android– 无法在 *** 作栏中获取SearchView

概述我已经尝试了很多教程,stackoverflow解决方案和google教程–>https://www.youtube.com/watch?v=9OWmnYPX1uc但是我无法在我的 *** 作栏中使用searchview来工作.有谁看到我做错了什么？我总是在searchView上得到nullpointerexception我对listview的活动：@Overridepublicboolean

我已经尝试了很多教程,stackoverflow解决方案和Google教程 – > https://www.youtube.com/watch?v=9OWmnYPX1uc但是我无法在我的 *** 作栏中使用searchvIEw来工作.

有谁看到我做错了什么？

我总是在searchVIEw上得到nullpointerexception

我对ListvIEw的活动：

@OverrIDepublic boolean onCreateOptionsMenu(Menu menu) {    // Inflate the menu; this adds items to the action bar if it is present.    getMenuInflater().inflate(R.menu.List_menu, menu);    MenuItem searchItem = menu.findItem(R.ID.action_search);    SearchVIEw searchVIEw = (SearchVIEw) MenuItemCompat.getActionVIEw(searchItem);    searchVIEw.setonqueryTextListener(            new SearchVIEw.OnqueryTextListener() {                @OverrIDe                public boolean onqueryTextsubmit(String query) {                    Toast.makeText(ContactListActivity.this, query, Toast.LENGTH_SHORT).show();                    return false;                }                @OverrIDe                public boolean onqueryTextChange(String newText) {                    Toast.makeText(ContactListActivity.this, newText, Toast.LENGTH_SHORT).show();                    return false;                }            }    );    SearchManager searchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE);    Componentname componentname = new Componentname(getApplicationContext(), TorrentListActivity.class);    searchVIEw.setSearchableInfo(searchManager.getSearchableInfo(componentname));    return true;}

Searchable.xml

<?xml version="1.0" enCoding="utf-8"?><searchable    androID:label="@string/app_name"    xmlns:androID="http://schemas.androID.com/apk/res/androID"    androID:hint="Search"    androID:voiceSearchMode="showVoiceSearchbutton|launchRecognizer"/>

List_menu.xml

<?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"    xmlns:tools="http://schemas.androID.com/tools"    tools:context="be.vanlooverenkoen.torrentsearch.TorrentListActivity">    <item        androID:ID="@+ID/action_search"        androID:title="Search"        androID:icon="@drawable/ic_action_search"        app:showAsAction="ifRoom|collapseActionVIEw"        androID:actionVIEwClass="androID.support.v7.Widget.SearchVIEw"/>    <item        androID:ID="@+ID/action_settings"        androID:orderIncategory="100"        androID:title="@string/menu_settings"        app:showAsAction="never" /></menu>

