在android中使用viewpager的带有多个片段的SearchView [英] SearchView with multiple fragments using viewpager in android

问题描述

我想用 viewPager 中的多个片段来实现 SearchView.所有片段都包含列表，我想过滤这些列表并创建一个新的 ListView，它根据它所属的片段对结果进行分类.

但我的 searchView 无法处理一个片段.

这是我的主要活动:

包com.codeon.directory；导入android.app.SearchManager；导入android.content.Context；导入android.os.Bundle；导入 android.support.design.widget.TabLayout；导入android.support.v4.app.Fragment；导入 android.support.v4.app.FragmentManager；导入 android.support.v4.app.FragmentPagerAdapter；导入 android.support.v4.view.ViewPager；导入android.support.v7.app.AppCompatActivity；导入 android.support.v7.widget.SearchView；导入android.support.v7.widget.Toolbar；导入 android.view.Menu；导入 android.view.MenuInflater；导入android.view.View；导入 com.codeon.directory.fragments.FiveFragment；导入 com.codeon.directory.fragments.FourFragment；导入 com.codeon.directory.fragments.OneFragment；导入 com.codeon.directory.fragments.SixFragment；导入 com.codeon.directory.fragments.ThreeFragment；导入 com.codeon.directory.fragments.TwoFragment；导入 java.util.ArrayList；导入 java.util.List；/*** 由 Nikhil Jain 于 2015 年 9 月 21 日创建.*/公共类 TabEffect 扩展 AppCompatActivity {私有 TabLayout tabLayout;私人 ViewPager viewPager;公共字符串 pic[] = {"1","2","3","1","2","3","1","2","3","1","2","3","1","2","3"};公共字符串状态[] = {"A","B","C"};公共字符串城市[] = {"P","Q","R"};@覆盖protected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.tablayout);工具栏工具栏 = (Toolbar) findViewById(R.id.toolbar);setSupportActionBar(工具栏);getSupportActionBar().setDisplayHomeAsUpEnabled(true);getSupportActionBar().setDisplayShowHomeEnabled(true);getSupportActionBar().setHomeButtonEnabled(true);toolbar.setNavigationOnClickListener(new View.OnClickListener() {@覆盖公共无效 onClick(查看 v){onBackPressed();}});viewPager = (ViewPager) findViewById(R.id.viewpager);setupViewPager(viewPager);tabLayout = (TabLayout) findViewById(R.id.tabs);tabLayout.setupWithViewPager(viewPager);}@覆盖公共布尔 onCreateOptionsMenu(菜单菜单){MenuInflater inflater = getMenuInflater();inflater.inflate(R.menu.tab，菜单)；//将可搜索配置与 SearchView 关联搜索管理器搜索管理器 =(SearchManager) getSystemService(Context.SEARCH_SERVICE);搜索视图搜索视图 =(SearchView) menu.findItem(R.id.action_search).getActionView();searchView.setSearchableInfo(searchManager.getSearchableInfo(getComponentName()));返回真；}私人无效 setupViewPager(ViewPager viewPager) {ViewPagerAdapter 适配器 = new ViewPagerAdapter(getSupportFragmentManager());捆绑捆绑 = 新捆绑()；bundle.putStringArray("pic", pic);bundle.putStringArray("区", 城市);bundle.putStringArray("state", state);adapter.addFragment(new OneFragment(), "ONE FRAGMENT", bundle);adapter.addFragment(new TwoFragment(), "TWO FRAGMENT", bundle);adapter.addFragment(new ThreeFragment(), "三个片段", bundle);adapter.addFragment(new FourFragment(), "FOUR FRAGMENT", bundle);adapter.addFragment(new FiveFragment(), "FIVE FRAGMENT", bundle);adapter.addFragment(new SixFragment(), "SIX FRAGMENT", bundle);viewPager.setAdapter(适配器)；}类 ViewPagerAdapter 扩展 FragmentPagerAdapter {私有最终列表<片段>mFragmentList = new ArrayList<>();私有最终列表<字符串>mFragmentTitleList = new ArrayList<>();公共 ViewPagerAdapter(FragmentManager 管理器) {超级(经理)；}@覆盖公共片段getItem(int位置){返回 mFragmentList.get(位置);}@覆盖公共 int getCount() {返回 mFragmentList.size();}公共无效addFragment(片段片段，字符串标题，捆绑参数){mFragmentList.add(片段);mFragmentTitleList.add(title);片段.setArguments(args);}@覆盖公共 CharSequence getPageTitle(int position) {返回 mFragmentTitleList.get(位置);}}}

