如何顯示列表中的一個項目的視圖並隱藏其他項目。

Question

我有一個回收站視圖列表。我正在顯示另一個佈局，點擊它的父項目佈局。

現在，當我點擊列表中的項目時，它顯示了所有項目的視圖，現在我想讓佈局只顯示已點擊的項目，並使其不再顯示其他項目。

佈局細節應該只在點擊一個項目時纔可見，並且只能被點擊的項目。

佈局：

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:card_view="http://schemas.android.com/apk/res-auto" 

    android:id="@+id/lay_row" 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    android:layout_centerInParent="false" 
    android:orientation="vertical"> 

    <android.support.v7.widget.CardView 
     xmlns:app="http://schemas.android.com/tools" 
     android:id="@+id/card_view" 
     app:cardUseCompatPadding="true" 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:layout_marginBottom="05dp" 
     android:layout_marginTop="05dp" 
     card_view:cardElevation="12dp"> 

     <RelativeLayout 
      android:layout_width="match_parent" 
      android:layout_height="60dp" 
      android:background="@color/bg"> 

      <View 
       android:layout_width="3dp" 
       android:layout_height="match_parent" 
       android:background="@color/cardLineColor"></View> 

      <LinearLayout 
       android:id="@+id/linearLayout6" 
       android:layout_width="match_parent" 
       android:layout_height="wrap_content" 
       android:layout_centerVertical="true" 
       android:layout_marginEnd="10dp" 
       android:layout_marginLeft="10dp" 
       android:layout_marginRight="10dp" 
       android:layout_marginStart="10dp" 
       android:orientation="vertical"> 

       <TextView 
        android:id="@+id/txt_id" 
        android:layout_width="103dp" 
        android:layout_height="wrap_content" 
        android:text="ID" 
        android:textColor="@color/white" /> 

       <TextView 
        android:id="@+id/txt_date" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:layout_marginTop="05dp" 
        android:text="23/3/2015" 
        android:textColor="@color/textColor" 
        android:textSize="10sp" /> 


      </LinearLayout> 

      <TextView 
       android:id="@+id/txt_trans_type" 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:layout_alignTop="@+id/linearLayout6" 
       android:layout_centerHorizontal="true" 
       android:text="sent money" 
       android:textColor="@color/white" 
       android:textStyle="bold" /> 

      <LinearLayout 
       android:id="@+id/linearLayout8" 
       android:layout_width="match_parent" 
       android:layout_height="wrap_content" 
       android:layout_alignParentEnd="true" 
       android:layout_alignParentRight="true" 
       android:layout_alignTop="@+id/linearLayout6" 
       android:layout_marginEnd="10dp" 
       android:layout_marginLeft="10dp" 
       android:layout_marginRight="10dp" 
       android:layout_marginStart="10dp" 
       android:layout_toEndOf="@+id/txt_trans_type" 
       android:layout_toRightOf="@+id/txt_trans_type" 
       android:orientation="vertical"> 

       <TextView 
        android:id="@+id/txt_balance" 
        android:layout_width="match_parent" 
        android:layout_height="wrap_content" 
        android:layout_gravity="end" 
        android:text="$3214" 
        android:textAlignment="viewEnd" 
        android:textColor="@color/white" 
        android:textStyle="bold" /> 

       <TextView 
        android:layout_width="match_parent" 
        android:layout_height="wrap_content" 
        android:layout_gravity="end" 
        android:layout_marginTop="05dp" 
        android:text="@string/balance" 
        android:textAlignment="viewEnd" 
        android:textColor="@color/white" 
        android:textSize="10sp" /> 


      </LinearLayout> 
     </RelativeLayout> 


    </android.support.v7.widget.CardView> 

    <RelativeLayout 
     android:id="@+id/relativeLayout_detail" 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:visibility="gone"> 

     <RelativeLayout 
      android:id="@+id/relativeLayout1" 
      android:layout_width="match_parent" 
      android:layout_height="60dp" 
      android:layout_alignParentEnd="true" 
      android:layout_alignParentRight="true" 
      android:background="@drawable/trans_background"> 

      <View 
       android:id="@+id/view" 
       android:layout_width="2dp" 
       android:layout_height="match_parent" 
       android:layout_alignParentLeft="true" 
       android:layout_alignParentStart="true" 
       android:layout_alignParentTop="true" 
       android:layout_marginBottom="2dp" 
       android:layout_marginTop="2dp" 
       android:background="@color/cardLineColor1"></View> 