编辑1

我不是关于1活动的建议,而是关于我需要过滤列表视图列表的另一个活动

**编辑2 **

import androID.content.Context;import androID.util.Log;import androID.vIEw.LayoutInflater;import androID.vIEw.VIEw;import androID.vIEw.VIEwGroup;import androID.Widget.BaseAdapter;import androID.Widget.ImageVIEw;import androID.Widget.TextVIEw;import java.util.linkedList;import be.vanlooverenkoen.torrentsearch.CommonUtilitIEs.CommonUtilitIEs;import be.vanlooverenkoen.torrentsearch.model.Torrent;/** * Created by Koen on 19/03/2016. */public class Torrentlistadapter extends BaseAdapter {    private linkedList<Torrent> torrents;    private LayoutInflater layoutInflater;    public Torrentlistadapter(Context context, linkedList<Torrent> torrents) {        this.torrents = torrents;        layoutInflater = LayoutInflater.from(context);    }    @OverrIDe    public int getCount() {        return torrents.size();    }    @OverrIDe    public Object getItem(int position) {        return torrents.get(position);    }    @OverrIDe    public long getItemID(int position) {        return position;    }    @OverrIDe    public VIEw getVIEw(int position, VIEw convertVIEw, VIEwGroup parent) {        VIEwHolder holder;        if (convertVIEw == null) {            convertVIEw = layoutInflater.inflate(R.layout.List_row_layout, null);            holder = new VIEwHolder();            holder.TitleVIEw = (TextVIEw) convertVIEw.findVIEwByID(R.ID.txt_Title);            holder.seedVIEw = (TextVIEw) convertVIEw.findVIEwByID(R.ID.txt_seedsValue);            holder.peerVIEw = (TextVIEw) convertVIEw.findVIEwByID(R.ID.txt_peersValue);            holder.sizeVIEw = (TextVIEw) convertVIEw.findVIEwByID(R.ID.txt_sizeValue);            holder.dateVIEw = (TextVIEw) convertVIEw.findVIEwByID(R.ID.txt_datevalue);            holder.torrentTypeTitleVIEw = (TextVIEw) convertVIEw.findVIEwByID(R.ID.torrenttypeTitle);            holder.torrentTypeVIEw = (TextVIEw) convertVIEw.findVIEwByID(R.ID.torrentTypeVIEw);            holder.verifIEdimg = (ImageVIEw) convertVIEw.findVIEwByID(R.ID.verifIEd);            convertVIEw.setTag(holder);        } else {            holder = (VIEwHolder) convertVIEw.getTag();        }        Torrent torrent = torrents.get(position);        holder.TitleVIEw.setText(torrent.getTitle());        Log.d("Seeds", String.valueOf(holder.TitleVIEw.getText()));        holder.seedVIEw.setText(String.valueOf(torrent.getSeeds()));        holder.peerVIEw.setText(String.valueOf(torrent.getPeers()));        holder.sizeVIEw.setText(torrent.getSize());        holder.dateVIEw.setText(torrent.getDateOfRelease());        if(CommonUtilitIEs.checkForShowTorrentType(layoutInflater.getContext())){            holder.torrentTypeVIEw.setText(torrent.getTorrentType());            holder.torrentTypeTitleVIEw.setText("Torrent Type:");        }else{            holder.torrentTypeVIEw.setText("");            holder.torrentTypeTitleVIEw.setText("");        }        if (torrent.isLegitUploader()) {            holder.verifIEdimg.setimageResource(R.drawable.verifIEd);        }else{            holder.verifIEdimg.setimageDrawable(null);        }        return convertVIEw;    }    static class VIEwHolder {        TextVIEw TitleVIEw;        TextVIEw seedVIEw;        TextVIEw peerVIEw;        TextVIEw sizeVIEw;        TextVIEw dateVIEw;        TextVIEw torrentTypeTitleVIEw;        TextVIEw torrentTypeVIEw;        ImageVIEw verifIEdimg;    }}

编辑3

FATAL EXCEPTION: main                                                                                  Process: be.vanlooverenkoen.torrentsearch, PID: 10509                                                                                  java.lang.NullPointerException: Attempt to invoke virtual method 'voID androID.support.v7.Widget.SearchVIEw.setonqueryTextListener(androID.support.v7.Widget.SearchVIEw$OnqueryTextListener)' on a null object reference                                                                                      at be.vanlooverenkoen.torrentsearch.TorrentListActivity.onCreateOptionsMenu(TorrentListActivity.java:105)                                                                                      at androID.app.Activity.onCreatePanelMenu(Activity.java:2852)                                                                                      at androID.support.v4.app.FragmentActivity.onCreatePanelMenu(FragmentActivity.java:298)                                                                                      at androID.support.v7.vIEw.WindowCallbackWrapper.onCreatePanelMenu(WindowCallbackWrapper.java:85)                                                                                      at androID.support.v7.app.AppCompatDelegateImplBase$AppCompatwindowCallbackBase.onCreatePanelMenu(AppCompatDelegateImplBase.java:241)                                                                                      at androID.support.v7.app.AppCompatDelegateImplV7.preparePanel(AppCompatDelegateImplV7.java:1273)                                                                                      at androID.support.v7.app.AppCompatDelegateImplV7.doInvalIDatePanelMenu(AppCompatDelegateImplV7.java:1553)                                                                                      at androID.support.v7.app.AppCompatDelegateImplV7.access0(AppCompatDelegateImplV7.java:89)                                                                                      at androID.support.v7.app.AppCompatDelegateImplV7.run(AppCompatDelegateImplV7.java:129)                                                                                      at androID.os.Handler.handleCallback(Handler.java:739)                                                                                      at androID.os.Handler.dispatchMessage(Handler.java:95)                                                                                      at androID.os.Looper.loop(Looper.java:148)                                                                                      at androID.app.ActivityThread.main(ActivityThread.java:5422)                                                                                      at java.lang.reflect.Method.invoke(Native Method)                                                                                      at com.androID.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)                                                                                      at com.androID.internal.os.ZygoteInit.main(ZygoteInit.java:616)

解

我的天啊
机器人：actionVIEwClass = “androID.support.v7.Widget.SearchVIEw”
一定是
应用程式：actionVIEwClass = “androID.support.v7.Widget.SearchVIEw”

然后噗它工作

解决方法:

在List_menu.xml中,

androID:actionVIEwClass="androID.support.v7.Widget.SearchVIEw"

应改为：

app:actionVIEwClass="androID.support.v7.Widget.SearchVIEw"

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