1 files changed, 81 insertions, 0 deletions
diff --git a/java/src/org/kelar/inputmethod/latin/accounts/AccountsChangedReceiver.java b/java/src/org/kelar/inputmethod/latin/accounts/AccountsChangedReceiver.java
new file mode 100644
index 000000000..e6ca1f606
--- /dev/null
+++ b/java/src/org/kelar/inputmethod/latin/accounts/AccountsChangedReceiver.java
@@ -0,0 +1,81 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.kelar.inputmethod.latin.accounts;
+
+import android.accounts.AccountManager;
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.SharedPreferences;
+import android.preference.PreferenceManager;
+import android.text.TextUtils;
+import android.util.Log;
+
+import org.kelar.inputmethod.annotations.UsedForTesting;
+import org.kelar.inputmethod.latin.settings.LocalSettingsConstants;
+
+/**
+ * {@link BroadcastReceiver} for {@link AccountManager#LOGIN_ACCOUNTS_CHANGED_ACTION}.
+ */
+public class AccountsChangedReceiver extends BroadcastReceiver {
+    static final String TAG = "AccountsChangedReceiver";
+
+    @Override
+    public void onReceive(Context context, Intent intent) {
+        if (!AccountManager.LOGIN_ACCOUNTS_CHANGED_ACTION.equals(intent.getAction())) {
+            Log.w(TAG, "Received unknown broadcast: " + intent);
+            return;
+        }
+
+        // Ideally the account preference could live in a different preferences file
+        // that wasn't being backed up and restored, however the preference fragments
+        // currently only deal with the default shared preferences which is why
+        // separating this out into a different file is not trivial currently.
+        final SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
+        final String currentAccount = prefs.getString(
+                LocalSettingsConstants.PREF_ACCOUNT_NAME, null);
+        removeUnknownAccountFromPreference(prefs, getAccountsForLogin(context), currentAccount);
+    }
+
+    /**
+     * Helper method to help test this receiver.
+     */
+    @UsedForTesting
+    protected String[] getAccountsForLogin(Context context) {
+        return LoginAccountUtils.getAccountsForLogin(context);
+    }
+
+    /**
+     * Removes the currentAccount from preferences if it's not found
+     * in the list of current accounts.
+     */
+    private static void removeUnknownAccountFromPreference(final SharedPreferences prefs,
+            final String[] accounts, final String currentAccount) {
+        if (currentAccount == null) {
+            return;
+        }
+        for (final String account : accounts) {
+            if (TextUtils.equals(currentAccount, account)) {
+                return;
+            }
+        }
+        Log.i(TAG, "The current account was removed from the system: " + currentAccount);
+        prefs.edit()
+                .remove(LocalSettingsConstants.PREF_ACCOUNT_NAME)
+                .apply();
+    }
+}