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      1 /*
      2  * Copyright (C) 2012 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.settings.accounts;
     18 
     19 import android.accounts.Account;
     20 import android.accounts.AccountManager;
     21 import android.accounts.AuthenticatorDescription;
     22 import android.content.Context;
     23 import android.content.pm.PackageManager;
     24 import android.content.res.Resources;
     25 import android.graphics.drawable.Drawable;
     26 import android.os.AsyncTask;
     27 import android.util.Log;
     28 
     29 import java.util.ArrayList;
     30 import java.util.HashMap;
     31 import java.util.Map;
     32 
     33 public class AuthenticatorHelper {
     34 
     35     private static final String TAG = "AuthenticatorHelper";
     36     private Map<String, AuthenticatorDescription> mTypeToAuthDescription
     37             = new HashMap<String, AuthenticatorDescription>();
     38     private AuthenticatorDescription[] mAuthDescs;
     39     private ArrayList<String> mEnabledAccountTypes = new ArrayList<String>();
     40     private Map<String, Drawable> mAccTypeIconCache = new HashMap<String, Drawable>();
     41 
     42     public AuthenticatorHelper() {
     43     }
     44 
     45     public String[] getEnabledAccountTypes() {
     46         return mEnabledAccountTypes.toArray(new String[mEnabledAccountTypes.size()]);
     47     }
     48 
     49     public void preloadDrawableForType(final Context context, final String accountType) {
     50         new AsyncTask<Void, Void, Void>() {
     51             @Override
     52             protected Void doInBackground(Void... params) {
     53                 getDrawableForType(context, accountType);
     54                 return null;
     55             }
     56         }.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, (Void[]) null);
     57     }
     58 
     59     /**
     60      * Gets an icon associated with a particular account type. If none found, return null.
     61      * @param accountType the type of account
     62      * @return a drawable for the icon or null if one cannot be found.
     63      */
     64     public Drawable getDrawableForType(Context context, final String accountType) {
     65         Drawable icon = null;
     66         synchronized (mAccTypeIconCache) {
     67             if (mAccTypeIconCache.containsKey(accountType)) {
     68                 return mAccTypeIconCache.get(accountType);
     69             }
     70         }
     71         if (mTypeToAuthDescription.containsKey(accountType)) {
     72             try {
     73                 AuthenticatorDescription desc = mTypeToAuthDescription.get(accountType);
     74                 Context authContext = context.createPackageContext(desc.packageName, 0);
     75                 icon = authContext.getResources().getDrawable(desc.iconId);
     76                 synchronized (mAccTypeIconCache) {
     77                     mAccTypeIconCache.put(accountType, icon);
     78                 }
     79             } catch (PackageManager.NameNotFoundException e) {
     80             } catch (Resources.NotFoundException e) {
     81             }
     82         }
     83         if (icon == null) {
     84             icon = context.getPackageManager().getDefaultActivityIcon();
     85         }
     86         return icon;
     87     }
     88 
     89     /**
     90      * Gets the label associated with a particular account type. If none found, return null.
     91      * @param accountType the type of account
     92      * @return a CharSequence for the label or null if one cannot be found.
     93      */
     94     public CharSequence getLabelForType(Context context, final String accountType) {
     95         CharSequence label = null;
     96         if (mTypeToAuthDescription.containsKey(accountType)) {
     97             try {
     98                 AuthenticatorDescription desc = mTypeToAuthDescription.get(accountType);
     99                 Context authContext = context.createPackageContext(desc.packageName, 0);
    100                 label = authContext.getResources().getText(desc.labelId);
    101             } catch (PackageManager.NameNotFoundException e) {
    102                 Log.w(TAG, "No label name for account type " + accountType);
    103             } catch (Resources.NotFoundException e) {
    104                 Log.w(TAG, "No label icon for account type " + accountType);
    105             }
    106         }
    107         return label;
    108     }
    109 
    110     /**
    111      * Updates provider icons. Subclasses should call this in onCreate()
    112      * and update any UI that depends on AuthenticatorDescriptions in onAuthDescriptionsUpdated().
    113      */
    114     public void updateAuthDescriptions(Context context) {
    115         mAuthDescs = AccountManager.get(context).getAuthenticatorTypes();
    116         for (int i = 0; i < mAuthDescs.length; i++) {
    117             mTypeToAuthDescription.put(mAuthDescs[i].type, mAuthDescs[i]);
    118         }
    119     }
    120 
    121     public void onAccountsUpdated(Context context, Account[] accounts) {
    122         if (accounts == null) {
    123             accounts = AccountManager.get(context).getAccounts();
    124         }
    125         mEnabledAccountTypes.clear();
    126         mAccTypeIconCache.clear();
    127         for (Account account: accounts) {
    128             if (!mEnabledAccountTypes.contains(account.type)) {
    129                 mEnabledAccountTypes.add(account.type);
    130             }
    131         }
    132     }
    133 
    134     public boolean containsAccountType(String accountType) {
    135         return mTypeToAuthDescription.containsKey(accountType);
    136     }
    137 
    138     public AuthenticatorDescription getAccountTypeDescription(String accountType) {
    139         return mTypeToAuthDescription.get(accountType);
    140     }
    141 
    142     public boolean hasAccountPreferences(final String accountType) {
    143         if (containsAccountType(accountType)) {
    144             AuthenticatorDescription desc = getAccountTypeDescription(accountType);
    145             if (desc != null && desc.accountPreferencesId != 0) {
    146                 return true;
    147             }
    148         }
    149         return false;
    150     }
    151 }
    152