package com.dailam103.messagetimer; 
import android.os.Bundle; 
import android.support.v4.view.ViewPager; 
import android.support.v7.app.AppCompatActivity; 
import android.support.v7.widget.Toolbar; 
import android.support.design.widget.TabLayout; 
public class MainActivity extends AppCompatActivity { 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 
    TabLayout tabLayout = (TabLayout) findViewById(R.id.tabs); 
    tabLayout.addTab(tabLayout.newTab().setTag(1).setText("Tab 1")); 
    final ViewPager viewPager = (ViewPager) findViewById(R.id.pager); 
    final TabAdapter adapter = new TabAdapter(getSupportFragmentManager(), tabLayout.getTabCount()); 
    viewPager.setAdapter(adapter); 
    viewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout)); 
    tabLayout.setOnTabSelectedListener(new TabLayout.OnTabSelectedListener(){ 
     @Override 
     public void onTabSelected(TabLayout.Tab tab) { 
      viewPager.setCurrentItem(tab.getPosition()); 
     } 
     @Override 
     public void onTabUnselected(TabLayout.Tab tab) { 

     } 
     @Override 
     public void onTabReselected(TabLayout.Tab tab) { 
     } 
    }); 

} 
}

錯誤是在

tabLayout.addTab（tabLayout.newTab（）。setTag（1）.setText（「標籤1 「））;

請問爲什麼我不能將tab添加到tabLayout？

來源

2017-09-24 user3291316

郵政logcat的，而不是對話的圖像 –

你不需要像這樣長的代碼。

tabLayout.setOnTabSelectedListener(new TabLayout.OnTabSelectedListener(){ 
     @Override 
     public void onTabSelected(TabLayout.Tab tab) { 
      viewPager.setCurrentItem(tab.getPosition()); 
     } 
     @Override 
     public void onTabUnselected(TabLayout.Tab tab) { 

     } 
     @Override 
     public void onTabReselected(TabLayout.Tab tab) { 
     } 
    });

只需添加tabLayout.setupWithViewPager(viewPager);

或代碼，將是從任何地方設置tablayout有用。

public class ViewPagerBean { 
ViewPager viewPager; 
TabLayout tabLayout; 
ArrayList<TabBean> tabTitleList; 


public ViewPager getViewPager() { 
    return viewPager; 
} 

public void setViewPager(ViewPager viewPager) { 
    this.viewPager = viewPager; 
} 

public TabLayout getTabLayout() { 
    return tabLayout; 
} 

public void setTabLayout(TabLayout tabLayout) { 
    this.tabLayout = tabLayout; 
} 

public ArrayList<TabBean> getTabTitleList() { 
    return tabTitleList; 
} 

public void setTabTitleList(ArrayList<TabBean> tabTitleList) { 
    this.tabTitleList = tabTitleList; 
} 
} 

public class TabBean { 
int icon; 
int title; 
BaseFragment baseFragment; 

public TabBean(int icon, int title, BaseFragment baseFragment) { 
this.icon = icon; 
this.title = title; 
this.baseFragment = baseFragment; 
} 

public int getIcon() { 
return icon; 
} 

public void setIcon(int icon) { 
this.icon = icon; 
} 

public int getTitle() { 
return title; 
} 

public void setTitle(int title) { 
this.title = title; 
} 

public BaseFragment getBaseFragment() { 
return baseFragment; 
} 

public void setBaseFragment(BaseFragment baseFragment) { 
this.baseFragment = baseFragment; 
} 
}

我的所有碎片擴展爲BaseFragment。如果您在活動中需要tablayout，請將BaseFragment替換爲您的BaseActivity課程。

private TabLayout tabLayout; 
private ViewPager viewPagerImage; 

tabLayout = (TabLayout) fragmentView.findViewById(R.id.tabLayoutDefault); 
viewPagerImage = (ViewPager) fragmentView.findViewById(R.id.homeViewPager);

將此代碼寫入BaseFragment或BaseActivity類。

public void setViewPager(ViewPagerBean viewPagerBean) { 
ViewPager viewPager = viewPagerBean.getViewPager(); 
TabLayout tabLayout = viewPagerBean.getTabLayout(); 
FragmentManager fragmentManager = getFragmentManager(); 
PagerAdapter adapterMyEvents = new PagerAdapter(fragmentManager, 
viewPagerBean.getTabTitleList()); 
viewPager.setAdapter(adapterMyEvents); 
tabLayout.setupWithViewPager(viewPager); 
viewPager.setCurrentItem(0); 
setCustomTabView(viewPagerBean); 
} 

private void setCustomTabView(ViewPagerBean pagerBean) { 
for (int i = 0; i < pagerBean.getTabLayout().getTabCount(); i++) { 
TabLayout.Tab tab = pagerBean.getTabLayout().getTabAt(i); 
LinearLayout linearLayout = (LinearLayout) LayoutInflater.from(getActivity()).inflate(R.layout.tab_custom_layout, pagerBean.getTabLayout(), false); 
TextView tabTextView = (TextView) linearLayout.findViewById(R.id.tab_title); 
ImageView ivTabLeftIcon = (ImageView) linearLayout.findViewById(R.id.ivTabLeftIcon); 
TabBean tabBean = pagerBean.getTabTitleList().get(i); 

if (tabBean.getTitle() != 0) 
    tabTextView.setText(tabBean.getTitle()); 
if (tabBean.getIcon() != 0) 
    ivTabLeftIcon.setImageResource(tabBean.getIcon()); 
if (tab != null) { 
    tab.setCustomView(linearLayout); 
} 
} 
} 




private class PagerAdapter extends FragmentStatePagerAdapter { 

private ArrayList<TabBean> arrayList; 

public PagerAdapter(FragmentManager fm, ArrayList<TabBean> mTitles) { 
super(fm); 
this.arrayList = mTitles; 
} 

@Override 
public Fragment getItem(int position) { 
return arrayList.get(position).getBaseFragment(); 
} 


@Override 
public CharSequence getPageTitle(int position) { 
return getString(arrayList.get(position).getTitle()); 
} 


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

和使用這樣容易

 public ArrayList<TabBean> getUserHomeTabFragmentList() { 
     ArrayList<TabBean> arrayList = new ArrayList<>(); 

     FragmentHomeLunchList fragmentMenuLunch = new FragmentHomeLunchList(); 
     FragmentHomeDinnerList fragmentMenuDinner = new 
     FragmentHomeDinnerList(); 

     arrayList.add(new TabBean(R.drawable.ic_lunch, R.string.lunch, fragmentMenuLunch)); 
     arrayList.add(new TabBean(R.drawable.ic_dinner, R.string.dinner, fragmentMenuDinner)); 

     return arrayList; 
     } 

     private void setPagerAdapterWithTabLayout() { 
     ArrayList<TabBean> tabsList = UtilProject.getInstance().getList(); 
     ViewPagerBean viewPagerBean = new ViewPagerBean(); 
     viewPagerBean.setTabLayout(tabLayout); 
     viewPagerBean.setTabTitleList(tabsList); 
     viewPagerBean.setViewPager(viewPagerBottom); 
     setViewPager(viewPagerBean); 
     viewPagerBottom.addOnPageChangeListener(new ViewPager.OnPageChangeListener() { 
     @Override 
     public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) { 

     } 

     @Override 
     public void onPageSelected(int position) { 

     } 

     @Override 
     public void onPageScrollStateChanged(int state) { 

     } 
     }); 
     }

來源

2017-09-24 14:54:41 Khemraj

無法爲tabLayout添加選項卡

回答

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