Ich beantrageAndroid und ich benutze CursorTreeAdapter als ExpandableListView. Jetzt möchte ich das Suchfeld zum Anzeigen der gefilterten ExpandableListView-Elemente verwenden. So was:

Hier ist der Code, den ich bisher habe:

MainActivity.java:

package com.example.cursortreeadaptersearch;

import java.util.HashMap;

import android.app.SearchManager;
import android.content.Context;
import android.database.ContentObserver;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.provider.ContactsContract;
import android.support.v4.app.LoaderManager;
import android.support.v4.app.LoaderManager.LoaderCallbacks;
import android.support.v4.content.CursorLoader;
import android.support.v4.content.Loader;
import android.util.Log;
import android.widget.ExpandableListView;
import android.widget.SearchView;
import android.widget.SearchView.OnCloseListener;
import android.widget.SearchView.OnQueryTextListener;

import com.actionbarsherlock.app.SherlockFragmentActivity;

public class MainActivity extends SherlockFragmentActivity {

    private SearchView search;
    private MyListAdapter listAdapter;
    private ExpandableListView myList;

    private final String DEBUG_TAG = getClass().getSimpleName().toString();

    /**
     * The columns we are interested in from the database
     */
    static final String[] CONTACTS_PROJECTION = new String[] {
            ContactsContract.Contacts._ID,
            ContactsContract.Contacts.DISPLAY_NAME,
            ContactsContract.Contacts.PHOTO_ID,
            ContactsContract.CommonDataKinds.Email.DATA,
            ContactsContract.CommonDataKinds.Photo.CONTACT_ID };

    static final String[] GROUPS_SUMMARY_PROJECTION = new String[] {
            ContactsContract.Groups.TITLE, ContactsContract.Groups._ID,
            ContactsContract.Groups.SUMMARY_COUNT,
            ContactsContract.Groups.ACCOUNT_NAME,
            ContactsContract.Groups.ACCOUNT_TYPE,
            ContactsContract.Groups.DATA_SET };

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        SearchManager searchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE);
        search = (SearchView) findViewById(R.id.search);
        search.setSearchableInfo(searchManager
                .getSearchableInfo(getComponentName()));
        search.setIconifiedByDefault(false);
        search.setOnQueryTextListener(new OnQueryTextListener() {

            @Override
            public boolean onQueryTextSubmit(String query) {
                listAdapter.filterList(query);
                expandAll();
                return false;
            }

            @Override
            public boolean onQueryTextChange(String query) {
                listAdapter.filterList(query);
                expandAll();
                return false;
            }
        });

        search.setOnCloseListener(new OnCloseListener() {

            @Override
            public boolean onClose() {
                listAdapter.filterList("");
                expandAll();
                return false;
            }
        });

        // get reference to the ExpandableListView
        myList = (ExpandableListView) findViewById(R.id.expandableList);
        // create the adapter
        listAdapter = new MyListAdapter(null, MainActivity.this);
        // attach the adapter to the list
        myList.setAdapter(listAdapter);

        Loader<Cursor> loader = getSupportLoaderManager().getLoader(-1);
        if (loader != null && !loader.isReset()) {
            runOnUiThread(new Runnable() {
                public void run() {
                    getSupportLoaderManager().restartLoader(-1, null,
                            mSpeakersLoaderCallback);
                }
            });
        } else {
            runOnUiThread(new Runnable() {
                public void run() {
                    getSupportLoaderManager().initLoader(-1, null,
                            mSpeakersLoaderCallback).forceLoad();
                    ;
                }
            });
        }

    }

    @Override
    public void onResume() {
        super.onResume();

        getApplicationContext().getContentResolver().registerContentObserver(
                ContactsContract.Data.CONTENT_URI, true,
                mSpeakerChangesObserver);
    }

    @Override
    public void onPause() {
        super.onPause();

        getApplicationContext().getContentResolver().unregisterContentObserver(
                mSpeakerChangesObserver);
    }