      <LinearLayout 
       android:id="@+id/linearLayout" 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:layout_alignParentLeft="true" 
       android:layout_alignParentStart="true" 
       android:layout_centerVertical="true" 
       android:layout_marginEnd="10dp" 
       android:layout_marginLeft="10dp" 
       android:layout_marginRight="10dp" 
       android:layout_marginStart="10dp" 
       android:layout_toLeftOf="@+id/linearLayout86" 
       android:layout_toStartOf="@+id/linearLayout86" 
       android:orientation="vertical"> 

       <TextView 
        android:id="@+id/txt_vendor" 
        android:layout_width="match_parent" 
        android:layout_height="wrap_content" 
        android:text="@string/vendor" 
        android:textColor="@color/lightGrey" /> 

       <TextView 
        android:id="@+id/txt" 
        android:layout_width="match_parent" 
        android:layout_height="wrap_content" 
        android:layout_marginTop="05dp" 
        android:text="@string/vendor" 
        android:textColor="@color/white" 
        android:textSize="10sp" /> 


      </LinearLayout> 

      <LinearLayout 
       android:id="@+id/linearLayout86" 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:layout_centerInParent="true" 
       android:layout_marginEnd="10dp" 
       android:layout_marginRight="10dp" 
       android:orientation="vertical"> 

       <TextView 
        android:id="@+id/txt_trans_id" 
        android:layout_width="match_parent" 
        android:layout_height="wrap_content" 
        android:text="ID" 
        android:textColor="@color/lightGrey" /> 

       <TextView 
        android:id="@+id/txt_7" 
        android:layout_width="match_parent" 
        android:layout_height="wrap_content" 
        android:layout_marginTop="05dp" 
        android:text="@string/transId" 
        android:textColor="@color/white" 
        android:textSize="10sp" /> 


      </LinearLayout> 
     </RelativeLayout> 

     <RelativeLayout 
      android:id="@+id/relativeLayout2" 
      android:layout_width="match_parent" 
      android:layout_height="60dp" 
      android:layout_alignParentLeft="true" 
      android:layout_alignParentStart="true" 
      android:layout_below="@+id/relativeLayout1" 
      android:background="@drawable/trans_background"> 

      <View 
       android:layout_width="2dp" 
       android:layout_height="match_parent" 
       android:layout_marginBottom="2dp" 
       android:layout_marginTop="2dp" 
       android:background="@color/cardLineColor1"></View> 

      <LinearLayout 
       android:id="@+id/linearLayout9" 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:layout_alignParentLeft="true" 
       android:layout_alignParentStart="true" 
       android:layout_centerVertical="true" 
       android:layout_marginEnd="10dp" 
       android:layout_marginLeft="10dp" 
       android:layout_marginRight="10dp" 
       android:layout_marginStart="10dp" 
       android:orientation="vertical"> 

       <TextView 
        android:id="@+id/txt_credit" 
        android:layout_width="match_parent" 
        android:layout_height="wrap_content" 
        android:text="$5858.0" 
        android:textColor="@color/lightGrey" /> 

       <TextView 
        android:id="@+id/txt5" 
        android:layout_width="match_parent" 
        android:layout_height="wrap_content" 
        android:layout_marginTop="05dp" 
        android:text="@string/credit" 
        android:textColor="@color/white" 
        android:textSize="10sp" /> 


      </LinearLayout> 
     </RelativeLayout> 
    </RelativeLayout> 
</LinearLayout> 

適配器：

public class TransactionHistoryListAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> { 

    private List<Transaction> transactionList; 
    private Context mContext; 
    static final int TYPE_LOAD_TRANS = 0; 



    public TransactionHistoryListAdapter(List<Transaction> transactionsList, Context context) { 
     this.mContext = context; 
     this.transactionList = transactionsList; 
    } 

    @Override 
    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { 
     RecyclerView.ViewHolder viewHolder = null; 
     LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
     switch (viewType) { 

      case TYPE_LOAD_TRANS: 
       View v_header = inflater.inflate(R.layout.transaction_item_layout, parent, false); 
       viewHolder = new TransactionHistoryListHolder(v_header); 
       break; 

     } 
     return viewHolder; 
    } 

    @Override 
    public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) { 

     if (getItemViewType(position) == TYPE_LOAD_TRANS) { 
      TransactionHistoryListHolder transsHolder = (TransactionHistoryListHolder) holder; 
      retriveAllTrans(transsHolder, position); 
     } else { 
     } 

    } 
    public void retriveAllTrans(final TransactionHistoryListHolder holder, final int position) { 


     final Transaction data = transactionList.get(position); 


     holder.txt_id.setText(data.getId()); 
     holder.txt_date.setText(data.getDate()); 
     holder.txt_trans_type.setText(data.getType()); 
     holder.txt_balance.setText(data.getBalance()); 


     holder.lay_row.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View view) { 

       holder.relativeLayout.setVisibility(View.VISIBLE); 

