Java 在Android中搜索不起作用
我已经为android的搜索功能挣扎了好几天了。无法精确定位错误Java 在Android中搜索不起作用,java,android,nullpointerexception,android-searchmanager,Java,Android,Nullpointerexception,Android Searchmanager,我已经为android的搜索功能挣扎了好几天了。无法精确定位错误 @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_exclude_list); ....... SearchView searchView = (SearchView)findView
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_exclude_list);
.......
SearchView searchView = (SearchView)findViewById(R.id.options_menu_main_search);
SearchManager searchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE);
if(null!=searchManager ) {
searchView.setSearchableInfo(searchManager.getSearchableInfo(getComponentName()));
}
handleIntent(getIntent());
}
@Override
public void onNewIntent(Intent intent) {
super.onNewIntent(intent);
setIntent(intent);
handleIntent(intent);
}
private void handleIntent(Intent intent) {
if (Intent.ACTION_SEARCH.equals(intent.getAction())) {
String query = intent.getStringExtra(SearchManager.QUERY);
Log.i("q",query);
}
}
searchable.xml
<searchable xmlns:android="http://schemas.android.com/apk/res/android"
android:hint="@string/search_hint"
android:includeInGlobalSearch="false"
android:label="@string/app_name"
android:searchSettingsDescription="@string/search_hint" />
第64行:searchView.setSearchableInfo(searchManager.getSearchableInfo(getComponentName())代码>
如果我删除
SearchView searchView = (SearchView)findViewById(R.id.options_menu_main_search);
SearchManager searchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE);
if(null!=searchManager ) {
searchView.setSearchableInfo(searchManager.getSearchableInfo(getComponentName()));
}
搜索正在工作,但当我在搜索中输入时,我无法获取/记录任何查询。您正在尝试初始化onCreate
方法中的MenuItem
。您应该在onCreateOptions菜单中将其初始化为:
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu, menu);
SearchView searchView = (SearchView) menu.findItem(R.id.options_menu_main_search).getActionView();
SearchManager searchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE);
if(null!=searchManager ) {
searchView.setSearchableInfo(searchManager.getSearchableInfo(getComponentName()));
}
}
请参阅文档中的主题,特别是配置搜索小部件部分。另外,由于您没有使用AppCompat
库,因此应该使用此类(如中所述):
第64行排除列表中的内容。java
?searchView
必须为空。你确定它在活动排除列表
布局中,并且id为:选项菜单\u主搜索
?你是否使用操作活动
作为活动扩展?@Fllo:不。只需公共类排除列表扩展活动{}
@好奇的编码器,更改不会有任何区别,因为你有一个NPE。您需要在创建选项菜单中初始化搜索视图。读同样的“非常感谢!!它正在工作。:)
Caused by: java.lang.NullPointerException
at com.xyz.Exclude_list.onCreate(Exclude_list.java:64)
SearchView searchView = (SearchView)findViewById(R.id.options_menu_main_search);
SearchManager searchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE);
if(null!=searchManager ) {
searchView.setSearchableInfo(searchManager.getSearchableInfo(getComponentName()));
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu, menu);
SearchView searchView = (SearchView) menu.findItem(R.id.options_menu_main_search).getActionView();
SearchManager searchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE);
if(null!=searchManager ) {
searchView.setSearchableInfo(searchManager.getSearchableInfo(getComponentName()));
}
}
android:actionViewClass="android.widget.SearchView"