Change clearing app cookies method.

src/main/java/org/amahi/anywhere/activity/ServerAppActivity.java

@@ -36,6 +36,7 @@
 import org.amahi.anywhere.server.model.ServerApp;
 import org.amahi.anywhere.util.Android;
 import org.amahi.anywhere.util.Intents;
+import org.amahi.anywhere.util.Preferences;
 import org.amahi.anywhere.util.ViewDirector;
 
 import java.util.Locale;
@@ -54,13 +55,30 @@ protected void onCreate(Bundle savedInstanceState) {
 
 		setUpInjections();
 
+		setUpAppHistory();
 		setUpApp(savedInstanceState);
 	}
 
 	private void setUpInjections() {
 		AmahiApplication.from(this).inject(this);
 	}
 
+	private void setUpAppHistory() {
+		String previousAppHost = Preferences.with(this).getLatestOpenedAppHost();
+		String currentAppHost = getApp().getHost();
+
+		if (!previousAppHost.equals(currentAppHost)) {
+			tearDownAppState();
+		}
+	}
+
+	private void tearDownAppState() {
+		CookieSyncManager.createInstance(this);
+
+		CookieManager cookieManager = CookieManager.getInstance();
+		cookieManager.removeAllCookie();
+	}
+
 	private void setUpApp(Bundle state) {
 		setUpAppWebAgent();
 		setUpAppWebClient();
@@ -186,16 +204,14 @@ protected void onDestroy() {
 		getWebView().destroy();
 
 		if (isFinishing()) {
-			tearDownAppWebViewState();
+			tearDownAppHistory();
 		}
 	}
 
-	private void tearDownAppWebViewState() {
-		CookieSyncManager.createInstance(this);
+	private void tearDownAppHistory() {
+		String currentAppHost = getApp().getHost();
 
-		CookieManager cookieManager = CookieManager.getInstance();
-
-		cookieManager.removeAllCookie();
+		Preferences.with(this).setLatestOpenedAppHost(currentAppHost);
 	}
 
 	private static final class AppWebClient extends WebViewClient

src/main/java/org/amahi/anywhere/util/Preferences.java

@@ -0,0 +1,76 @@
+/*
+ * Copyright (c) 2014 Amahi
+ *
+ * This file is part of Amahi.
+ *
+ * Amahi 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.
+ *
+ * Amahi 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 Amahi. If not, see <http ://www.gnu.org/licenses/>.
+ */
+
+package org.amahi.anywhere.util;
+
+import android.content.Context;
+import android.content.SharedPreferences;
+
+public final class Preferences
+{
+	private static final class Locations
+	{
+		private Locations() {
+		}
+
+		public static final String STATE = "state";
+	}
+
+	private static final class Keys
+	{
+		private Keys() {
+		}
+
+		public static final String LATEST_OPENED_APP_HOST = "latest_opened_app_host";
+	}
+
+	private static final class Defaults
+	{
+		private Defaults() {
+		}
+
+		public static final String STRING = "";
+	}
+
+	private final SharedPreferences preferences;
+
+	public static Preferences with(Context context) {
+		return new Preferences(context);
+	}
+
+	private Preferences(Context context) {
+		this.preferences = context.getSharedPreferences(Locations.STATE, Context.MODE_PRIVATE);
+	}
+
+	public String getLatestOpenedAppHost() {
+		return getString(Keys.LATEST_OPENED_APP_HOST);
+	}
+
+	private String getString(String key) {
+		return preferences.getString(key, Defaults.STRING);
+	}
+
+	public void setLatestOpenedAppHost(String appHost) {
+		setString(Keys.LATEST_OPENED_APP_HOST, appHost);
+	}
+
+	private void setString(String key, String value) {
+		preferences.edit().putString(key, value).apply();
+	}
+}