強制關閉，同時創造導覽

-3

我有一個抽屜式導航欄的代碼，但不工作
當我運行的應用程序強制關閉
對不起，如果我不能寫英文很好強制關閉，同時創造導覽

主要活動
有抽屜佈局代碼

public class List extends AppCompatActivity { 
DrawerLayout dl; 
ListView list; 
String[] item={"test","test2","test3","test4","test5","test6 "}; 
private Toolbar toolbar; 
@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.main); 
    list = (ListView)findViewById(R.id.list1); 
    dl=(DrawerLayout)findViewById(R.id.dl); 
    toolbar=(Toolbar) findViewById(R.id.app_bar_layout); 
    setSupportActionBar(toolbar); 
    getSupportActionBar().setDisplayShowHomeEnabled(true); 
    DraweLayoutFragment dl = (DraweLayoutFragment) getSupportFragmentManager().findFragmentById(R.id.fragment_navigation_drawer); 
    dl.setup((DrawerLayout)findViewById(R.id.drawerlayout),toolbar); 
    ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,R.layout.list_item,R.id.txt,item); 
    list.setAdapter(adapter); 
    list.setOnItemClickListener(new AdapterView.OnItemClickListener() { 
     @Override 
     public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 
      if (position==0){ 
       Intent intent = new Intent(List.this,biographi.class); 
       startActivity(intent); 
      }else if(position==1){ 
       Intent intent1 = new Intent(List.this,Rooidad.class); 
       startActivity(intent1); 
      }else if(position==2){ 
       Intent intent1 = new Intent(List.this,Asar.class); 
       startActivity(intent1); 
      } 
     } 
    }); 
} 
}

這是xml的主要活動。
存在用於導航抽屜在該XML片段

<android.support.v4.widget.DrawerLayout 
android:id="@+id/drawerlayout" 
xmlns:android="http://schemas.android.com/apk/res/android" 
xmlns:app="http://schemas.android.com/apk/res-auto" 
android:layout_width="match_parent" 
android:layout_height="match_parent" 
xmlns:tools="http://schemas.android.com/tools"> 

<RelativeLayout 
    xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:background="@drawable/mojabi" 
    android:layout_gravity="center"> 

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

    <ListView 
     android:id="@+id/list1" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:textAlignment="center" 
     android:dividerHeight="10dp" /> 
</RelativeLayout> 
<fragment 
    android:id="@+id/fragment_navigation_drawer" 
    android:layout_width="250dp" 
    android:layout_height="match_parent" 
    android:layout_gravity="start" 
    android:name="javadmojabi.ir.DraweLayoutFragment" 
    app:layout="@layout/fragment_drawe_layout" 
    tools:layout="@layout/fragment_drawe_layout" /> 

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

這CODS爲片段在主XML

public class DraweLayoutFragment extends Fragment { 
// TODO: Rename parameter arguments, choose names that match 
private DrawerLayout my_drawer_layout; 
private ActionBarDrawerToggle drawer_Toggle; 

public DraweLayoutFragment() { 
} 

@Nullable 
@Override 
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { 
    return super.onCreateView(inflater, container, savedInstanceState); 
} 

public void setup(DrawerLayout dl, Toolbar tl) { 
    my_drawer_layout = dl; 
    drawer_Toggle = new ActionBarDrawerToggle(getActivity(), dl, tl, R.string.drawer_open, R.string.drawer_close) { 
     @Override 
     public void onDrawerOpened(View drawerView) { 
      super.onDrawerOpened(drawerView); 
     } 
     @Override 
     public void onDrawerClosed(View drawerView) { 
      super.onDrawerClosed(drawerView); 
     } 
    }; 
    my_drawer_layout.addDrawerListener(drawer_Toggle); 
    } 
}

片段XML的這個碼

<FrameLayout 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=".DraweLayoutFragment"> 

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

logcat：

08-13 18:23:36.803 23245-23245/javadmojabi.ir E/AndroidRuntime: FATAL 
EXCEPTION: main 
                  Process: 
javadmojabi.ir, PID: 23245 

java.lang.RuntimeException: Unable to start activity 
ComponentInfo{javadmojabi.ir/javadmojabi.ir.List}: 
java.lang.NullPointerException: Attempt to invoke virtual method 'void 
android.support.v7.app.ActionBar.setDisplayShowHomeEnabled(boolean)' on a null 
object reference 
                   at 
android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2530) 
                   at 
android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2610) 
                   at 
android.app.ActivityThread.access$700(ActivityThread.java:181) 
                   at 
android.app.ActivityThread$H.handleMessage(ActivityThread.java:1476) 
                   at 
android.os.Handler.dispatchMessage(Handler.java:111) 
                   at 
android.os.Looper.loop(Looper.java:194) 
                   at 
android.app.ActivityThread.main(ActivityThread.java:5660) 
                   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:963) 
                   at 
com.android.internal.os.ZygoteInit.main(ZygoteInit.java:758) 
                  Caused by: 
java.lang.NullPointerException: Attempt to invoke virtual method 'void 
android.support.v7.app.ActionBar.setDisplayShowHomeEnabled(boolean)' on a 
null 
object reference 
                   at 
javadmojabi.ir.List.onCreate(List.java:30) 
                   at 
android.app.Activity.performCreate(Activity.java:6156) 
                   at 
android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1112) 
                   at 
android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2477) 
                   at 
android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2610)  
                   at 
android.app.ActivityThread.access$700(ActivityThread.java:181)  
                   at 
android.app.ActivityThread$H.handleMessage(ActivityThread.java:1476)  
                   at 
android.os.Handler.dispatchMessage(Handler.java:111)  
                   at 
android.os.Looper.loop(Looper.java:194)  
                   at 
android.app.ActivityThread.main(ActivityThread.java:5660)  
                   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:963)  
                    at 
com.android.internal.os.ZygoteInit.main(ZygoteInit.java:758)  
08-13 18:23:36.856 713-906/? E/WifiStateMachine: ConnectedState (when=-1ms 
what=147461!SCAN_RESULTS_EVENT 0 0 found=2 known=1 got=2 bcn=۰ con=۱ 
08-13 18:23:36.856 713-906/? E/WifiStateMachine: L2ConnectedState (when=-2ms 
what=147461!SCAN_RESULTS_EVENT 0 0 found=2 known=1 got=2 bcn=۰ con=۱

來源

2017-08-08 M.borjian

安置自己的logcat的和錯誤日誌 –

@HamidReza我sended –

你onCreateView應該返回片段XML

@Nullable 
@Override 
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { 
    View view = (FrameLayout) 
     inflater.inflate(R.layout.fragment, container, 
     false); 

    return view; 
}

來源

2017-08-08 06:30:43

它不工作 –

強制關閉，同時創造導覽

回答

相關問題