Prompt to install Orbot if selected in account preferences.

res/values/account_editor.xml

@@ -114,6 +114,8 @@
     <string name="account_proxy_port">Proxy port</string>
     <string name="account_proxy_user">Proxy user</string>
     <string name="account_proxy_password">Proxy password</string>
+    <string name="orbot_required_title">Install Orbot?</string>
+    <string name="orbot_required_message">In order to process using TOR you must have Orbot installed and activated to proxy traffic through it. Would you like to install it from Google Play?</string>
     <!-- http://dl.dropbox.com/u/1029995/com.xabber.android/account_editor_02.png -->
     <string name="account_sasl">Use SASL Authentication (recommended)</string>
     <!-- http://dl.dropbox.com/u/1029995/com.xabber.android/account_editor_02.png -->

src/com/xabber/android/ui/AccountEditor.java

@@ -33,7 +33,9 @@ import com.xabber.android.data.account.ArchiveMode;
 import com.xabber.android.data.connection.ProxyType;
 import com.xabber.android.data.connection.TLSMode;
 import com.xabber.android.data.intent.AccountIntentBuilder;
+import com.xabber.android.ui.dialog.OrbotInstallerDialogBuilder;
 import com.xabber.android.ui.helper.BaseSettingsActivity;
+import com.xabber.android.ui.helper.OrbotHelper;
 import com.xabber.androiddev.R;
 
 public class AccountEditor extends BaseSettingsActivity implements
@@ -45,6 +47,8 @@ public class AccountEditor extends BaseSettingsActivity implements
 
 	private static final String INVALIDATED_TOKEN = "com.xabber.android.ui.AccountEditor.INVALIDATED";
 
+	private static final int ORBOT_DIALOG_ID = 9050;
+
 	private String account;
 	private AccountItem accountItem;
 
@@ -242,6 +246,12 @@ public class AccountEditor extends BaseSettingsActivity implements
 	@Override
 	protected boolean setValues(Map<String, Object> source,
 			Map<String, Object> result) {
+		ProxyType proxyType = ProxyType.values()[getInt(result,
+				R.string.account_proxy_type_key)];
+		if (proxyType == ProxyType.orbot && !OrbotHelper.isOrbotInstalled()) {
+			showDialog(ORBOT_DIALOG_ID);
+			return false;
+		}
 		AccountManager
 				.getInstance()
 				.updateAccount(
@@ -260,8 +270,7 @@ public class AccountEditor extends BaseSettingsActivity implements
 						TLSMode.values()[getInt(result,
 								R.string.account_tls_mode_key)],
 						getBoolean(result, R.string.account_compression_key),
-						ProxyType.values()[getInt(result,
-								R.string.account_proxy_type_key)],
+						proxyType,
 						getString(result, R.string.account_proxy_host_key),
 						getInt(result, R.string.account_proxy_port_key),
 						getString(result, R.string.account_proxy_user_key),
@@ -272,6 +281,15 @@ public class AccountEditor extends BaseSettingsActivity implements
 		return true;
 	}
 
+	@Override
+	protected Dialog onCreateDialog(int id) {
+		if (id == ORBOT_DIALOG_ID) {
+			return new OrbotInstallerDialogBuilder(this, ORBOT_DIALOG_ID)
+					.create();
+		}
+		return super.onCreateDialog(id);
+	}
+
 	private static String getAccount(Intent intent) {
 		return AccountIntentBuilder.getAccount(intent);
 	}

src/com/xabber/android/ui/dialog/OrbotInstallerDialogBuilder.java

+/**
+ * Copyright (c) 2013, Redsolution LTD. All rights reserved.
+ * 
+ * This file is part of Xabber project; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License, Version 3.
+ * 
+ * Xabber 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, see http://www.gnu.org/licenses/.
+ */
+package com.xabber.android.ui.dialog;
+
+import android.app.Activity;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.net.Uri;
+
+import com.xabber.android.ui.helper.OrbotHelper;
+import com.xabber.androiddev.R;
+
+/**
+ * Orbot installer dialog builder.
+ * 
+ * @author alexander.ivanov
+ * 
+ */
+public class OrbotInstallerDialogBuilder extends DialogBuilder {
+
+	private final static String MARKET_SEARCH = "market://search?q=pname:%s";
+
+	public OrbotInstallerDialogBuilder(final Activity activity, int dialogId) {
+		super(activity, dialogId);
+		setIcon(android.R.drawable.ic_dialog_alert);
+		setTitle(R.string.orbot_required_title);
+		setMessage(R.string.orbot_required_message);
+		setPositiveButton(android.R.string.yes,
+				new DialogInterface.OnClickListener() {
+					@Override
+					public void onClick(DialogInterface dialog, int w) {
+						Uri uri = Uri.parse(String.format(MARKET_SEARCH,
+								OrbotHelper.URI_ORBOT));
+						Intent intent = new Intent(Intent.ACTION_VIEW, uri);
+						activity.startActivity(intent);
+					}
+				});
+		setNegativeButton(android.R.string.no, null);
+	}
+
+}

src/com/xabber/android/ui/helper/OrbotHelper.java

+/**
+ * Copyright (c) 2013, Redsolution LTD. All rights reserved.
+ * 
+ * This file is part of Xabber project; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License, Version 3.
+ * 
+ * Xabber 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, see http://www.gnu.org/licenses/.
+ */
+package com.xabber.android.ui.helper;
+
+import android.content.pm.PackageManager;
+
+import com.xabber.android.data.Application;
+
+public class OrbotHelper {
+
+	public final static String URI_ORBOT = "org.torproject.android";
+
+	public static boolean isOrbotInstalled() {
+		PackageManager packageManager = Application.getInstance()
+				.getPackageManager();
+		try {
+			packageManager.getPackageInfo(URI_ORBOT,
+					PackageManager.GET_ACTIVITIES);
+			return true;
+		} catch (PackageManager.NameNotFoundException e) {
+			return false;
+		}
+	}
+
+}