      } 
     }); 

    } 

    @Override 
    public int getItemViewType(int position) { 

     Transaction obj = transactionList.get(position); 

     if (obj.typeToDisp == 0) { 
      return TYPE_LOAD_TRANS; 
     } 
     return super.getItemViewType(position); 
    } 

    @Override 
    public int getItemCount() { 
     return transactionList.size(); 
    } 
} 

，我們該怎麼辦呢？

編輯：

我試圖做的是這樣的：

public class TransactionHistoryListAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> { 

    public TransactionHistoryListAdapter(List<Transaction> transactionsList, Context context) { 
     this.mContext = context; 
     this.transactionList = transactionsList; 
    } 

    @Override 
    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { 
     RecyclerView.ViewHolder viewHolder = null; 
     LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
     switch (viewType) { 

      case TYPE_LOAD_TRANS: 
       View v_header = inflater.inflate(R.layout.transaction_item_layout, parent, false); 
       viewHolder = new TransactionHistoryListHolder(v_header); 
       break; 
     } 
     return viewHolder; 
    } 

    @Override 
    public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) { 
     final Transaction data = transactionList.get(position); 
     if (getItemViewType(position) == TYPE_LOAD_TRANS) { 


      TransactionHistoryListHolder transsHolder = (TransactionHistoryListHolder) holder; 

      if (data.isVisible()){ 
       transsHolder.relativeLayout.setVisibility(View.VISIBLE); 
      } else { 
       transsHolder.relativeLayout.setVisibility(View.GONE); 
      } 

      retriveAllTrans(transsHolder, position); 
     } else { 
     } 

    } 

    public void retriveAllTrans(final TransactionHistoryListHolder holder, final int position) { 


     final Transaction data = transactionList.get(position); 


     holder.txt_id.setText(data.getId()); 
     holder.txt_date.setText(data.getDate()); 
     holder.txt_trans_type.setText(data.getType()); 
     holder.txt_balance.setText(data.getBalance()); 


     holder.lay_row.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View view) { 



       if (data.isVisible()) { // initially it will be falsedata.setVisible(false); 

        data.setVisible(true); 
        holder.relativeLayout.setVisibility(View.VISIBLE); 
        notifyDataSetChanged(); 

       } else { 
        data.setVisible(false); 
        holder.relativeLayout.setVisibility(View.GONE); 
        notifyDataSetChanged(); 

       } 


      } 
     }); 


     for (int i=0;i< transactionList.size();i++) 
     { 
      if(i==position) { 
       data.setVisible(true); 
      } 
      else { 
       data.setVisible(false); 
      } 
     } 


    } 

    } 
    @Override 
    public int getItemViewType(int position) { 

     Transaction obj = transactionList.get(position); 

     if (obj.typeToDisp == 0) { 
      return TYPE_LOAD_TRANS; 
     } 

     return super.getItemViewType(position); 
    } 

    @Override 
    public int getItemCount() { 
     return transactionList.size(); 
    } 
} 

它不工作了。

請幫忙。謝謝..

Answer 1

在模型中維護標誌以保持視圖狀態並只在條件滿足您的模型時才顯示。爲了您在您的交易模型參考聲明欄這樣

public class Transaction { 
..... 
boolean isVisible; 

public void setIsVisible(boolean isVisible){ 
    this.isVisible = isVisible; 
    } 

public boolean isVisible(){ 
    return isVisible; 
} 
} 

然後在你的內心onClickListener適配器類設置的標誌像這樣

holder.lay_row.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View view) { 
      if (data.isVisble()) { // initially it will be false 
      data.setIsVisible(false); 
      holder.relativeLayout.setVisibility(View.GONE); 
      } else { 
      data.setIsVisible(true); 
      holder.relativeLayout.setVisibility(View.Visible); 
      } 

     } 
    }); 

這將顯示你的觀點，但在滾動的意見將被回收和設置爲默認狀態，所以要解決這個問題，你必須更新內部onBindView

您的視圖狀態

@Override 
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) { 
    final Transaction data = transactionList.get(position); 
    if (getItemViewType(position) == TYPE_LOAD_TRANS) { 
     if (data.isVisible()){ 
     holder.relativeLayout.setVisibility(View.VISIBLE); 
     } else { 
     holder.relativeLayout.setVisibility(View.GONE); 
     } 
     TransactionHistoryListHolder transsHolder = (TransactionHistoryListHolder) holder; 
     retriveAllTrans(transsHolder, position); 
    } else { 
    } 

} 

這將解決您的問題