1 /* 2 * Copyright (C) 2015 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License 15 */ 16 17 package com.android.settingslib.accounts; 18 19 import android.accounts.Account; 20 import android.accounts.AccountManager; 21 import android.accounts.AuthenticatorDescription; 22 import android.content.BroadcastReceiver; 23 import android.content.ContentResolver; 24 import android.content.Context; 25 import android.content.Intent; 26 import android.content.IntentFilter; 27 import android.content.SyncAdapterType; 28 import android.content.pm.PackageManager; 29 import android.content.res.Resources; 30 import android.graphics.drawable.Drawable; 31 import android.os.AsyncTask; 32 import android.os.UserHandle; 33 import android.util.Log; 34 35 import java.util.ArrayList; 36 import java.util.HashMap; 37 import java.util.Map; 38 39 /** 40 * Helper class for monitoring accounts on the device for a given user. 41 * 42 * Classes using this helper should implement {@link OnAccountsUpdateListener}. 43 * {@link OnAccountsUpdateListener#onAccountsUpdate(UserHandle)} will then be 44 * called once accounts get updated. For setting up listening for account 45 * updates, {@link #listenToAccountUpdates()} and 46 * {@link #stopListeningToAccountUpdates()} should be used. 47 */ 48 final public class AuthenticatorHelper extends BroadcastReceiver { 49 private static final String TAG = "AuthenticatorHelper"; 50 51 private final Map<String, AuthenticatorDescription> mTypeToAuthDescription = new HashMap<>(); 52 private final ArrayList<String> mEnabledAccountTypes = new ArrayList<>(); 53 private final Map<String, Drawable> mAccTypeIconCache = new HashMap<>(); 54 private final HashMap<String, ArrayList<String>> mAccountTypeToAuthorities = new HashMap<>(); 55 56 private final UserHandle mUserHandle; 57 private final Context mContext; 58 private final OnAccountsUpdateListener mListener; 59 private boolean mListeningToAccountUpdates; 60 61 public interface OnAccountsUpdateListener { 62 void onAccountsUpdate(UserHandle userHandle); 63 } 64 65 public AuthenticatorHelper(Context context, UserHandle userHandle, 66 OnAccountsUpdateListener listener) { 67 mContext = context; 68 mUserHandle = userHandle; 69 mListener = listener; 70 // This guarantees that the helper is ready to use once constructed: the account types and 71 // authorities are initialized 72 onAccountsUpdated(null); 73 } 74 75 public String[] getEnabledAccountTypes() { 76 return mEnabledAccountTypes.toArray(new String[mEnabledAccountTypes.size()]); 77 } 78 79 public void preloadDrawableForType(final Context context, final String accountType) { 80 new AsyncTask<Void, Void, Void>() { 81 @Override 82 protected Void doInBackground(Void... params) { 83 getDrawableForType(context, accountType); 84 return null; 85 } 86 }.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, (Void[]) null); 87 } 88 89 /** 90 * Gets an icon associated with a particular account type. If none found, return null. 91 * @param accountType the type of account 92 * @return a drawable for the icon or a default icon returned by 93 * {@link PackageManager#getDefaultActivityIcon} if one cannot be found. 94 */ 95 public Drawable getDrawableForType(Context context, final String accountType) { 96 Drawable icon = null; 97 synchronized (mAccTypeIconCache) { 98 if (mAccTypeIconCache.containsKey(accountType)) { 99 return mAccTypeIconCache.get(accountType); 100 } 101 } 102 if (mTypeToAuthDescription.containsKey(accountType)) { 103 try { 104 AuthenticatorDescription desc = mTypeToAuthDescription.get(accountType); 105 Context authContext = context.createPackageContextAsUser(desc.packageName, 0, 106 mUserHandle); 107 icon = mContext.getPackageManager().getUserBadgedIcon( 108 authContext.getDrawable(desc.iconId), mUserHandle); 109 synchronized (mAccTypeIconCache) { 110 mAccTypeIconCache.put(accountType, icon); 111 } 112 } catch (PackageManager.NameNotFoundException|Resources.NotFoundException e) { 113 // Ignore 114 } 115 } 116 if (icon == null) { 117 icon = context.getPackageManager().getDefaultActivityIcon(); 118 } 119 return icon; 120 } 121 122 /** 123 * Gets the label associated with a particular account type. If none found, return null. 124 * @param accountType the type of account 125 * @return a CharSequence for the label or null if one cannot be found. 126 */ 127 public CharSequence getLabelForType(Context context, final String accountType) { 128 CharSequence label = null; 129 if (mTypeToAuthDescription.containsKey(accountType)) { 130 try { 131 AuthenticatorDescription desc = mTypeToAuthDescription.get(accountType); 132 Context authContext = context.createPackageContextAsUser(desc.packageName, 0, 133 mUserHandle); 134 label = authContext.getResources().getText(desc.labelId); 135 } catch (PackageManager.NameNotFoundException e) { 136 Log.w(TAG, "No label name for account type " + accountType); 137 } catch (Resources.NotFoundException e) { 138 Log.w(TAG, "No label icon for account type " + accountType); 139 } 140 } 141 return label; 142 } 143 144 /** 145 * Gets the package associated with a particular account type. If none found, return null. 146 * @param accountType the type of account 147 * @return the package name or null if one cannot be found. 