FilePickerHelper.java

/* 
 * Copyright 2010-2013 Eric Kok et al.
 * 
 * Transdroid is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * Transdroid is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with Transdroid.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.transdroid.core.gui.search;

import org.transdroid.R;

import android.annotation.SuppressLint;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.DialogFragment;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.content.Intent;
import android.net.Uri;

public class FilePickerHelper {

	public static final int ACTIVITY_FILEPICKER = 0x0000c0df; // A 'random' ID to identify file picker intents
	public static final Uri FILEMANAGER_MARKET_URI = Uri.parse("market://search?q=pname:org.openintents.filemanager");

	/**
	 * Call this to start a file picker intent. The calling activity will receive an Intent result with ID
	 * {@link #ACTIVITY_FILEPICKER} with an Intent that contains the selected local file as data Intent.
	 * @param activity The calling activity, to which the result is returned or a dialog is bound that asks to install
	 *            the file picker
	 */
	@SuppressLint("ValidFragment")
	public static void startFilePicker(final Activity activity) {
		try {
			// Start a file manager that can handle the file/* file/* intents
			activity.startActivityForResult(new Intent(Intent.ACTION_GET_CONTENT).setType("file/*"),
					ACTIVITY_FILEPICKER);
		} catch (Exception e1) {
			try {
				// Start a file manager that can handle the PICK_FILE intent (specifically IO File Manager)
				activity.startActivityForResult(new Intent("org.openintents.action.PICK_FILE"), ACTIVITY_FILEPICKER);
			} catch (Exception e2) {
				// Can't start the file manager, for example with a SecurityException or when IO File Manager is not
				// present
				new DialogFragment() {
					public android.app.Dialog onCreateDialog(android.os.Bundle savedInstanceState) {
						return new AlertDialog.Builder(activity).setIcon(android.R.drawable.ic_dialog_alert)
								.setMessage(activity.getString(R.string.search_filemanagernotfound))
								.setPositiveButton(android.R.string.yes, new OnClickListener() {
									@Override
									public void onClick(DialogInterface dialog, int which) {
										if (activity != null)
											activity.startActivity(new Intent(Intent.ACTION_VIEW,
													FILEMANAGER_MARKET_URI));
									}
								}).setNegativeButton(android.R.string.no, null).create();
					};
				}.show(activity.getFragmentManager(), "installfilemanager");
			}
		}
	}

}