IllegalStateException當嘗試添加視圖（）與複合視圖

Question

我試圖讓一個LinearLayout被添加到主Activity視圖時，按下按鈕。

注意之前試着用merge我用LinearLayout具有相同的結果。我讀了這post這使我的事情merge將幫助。我想添加的View的XML看起來像這樣。

<?xml version="1.0" encoding="utf-8"?> 
<merge xmlns:android="http://schemas.android.com/apk/res/android" 
android:orientation="horizontal" 
android:layout_width="match_parent" 
android:layout_height="match_parent" 
android:id="@+id/grocery_list_row"> 

    <EditText 
     android:hint="Price" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" /> 

    <EditText 
     android:hint="Item" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" /> 

    <CheckBox 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" /> 
</merge> 

此View化java看起來像這樣

package com.example.developer.grocerylist.impl; 

import android.content.Context; 
import android.util.AttributeSet; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.widget.LinearLayout; 

import com.example.developer.grocerylist.R; 

/** 
* Created by developer on 8/16/2015. 
*/ 
public class GroceryListTableRowImpl extends LinearLayout { 

    int mRows; 

    public GroceryListTableRowImpl(Context context) { 
     this(context, null); 
    } 

    public GroceryListTableRowImpl(Context context, AttributeSet attributeSet) { 
     super(context, attributeSet); 
    } 

    public GroceryListTableRowImpl(Context context, AttributeSet attributeSet, int defStyles) { 
     super(context, attributeSet, defStyles); 
    } 

    public void addRow(){ 
     mRows++; 
     removeAllViews(); 
     for(int i = 0; i < mRows; i++){ 
      addView(createRow()); 
     } 
    } 

    private View createRow() { 
     View v; 
     LayoutInflater inflater = LayoutInflater.from(getContext()); 
     v = inflater.inflate(R.layout.grocery_list_row,this,true); 
     return v; 
    } 
} 

主要Activity的XML看起來像這樣

<TableLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:tools="http://schemas.android.com/tools" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_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" 
    tools:context=".GroceryList" 
    android:id="@+id/list_table"> 

    <com.example.developer.grocerylist.impl.GroceryListTableRowImpl 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:id="@+id/grocery_list"> 

    </com.example.developer.grocerylist.impl.GroceryListTableRowImpl> 


    <TableRow 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content"> 
     <DigitalClock 
      android:textSize="20pt" 
      android:layout_height="wrap_content" 
      android:layout_width="fill_parent"/> 
    </TableRow> 

    <TableRow 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content"> 
     <TextView 
      android:id="@+id/textview" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:minWidth="250px" 
      android:textSize="20pt" 
      android:paddingBottom="5px" 
      android:text="" 
      android:background="#777777" 
      android:textColor="#ff0000" /> 

     <Button 
      android:id="@+id/add" 
      android:text="add" /> 
    </TableRow> 
</TableLayout> 

最後主要Activity的Java

package com.example.developer.grocerylist.activities; 

import android.os.Bundle; 
import android.support.v7.app.AppCompatActivity; 
import android.view.Menu; 
import android.view.MenuItem; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.view.ViewGroup; 
import android.widget.Button; 
import android.widget.EditText; 
import android.widget.TableLayout; 
import android.widget.TextView; 

import com.example.developer.grocerylist.R; 
import com.example.developer.grocerylist.api.GroceryListTableRow; 
import com.example.developer.grocerylist.impl.GroceryListTableRowImpl; 


public class GroceryList extends AppCompatActivity implements OnClickListener { 

    TextView textView = null; 
    GroceryListTableRowImpl groceryListTableRow = null; 
    Button add = null; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_grocery_list); 

     textView = (TextView)findViewById(R.id.textview); 
     groceryListTableRow = (GroceryListTableRowImpl)findViewById(R.id.grocery_list); 
     add = (Button)findViewById(R.id.add); 
     add.setOnClickListener(this); 
    } 

    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
     // Inflate the menu; this adds items to the action bar if it is present. 
     getMenuInflater().inflate(R.menu.menu_grocery_list, menu); 
     return true; 
    } 

    @Override 
    public boolean onOptionsItemSelected(MenuItem item) { 
     // Handle action bar item clicks here. The action bar will 
     // automatically handle clicks on the Home/Up button, so long 
     // as you specify a parent activity in AndroidManifest.xml. 
     int id = item.getItemId(); 

     //noinspection SimplifiableIfStatement 
     if (id == R.id.action_settings) { 
      return true; 
     } 

     return super.onOptionsItemSelected(item); 
    } 

    @Override 
    public void onClick(View v) { 
     groceryListTableRow.addRow(); 
    } 
} 

當我啓動應用程序，並單擊該按鈕，我得到這個

Process: com.example.developer.grocerylist, PID: 2353 
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:3936) 
     at android.view.ViewGroup.addView(ViewGroup.java:3786) 
     at android.view.ViewGroup.addView(ViewGroup.java:3727) 
     at android.view.ViewGroup.addView(ViewGroup.java:3700) 
     at com.example.developer.grocerylist.impl.GroceryListTableRowImpl.addRow(GroceryListTableRowImpl.java:34) 
     at com.example.developer.grocerylist.activities.GroceryList.onClick(GroceryList.java:61) 
     at android.view.View.performClick(View.java:4780) 
     at android.view.View$PerformClick.run(View.java:19866) 
     at android.os.Handler.handleCallback(Handler.java:739) 
     at android.os.Handler.dispatchMessage(Handler.java:95) 
     at android.os.Looper.loop(Looper.java:135) 
     at android.app.ActivityThread.main(ActivityThread.java:5257) 
     at java.lang.reflect.Method.invoke(Native Method) 
     at java.lang.reflect.Method.invoke(Method.java:372) 
     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903) 
     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698) 

我知道這是很多參加。我一直在抓我的頭就這一個。我以前從未做過複合視圖。這可能很明顯。任何幫助將不勝感激。提前致謝！

UPDATE調試時，當我到達​​行事情失敗。它似乎並沒有進入createRow()方法。

Answer 1

按我的觀察你的createRow（）方法變化中，並嘗試這個東西

ViewGroup parent = (ViewGroup)v.Parent; 
return parent 

，因爲你已經使用合併有父ViewGroup中，所以要麼返回父視圖或刪除使用

父

parent.RemoveView(v); 
return v; 

Answer 2

感謝@ njkz2

什麼固定的這對我來說是改變我onCreate()方法。

private View createRow() { 
    View v; 
    LayoutInflater inflater = LayoutInflater.from(getContext()); 
    v = inflater.inflate(R.layout.grocery_list_row,this,false); 
    return v; 
} 

而且我改變類以擴展TableLayout而不是LinearLayout以獲得所需的效果。這是因爲我在我的GroceryListTableRowImpl中添加了複合視圖（這是一個LinearLayout）。所以GroceryListTableRowImpl需要是TableLayout。