指定的孩子已經有父母。你必須調用removeView（）對兒童的父母第一次

Question

我想補充一個textview和checkbox到linearlayout觀點：

for(int i = 0 ; i < helperitems.size() ; ++i){ 
        final UserHelper u = helperitems.get(i); 


        runOnUiThread(new Runnable() { 
         @Override 
         public void run() { 

          LinearLayout linearLayout = new LinearLayout(ContentChatSendMessage.this); 
          linearLayout.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.FILL_PARENT, 
            LinearLayout.LayoutParams.WRAP_CONTENT)); 
          linearLayout.setOrientation(LinearLayout.HORIZONTAL); 
          linearLayout.setGravity(Gravity.RIGHT); 


          ViewGroup.LayoutParams txt_view_params = new ViewGroup.LayoutParams(
            ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); 

          CheckBox ch = new CheckBox(ContentChatSendMessage.this); 
          ch.setId(Integer.parseInt(u.getId())); 
          linearLayout.addView(ch); 

          TextView textView = new TextView(ContentChatSendMessage.this); 
          textView.setLayoutParams(txt_view_params); 
          textView.setText(u.getUsername1()); 
          linearLayout.addView(ch); 

          arr_chs.add(ch); 
          lay_lin_parent.addView(linearLayout); 

         } 
        }); 

       } 

我的佈局：

<LinearLayout 
... 

    <LinearLayout 
     android:id="@+id/lay_lin_parent" 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" 
     android:orientation="vertical" 
     android:layout_marginTop="10dp" 
     android:layout_marginRight="4dp" 
     android:layout_marginLeft="4dp"> 

    </LinearLayout> 
... 
</LinearLayout> 

，但我得到這個錯誤：

java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first. 

Answer 1

你的代碼試圖添加CheckBox ch到linearLayout兩次。循環中的第二個linearLayout.addView()呼叫應該是：linearLayout.addView(textView);。