SearchableActivity.java

package org.openintents.filemanager.search;

import org.openintents.filemanager.FileManagerActivity;
import org.openintents.filemanager.R;
import org.openintents.filemanager.compatibility.HomeIconHelper;
import org.openintents.filemanager.util.UIUtils;
import org.openintents.intents.FileManagerIntents;

import android.app.ListActivity;
import android.app.SearchManager;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.database.Cursor;
import android.database.CursorWrapper;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.provider.SearchRecentSuggestions;
import android.support.v4.content.LocalBroadcastManager;
import android.view.MenuItem;
import android.view.View;
import android.view.Window;
import android.widget.ListView;

/**
 * The activity that handles queries and shows search results. 
 * Also handles search-suggestion triggered intents.
 * 
 * @author George Venios
 * 
 */
public class SearchableActivity extends ListActivity {
	private LocalBroadcastManager lbm;
	private Cursor searchResults;
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		UIUtils.setThemeFor(this);
		
		// Presentation settings
		requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
		super.onCreate(savedInstanceState);
		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
			HomeIconHelper.activity_actionbar_setDisplayHomeAsUpEnabled(this);
		}

		lbm = LocalBroadcastManager.getInstance(getApplicationContext());
		
		// Handle the search request.
		handleIntent();
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		switch (item.getItemId()) {
		case android.R.id.home:
			HomeIconHelper.showHome(this);
			break;
		}
		return super.onOptionsItemSelected(item);
	}

	@Override
	protected void onNewIntent(Intent intent) {
		setIntent(intent);
		handleIntent();
	}

	private void handleIntent() {
		Intent intent = getIntent();
		if (Intent.ACTION_SEARCH.equals(intent.getAction())) {
			// Get the query.
			String query = intent.getStringExtra(SearchManager.QUERY);
			setTitle(query);

			// Get the current path, which allows us to refine the search.
			String path = null;
			if (intent.getBundleExtra(SearchManager.APP_DATA) != null)
				path = intent.getBundleExtra(SearchManager.APP_DATA).getString(
						FileManagerIntents.EXTRA_SEARCH_INIT_PATH);

			// Add query to recents.
			SearchRecentSuggestions suggestions = new SearchRecentSuggestions(
					this, RecentsSuggestionsProvider.AUTHORITY,
					RecentsSuggestionsProvider.MODE);
			suggestions.saveRecentQuery(query, null);

			// Register broadcast receivers
			lbm.registerReceiver(new BroadcastReceiver() {
				@Override
				public void onReceive(Context context, Intent intent) {
					setProgressBarIndeterminateVisibility(false);
				}
			}, new IntentFilter(FileManagerIntents.ACTION_SEARCH_FINISHED));
			
			lbm.registerReceiver(new BroadcastReceiver() {
				@Override
				public void onReceive(Context context, Intent intent) {
					setProgressBarIndeterminateVisibility(true);
				}
			}, new IntentFilter(FileManagerIntents.ACTION_SEARCH_STARTED));
			
			// Set the list adapter.
			searchResults = getSearchResults();
			setListAdapter(new SearchListAdapter(this, searchResults));
			
			// Start the search service.
			Intent in = new Intent(this, SearchService.class);
			in.putExtra(FileManagerIntents.EXTRA_SEARCH_INIT_PATH, path);
			in.putExtra(FileManagerIntents.EXTRA_SEARCH_QUERY, query);
			startService(in);
		} // We're here because of a clicked suggestion
		else if(Intent.ACTION_VIEW.equals(intent.getAction())){
			browse(intent.getData());
		}
		else
			// Intent contents error.
			setTitle(R.string.query_error);
	}

	@Override
	protected void onDestroy() {
		super.onDestroy();
		
		stopService(new Intent(this, SearchService.class));
	}
	
	/**
	 * Clear the recents' history.
	 */
	public static void clearSearchRecents(Context c) {
		SearchRecentSuggestions suggestions = new SearchRecentSuggestions(c,
				RecentsSuggestionsProvider.AUTHORITY,
				RecentsSuggestionsProvider.MODE);
		suggestions.clearHistory();
	}

	private Cursor getSearchResults() {
		return getContentResolver().query(SearchResultsProvider.CONTENT_URI, null, null, null, SearchResultsProvider.COLUMN_ID + " ASC");
	}
	
	@Override
	protected void onListItemClick(ListView l, View v, int position, long id) {
		Cursor c = new CursorWrapper(searchResults);
		c.moveToPosition(position);
		String path = c.getString(c.getColumnIndex(SearchResultsProvider.COLUMN_PATH));
		
		browse(Uri.parse(path));
	}

	private void browse(Uri path) {
		Intent intent = new Intent(this, FileManagerActivity.class);
		intent.setFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP | Intent.FLAG_ACTIVITY_CLEAR_TOP);
		intent.setData(path);
		
		startActivity(intent);
		finish();
	}
}