我在一个活动(主页.java(中制作了不同的片段,工具栏和导航抽屉位于其中。
现在我想把搜索视图放在片段中。我们通常在oncreateoption菜单中编写与searchview相关的所有代码。我做了同样的事情,但是在片段内制作了oncreate选项。
我没有收到任何错误,但搜索栏没有显示在工具栏上。
package com.example.foody;
import android.database.Cursor;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.SearchView;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import java.util.ArrayList;
public class fitem extends Fragment implements SearchView.OnQueryTextListener
{
RecyclerView rv1;
fitemAdapter adapter;
ArrayList<All_Data> item;
Cursor cr;
Storage sob;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
View v=inflater.inflate(R.layout.fragment_fitem, container, false);
sob=new Storage(getContext());
Bundle bundle = this.getArguments();
if (bundle == null)
cr=sob.allData(); //if called from home page
else
cr=sob.categorisedData(bundle.getString("category")); // if called from category page
inData();
rv1=v.findViewById(R.id.rv1);
rv1.setHasFixedSize(true);
rv1.setLayoutManager(new LinearLayoutManager(getContext()));
adapter=new fitemAdapter(getContext(),item);
rv1.setAdapter(adapter);
return v;
}
void inData()
{
item=new ArrayList<>();
while(cr.moveToNext())
{
item.add(new All_Data(cr.getString(0),cr.getString(2),cr.getString(3)));
}
}
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater)
{
super.onCreateOptionsMenu(menu, inflater);
inflater.inflate(R.menu.tool_menu, menu);
MenuItem searchItem = menu.findItem(R.id.search1);
SearchView searchView = (SearchView) searchItem.getActionView();
searchView.setOnQueryTextListener(fitem.this);
searchView.setQueryHint("Search");
}
@Override
public boolean onQueryTextChange(String s)
{
String userInput=s.toLowerCase();
ArrayList<All_Data> filterlist=new ArrayList<>();
for(int i=0;i<item.size();i++)
{
String st=item.get(i).getName().toLowerCase();
if(st.contains(userInput))
filterlist.add(item.get(i));
}
adapter=new fitemAdapter(getContext(),filterlist);
rv1.setAdapter(adapter);
return true;
}
@Override
public boolean onQueryTextSubmit(String s) {
return false;
}
}
在片段的onCreate()/onCreateView()
内调用setHasOptionsMenu(true);
这将允许你的片段显示你在片段的onCreateOptionsMenu()
内膨胀的菜单项;否则它使用主机活动的菜单。