錯誤-Didn't發現類「android.support.v4.widget

-4

這是我的主要activity.xml錯誤-Didn't發現類「android.support.v4.widget

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


     <FrameLayout android:layout_width="wrap_content" 
        android:layout_height="match_parent"> 


      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 

      <android.support.v7.widget.Toolbar 
       android:id="@+id/toolbar" 
       android:layout_width="match_parent" 
       android:layout_height="wrap_content" 
       app:popupTheme="@style/ThemeOverlay.AppCompat.Light" 
       app:theme="@style/Theme.AppCompat.Light.DarkActionBar"/> 

     </FrameLayout> 

     <fragment 
      android:id="@+id/fragment.navigation.drawer" 
      android:name="piestudio.zine.NavigationDrawerFragment" 
      android:layout_width="280dp" 
      android:layout_height="match_parent" 
      android:layout_gravity="start" 
      app:layout="@layout/fragment_navigation_drawer" 
      tools:layout="@layout/fragment_navigation_drawer"/> 



    </android.support.v4.widget.> 



</LinearLayout>

主要activity.java

`package piestudio.zine;

import android.os.Bundle; 
import android.support.v4.widget.DrawerLayout; 
import android.support.v7.app.AppCompatActivity; 
import android.view.Menu; 

public class MainActivity extends AppCompatActivity{ 
    public boolean onCreateOptionsMenu(Menu menu) { 
     getMenuInflater().inflate(R.menu.drawer,menu); 
     return true; 
    } 

    public android.support.v7.widget.Toolbar toolbar; 


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

     toolbar = (android.support.v7.widget.Toolbar) findViewById(R.id.toolbar); 
     setSupportActionBar(toolbar); 
     getSupportActionBar().setDisplayShowHomeEnabled(true); 



     NavigationDrawerFragment drawerFragment = (NavigationDrawerFragment) 
       getSupportFragmentManager().findFragmentById(R.id.fragment_navigation_drawer); 
     drawerFragment.setUP(R.id.fragment_navigation_drawer,(DrawerLayout) findViewById(R.id.drawer_layout),toolbar);} 



}

導航抽屜活性

`包piestudio.zine;

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.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 


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

    public static final String PREF_FILE_NAME = "testpref"; 
    public static final String KEY_USER_LEARNED_DRAWER="user_learned_drawer"; 
    private ActionBarDrawerToggle mDrawerToggle; 
    private DrawerLayout mDrawerLayout; 
    private View containerView; 
    private boolean mUserLearnedDrawer; 
    private boolean mFromSavedInstanceState; 


    public NavigationDrawerFragment() { 


     // Required empty public constructor 
    } 

    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     mUserLearnedDrawer=Boolean.valueOf(readFromPreferences(getActivity(),KEY_USER_LEARNED_DRAWER,"false")); 
     if(savedInstanceState!=null){ 

      mFromSavedInstanceState=true; 
     } 


    } 

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

    } 


    public void setUP(int fragmentId, DrawerLayout drawerLayout, final Toolbar toolbar) { 
     containerView=getActivity().findViewById(fragmentId); 

     mDrawerLayout = drawerLayout; 
     mDrawerToggle = new ActionBarDrawerToggle(getActivity(), drawerLayout, toolbar, R.string.drawer_open, R.string.drawer_close) { 

      @Override 
      public void onDrawerOpened(View drawerView) { 
       super.onDrawerOpened(drawerView); 

       if (mUserLearnedDrawer){ 
        mUserLearnedDrawer=true; 
        saveToPreferences(getActivity(),KEY_USER_LEARNED_DRAWER,mUserLearnedDrawer+""); 
       } 

       getActivity().invalidateOptionsMenu(); 
      } 

      @Override 
      public void onDrawerClosed(View drawerView) { 
       super.onDrawerClosed(drawerView); 
       getActivity().invalidateOptionsMenu(); 


      } 

      @Override 
      public void onDrawerSlide(View drawerView, float slideOffset) { 
       if (slideOffset<0.8){ 
       toolbar.setAlpha(1-slideOffset);} 
      } 
     }; 

     if (!mUserLearnedDrawer&&!mFromSavedInstanceState){ 


      mDrawerLayout.openDrawer(containerView); 

     } 
     mDrawerLayout.setDrawerListener(mDrawerToggle); 
     mDrawerLayout.post(new Runnable() { 
      @Override 
      public void run() { 
       mDrawerToggle.syncState(); 

      } 
     }); 


    } 


    public static void saveToPreferences(Context context, String preferenceName, String preferenceValue) { 

     SharedPreferences sharedPreferences = context.getSharedPreferences(PREF_FILE_NAME, Context.MODE_PRIVATE); 
     SharedPreferences.Editor editor = sharedPreferences.edit(); 
     editor.putString(preferenceName, preferenceValue); 
     editor.apply(); 
    } 

    public static String readFromPreferences(Context context, String preferenceName, String defaultValue) { 

     SharedPreferences sharedPreferences = context.getSharedPreferences(PREF_FILE_NAME, Context.MODE_PRIVATE); 
     return sharedPreferences.getString(preferenceName,defaultValue); 
    } 

}

錯誤

Caused by: android.view.InflateException: Binary XML file line #11: Error inflating class android.support.v4.widget. at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:707) at android.view.LayoutInflater.rInflate(LayoutInflater.java:755) at android.view.LayoutInflater.inflate(LayoutInflater.java:492) at android.view.LayoutInflater.inflate(LayoutInflater.java:397) at android.view.LayoutInflater.inflate(LayoutInflater.java:353) at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:276) at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:136) at piestudio.zine.MainActivity.onCreate(MainActivity.java:21) at android.app.Activity.performCreate(Activity.java:5133) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261) at android.app.ActivityThread.access$600(ActivityThread.java:141) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loop(Looper.java:137) at android.app.ActivityThread.main(ActivityThread.java:5103) 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:737) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) at dalvik.system.NativeStart.main(Native Method) Caused by: java.lang.ClassNotFoundException: Didn't find class "android.support.v4.widget." on path: DexPathList[[zip file "/data/app/piestudio.zine-1.apk"],nativeLibraryDirectories=[/data/app-lib/piestudio.zine-1, /system/lib]] at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:53) at java.lang.ClassLoader.loadClass(ClassLoader.java:501) at java.lang.ClassLoader.loadClass(ClassLoader.java:461) at android.view.LayoutInflater.createView(LayoutInflater.java:559) at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:696) at android.view.LayoutInflater.rInflate(LayoutInflater.java:755) at android.view.LayoutInflater.inflate(LayoutInflater.java:492) at android.view.LayoutInflater.inflate(LayoutInflater.java:397) at android.view.LayoutInflater.inflate(LayoutInflater.java:353) at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:276) at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:136) at piestudio.zine.MainActivity.onCreate(MainActivity.java:21) at android.app.Activity.performCreate(Activity.java:5133) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261) at android.app.ActivityThread.access$600(ActivityThread.java:141) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loop(Looper.java:137) at android.app.ActivityThread.main(ActivityThread.java:5103) 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:737) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) at dalvik.system.NativeStart.main(Native Method)

我的應用程序沒有啓動，並給我強制關閉每次的logcat的我在模擬器中運行它。請幫助我。我正在做所有這些以獲取導航抽屜上的項目（列表），您還可以指出代碼中的任何錯誤:)。雖然logcat顯示錯誤的## - 沒有找到類「android.support.v4.widget。##我不能解決這個錯誤

來源

2016-07-01 abhishek atre