这是我的第一个片段:

包com.codeon.directory.fragments；导入android.os.Bundle；导入android.support.v4.app.Fragment；导入 android.support.v7.widget.LinearLayoutManager；导入 android.support.v7.widget.RecyclerView；导入android.util.Log；导入 android.view.LayoutInflater；导入android.view.View；导入android.view.ViewGroup；导入 android.widget.ArrayAdapter；导入 android.widget.ListView；导入 com.codeon.directory.R；导入 com.codeon.directory.RecyclerAdapter；导入 com.codeon.directory.customadapters.Listitems_new；导入 java.util.ArrayList；/*** 由 Nikhil Jain 于 2015 年 9 月 21 日创建.*/公共类 OneFragment 扩展片段 {ListView 列表；私有 ArrayAdapter<String>列表适配器；公共 OneFragment() {//必需的空公共构造函数}@覆盖公共无效 onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);}@覆盖public View onCreateView(LayoutInflater inflater, ViewGroup 容器,捆绑保存的InstanceState){RecyclerView rootView = (RecyclerView) inflater.inflate(R.layout.fragment_one, container, false);//膨胀这个片段的布局捆绑附加服务 = getArguments();String pic[] = extras.getStringArray("pic");字符串状态[] = extras.getStringArray("state");Log.e("值",pic[0]+pic[1]+pic[2]);rootView.setLayoutManager(new LinearLayoutManager(rootView.getContext()));//listAdapter = new ArrayAdapter<>(getActivity(), android.R.layout.simple_list_item_1, android.R.id.text1, pic);rootView.setAdapter(new RecyclerAdapter(pic));返回根视图；}}

我的搜索活动:

包com.codeon.directory；导入android.app.Activity；导入android.app.SearchManager；导入android.content.Intent；导入android.os.Bundle；导入android.util.Log；导入 android.widget.Toast；/*** 由 Nikhil Jain 于 2015 年 9 月 21 日创建.*/公共类 SearchActivity 扩展 Activity {@覆盖protected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);设置内容视图(R.layout.search)；//获取意图，验证操作并获取查询意图意图 = getIntent();if (Intent.ACTION_SEARCH.equals(intent.getAction())) {字符串查询 = intent.getStringExtra(SearchManager.QUERY);doMySearch(查询);Log.e("QUERY", 查询);}}私人无效doMySearch(字符串查询){}}

这是我的 AndroidManifest.xml:

解决方案
@Chintan 是对的.我们需要使用 ViewModel.关注这个.
创建 SearchViewModel:
'''
private MutableLiveData查询=新的 MutableLiveData<String>();公共无效 setQuery(字符串查询数据){query.setValue(queryData);}公共 LiveData<String>获取查询(){返回查询；}
'''
搜索父片段
'''
public void onCreateOptionsMenu(@NonNull Menu menu, @NonNull MenuInflater inflater) {inflater.inflate(R.menu.search_menu, menu);super.onCreateOptionsMenu(menu, inflater);final MenuItem myMenuItem = menu.findItem(R.id.search_icon);searchViewModel = new ViewModelProvider(requireActivity()).get(SearchViewModel.class);searchView = (SearchView) myMenuItem.getActionView();searchView.setQueryHint(搜索");searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {@覆盖公共布尔 onQueryTextSubmit(字符串查询){返回假；}@覆盖公共布尔 onQueryTextChange(String newText) {searchViewModel.setQuery(newText);返回假；}});}
'''
对于每个子片段(标签)
'''
public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {super.onViewCreated(view, savedInstanceState);searchViewModel = new ViewModelProvider(requireActivity()).get(SearchViewModel.class);searchViewModel.getQuery().observe(getViewLifecycleOwner(), new Observer<String>() {@覆盖公共无效 onChanged(String s) {如果 (s!=null){adapter.getFilter().filter(s);}});}
'''
单个查询将适用于所有选项卡.)我研究了很长时间，但是这个解决方案对我有用.
I want to implement SearchView with multiple fragments present in a viewPager. All fragemnts contains lists and I want to filter those lists and create a new ListView which has categorization of results based upon which fragment it belongs to.

