使用 SearchView 在 Recyclerview 过滤后获得错误的位置

Question

我尝试使用网站将 SearchView 添加到我的应用程序：

http://www.tutorialsbuzz.com/2015/11/Android-Filter-RecyclerView-Using-SearchView-In-ToolBar.html

但是，单击过滤后的结果后，我无法将用户发送到正确的 Recyclerview 位置：

例如：如果用户搜索第二个结果并单击它，应用程序将使用第一个结果而不是第二个结果向他发送下一个活动（详细信息活动）。

这是我的应用程序代码（ ListAdapter.java ）：

public class ListAdapter extends RecyclerView.Adapter<ListAdapter.GmailVH> {

    ArrayList< Information > dataList;
    String letter;
    Context context;

    public ListAdapter(Context context, ArrayList< Information > dataList) {
        this.context = context;
        this.dataList = dataList;    
    }

    @Override
    public GmailVH onCreateViewHolder(ViewGroup viewGroup, int i) {
        View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.list_item, viewGroup, false);
        return new GmailVH(view);
    }

    @Override
    public void onBindViewHolder(GmailVH gmailVH, int i) {

        Information current= dataList.get(i);

        gmailVH.title.setText(current.title);

        letter = String.valueOf(current.title2);

        TextDrawable drawable = TextDrawable.builder()
                .buildRound(letter, generator.getRandomColor());

        gmailVH.letter.setImageDrawable(drawable);
  }

    @Override
    public int getItemCount() {
        return dataList == null ? 0 : dataList.size();
    }

    public Object getItem(int location) {
        return dataList.get(location);
    }

    class GmailVH extends RecyclerView.ViewHolder {
        TextView title;
        ImageView letter;

        public GmailVH(View itemView) {
            super(itemView);
            letter = (ImageView) itemView.findViewById(R.id.gmailitem_letter);
            title = (TextView) itemView.findViewById(R.id.gmailitem_title);
        }
    }

    public void setFilter(List<Information> informations) {
        dataList = new ArrayList<>();
        dataList.addAll(informations);
        notifyDataSetChanged();
    }
}

主活动.java :

public class MainActivity extends AppCompatActivity
        implements NavigationView.OnNavigationItemSelectedListener {

    RecyclerView recyclerView;
    ListAdapter adapter;
    private DrawerLayout mDrawerLayout;
    private ActionBarDrawerToggle mDrawerToggle;

    final ArrayList< Information > listData = new ArrayList<>();

    @Override
    protected void onCreate ( Bundle savedInstanceState ) {

        super.onCreate( savedInstanceState );

        setContentView( R.layout.activity_main );


        Toolbar toolbar = ( Toolbar ) findViewById( R.id.toolbar );
        setSupportActionBar( toolbar );

        mNavigationView = ( NavigationView ) findViewById( R.id.nav_view );
        mNavigationView.setNavigationItemSelectedListener( this );

        mDrawerLayout = ( DrawerLayout ) findViewById( R.id.drawer_layout );
        mDrawerToggle = new ActionBarDrawerToggle( this, mDrawerLayout, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close );
        mDrawerLayout.addDrawerListener( mDrawerToggle );
        mDrawerToggle.syncState();

        recyclerView = ( RecyclerView ) findViewById( R.id.gmail_list );

        recyclerView.setLayoutManager( new LinearLayoutManager( this ) );
        recyclerView.setItemAnimator( new DefaultItemAnimator() );


        String[] title_array = getResources().getStringArray( R.array.title_array );
        String[] letters_array = getResources().getStringArray( R.array.letters_array );


        for ( int i = 0; i < title_array.length && i < letters_array.length; i++ ) {

            Information feed = new Information();

            feed.title = title_array[ i ];
            feed.title2 = letters_array[ i ];

            listData.add( feed );

        }


        if ( adapter == null ) {
            adapter = new ListAdapter( this, listData );
            recyclerView.setAdapter( adapter );
        }

        recyclerView.addOnItemTouchListener( new RecyclerTouchListener( this, recyclerView, new ClickListener() {

            @Override
            public void onClick ( View view, int position ) {

                Intent intent = new Intent( MainActivity.this, Name_info.class );

                Bundle extras = new Bundle();

                String[] title_array = getResources().getStringArray( R.array.title_array );
                final String title_clicked = title_array[ position ];

                String[] letters_array = getResources().getStringArray( R.array.letters_array );
                final String letters_clicked = letters_array[ position ];

