如何在碎片

實現搜索查看我寫了下面的代碼：如何在碎片

public class TabFragment extends Fragment { 
@Override 
    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) { 
     super.onCreateOptionsMenu(menu, inflater); 
     getActivity().getMenuInflater().inflate(R.menu.menu_main, menu); 

     // Associate searchable configuration with the SearchView 
     SearchManager searchManager = (SearchManager) getActivity().getSystemService(Context.SEARCH_SERVICE); 
     SearchView searchView = (SearchView) menu.findItem(R.id.action_search).getActionView(); 
     Log.d("Tab", "SearchManager: " + searchManager + " : " + searchView); 
     searchView.setSearchableInfo(searchManager.getSearchableInfo(getActivity().getComponentName())); 
    } 
}

---------------------------- EDITED -------------------------------------

@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setHasOptionsMenu(true); 
}

守則menu.xml

<item 
     android:id="@+id/action_search" 
     android:actionViewClass="android.support.v7.widget.SearchView" 
     android:icon="@drawable/search_icon" 
     android:title="Search" 
     app:showAsAction="always|collapseActionView" />

當我運行我的代碼時，我牛逼都將拋出NullPointerException在

searchView.setSearchableInfo(searchManager.getSearchableInfo(getActivity().getComponentName()));

這意味着我在

了空值

SearchView searchView = (SearchView) menu.findItem(R.id.action_search).getActionView();

例外是：

java.lang.NullPointerException 
      at com.ushatek.pustakbazaar.fragment.TabFragment.onCreateOptionsMenu(TabFragment.java:168) 
      at android.support.v4.app.Fragment.performCreateOptionsMenu(Fragment.java:2047) 
      at android.support.v4.app.FragmentManagerImpl.dispatchCreateOptionsMenu(FragmentManager.java:2125) 
      at android.support.v4.app.FragmentController.dispatchCreateOptionsMenu(FragmentController.java:270) 
      at android.support.v4.app.FragmentActivity.onCreatePanelMenu(FragmentActivity.java:299) 
      at android.support.v7.internal.view.WindowCallbackWrapper.onCreatePanelMenu(WindowCallbackWrapper.java:85) 
      at android.support.v7.app.AppCompatDelegateImplBase$AppCompatWindowCallbackBase.onCreatePanelMenu(AppCompatDelegateImplBase.java:243) 
      at android.support.v7.internal.view.WindowCallbackWrapper.onCreatePanelMenu(WindowCallbackWrapper.java:85) 
      at android.support.v7.internal.app.ToolbarActionBar.populateOptionsMenu(ToolbarActionBar.java:448) 
      at android.support.v7.internal.app.ToolbarActionBar$1.run(ToolbarActionBar.java:65) 
      at android.os.Handler.handleCallback(Handler.java:605) 
      at android.os.Handler.dispatchMessage(Handler.java:92) 
      at android.os.Looper.loop(Looper.java:137) 
      at android.app.ActivityThread.main(ActivityThread.java:4456) 
      at java.lang.reflect.Method.invokeNative(Native Method) 
      at java.lang.reflect.Method.invoke(Method.java:511) 
      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:787) 
      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:554) 
      at dalvik.system.NativeStart.main(Native Method)

我有經歷的所以每個問題。但我仍然堅持。

來源

2015-11-20 Android Boy

確保您正在充氣正確的菜單xml。 –

我很確定這一點。 –

嘗試提供吹氣來代替

getActivity().getMenuInflater().inflate(R.menu.menu_main, menu);

這種說法可能像下面......

inflater.inflate(R.menu.menu_main, menu);

和第二件事是覆蓋片段的onCreate()寫setHasOptionsMenu(true);它應該是這樣的...

@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setHasOptionsMenu(true); 
}

希望它會h ELP。

來源

2015-11-21 07:31:00 Khan

對不起，已經實施。但還沒有工作。 –

回答

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