RecyclerView崩溃的应用程序（由于新的设计库？）

我想填充我的RecyclerView与列表和我的应用程序崩溃与“这个孩子已经有一个父母”的错误。现在我认为它可能与新的android studio和新的设计库有关。RecyclerView崩溃的应用程序（由于新的设计库？）

我曾尝试都假的，真正的争论，同时呼吁RecyclerView适配器

这里的充气方法是我的代码：

活动：

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(); 
    } 
}

错误日志：

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

来源

2016-02-17 Roee

从不使用'LayoutInflater.from（）'绑定到活动的东西。在托管'Activity'上调用'getLayoutInflater（）'并使用它。 – CommonsWare

嗨@CommonsWare我得到了答案，这不是布局充气器，但我想听听更多有关充气器问题，是不是所有的视图绑定到一个活动？ – Roee

也我不明白如何获得托管活动的布局inflater – Roee

你膨胀的视图，但随后仅存储其子视图一个在你的持有人：

@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; 
}

一个ViewHolder应与代表显示整个项目的根视图被实例化。在你的情况下，这应该是“v”。这是滚动时添加并移除到RecyclerView的内容。然后，您可以挑选其中的其他视图，并将其存储为会员以便快速轻松地访问。

来源

2016-02-17 01:38:58

非常感谢！我将LinearLayout传递给super，并添加了TextView作为变量，它的工作原理 – Roee

如果你能接受这个答案为正确的答案，我将不胜感激（不只是upvote）。 –

正如Doug stevenson所解释的那样，我膨胀了一个视图但只传递了文本视图。这里是更改后的代码

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(); 
    } 
}

来源

2016-02-17 02:49:09 Roee

通常，ViewHolder子类将根据传递的根视图来确定哪些视图转到哪些成员。没有理由需要在onCreateViewHolder（）中做到这一点。毕竟，这是ViewHolder的责任。（请参阅http://developer.android.com/reference/android/support/v7/widget/RecyclerView.ViewHolder.html中的javadoc） –

RecyclerView崩溃的应用程序（由于新的设计库？）

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