安卓：無法膨脹activity_main由於它

Question

同時啓動應用程序，它之後立即崩潰（我已經添加了所有需要的地方引用）我得到這三個錯誤添加片段：

android.view.InflateException: Binary XML file line #29: Error inflating class fragment 
Caused by: android.view.InflateException: Binary XML file line #29: Error inflating class fragment 
Caused by: java.lang.IllegalStateException: Fragment com.tifinnearme.priteshpatel.materialdrawer.NavigationFragment did not create a view. 

這裏是Mainactivity.java

package com.tifinnearme.priteshpatel.materialdrawer; 

import android.content.Intent; 
import android.support.v4.widget.DrawerLayout; 
import android.support.v7.app.ActionBarActivity; 
import android.os.Bundle; 
import android.support.v7.widget.Toolbar; 
import android.view.Menu; 
import android.view.MenuItem; 


public class MainActivity extends ActionBarActivity { 
Toolbar toolbar; 
@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 
    toolbar=(Toolbar)findViewById(R.id.app_bar); 
    setSupportActionBar(toolbar); 

    getSupportActionBar().setHomeButtonEnabled(true); 
    //Create object for drawer layout 

    NavigationFragment navFrag=  (NavigationFragment)getSupportFragmentManager().findFragmentById(R.id.drawer_fragment); 
    DrawerLayout drawerLayout=(DrawerLayout)findViewById(R.id.drawer_layout);//Get the object of drawer layout 

    navFrag.setUp(R.id.drawer_fragment,drawerLayout,toolbar); 
} 


@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_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; 
    } 
    if(id==R.id.navigate) 
    { 
     startActivity(new Intent(this,Subactivity.class)); 
    } 

    return super.onOptionsItemSelected(item); 
} 
} 

NavigationFragment.java

package com.tifinnearme.priteshpatel.materialdrawer; 


import android.content.Context; 
import android.content.SharedPreferences; 
import android.os.Bundle; 
import android.support.v4.app.Fragment; 
import android.support.v4.widget.DrawerLayout; 
import android.support.v7.app.ActionBarDrawerToggle; 
import android.support.v7.widget.Toolbar; 
import android.view.View; 


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

public static final String PREF_FILE_NAME="testprefs"; 
public static final String KEY_USER_LEARNED_DRAWER="User learned drawer"; 
private ActionBarDrawerToggle mDrawerToggle; 
private DrawerLayout mDrawerLayout; 
private boolean mUserLearnedDrawer;//indicate whether user has opened drawer first time or not(
private boolean mFromSavedInstanceState; 
private View containerView; 
public NavigationFragment() { 
    // Required empty public constructor 
} 

@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    mUserLearnedDrawer=Boolean.valueOf(readFromPrefs(getActivity(), KEY_USER_LEARNED_DRAWER, "false"));//false indicates user doesn't know about drawer 
    if(savedInstanceState!=null){ 
     mFromSavedInstanceState=true; 
    } 
} 


public void setUp(int drawer_fragment, DrawerLayout drawerLayout, Toolbar toolbar) { 
    //Initialize the drawer layout and toggle 
    containerView=getActivity().findViewById(drawer_fragment); 
    mDrawerLayout=drawerLayout; 
    mDrawerToggle=new ActionBarDrawerToggle(getActivity(),mDrawerLayout,toolbar,R.string.drawer_open,R.string.drawer_close){ 
     @Override 
     public void onDrawerOpened(View drawerView) { 
      super.onDrawerOpened(drawerView); 
      if(!mUserLearnedDrawer) 
      { 
       mUserLearnedDrawer=true; 
       savedPreferences(getActivity(),KEY_USER_LEARNED_DRAWER,mUserLearnedDrawer+""); 
       //Save this value into our Key to indicate that user has seen drawer 
      } 
      getActivity().invalidateOptionsMenu();//It creates Actionbar again when drawer toggles 


     } 

     @Override 
     public void onDrawerClosed(View drawerView) { 
      super.onDrawerClosed(drawerView); 
      getActivity().invalidateOptionsMenu(); 
     } 
    }; 
    if(!mUserLearnedDrawer && !mFromSavedInstanceState) 
    { 
     mDrawerLayout.openDrawer(containerView); 
    } 
    mDrawerLayout.setDrawerListener(mDrawerToggle); 
} 
public static void savedPreferences(Context context,String prefName,String prefValue){ 
    SharedPreferences sharedPrefs=context.getSharedPreferences(PREF_FILE_NAME,Context.MODE_PRIVATE); 
    SharedPreferences.Editor editor=sharedPrefs.edit(); 
    editor.putString(prefName,prefValue); 
    /*editor.commit();*///It wait for the operation to become successful 
    editor.apply();//It doesn't wait for the operation to become successful 
} 
public static String readFromPrefs(Context context,String prefName,String prefDefaultValue){ 
    SharedPreferences getPrefs=context.getSharedPreferences(PREF_FILE_NAME,Context.MODE_PRIVATE); 
    return getPrefs.getString(prefName,prefDefaultValue); 
} 
} 

activity_ main.xml中

<android.support.v4.widget.DrawerLayout  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:id="@+id/drawer_layout" 
android:layout_width="match_parent" 
android:layout_height="match_parent"> 

<RelativeLayout 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    tools:context=".MainActivity"> 

    <include 
     android:id="@+id/app_bar" 
     layout="@layout/app_bar"></include> 

    <TextView 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_below="@+id/app_bar" 
     android:text="@string/hello_world" /> 
</RelativeLayout> 

<fragment 
    android:id="@+id/drawer_fragment" 
    android:name="com.tifinnearme.priteshpatel.materialdrawer.NavigationFragment" 
    android:layout_width="240dp" 
    android:layout_height="match_parent" 
    android:layout_gravity="start" 
    app:layout="@layout/fragment_navigation" 
    tools:layout="@layout/fragment_navigation" /> 


</android.support.v4.widget.DrawerLayout> 

編輯：重複的問題並沒有解決我的問題。我仍然有同樣的問題。如果任何人都可以提供幫助，那就太棒了。謝謝！

Answer 1

更改：

<fragment 
android:id="@+id/drawer_fragment" 
android:name="com.tifinnearme.priteshpatel.materialdrawer.NavigationFragment" 
android:layout_width="240dp" 
android:layout_height="match_parent" 
android:layout_gravity="start" 
app:layout="@layout/fragment_navigation" 
tools:layout="@layout/fragment_navigation" /> 

是：

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

那麼你的片段添加到content_frame：

FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction(); 
    fragmentTransaction 
      .replace(R.id.content_frame, new your_fragment) 
      .commit(); 

的