Java 在android中设置搜索视图时遇到问题
下面我将介绍如何在android中设置UI以使用搜索视图。我从中复制并粘贴了它们,得到了一个Java 在android中设置搜索视图时遇到问题,java,android,nullpointerexception,android-menu,android-search,Java,Android,Nullpointerexception,Android Menu,Android Search,下面我将介绍如何在android中设置UI以使用搜索视图。我从中复制并粘贴了它们,得到了一个java.lang.NullPointerException 堆栈跟踪: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.support.v7.widget.SearchView.setSearchableInfo(android.app.SearchableInfo)' on a null ob
java.lang.NullPointerException
堆栈跟踪:
java.lang.NullPointerException: Attempt to invoke virtual method 'void android.support.v7.widget.SearchView.setSearchableInfo(android.app.SearchableInfo)' on a null object reference
at com.hb.birthpay.activity.FindFriendActivity.onCreateOptionsMenu(FindFriendActivity.java:75)
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.fragment_find_friend_menu, menu);
// Associate searchable configuration with the SearchView
SearchManager searchManager =
(SearchManager) getSystemService(Context.SEARCH_SERVICE);
SearchView searchView =
(SearchView) menu.findItem(R.id.action_search).getActionView();
searchView.setSearchableInfo(
searchManager.getSearchableInfo(getComponentName()));
return true;
}
searchable.xml:
<?xml version="1.0" encoding="utf-8"?>
<searchable xmlns:android="http://schemas.android.com/apk/res/android"
android:label="@string/app_name"
android:hint="Search people" />
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<item android:id="@+id/action_search"
android:title="Search"
android:icon="@drawable/ic_search_black_24dp"
app:showAsAction="collapseActionView|ifRoom"
android:actionViewClass="android.widget.SearchView" />
</menu>
导致nullPointerexception的原因是什么?如何修复它?尝试将getComponentName()替换为(this,YourActivity.class)尝试将getComponentName()替换为(this,YourActivity.class)发现重复项,请参阅找到重复项,请参阅getSearchableInfo(ComponentName ComponentName)不接受(this,YourActivity.class)作为参数。getSearchableInfo(ComponentName ComponentName)不接受(this,YourActivity.class)作为参数。