java.lang.IllegalArgumentException：id 0x7f0c007bのビューが見つかりません

Question

私はAppプロジェクトを開始しようとしましたが、次のエラーが表示されます。

ここで私が見つけた答えからたくさん試しましたが、間違いは見つかりませんでした。ここで

が出力されます。ここでは

 
E/AndroidRuntime: FATAL EXCEPTION: main 
        Process: de.christian_heinisch.tiercheckliste, PID: 28372 
        java.lang.IllegalArgumentException: No view found for id 0x7f0c007b (de.christian_heinisch.tiercheckliste:id/relativeLayout_for_About) for fragment AboutFragment{5abcffb #0 id=0x7f0c007b} 
         at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1102) 
         at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1290) 
         at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:801) 
         at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1677) 
         at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:536) 
         at android.os.Handler.handleCallback(Handler.java:739) 
         at android.os.Handler.dispatchMessage(Handler.java:95) 
         at android.os.Looper.loop(Looper.java:148) 
         at android.app.ActivityThread.main(ActivityThread.java:5466) 
         at java.lang.reflect.Method.invoke(Native Method) 
         at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 
         at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 
I/Process: Sending signal. PID: 28372 SIG: 9 
Application terminated. 

は私MainActivityある

ここ

package de.christian_heinisch.tiercheckliste; 

import android.os.Bundle; 
import android.support.design.widget.FloatingActionButton; 
import android.support.design.widget.Snackbar; 
import android.support.v4.app.FragmentManager; 
import android.support.v4.app.FragmentTransaction; 
import android.view.View; 
import android.support.design.widget.NavigationView; 
import android.support.v4.view.GravityCompat; 
import android.support.v4.widget.DrawerLayout; 
import android.support.v7.app.ActionBarDrawerToggle; 
import android.support.v7.app.AppCompatActivity; 
import android.support.v7.widget.Toolbar; 
import android.view.Menu; 
import android.view.MenuItem; 
import android.widget.Toast; 

public class MainActivity extends AppCompatActivity 
     implements NavigationView.OnNavigationItemSelectedListener { 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 
     Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); 
     setSupportActionBar(toolbar); 

     FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab); 
     fab.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View view) { 
       Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG) 
         .setAction("Action", null).show(); 
      } 
     }); 

     DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout); 
     ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
       this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close); 
     drawer.addDrawerListener(toggle); 
     toggle.syncState(); 

     NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view); 
     navigationView.setNavigationItemSelectedListener(this); 
    } 

    @Override 
    public void onBackPressed() { 
     DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout); 
     if (drawer.isDrawerOpen(GravityCompat.START)) { 
      drawer.closeDrawer(GravityCompat.START); 
     } else { 
      super.onBackPressed(); 
     } 
    } 

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

    @SuppressWarnings("StatementWithEmptyBody") 
    @Override 
    public boolean onNavigationItemSelected(MenuItem item) { 
     // Handle navigation view item clicks here. 
     int id = item.getItemId(); 

     if (id == R.id.nav_pet_about) { 

     } else if (id == R.id.nav_pet_info) { 

     } else if (id == R.id.nav_pet_checklist) { 

     } else if (id == R.id.nav_info) { 

      AboutFragment aboutFragment = new AboutFragment(); 
      FragmentTransaction manager = getSupportFragmentManager().beginTransaction(); 
      manager.replace(R.id.relativeLayout_for_About, aboutFragment); 
      manager.addToBackStack(null); 
      manager.commit(); 

     } 

     DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout); 
     drawer.closeDrawer(GravityCompat.START); 
     return true; 
    } 
} 

は私のfragment_about.xml

<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" 
    tools:context="de.christian_heinisch.tiercheckliste.AboutFragment" 
    android:id="@+id/relativeLayout_for_About"> 

    <!-- TODO: Update blank fragment layout --> 
    <TextView 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     android:text="@string/hello_blank_fragment" /> 

</RelativeLayout> 

されており、ここで私のAboutFragment.java

です

package de.christian_heinisch.tiercheckliste; 


import android.os.Bundle; 
import android.support.v4.app.Fragment; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 


/** 
* A simple {@link Fragment} subclass. 
*/ 
public class AboutFragment extends Fragment { 


    public AboutFragment() { 
     // Required empty public constructor 
    } 


    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, 
          Bundle savedInstanceState) { 
     // Inflate the layout for this fragment 
     return inflater.inflate(R.layout.fragment_about, container, false); 
    } 

} 

何が悪いと思いますか？

Answer 1

A FragmentTransactionあなたFragmentとあなたのActivity階層内Viewを置き換えます。 ID R.id.relativeLayout_for_AboutのViewは、お客様のFragmentに使用しているレイアウトにあり、Activityのレイアウトではありません。あなたはAboutFragmentを表示するあなたのR.layout.activity_mainでViewを追加します。

<FrameLayout android:id="@+id/placeholder_about" 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content"/> 

次に、あなたのAboutFragmentでこれViewを置き換える：

Fragment fragment = new AboutFragment(); 

getSupportFragmentManager().beginTransaction() 
     .replace(R.id.placeholder_about, fragment).addToBackStack(null).commit(); 

あなたはDeveloper Training docsにこのパラダイムについての詳細を読むことができます。