RecyclerView崩潰的應用程序（由於新的設計庫？）

我想填充我的RecyclerView與列表和我的應用程序崩潰與「這個孩子已經有一個父母」的錯誤。現在我認爲它可能與新的android studio和新的設計庫有關。RecyclerView崩潰的應用程序（由於新的設計庫？）

我曾嘗試都假的，真正的爭論，同時呼籲RecyclerView適配器

這裏的充氣方法是我的代碼：

活動：

RecyclerView usersRecyclerView = (RecyclerView) findViewById(R.id.users_recyclerView); 
usersAdapter = new UsersAdapter(appUsers); 
usersRecyclerView.setHasFixedSize(true); 
RecyclerView.LayoutManager mLayoutManager = new LinearLayoutManager(this); 
usersRecyclerView.setLayoutManager(mLayoutManager); 
usersRecyclerView.setAdapter(usersAdapter);

activity.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" 
    xmlns:tools="http://schemas.android.com/tools" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:fitsSystemWindows="true" 
    tools:context="com.example.sarigbrand.japanesequickcourse.ChatActivity"> 

    <android.support.design.widget.AppBarLayout 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:theme="@style/AppTheme.AppBarOverlay"> 

     <android.support.v7.widget.Toolbar 
      android:id="@+id/toolbar" 
      android:layout_width="match_parent" 
      android:layout_height="?attr/actionBarSize" 
      android:background="?attr/colorPrimary" 
      app:popupTheme="@style/AppTheme.PopupOverlay" /> 

    </android.support.design.widget.AppBarLayout> 

    <include layout="@layout/content_chat" /> 

    <android.support.design.widget.FloatingActionButton 
     android:id="@+id/fab" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_gravity="bottom|end" 
     android:layout_margin="@dimen/fab_margin" 
     android:src="@android:drawable/ic_dialog_email" /> 

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

content_chat.xml：

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout 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" 
    android:paddingBottom="@dimen/activity_vertical_margin" 
    android:paddingLeft="@dimen/activity_horizontal_margin" 
    android:paddingRight="@dimen/activity_horizontal_margin" 
    android:paddingTop="@dimen/activity_vertical_margin" 
    app:layout_behavior="@string/appbar_scrolling_view_behavior" 
    tools:context="com.example.sarigbrand.japanesequickcourse.ChatActivity" 
    tools:showIn="@layout/activity_chat" 
    android:orientation="vertical"> 

    <TextView 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:text="@string/heb_loading" 
     android:id="@+id/loading_textView" 
     android:textColor="@color/colorRed500" 
     android:layout_gravity="center_horizontal" 
     android:textStyle="bold" 
     android:layout_marginTop="16dp"/> 

    <android.support.v7.widget.RecyclerView 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     android:scrollbars="vertical" 
     android:id="@+id/users_recyclerView"> 

    </android.support.v7.widget.RecyclerView> 
</LinearLayout>

UsersAdapter：

public class UsersAdapter extends RecyclerView.Adapter<UsersAdapter.UserHolder> { 

    ArrayList<AppUser> appUsers; 

    public UsersAdapter (ArrayList<AppUser> appUsers){ 
     this.appUsers = appUsers; 
    } 

    public static class UserHolder extends RecyclerView.ViewHolder { 
     public TextView userNameTV; 
     public UserHolder(TextView tv) { 
      super(tv); 
      userNameTV = tv; 
     } 
    } 

    @Override 
    public UsersAdapter.UserHolder onCreateViewHolder(ViewGroup parent, int viewType) { 

     View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.chat_user_list_view, parent, false); 
     TextView tv = (TextView) v.findViewById(R.id.user_name_textView); 
     UserHolder userHolder = new UserHolder(tv); 
     return userHolder; 
    } 

    @Override 
    public void onBindViewHolder(UserHolder holder, int position) { 
     AppUser user = appUsers.get(position); 
     holder.userNameTV.setText(user.userName); 
    } 


