A month ago, I dropped-in ActionBarSherlock 4.2 into my project. I got everything to work, except the search suggestions for my SearchView. The way I was creating search suggestions was using the method in the Android documentation.
Does ActionBarSherlock support search suggestions? I tried to dig through the issue list on the Github page but the issue seems closed but I can't seem to follow the discussion and understand whether it really is a resolved or not. I thought that some of you who've been using ActionBarSherlock might know better.
It doesn't. But I have found a way to make it query your ContentProvider. I looked into the source of SuggestionsAdapter from API 17 where the query executes and got an idea of replacing this method. Also I found that ActionbarSherlock's SuggestionsAdapter does not use your SearchableInfo.
Edit com.actionbarsherlock.widget.SuggestionsAdapter in your ActionBarSherlock project:
Add a line
private SearchableInfo searchable;
in constructor, add
this.searchable = mSearchable;
Replace getSuggestions method with this one:
public Cursor getSuggestions(String query, int limit) {
if (searchable == null) {
return null;
}
String authority = searchable.getSuggestAuthority();
if (authority == null) {
return null;
}
Uri.Builder uriBuilder = new Uri.Builder()
.scheme(ContentResolver.SCHEME_CONTENT)
.authority(authority)
.query("") // TODO: Remove, workaround for a bug in Uri.writeToParcel()
.fragment(""); // TODO: Remove, workaround for a bug in Uri.writeToParcel()
// if content path provided, insert it now
final String contentPath = searchable.getSuggestPath();
if (contentPath != null) {
uriBuilder.appendEncodedPath(contentPath);
}
// append standard suggestion query path
uriBuilder.appendPath(SearchManager.SUGGEST_URI_PATH_QUERY);
// get the query selection, may be null
String selection = searchable.getSuggestSelection();
// inject query, either as selection args or inline
String[] selArgs = null;
if (selection != null) { // use selection if provided
selArgs = new String[] { query };
} else { // no selection, use REST pattern
uriBuilder.appendPath(query);
}
if (limit > 0) {
uriBuilder.appendQueryParameter("limit", String.valueOf(limit));
}
Uri uri = uriBuilder.build();
// finally, make the query
return mContext.getContentResolver().query(uri, null, selection, selArgs, null);
}
Now it queries my ContentProvider but crashes with default adapter saying that no layout_height loading some xml file from support library. So you have to use custom SuggestionsAdapter. This is what worked for me:
import com.actionbarsherlock.widget.SearchView;
import android.app.SearchManager;
import android.app.SearchableInfo;
import android.content.ContentResolver;
import android.content.Context;
import android.database.Cursor;
import android.net.Uri;
import android.support.v4.widget.CursorAdapter;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
public final class DrugsSearchAdapter extends CursorAdapter
{
private static final int QUERY_LIMIT = 50;
private LayoutInflater inflater;
private SearchView searchView;
private SearchableInfo searchable;
public DrugsSearchAdapter(Context context, SearchableInfo info, SearchView searchView)
{
super(context, null, CursorAdapter.FLAG_REGISTER_CONTENT_OBSERVER);
this.searchable = info;
this.searchView = searchView;
this.inflater = LayoutInflater.from(context);
}
@Override
public void bindView(View v, Context context, Cursor c)
{
String name = c.getString(c.getColumnIndex(SearchManager.SUGGEST_COLUMN_TEXT_1));
TextView namet = (TextView) v.findViewById(R.id.list_item_drug_name);
namet.setText(name);
String man = c.getString(c.getColumnIndex(SearchManager.SUGGEST_COLUMN_TEXT_2));
TextView manuf = (TextView) v.findViewById(R.id.list_item_drug_manufacturer);
manuf.setText(man);
}
@Override
public View newView(Context arg0, Cursor arg1, ViewGroup arg2)
{
return this.inflater.inflate(R.layout.list_item_drug_search, null);
}
/**
* Use the search suggestions provider to obtain a live cursor. This will be called
* in a worker thread, so it's OK if the query is slow (e.g. round trip for suggestions).
* The results will be processed in the UI thread and changeCursor() will be called.
*/
@Override
public Cursor runQueryOnBackgroundThread(CharSequence constraint) {
String query = (constraint == null) ? "" : constraint.toString();
/**
* for in app search we show the progress spinner until the cursor is returned with
* the results.
*/
Cursor cursor = null;
if (searchView.getVisibility() != View.VISIBLE
|| searchView.getWindowVisibility() != View.VISIBLE) {
return null;
}
try {
cursor = getSuggestions(searchable, query, QUERY_LIMIT);
// trigger fill window so the spinner stays up until the results are copied over and
// closer to being ready
if (cursor != null) {
cursor.getCount();
return cursor;
}
} catch (RuntimeException e) {
}
// If cursor is null or an exception was thrown, stop the spinner and return null.
// changeCursor doesn't get called if cursor is null
return null;
}
public Cursor getSuggestions(SearchableInfo searchable, String query, int limit) {
if (searchable == null) {
return null;
}
String authority = searchable.getSuggestAuthority();
if (authority == null) {
return null;
}
Uri.Builder uriBuilder = new Uri.Builder()
.scheme(ContentResolver.SCHEME_CONTENT)
.authority(authority)
.query("")
.fragment("");
// if content path provided, insert it now
final String contentPath = searchable.getSuggestPath();
if (contentPath != null) {
uriBuilder.appendEncodedPath(contentPath);
}
// append standard suggestion query path
uriBuilder.appendPath(SearchManager.SUGGEST_URI_PATH_QUERY);
// get the query selection, may be null
String selection = searchable.getSuggestSelection();
// inject query, either as selection args or inline
String[] selArgs = null;
if (selection != null) { // use selection if provided
selArgs = new String[] { query };
} else { // no selection, use REST pattern
uriBuilder.appendPath(query);
}
if (limit > 0) {
uriBuilder.appendQueryParameter("limit", String.valueOf(limit));
}
Uri uri = uriBuilder.build();
// finally, make the query
return mContext.getContentResolver().query(uri, null, selection, selArgs, null);
}
}
And set this adapter in SearchView
searchView.setSuggestionsAdapter(new DrugsSearchAdapter(this, searchManager.getSearchableInfo(getComponentName()), searchView));