But my searchView is not working with one fragment.

Here is my main activity:
package com.codeon.directory;

import android.app.SearchManager;
import android.content.Context;
import android.os.Bundle;
import android.support.design.widget.TabLayout;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.SearchView;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.View;
import com.codeon.directory.fragments.FiveFragment;
import com.codeon.directory.fragments.FourFragment;
import com.codeon.directory.fragments.OneFragment;
import com.codeon.directory.fragments.SixFragment;
import com.codeon.directory.fragments.ThreeFragment;
import com.codeon.directory.fragments.TwoFragment;
import java.util.ArrayList;
import java.util.List;

/**
 * Created by Nikhil Jain on 21-Sep-15.
 */
public class TabEffect extends AppCompatActivity {

    private TabLayout tabLayout;
    private ViewPager viewPager;
    public String pic[] = {"1","2","3","1","2","3","1","2","3","1","2","3","1","2","3"};
    public String state[] = {"A","B","C"};
    public String city[] = {"P","Q","R"};

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.tablayout);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
        getSupportActionBar().setDisplayShowHomeEnabled(true);
        getSupportActionBar().setHomeButtonEnabled(true);
        toolbar.setNavigationOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                onBackPressed();
            }
        });

        viewPager = (ViewPager) findViewById(R.id.viewpager);
        setupViewPager(viewPager);

        tabLayout = (TabLayout) findViewById(R.id.tabs);
        tabLayout.setupWithViewPager(viewPager);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.tab, 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;
    }

    private void setupViewPager(ViewPager viewPager) {
        ViewPagerAdapter adapter = new ViewPagerAdapter(getSupportFragmentManager());
        Bundle bundle = new Bundle();
        bundle.putStringArray("pic", pic);
        bundle.putStringArray("district", city);
        bundle.putStringArray("state", state);
        adapter.addFragment(new OneFragment(), "ONE FRAGMENT", bundle);
        adapter.addFragment(new TwoFragment(), "TWO FRAGMENT", bundle);
        adapter.addFragment(new ThreeFragment(), "THREE FRAGMENT", bundle);
        adapter.addFragment(new FourFragment(), "FOUR FRAGMENT", bundle);
        adapter.addFragment(new FiveFragment(), "FIVE FRAGMENT", bundle);
        adapter.addFragment(new SixFragment(), "SIX FRAGMENT", bundle);
        viewPager.setAdapter(adapter);
    }

    class ViewPagerAdapter extends FragmentPagerAdapter {
        private final List<Fragment> mFragmentList = new ArrayList<>();
        private final List<String> mFragmentTitleList = new ArrayList<>();

        public ViewPagerAdapter(FragmentManager manager) {
            super(manager);
        }

        @Override
        public Fragment getItem(int position) {
            return mFragmentList.get(position);
        }

        @Override
        public int getCount() {
            return mFragmentList.size();
        }

        public void addFragment(Fragment fragment, String title, Bundle args) {
            mFragmentList.add(fragment);
            mFragmentTitleList.add(title);
            fragment.setArguments(args);
        }

        @Override
        public CharSequence getPageTitle(int position) {
            return mFragmentTitleList.get(position);
        }
    }
}
This is my first fragment :
package com.codeon.directory.fragments;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ListView;

import com.codeon.directory.R;
import com.codeon.directory.RecyclerAdapter;
import com.codeon.directory.customadapters.Listitems_new;

import java.util.ArrayList;