    // method to expand all groups
    private void expandAll() {
        int count = listAdapter.getGroupCount();
        for (int i = 0; i < count; i++) {
            myList.expandGroup(i);
        }
    }

    public LoaderManager.LoaderCallbacks<Cursor> mSpeakersLoaderCallback = new LoaderCallbacks<Cursor>() {

        @Override
        public Loader<Cursor> onCreateLoader(int id, Bundle args) {
            Log.d(DEBUG_TAG, "onCreateLoader for loader_id " + id);
            CursorLoader cl = null;

            HashMap<Integer, Integer> groupMap = listAdapter.getGroupMap();
            if (id != -1) {
                int groupPos = groupMap.get(id);
                if (groupPos == 0) { // E-mail group
                    String[] PROJECTION = new String[] {
                            ContactsContract.RawContacts._ID,
                            ContactsContract.CommonDataKinds.Email.DATA };
                    String sortOrder = "CASE WHEN "
                            + ContactsContract.Contacts.DISPLAY_NAME
                            + " NOT LIKE '%@%' THEN 1 ELSE 2 END, "
                            + ContactsContract.Contacts.DISPLAY_NAME + ", "
                            + ContactsContract.CommonDataKinds.Email.DATA
                            + " COLLATE NOCASE";
                    String selection = ContactsContract.CommonDataKinds.Email.DATA
                            + " NOT LIKE ''";
                    cl = new CursorLoader(getApplicationContext(),
                            ContactsContract.CommonDataKinds.Email.CONTENT_URI,
                            PROJECTION, selection, null, sortOrder);
                } else if (groupPos == 1) { // Name group
                    Uri contactsUri = ContactsContract.Data.CONTENT_URI;
                    String selection = "(("
                            + ContactsContract.CommonDataKinds.GroupMembership.DISPLAY_NAME
                            + " NOTNULL) AND ("
                            + ContactsContract.CommonDataKinds.GroupMembership.HAS_PHONE_NUMBER
                            + "=1) AND ("
                            + ContactsContract.CommonDataKinds.GroupMembership.DISPLAY_NAME
                            + " != '') AND ("
                            + ContactsContract.CommonDataKinds.GroupMembership.GROUP_ROW_ID
                            + " = '1' ))"; // Row ID 1 == All contacts
                    String sortOrder = ContactsContract.CommonDataKinds.GroupMembership.DISPLAY_NAME
                            + " COLLATE LOCALIZED ASC";

                    cl = new CursorLoader(getApplicationContext(), contactsUri,
                            CONTACTS_PROJECTION, selection, null, sortOrder);
                }
            } else {
                // group cursor
                Uri groupsUri = ContactsContract.Groups.CONTENT_SUMMARY_URI;
                String selection = "((" + ContactsContract.Groups.TITLE
                        + " NOTNULL) AND (" + ContactsContract.Groups.TITLE
                        + " == 'Coworkers' ) OR ("
                        + ContactsContract.Groups.TITLE
                        + " == 'My Contacts' ))"; // Select only Coworkers
                                                 // (E-mail only) and My
                                                // Contacts (Name only)
                String sortOrder = ContactsContract.Groups.TITLE
                        + " COLLATE LOCALIZED ASC";
                cl = new CursorLoader(getApplicationContext(), groupsUri,
                        GROUPS_SUMMARY_PROJECTION, selection, null, sortOrder);
            }

            return cl;
        }

        @Override
        public void onLoadFinished(Loader<Cursor> loader, Cursor data) {
            // Swap the new cursor in.
            int id = loader.getId();
//          Log.d("Dump Cursor MainActivity",
//                  DatabaseUtils.dumpCursorToString(data));
            Log.d(DEBUG_TAG, "onLoadFinished() for loader_id " + id);
            if (id != -1) {
                // child cursor
                if (!data.isClosed()) {
                    Log.d(DEBUG_TAG, "data.getCount() " + data.getCount());