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

錯誤日誌：

FATAL EXCEPTION: main Process: com.example.sarigbrand.japanesequickcourse, PID: 8642 
java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first. 
at android.view.ViewGroup.addViewInner(ViewGroup.java:4309) 
at android.view.ViewGroup.addView(ViewGroup.java:4145) 
at android.view.ViewGroup.addView(ViewGroup.java:4086) 
at android.support.v7.widget.RecyclerView$5.addView(RecyclerView.java:585) 
at android.support.v7.widget.ChildHelper.addView(ChildHelper.java:107) 
at android.support.v7.widget.RecyclerView$LayoutManager.addViewInt(RecyclerView.java:6254) 
at android.support.v7.widget.RecyclerView$LayoutManager.addView(RecyclerView.java:6212) 
at android.support.v7.widget.RecyclerView$LayoutManager.addView(RecyclerView.java:6200) 
at android.support.v7.widget.LinearLayoutManager.layoutChunk(LinearLayoutManager.java:1384) 
at android.support.v7.widget.LinearLayoutManager.fill(LinearLayoutManager.java:1333) 
at android.support.v7.widget.LinearLayoutManager.onLayoutChildren(LinearLayoutManager.java:562) 
at android.support.v7.widget.RecyclerView.dispatchLayout(RecyclerView.java:2900) 
at android.support.v7.widget.RecyclerView.onLayout(RecyclerView.java:3071) 
at android.view.View.layout(View.java:16630) 
at android.view.ViewGroup.layout(ViewGroup.java:5437) 
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1743) 
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1586) 
at android.widget.LinearLayout.onLayout(LinearLayout.java:1495) 
at android.view.View.layout(View.java:16630) 
at android.view.ViewGroup.layout(ViewGroup.java:5437) 
at android.support.design.widget.CoordinatorLayout.layoutChild(CoordinatorLayout.java:1037) 
at android.support.design.widget.CoordinatorLayout.onLayoutChild(CoordinatorLayout.java:747) 
at android.support.design.widget.ViewOffsetBehavior.onLayoutChild(ViewOffsetBehavior.java:42) 
at android.support.design.widget.AppBarLayout$ScrollingViewBehavior.onLayoutChild(AppBarLayout.java:1156) 
at android.support.design.widget.CoordinatorLayout.onLayout(CoordinatorLayout.java:760) 
at android.view.View.layout(View.java:16630) 
at android.view.ViewGroup.layout(ViewGroup.java:5437) 
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:336) 
at android.widget.FrameLayout.onLayout(FrameLayout.java:273) 
at android.view.View.layout(View.java:16630) 
at android.view.ViewGroup.layout(ViewGroup.java:5437) 
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1743) 
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1586) 
at android.widget.LinearLayout.onLayout(LinearLayout.java:1495) 
at android.view.View.layout(View.java:16630) 
at android.view.ViewGroup.layout(ViewGroup.java:5437) 
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:336) 
at android.widget.FrameLayout.onLayout(FrameLayout.java:273) 
at android.view.View.layout(View.java:16630) 
at android.view.ViewGroup.layout(ViewGroup.java:5437) 
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1743) 
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1586) 
at android.widget.LinearLayout.onLayout(LinearLayout.java:1495) 
at android.view.View.layout(View.java:16630) 
at android.view.ViewGroup.layout(ViewGroup.java:5437) 
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:336) 
at android.widget.FrameLayout.onLayout(FrameLayout.java:273) 
at com.android.internal.policy.PhoneWindow$DecorView.onLayout(PhoneWindow.java:2678) 
at android.view.View.layout(View.java:16630) 
at android.view.ViewGroup.layout(ViewGroup.java:5437) 
at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2171) 
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1931) 
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1107) 
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6013) 
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:858) 
at android.view.Choreographer.doCallbacks(Choreographer.java:670) 
at android.vie

來源

2016-02-17 Roee

從不使用'LayoutInflater.from（）'綁定到活動的東西。在託管'Activity'上調用'getLayoutInflater（）'並使用它。 – CommonsWare

嗨@CommonsWare我得到了答案，這不是佈局充氣器，但我想聽聽更多有關充氣器問題，是不是所有的視圖綁定到一個活動？ – Roee

也我不明白如何獲得託管活動的佈局inflater – Roee

你膨脹的視圖，但隨後僅存儲其子視圖一個在你的持有人：

@Override 
public UsersAdapter.UserHolder onCreateViewHolder(ViewGroup parent, int viewType) { 
    View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.chat_user_list_view, parent, false); 
    TextView tv = (TextView) v.findViewById(R.id.user_name_textView); 
    // Make a holder that takes v in the constructor. 
    UserHolder userHolder = new UserHolder(tv); 
    return userHolder; 
}

一個ViewHolder應與代表顯示整個項目的根視圖被實例化。在你的情況下，這應該是「v」。這是滾動時添加並移除到RecyclerView的內容。然後，您可以挑選其中的其他視圖，並將其存儲爲會員以便快速輕鬆地訪問。

來源

2016-02-17 01:38:58

非常感謝！我將LinearLayout傳遞給super，並添加了TextView作爲變量，它的工作原理 – Roee

如果你能接受這個答案爲正確的答案，我將不勝感激（不只是upvote）。 –

正如Doug stevenson所解釋的那樣，我膨脹了一個視圖但只傳遞了文本視圖。這裏是更改後的代碼

public class UsersAdapter extends RecyclerView.Adapter<UsersAdapter.UserHolder> { 

    ArrayList<AppUser> appUsers; 

    public UsersAdapter (ArrayList<AppUser> appUsers){ 
     this.appUsers = appUsers; 
    } 

    public static class UserHolder extends RecyclerView.ViewHolder { 
     public LinearLayout linearLayout; 
     public TextView textView; 
     public UserHolder(LinearLayout layout, TextView tv) { 
      super(layout); 
      linearLayout = layout; 
      textView = tv; 
     } 
    } 

    @Override 
    public UsersAdapter.UserHolder onCreateViewHolder(ViewGroup parent, int viewType) { 
     LinearLayout layout = (LinearLayout) LayoutInflater.from(parent.getContext()).inflate(R.layout.chat_user_list_view, parent, false); 
     TextView tv = (TextView) layout.findViewById(R.id.user_name_textView); 
     UserHolder userHolder = new UserHolder(layout, tv); 
     return userHolder; 
    } 

    @Override 
    public void onBindViewHolder(UserHolder holder, int position) { 
     AppUser user = appUsers.get(position); 
     holder.textView.setText(user.userName); 
    } 

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

來源

2016-02-17 02:49:09 Roee

通常，ViewHolder子類將根據傳遞的根視圖來確定哪些視圖轉到哪些成員。沒有理由需要在onCreateViewHolder（）中做到這一點。畢竟，這是ViewHolder的責任。（請參閱http://developer.android.com/reference/android/support/v7/widget/RecyclerView.ViewHolder.html中的javadoc） –

RecyclerView崩潰的應用程序（由於新的設計庫？）

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