/**
 * Created by Nikhil Jain on 21-Sep-15.
 */
public class OneFragment extends Fragment {

    ListView list;
    private ArrayAdapter<String> listAdapter ;

    public OneFragment() {
        // Required empty public constructor
    }

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

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        RecyclerView rootView = (RecyclerView) inflater.inflate(R.layout.fragment_one, container, false);
        // Inflate the layout for this fragment
        Bundle extras = getArguments();
        String pic[] = extras.getStringArray("pic");
        String state[] = extras.getStringArray("state");
        Log.e("VALUE",pic[0]+pic[1]+pic[2]);

        rootView.setLayoutManager(new LinearLayoutManager(rootView.getContext()));
        //listAdapter = new ArrayAdapter<>(getActivity(), android.R.layout.simple_list_item_1, android.R.id.text1, pic);
        rootView.setAdapter(new RecyclerAdapter(pic));
        return rootView;
    }
}
My SearchActivity:
package com.codeon.directory;

import android.app.Activity;
import android.app.SearchManager;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.widget.Toast;

/**
  * Created by Nikhil Jain on 21-Sep-15.
*/
public class SearchActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.search);

    // Get the intent, verify the action and get the query
    Intent intent = getIntent();
    if (Intent.ACTION_SEARCH.equals(intent.getAction())) {
        String query = intent.getStringExtra(SearchManager.QUERY);
        doMySearch(query);
        Log.e("QUERY", query);
    }
}

private void doMySearch(String query) {

}
}
This is my AndroidManifest.xml:
<activity
        android:name=".TabEffect"
        android:label="@string/tablayout"
        android:theme="@style/AppTheme" >
    </activity>
    <activity android:name=".SearchActivity" >
        <intent-filter>
            <action android:name="android.intent.action.SEARCH" />
        </intent-filter>
        <meta-data android:name="android.app.searchable"
            android:resource="@layout/searchable"/>
    </activity>
This is my Searchable layout:
<?xml version="1.0" encoding="utf-8"?>
<searchable
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:label="@string/app_name"
    android:hint="@string/search_hint"
    android:layout_height="wrap_content"
    android:layout_width="match_parent"/>
For simple, I want to implement searchView like in Whatsapp.

解决方案
@Chintan is right. We need to use ViewModel.
Follow this.

Create SearchViewModel:
'''
private MutableLiveData<String> query= new MutableLiveData<String>();

public void setQuery(String queryData)
{
    query.setValue(queryData);
}

public LiveData<String> getQuery() {
    return query;
}
'''

SearchParentFragment
'''
public void onCreateOptionsMenu(@NonNull Menu menu, @NonNull MenuInflater inflater) {
    inflater.inflate(R.menu.search_menu, menu);
    super.onCreateOptionsMenu(menu, inflater);

    final MenuItem myMenuItem = menu.findItem(R.id.search_icon);

    searchViewModel = new ViewModelProvider(requireActivity()).get(SearchViewModel.class);

    searchView = (SearchView) myMenuItem.getActionView();
    searchView.setQueryHint("Search");
    searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
        @Override
        public boolean onQueryTextSubmit(String query) {
            return false;
        }

        @Override
        public boolean onQueryTextChange(String newText) {
            searchViewModel.setQuery(newText);
            return false;
        }
    });
}
'''

For each Child Fragment (tabs)
'''
public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
    super.onViewCreated(view, savedInstanceState);
    searchViewModel = new ViewModelProvider(requireActivity()).get(SearchViewModel.class);
    searchViewModel.getQuery().observe(getViewLifecycleOwner(), new Observer<String>() {
        @Override
        public void onChanged(String s) {
            if (s!=null)
            {adapter.getFilter().filter(s);
        }
    });
}
'''
A single query will work for all tabs.)
I studied it for a long time, but this solution works for me.

                        
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