                    HashMap<Integer, Integer> groupMap = listAdapter
                            .getGroupMap();
                    try {
                        int groupPos = groupMap.get(id);
                        Log.d(DEBUG_TAG, "onLoadFinished() for groupPos "
                                + groupPos);
                        listAdapter.setChildrenCursor(groupPos, data);
                    } catch (NullPointerException e) {
                        Log.w("DEBUG",
                                "Adapter expired, try again on the next query: "
                                        + e.getMessage());
                    }
                }
            } else {
                listAdapter.setGroupCursor(data);
            }
        }

        @Override
        public void onLoaderReset(Loader<Cursor> loader) {
            // This is called when the last Cursor provided to onLoadFinished()
            // is about to be closed.
            int id = loader.getId();
            Log.d(DEBUG_TAG, "onLoaderReset() for loader_id " + id);
            if (id != 1) {
                // child cursor
                try {
                    listAdapter.setChildrenCursor(id, null);
                } catch (NullPointerException e) {
                    Log.w(DEBUG_TAG,
                            "Adapter expired, try again on the next query: "
                                    + e.getMessage());
                }
            } else {
                listAdapter.setGroupCursor(null);
            }
        }
    };

    private ContentObserver mSpeakerChangesObserver = new ContentObserver(
            new Handler()) {

        @Override
        public void onChange(boolean selfChange) {
            if (getApplicationContext() != null) {
                runOnUiThread(new Runnable() {
                    public void run() {
                        getSupportLoaderManager().restartLoader(-1, null,
                                mSpeakersLoaderCallback);
                    }
                });
            }
        }
    };
}

MyListAdapter.java:

package com.example.cursortreeadaptersearch;

import java.util.HashMap;

import android.content.Context;
import android.database.Cursor;
import android.provider.ContactsContract;
import android.support.v4.content.Loader;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.CursorTreeAdapter;
import android.widget.TextView;

public class MyListAdapter extends CursorTreeAdapter {

    public HashMap<String, View> childView = new HashMap<String, View>();

    /**
     * The columns we are interested in from the database
     */

    private final String DEBUG_TAG = getClass().getSimpleName().toString();

    protected final HashMap<Integer, Integer> mGroupMap;

    private MainActivity mActivity;
    private LayoutInflater mInflater;

    String mConstraint;

    public MyListAdapter(Cursor cursor, Context context) {

        super(cursor, context);
        mActivity = (MainActivity) context;
        mInflater = LayoutInflater.from(context);
        mGroupMap = new HashMap<Integer, Integer>();
    }

    @Override
    public View newGroupView(Context context, Cursor cursor,
            boolean isExpanded, ViewGroup parent) {

        final View view = mInflater.inflate(R.layout.list_group, parent, false);
        return view;
    }

    @Override
    public void bindGroupView(View view, Context context, Cursor cursor,
            boolean isExpanded) {

        TextView lblListHeader = (TextView) view
                .findViewById(R.id.lblListHeader);

        if (lblListHeader != null) {
            lblListHeader.setText(cursor.getString(cursor
                    .getColumnIndex(ContactsContract.Groups.TITLE)));
        }
    }

    @Override
    public View newChildView(Context context, Cursor cursor,
            boolean isLastChild, ViewGroup parent) {

        final View view = mInflater.inflate(R.layout.list_item, parent, false);

        return view;
    }

    @Override
    public void bindChildView(View view, Context context, Cursor cursor,
            boolean isLastChild) {

        TextView txtListChild = (TextView) view.findViewById(R.id.lblListItem);

        if (txtListChild != null) {
            txtListChild.setText(cursor.getString(1)); // Selects E-mail or
                                                        // Display Name
        }

    }

    protected Cursor getChildrenCursor(Cursor groupCursor) {
        // Given the group, we return a cursor for all the children within that
        // group
        int groupPos = groupCursor.getPosition();
        int groupId = groupCursor.getInt(groupCursor
                .getColumnIndex(ContactsContract.Groups._ID));

        Log.d(DEBUG_TAG, "getChildrenCursor() for groupPos " + groupPos);
        Log.d(DEBUG_TAG, "getChildrenCursor() for groupId " + groupId);

        mGroupMap.put(groupId, groupPos);

