Add BT message access

+ List available email accounts
+ Allow for turning each account on/off with switches--making the message content available to bluetooth devices that can read emails (like cars)

Bug: 15720425

Change-Id: Ia0c91c1e74a2644fc99a8b902c42212453d8f86e

src/com/android/settings/bluetooth/MessageAccessSettings.java

@@ -0,0 +1,166 @@
+/*
+ * 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 com.android.settings.bluetooth;
+
+import android.accounts.Account;
+import android.accounts.AccountManager;
+import android.app.ActivityManagerNative;
+import android.content.Context;
+import android.content.pm.PackageManager.NameNotFoundException;
+import android.graphics.drawable.Drawable;
+import android.os.Bundle;
+import android.os.UserHandle;
+import android.preference.SwitchPreference;
+import android.preference.Preference;
+import android.preference.PreferenceGroup;
+import android.preference.PreferenceScreen;
+import android.provider.SearchIndexableResource;
+import android.util.Log;
+
+import com.android.settings.accounts.AuthenticatorHelper;
+import com.android.settings.R;
+import com.android.settings.SettingsPreferenceFragment;
+import com.android.settings.Utils;
+import com.android.settings.search.BaseSearchIndexProvider;
+import com.android.settings.search.Indexable;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class MessageAccessSettings extends SettingsPreferenceFragment
+        implements AuthenticatorHelper.OnAccountsUpdateListener, Indexable {
+    private static final String TAG = "MessageAccessSettings";
+    private static final String GMAIL_PACKAGE_NAME = "com.google.android.gm";
+    private static final String EMAIL_PACKAGE_NAME = "com.google.android.email";
+
+    private Account[] mAccounts;
+    private UserHandle mUserHandle;
+    private PreferenceGroup mAvailableAccounts;
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        mUserHandle = Utils.getProfileToDisplay(ActivityManagerNative.getDefault(),
+                getActivity().getActivityToken(), savedInstanceState);
+
+        addPreferencesFromResource(R.xml.bluetooth_message_access);
+    }
+
+    @Override
+    public void onResume() {
+        super.onResume();
+        initPreferences();
+    }
+
+    @Override
+    public void onAccountsUpdate(final UserHandle userHandle) {
+        mAccounts = AccountManager.get(getActivity()).getAccountsAsUser(
+                mUserHandle.getIdentifier());
+
+        final int mAccountsSize = mAccounts.length;
+        for (int i = 0; i < mAccountsSize; ++i){
+            Log.d(TAG, String.format("account.type = %s\n", mAccounts[i].type));
+        }
+    }
+
+    /**
+     * Retrieves the email icon for a given account's email preference
+     *
+     * @param accountPref The user's account to retrieve the icon from.
+     *
+     * @return The drawable representing the icon of the user's email preference
+     **/
+    private Drawable getIcon(AccountPreference accountPref){
+        Drawable icon = null;
+
+        // Currently only two types of icons are allowed.
+        final String packageName = accountPref.account.type.equals("com.google")
+                ? GMAIL_PACKAGE_NAME : EMAIL_PACKAGE_NAME;
+
+        try{
+            icon = getPackageManager().getApplicationIcon(packageName);
+        }catch(NameNotFoundException nnfe){
+            icon = null;
+        }
+
+        return icon;
+    }
+
+    private void initPreferences() {
+        final PreferenceScreen preferenceScreen = getPreferenceScreen();
+        mAvailableAccounts = (PreferenceGroup)preferenceScreen.findPreference("accounts");
+        mAccounts = AccountManager.get(getActivity()).getAccountsAsUser(
+                mUserHandle.getIdentifier());
+
+        final int mAccountsSize = mAccounts.length;
+        for (int i = 0; i < mAccountsSize; ++i){
+            AccountPreference accountPref = new AccountPreference(getActivity(), mAccounts[i]);
+            Drawable icon = getIcon(accountPref);
+            if (icon != null){
+                accountPref.setIcon(icon);
+            }
+            mAvailableAccounts.addPreference(accountPref);
+        }
+    }
+
+    private class AccountPreference extends SwitchPreference
+            implements Preference.OnPreferenceChangeListener{
+        private Account account;
+
+        AccountPreference(Context context, Account account){
+            super(context);
+            this.account = account;
+            setTitle(account.type);
+            setSummary(account.name);
+
+            setOnPreferenceChangeListener(this);
+        }
+
+        @Override
+        public boolean onPreferenceChange(Preference preference, Object val) {
+            if (preference instanceof AccountPreference){
+                final AccountPreference accountPref = (AccountPreference) preference;
+
+                if (((Boolean)val).booleanValue()){
+                    // Enable paired deviced to connect, fill in once API is available
+                    Log.w(TAG, String.format(
+                                "User has turned on '%s' for Bluetooth message access.",
+                                accountPref.account.name));
+                } else {
+                    // Disable paired deviced to connect, fill in once API is available
+                    Log.w(TAG, String.format(
+                                "User has turned off '%s' for Bluetooth message access.",
+                                accountPref.account.name));
+                }
+            }
+            return true;
+        }
+    }
+
+    public static final SearchIndexProvider SEARCH_INDEX_DATA_PROVIDER =
+        new BaseSearchIndexProvider() {
+            @Override
+            public List<SearchIndexableResource> getXmlResourcesToIndex(
+                    Context context, boolean enabled) {
+                List<SearchIndexableResource> indexables = new ArrayList<SearchIndexableResource>();
+                SearchIndexableResource indexable = new SearchIndexableResource(context);
+                indexable.xmlResId = R.xml.bluetooth_message_access;
+                indexables.add(indexable);
+                return indexables;
+            }
+        };
+}