                String[] letters_title_array = getResources().getStringArray( R.array.letters_title_array );
                final String letters_title_clicked = letters_title_array [ position ];

                intent.putExtras( extras );
                intent.putExtra( "title_array", title_clicked );
                intent.putExtra( "letters_array", letters_clicked );
                intent.putExtra( "letters_title_array", letters_title_clicked );

                ActivityCompat.startActivity( MainActivity.this, intent, extras );

            }

        }
        ) );


        if ( !didUserSeeDrawer() ) {
            showDrawer();
            markDrawerSeen();
        } else {
            hideDrawer();
        }

    }


    @Override
    public boolean onCreateOptionsMenu ( Menu menu ) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate( R.menu.main, menu );

          final SearchView searchView = ( SearchView ) MenuItemCompat.getActionView( item );

        searchView.setOnQueryTextListener(
                new SearchView.OnQueryTextListener(){

                    @Override
                    public boolean onQueryTextSubmit(String query) {
                        return false;
                    }

                    @Override
                    public boolean onQueryTextChange(String newText) {

                        final ArrayList<Information> filteredModelList = filter(listData , newText);
                        adapter.setFilter(filteredModelList);

                        return true;
                    }
                });

        MenuItemCompat.setOnActionExpandListener( item,
                                                  new MenuItemCompat.OnActionExpandListener() {
                                                      @Override
                                                      public boolean onMenuItemActionCollapse ( MenuItem item ) {
// Do something when collapsed
                                                          adapter.setFilter( listData );
                                                          return true; // Return true to collapse action view
                                                      }

                                                      @Override
                                                      public boolean onMenuItemActionExpand ( MenuItem item ) {
// Do something when expanded
                                                          return true; // Return true to expand action view
                                                      }
                                                  } );
        return true;
    }

    @Override
    public boolean onOptionsItemSelected ( MenuItem item ) {
        switch ( item.getItemId() ) {

            case android.R.id.home:

                mDrawerLayout.openDrawer( GravityCompat.START );
                return true;



        }

        return super.onOptionsItemSelected( item );
    }


//...

            class RecyclerTouchListener implements RecyclerView.OnItemTouchListener {


                private GestureDetector gestureDetector;
                private ClickListener clickListener;

                public RecyclerTouchListener ( Context context, final RecyclerView recyclerView, final ClickListener
                        clickListener ) {

                    this.clickListener = clickListener;


                    gestureDetector = new GestureDetector( context, new GestureDetector
                            .SimpleOnGestureListener() {

                        @Override
                        public boolean onSingleTapUp ( MotionEvent e ) {
                            return true;
                        }

                    } );

                }

                @Override
                public boolean onInterceptTouchEvent ( RecyclerView rv, MotionEvent e ) {

                    View child = rv.findChildViewUnder( e.getX(), e.getY() );

                    if ( child != null && clickListener != null && gestureDetector.onTouchEvent( e ) )

                    {

                        clickListener.onClick( child, rv.getChildAdapterPosition( child ) );

                    }

                    return false;
                }

                @Override
                public void onTouchEvent ( RecyclerView rv, MotionEvent e ) {

                }

                @Override
                public void onRequestDisallowInterceptTouchEvent ( boolean disallowIntercept ) {

                }
            }

            public interface ClickListener {

                void onClick ( View view, int position );

            }



    private ArrayList<Information> filter(ArrayList<Information> models, String query) {
        query = query.toLowerCase();

        final ArrayList<Information> filteredModelList = new ArrayList<>();
        for (Information model : models) {
            final String text = model.getName().toLowerCase();
            if (text.contains(query)) {
                filteredModelList.add(model);
            }
       }
        return filteredModelList;
    }
}

信息.java

public class Information {

    String title;
    String title2;

    public String getName() {
        return title;
    }

}

提前致谢。

---

更新解决方案：

通过将以下代码添加到Information.java ：

public class Information {

    String title;
    String title2;
    String title3;

    public String getName() {
        return title;
    }

    public String getLetter() {
        return title2;
    }

    public String getLetter_title() {
        return title3;
    }
}

并将MainActivity.java 中的String[] 数组和 putExtra 替换为：

        Information information = (Information )adapter.getItem(position);


       intent.putExtra( "title_array", information.getName() );
       intent.putExtra( "letters_array", information.getLetter() );
       intent.putExtra( "letters_title_array", information.getLetter_title() );

Answer 1

在您的 onclick 方法中，您总是从相同的数组中获取每个项目。 因此，即使您过滤数据，您也会选择要发送的错误项目。