        Loader loader = mActivity.getSupportLoaderManager().getLoader(groupId);
        if (loader != null && !loader.isReset()) {
            mActivity.getSupportLoaderManager().restartLoader(groupId, null,
                    mActivity.mSpeakersLoaderCallback);
        } else {
            mActivity.getSupportLoaderManager().initLoader(groupId, null,
                    mActivity.mSpeakersLoaderCallback);
        }

        return null;
    }

    // Access method
    public HashMap<Integer, Integer> getGroupMap() {
        return mGroupMap;
    }

    public void filterList(CharSequence constraint) {
        // TODO Filter the data here
    }
}

Ich habe den Code sehr stark vereinfacht und aufgeräumt (damit ihr das nicht machen müsst).

Wie Sie sehen, habe ich insgesamt 3 Cursor (1 für die Gruppen und 2 für die Kinder). Die Daten stammen vonKontakteVertrag (welche sind die Kontakte des Benutzers). Der Cursor von Kind 1 repräsentiert alle E-Mails aller Kontakte und der Cursor von Kind 2 repräsentiert alle Anzeigenamen der Kontakte. (Die meisten Laderfunktionen stammen vonHier).

Die einzige Sache ist jetzt, wie ich eine Suche implementiere? Sollte ich das über den Inhaltsanbieter oder eine unformatierte Abfrage in der Datenbank tun? Ich möchte, dass die Ergebnisse beider Kindertabellen angezeigt werden. Ich denke, weil es einfach ist, beim Schreiben einen Fehler zu machentokenize=porter ist eine Option in meinem Fall.

Ich hoffe, dass mich jemand in eine gute Richtung weisen kann.

Bearbeiten:

Ich habe es versuchtMyListAdapter.java (mitFilterQueryProvider wie vorgeschlagen vonKyle I.):

public void filterList(CharSequence constraint) {
    final Cursor oldCursor = getCursor();
    setFilterQueryProvider(filterQueryProvider);
    getFilter().filter(constraint, new FilterListener() {
        public void onFilterComplete(int count) {
            // assuming your activity manages the Cursor 
            // (which is a recommended way)
            notifyDataSetChanged();
//          stopManagingCursor(oldCursor);
//          final Cursor newCursor = getCursor();
//          startManagingCursor(newCursor);
//          // safely close the oldCursor
            if (oldCursor != null && !oldCursor.isClosed()) {
                oldCursor.close();
            }
        }
    });
}

private FilterQueryProvider filterQueryProvider = new FilterQueryProvider() {
    public Cursor runQuery(CharSequence constraint) {
        // assuming you have your custom DBHelper instance 
        // ready to execute the DB request
        String s = '%' + constraint.toString() + '%';
        return mActivity.getContentResolver().query(ContactsContract.Data.CONTENT_URI,
                MainActivity.CONTACTS_PROJECTION,
                ContactsContract.CommonDataKinds.GroupMembership.DISPLAY_NAME + " LIKE ?",
            new String[] { s },
            null);
    }
};

Und das inMainActivity.java:

        search.setOnQueryTextListener(new OnQueryTextListener() {

            @Override
            public boolean onQueryTextSubmit(String query) {
                listAdapter.filterList(query);
                expandAll();
                return false;
            }

            @Override
            public boolean onQueryTextChange(String query) {
                listAdapter.filterList(query);
                expandAll();
                return false;
            }
        });

        search.setOnCloseListener(new OnCloseListener() {

            @Override
            public boolean onClose() {
                listAdapter.filterList("");
                expandAll();
                return false;
            }
        });

Aber dann bekomme ich diese Fehler, wenn ich versuche zu suchen:

12-20 13:20:19.449: E/CursorWindow(28747): Failed to read row 0, column -1 from a CursorWindow which has 96 rows, 4 columns.
12-20 13:20:19.449: D/AndroidRuntime(28747): Shutting down VM
12-20 13:20:19.449: W/dalvikvm(28747): threadid=1: thread exiting with uncaught exception (group=0x415c62a0)
12-20 13:20:19.499: E/AndroidRuntime(28747): FATAL EXCEPTION: main
12-20 13:20:19.499: E/AndroidRuntime(28747): java.lang.IllegalStateException: Couldn't read row 0, col -1 from CursorWindow.  Make sure the Cursor is initialized correctly before accessing data from it.

