Android：如何更新裏面的viewpager裏面的片段裏面的recyclerview點擊按鈕

我有一個recyclerview裏面viewpager裏面的片段。我有viewpager之外的按鈕。點擊按鈕後如何更新recyclerview。Android：如何更新裏面的viewpager裏面的片段裏面的recyclerview點擊按鈕

public class Level2MainActivity_grid1 extends AppCompatActivity { 

protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.level2mainlayout_place1); 



     // I am putting a viewpager with fragments into them and put tabs 

     ViewPager viewPager = (ViewPager) findViewById(R.id.viewPager); 
     PagerAdapter pagerAdapter = new PagerAdapter(getSupportFragmentManager(), Titles, Numboftabs); 
     viewPager.setAdapter(pagerAdapter); 
     TabLayout tabLayout = (TabLayout) findViewById(R.id.tabLayout); 
     tabLayout.setupWithViewPager(viewPager); 



     Button buttonId = (Button) findViewById(R.id.planmytraveludupitown); 
     buttonId.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 

      //I want to save some things and do the changes in the recyclerview of tab 0; 

      } 
     }); 
    } 
}

在viewpager，在我使用recyclerview的標籤0 framgment代碼如下：

public class Udupiwhattosee extends Fragment { 

    private RecyclerView rv; 
    private List<Udupiwhattoseearray> udupiwhattoseearray; 


    @Override 
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { 
     RecyclerView v =(RecyclerView) inflater.inflate(R.layout.tab_1,container,false); 
     v.setLayoutManager(new LinearLayoutManager(getActivity())); 
     v.setHasFixedSize(true); 
     initializeData(); 
     WhattoseeRVAdapter adapter = new WhattoseeRVAdapter(udupiwhattoseearray,container.getContext()); 
     v.setAdapter(adapter); 
     return v; 
    } 


    private void initializeData(){ 
     udupiwhattoseearray = new ArrayList<>(); 
     udupiwhattoseearray.add(new Udupiwhattoseearray("Udupi Sri Krishna Temple", "Udupi, Karanata,INDIA", R.drawable.udupi)); 
     udupiwhattoseearray.add(new Udupiwhattoseearray("Udupi place 2", "Udupi, Karanata,INDIA", R.drawable.udup_krishna_math_gopura_udupi)); 
     udupiwhattoseearray.add(new Udupiwhattoseearray("Udupi Place 3", "Udupi, Karanata,INDIA", R.drawable.udupi_rath)); 
     udupiwhattoseearray.add(new Udupiwhattoseearray("Udupi place 4", "Udupi, Karanata,INDIA", R.drawable.udupi_window)); 
    }

來源

2015-12-09 Santhosh Yedidi

你可以使用一個標誌，比如'isRecyclerViewNeedUpdated'來表示你的'RecyclerView'是否需要更新。單擊按鈕時，將此標誌設置爲true。使用'ViewPage＃addOnPageChangeListener（...）'，這樣當你的目標'Fragment'被選中時，檢查標誌並在需要時更新'RecyclerView'。 –

recycler_view.post(new Runnable() { 
        public void run() { 
         adapter.notifyDataSetChanged(); 
        } 
       });

HERE你會看到界面的工作，試試這個希望其要正常工作

來源

2017-02-15 09:58:00

Android：如何更新裏面的viewpager裏面的片段裏面的recyclerview點擊按鈕

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