如何創建顯示單擊RecyclerView的元素的片段？

Question

我是Android新手，所以也許我只是缺乏理解工作方式。

所以我現在所擁有的是五行元素的RecyclerView。它們每個都包含不同形狀的圖形，不同的水果名稱和不同的顏色條。

我追求的是創建Fragment，根據Recyclerview元素用戶點擊的內容，在該圖中顯示一些背景顏色，圖形和水果名稱。我怎樣才能做到這一點？

MyAdapter類象下面這樣：

public class MyAdapter extends RecyclerView.Adapter <MyAdapter.MyViewHolder> { 


    Context context; 
    ArrayList<Information> data; 

    public MyAdapter(Context context, ArrayList<Information> data) { 
     this.context = context; 
     this.data = data; 
    } 

    @Override 
    public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { 
     View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.custom_row,parent,false); 
     MyViewHolder holder = new MyViewHolder(view); 
     return holder; 
    } 

    @Override 
    public void onBindViewHolder(final MyViewHolder holder, final int position) { 
     holder.textView.setText(data.get(position).title); 
     holder.relativeLayout.setBackground(context.getResources().getDrawable(data.get(position).shape)); 
     holder.textView2.setBackground(context.getResources().getDrawable(data.get(position).color)); 

    } 

    @Override 
    public int getItemCount() { 
     return data.size(); 
    } 
    class MyViewHolder extends RecyclerView.ViewHolder { 

     TextView textView,textView2; 
     RelativeLayout relativeLayout; 

     public MyViewHolder(View itemView) { 
      super(itemView); 
      textView = (TextView) itemView.findViewById(R.id.txt_view); 
      relativeLayout = (RelativeLayout) itemView.findViewById(R.id.img_view); 
      textView2 = (TextView) itemView.findViewById(R.id.textView); 

     } 
    } 
} 

MyActivity.java

public class MyActivity extends AppCompatActivity { 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_my); 
     RecyclerView recyclerView = (RecyclerView) findViewById(R.id.recycler_view); 
     MyAdapter adapter = new MyAdapter(this, Data.getData(this)); 
     recyclerView.setAdapter(adapter); 
     recyclerView.setLayoutManager(new GridLayoutManager(this,1)); 

} 
} 

Fragment_layout.java

public class FragmentLayout extends Fragment { 

@Nullable 
@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { 
    return inflater.inflate(R.layout.fragment_layout, container, false); 
} 
} 

activity_my.xml

<?xml version="1.0" encoding="utf-8"?> 
<android.support.design.widget.CoordinatorLayout 
xmlns:android="http://schemas.android.com/apk/res/android" 
xmlns:app="http://schemas.android.com/apk/res-auto" 
android:layout_width="match_parent" 
android:layout_height="match_parent" 
android:fitsSystemWindows="true" 
> 

<android.support.v7.widget.RecyclerView 
    android:id="@+id/recycler_view" 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content"> 

</android.support.v7.widget.RecyclerView> 
</android.support.design.widget.CoordinatorLayout> 

和fragment_layout.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
xmlns:tools="http://schemas.android.com/tools" 
android:id="@+id/fragment_layout" 
android:layout_width="match_parent" 
android:layout_height="match_parent" 
android:paddingLeft="@dimen/activity_horizontal_margin" 
android:paddingRight="@dimen/activity_horizontal_margin" 
android:paddingTop="@dimen/activity_vertical_margin" 
android:paddingBottom="@dimen/activity_vertical_margin" 
> 


<RelativeLayout 
    android:id="@+id/fragment_img" 
    android:layout_width="100dp" 
    android:layout_height="100dp" 
    android:layout_gravity="center" 
    android:rotation="180" 
    android:layout_centerVertical="true" 
    android:layout_centerHorizontal="true"> 

    <TextView 
     android:id="@+id/fragment_text" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:rotation="180" 
     android:textSize="20sp" 
     android:layout_centerVertical="true" 
     android:layout_centerHorizontal="true" /> 
</RelativeLayout> 


</RelativeLayout> 

Answer 1

你需要在你的ViewHolder爲ItemView控件創建onClickListener。然後，您可以使用適配器位置獲取所需的詳細信息，並將它們傳遞給您希望顯示的新片段。如下面的例子。

`

class MyViewHolder extends RecyclerView.ViewHolder implements` View.OnClickListener { 

     TextView textView,textView2; 
     RelativeLayout relativeLayout; 

     public MyViewHolder(View itemView) { 
      super(itemView); 
      textView = (TextView) itemView.findViewById(R.id.txt_view); 
      relativeLayout = (RelativeLayout) itemView.findViewById(R.id.img_view); 
      textView2 = (TextView) itemView.findViewById(R.id.textView); 

      itemView.setOnClickListener(this); 

     } 

     @Override 
     public void onClick(View v) 
     { 
       FruitDetailFragment detailFragment = FruitDetailFragment.newInstance(fruits.get(getAdapterPosition()).getTitle(), 
         fruits.get(getAdapterPosition()).getcolor()); 

       getActivity().getSupportFragmentManager().beginTransaction().replace(R.id.my_container, detailFragment, 
         getString(R.string.fruit_detail_fragment_tag)).addToBackStack("FRUIT_DETAILS").commit(); 
     } 
    }