Was mache ich falsch? Oder liegt das daran, dass ich nur 1 Abfrage (Anzeigenamen) anstelle von 2 (Anzeigenamen und E-Mails) in zurückgeberunQuery?

Bearbeiten 2:

Zunächst habe ich alle meine Datenbankimplementierungen auf geändertKontakteVertrag. Dies ist einfacher zu pflegen, so dass Sie keine eigene Datenbankimplementierung schreiben müssen.

Was ich jetzt versucht habe, ist, meine Beschränkung in zu rettenrunQuery() vonFilterQueryProviderund dann ingetChildrenCursor Führen Sie eine Abfrage für diese Einschränkung aus. (wie vorgeschlagen vonJRaymond)

private String mConstraint;
protected Cursor getChildrenCursor(Cursor groupCursor) {
    // Given the group, we return a cursor for all the children within that
    // group
    int groupPos = groupCursor.getPosition();
    int groupId = groupCursor.getInt(groupCursor
            .getColumnIndex(ContactsContract.Groups._ID));

    Log.d(DEBUG_TAG, "getChildrenCursor() for groupPos " + groupPos);
    Log.d(DEBUG_TAG, "getChildrenCursor() for groupId " + groupId);

    mGroupMap.put(groupId, groupPos);

    Bundle b = new Bundle();
    b.putString("constraint", mConstraint);

    Loader loader = mActivity.getSupportLoaderManager().getLoader(groupId);
    if (loader != null && !loader.isReset()) {
        if (mConstraint == null || mConstraint.isEmpty()) {
            // Normal query
            mActivity.getSupportLoaderManager().restartLoader(groupId,
                    null, mActivity.mSpeakersLoaderCallback);
        } else {
            // Constrained query
            mActivity.getSupportLoaderManager().restartLoader(groupId, b,
                    mActivity.mSpeakersLoaderCallback);

        }
    } else {
        if (mConstraint == null || mConstraint.isEmpty()) {
            // Normal query
            mActivity.getSupportLoaderManager().initLoader(groupId, null,
                    mActivity.mSpeakersLoaderCallback);
        } else {
            // Constrained query
            mActivity.getSupportLoaderManager().initLoader(groupId, b,
                    mActivity.mSpeakersLoaderCallback);
        }
    }

    return null;
}

Und hier ist dasFilterQueryProvider:

private FilterQueryProvider filterQueryProvider = new FilterQueryProvider() {
    public Cursor runQuery(CharSequence constraint) {
        // Load the group cursor here and assign mConstraint
        mConstraint = constraint.toString();
        Uri groupsUri = ContactsContract.Groups.CONTENT_SUMMARY_URI;
        String selection = "((" + ContactsContract.Groups.TITLE
                + " NOTNULL) AND (" + ContactsContract.Groups.TITLE
                + " == 'Coworkers' ) OR (" + ContactsContract.Groups.TITLE
                + " == 'My Contacts' ))"; // Select only Coworkers
                                            // (E-mail only) and My
                                            // Contacts (Name only)
        String sortOrder = ContactsContract.Groups.TITLE
                + " COLLATE LOCALIZED ASC";
        return mActivity.getContentResolver().query(groupsUri,
                MainActivity.GROUPS_SUMMARY_PROJECTION, selection, null,
                sortOrder);
    }
};

Wie Sie sehen, habe ich die Abfrage der Gruppen geladen, um die zu erhaltengetChildrenCursor Arbeiten. Nur was für eine Abfrage sollte ich ausführenMainActivity dass ich aus dem Bundle bekomme?

Das Projekt kann heruntergeladen werdenHier, die Sie in Eclipse importieren können.