まず、親の親に対してremoveView（）を呼び出す必要があります。このエラーを取り除く方法は？

Question

私は、アクティビティから別のアクティビティに移動するために明示的なインテントを使用するこのシンプルなアプリケーションを作成しました。

それは（例えばFamilyActivityにMainActivityから移動）すべての活動のために正常に動作しますが、それはNumbersActivityにMainActivityから移動するために来て、それがこのLogCatを表示するとき、それは中華鍋ない：

09-05 08:04:02.518 26820-26820/com.example.android.miwok E/AndroidRuntime: FATAL EXCEPTION: main 
                     java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.android.miwok/com.example.android.miwok.NumbersActivity}: java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first. 
                      at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2372) 
                      at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2424) 
                      at android.app.ActivityThread.access$600(ActivityThread.java:162) 
                      at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1364) 
                      at android.os.Handler.dispatchMessage(Handler.java:107) 
                      at android.os.Looper.loop(Looper.java:194) 
                      at android.app.ActivityThread.main(ActivityThread.java:5400) 
                      at java.lang.reflect.Method.invokeNative(Native Method) 
                      at java.lang.reflect.Method.invoke(Method.java:525) 
                      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:837) 
                      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:604) 
                      at dalvik.system.NativeStart.main(Native Method) 
                     Caused by: 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:3430) 
                      at android.view.ViewGroup.addView(ViewGroup.java:3301) 
                      at android.view.ViewGroup.addView(ViewGroup.java:3246) 
                      at android.view.ViewGroup.addView(ViewGroup.java:3222) 
                      at com.example.android.miwok.NumbersActivity.onCreate(NumbersActivity.java:40) 
                      at android.app.Activity.performCreate(Activity.java:5122) 
                      at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1081) 
                      at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2336) 
                      at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2424)  
                      at android.app.ActivityThread.access$600(ActivityThread.java:162)  
                      at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1364)  
                      at android.os.Handler.dispatchMessage(Handler.java:107)  
                      at android.os.Looper.loop(Looper.java:194)  
                      at android.app.ActivityThread.main(ActivityThread.java:5400)  
                      at java.lang.reflect.Method.invokeNative(Native Method)  
                      at java.lang.reflect.Method.invoke(Method.java:525)  
                      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:837)  
                      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:604)  
                      at dalvik.system.NativeStart.main(Native Method)  

MainActivty.java

package com.example.android.miwok; 

import android.app.Activity; 
import android.content.Intent; 
import android.support.v7.app.AppCompatActivity; 
import android.os.Bundle; 
import android.view.View; 
import android.widget.TextView; 
import android.widget.Toast; 

public class MainActivity extends AppCompatActivity { 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 

     // Set the content of the view to use the activity main.xml 
     setContentView(R.layout.activity_main); 

     // Find the view that shows the numbers category 
     //TextView numbers = (TextView)findViewById(R.id.numbers); 

     // Find the view that shows the numbers category, then set a clickListener on it 
     TextView numbers= (TextView)findViewById(R.id.family); 
     numbers.setOnClickListener(new View.OnClickListener(){ 
      @Override 
      public void onClick(View view) { 
       Intent i = new Intent(MainActivity.this, NumbersActivity.class); 
       startActivity(i); 
      } 
     }); 

     // Repeat the same for other categories 
     TextView family= (TextView)findViewById(R.id.family); 
     family.setOnClickListener(new View.OnClickListener(){ 
      @Override 
      public void onClick(View view) { 
       Intent i = new Intent(MainActivity.this, FamilyMembersActivity.class); 
       startActivity(i); 
      } 
     }); 

     TextView colors = (TextView)findViewById(R.id.colors); 
     colors.setOnClickListener(new View.OnClickListener(){ 
      @Override 
      public void onClick(View view) { 
       Intent i = new Intent(MainActivity.this, ColorsActivity.class); 
       startActivity(i); 
      } 
     }); 

     TextView phrases = (TextView)findViewById(R.id.phrases); 
     phrases.setOnClickListener(new View.OnClickListener(){ 
      @Override 
      public void onClick(View view) { 
       Intent i = new Intent(MainActivity.this, PhrasesActivity.class); 
       startActivity(i); 
      } 
     }); 
    } 
} 

NumbersActivity.java

package com.example.android.miwok; 

import android.content.DialogInterface; 
import android.support.v7.app.AppCompatActivity; 
import android.os.Bundle; 
import android.util.Log; 
import android.view.View; 
import android.widget.LinearLayout; 
import android.widget.TextView; 
import android.widget.Toast; 

import java.util.ArrayList; 

public class NumbersActivity extends AppCompatActivity { 

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

MainActivity.xml

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:tools="http://schemas.android.com/tools" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:background="@color/tan_background" 
    android:orientation="vertical" 
    tools:context="com.example.android.miwok.MainActivity"> 

    <TextView 
     android:id="@+id/numbers" 
     style="@style/CategoryStyle" 
     android:background="@color/category_numbers" 
     android:text="@string/category_numbers" /> 

    <TextView 
     android:id="@+id/family" 
     style="@style/CategoryStyle" 
     android:background="@color/category_family" 
     android:text="@string/category_family" /> 

    <TextView 
     android:id="@+id/colors" 
     style="@style/CategoryStyle" 
     android:background="@color/category_colors" 
     android:text="@string/category_colors" /> 

    <TextView 
     android:id="@+id/phrases" 
     style="@style/CategoryStyle" 
     android:background="@color/category_phrases" 
     android:text="@string/category_phrases" /> 

</LinearLayout> 

あなたがプログラム的に追加している

<?xml version="1.0" encoding="utf-8"?> 
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    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" 
    tools:context="com.example.android.miwok.NumbersActivity"> 
</RelativeLayout> 

Answer 1

NumbersAtivity.xmlビューはどこか別の場所に追加されています。

このエラーは、ループ内で最も頻繁に発生し、同じ繰り返しが各繰り返し内で使用されます。