148 */ 149 public String getPackageForType(final String accountType) { 150 if (mTypeToAuthDescription.containsKey(accountType)) { 151 AuthenticatorDescription desc = mTypeToAuthDescription.get(accountType); 152 return desc.packageName; 153 } 154 return null; 155 } 156 157 /** 158 * Gets the resource id of the label associated with a particular account type. If none found, 159 * return -1. 160 * @param accountType the type of account 161 * @return a resource id for the label or -1 if none found; 162 */ 163 public int getLabelIdForType(final String accountType) { 164 if (mTypeToAuthDescription.containsKey(accountType)) { 165 AuthenticatorDescription desc = mTypeToAuthDescription.get(accountType); 166 return desc.labelId; 167 } 168 return -1; 169 } 170 171 /** 172 * Updates provider icons. Subclasses should call this in onCreate() 173 * and update any UI that depends on AuthenticatorDescriptions in onAuthDescriptionsUpdated(). 174 */ 175 public void updateAuthDescriptions(Context context) { 176 AuthenticatorDescription[] authDescs = AccountManager.get(context) 177 .getAuthenticatorTypesAsUser(mUserHandle.getIdentifier()); 178 for (int i = 0; i < authDescs.length; i++) { 179 mTypeToAuthDescription.put(authDescs[i].type, authDescs[i]); 180 } 181 } 182 183 public boolean containsAccountType(String accountType) { 184 return mTypeToAuthDescription.containsKey(accountType); 185 } 186 187 public AuthenticatorDescription getAccountTypeDescription(String accountType) { 188 return mTypeToAuthDescription.get(accountType); 189 } 190 191 public boolean hasAccountPreferences(final String accountType) { 192 if (containsAccountType(accountType)) { 193 AuthenticatorDescription desc = getAccountTypeDescription(accountType); 194 if (desc != null && desc.accountPreferencesId != 0) { 195 return true; 196 } 197 } 198 return false; 199 } 200 201 void onAccountsUpdated(Account[] accounts) { 202 updateAuthDescriptions(mContext); 203 if (accounts == null) { 204 accounts = AccountManager.get(mContext).getAccountsAsUser(mUserHandle.getIdentifier()); 205 } 206 mEnabledAccountTypes.clear(); 207 mAccTypeIconCache.clear(); 208 for (int i = 0; i < accounts.length; i++) { 209 final Account account = accounts[i]; 210 if (!mEnabledAccountTypes.contains(account.type)) { 211 mEnabledAccountTypes.add(account.type); 212 } 213 } 214 buildAccountTypeToAuthoritiesMap(); 215 if (mListeningToAccountUpdates) { 216 mListener.onAccountsUpdate(mUserHandle); 217 } 218 } 219 220 @Override 221 public void onReceive(final Context context, final Intent intent) { 222 // TODO: watch for package upgrades to invalidate cache; see http://b/7206643 223 final Account[] accounts = AccountManager.get(mContext) 224 .getAccountsAsUser(mUserHandle.getIdentifier()); 225 onAccountsUpdated(accounts); 226 } 227 228 public void listenToAccountUpdates() { 229 if (!mListeningToAccountUpdates) { 230 IntentFilter intentFilter = new IntentFilter(); 231 intentFilter.addAction(AccountManager.LOGIN_ACCOUNTS_CHANGED_ACTION); 232 // At disk full, certain actions are blocked (such as writing the accounts to storage). 233 // It is useful to also listen for recovery from disk full to avoid bugs. 234 intentFilter.addAction(Intent.ACTION_DEVICE_STORAGE_OK); 235 mContext.registerReceiverAsUser(this, mUserHandle, intentFilter, null, null); 236 mListeningToAccountUpdates = true; 237 } 238 } 239 240 public void stopListeningToAccountUpdates() { 241 if (mListeningToAccountUpdates) { 242 mContext.unregisterReceiver(this); 243 mListeningToAccountUpdates = false; 244 } 245 } 246 247 public ArrayList<String> getAuthoritiesForAccountType(String type) { 248 return mAccountTypeToAuthorities.get(type); 249 } 250 251 private void buildAccountTypeToAuthoritiesMap() { 252 mAccountTypeToAuthorities.clear(); 253 SyncAdapterType[] syncAdapters = ContentResolver.getSyncAdapterTypesAsUser( 254 mUserHandle.getIdentifier()); 255 for (int i = 0, n = syncAdapters.length; i < n; i++) { 256 final SyncAdapterType sa = syncAdapters[i]; 257 ArrayList<String> authorities = mAccountTypeToAuthorities.get(sa.accountType); 258 if (authorities == null) { 259 authorities = new ArrayList<String>(); 260 mAccountTypeToAuthorities.put(sa.accountType, authorities); 261 } 262 if (Log.isLoggable(TAG, Log.VERBOSE)) { 263 Log.v(TAG, "Added authority " + sa.authority + " to accountType " 264 + sa.accountType); 265 } 266 authorities.add(sa.authority); 267 } 268 } 269 } 270
