ResetActivity.java

package edu.mit.mobile.android.locast.ver2.browser;
/*
 * Copyright (C) 2011  MIT Mobile Experience Lab
 *
 * This program 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 2
 * of the License, or (at your option) any later version.
 *
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */

import java.io.File;

import android.accounts.Account;
import android.accounts.AccountManager;
import android.app.Activity;
import android.content.ContentResolver;
import android.content.Context;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Toast;
import edu.mit.mobile.android.locast.Constants;
import edu.mit.mobile.android.locast.accounts.Authenticator;
import edu.mit.mobile.android.locast.data.Cast;
import edu.mit.mobile.android.locast.data.Comment;
import edu.mit.mobile.android.locast.data.Event;
import edu.mit.mobile.android.locast.data.Itinerary;
import edu.mit.mobile.android.locast.data.MediaProvider;
import edu.mit.mobile.android.locast.ver2.R;

public class ResetActivity extends Activity implements OnClickListener {
	private static final String TAG = ResetActivity.class.getSimpleName();

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.reset_activity);

		ContentResolver.cancelSync(Authenticator.getFirstAccount(this), MediaProvider.AUTHORITY);

		findViewById(R.id.reset).setOnClickListener(this);
		findViewById(R.id.cancel).setOnClickListener(this);
	}

	@Override
	public void onClick(View v) {
		switch (v.getId()) {
		case R.id.reset:
				resetEverything(this, true, true);
			setResult(RESULT_OK);
			finish();
			break;

		case R.id.cancel:
			setResult(RESULT_CANCELED);
			finish();
			break;
		}
	}

	public static void resetEverything(Context context, boolean showNotice, boolean removeAccounts) {
		if (Constants.DEBUG) {
			Log.d(TAG, "erasing all data...");
		}

		if (removeAccounts) {
			final AccountManager am = (AccountManager) context.getSystemService(ACCOUNT_SERVICE);

			for (final Account account : Authenticator.getAccounts(context)) {
				am.removeAccount(account, null, null);
			}
		}

		// clear cache
		for (final File file : context.getCacheDir().listFiles()) {
			file.delete();
		}

		final ContentResolver cr = context.getContentResolver();

		cr.delete(Cast.CONTENT_URI, null, null);
		cr.delete(Comment.CONTENT_URI, null, null);
		cr.delete(Event.CONTENT_URI, null, null);
		cr.delete(Itinerary.CONTENT_URI, null, null);

		if (showNotice) {
			Toast.makeText(context.getApplicationContext(), R.string.notice_databases_reset,
					Toast.LENGTH_LONG).show();
		}
		if (Constants.DEBUG) {
			Log.d(TAG, "All Locast data has been erased.");
		}
	}
}