1 /* 2 * Copyright (C) 2016 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.tv.util; 18 19 import android.accounts.Account; 20 import android.content.Context; 21 import android.content.SharedPreferences; 22 import android.os.RemoteException; 23 import android.preference.PreferenceManager; 24 import android.support.annotation.Nullable; 25 import android.util.Log; 26 27 28 import java.util.Arrays; 29 30 /** 31 * Helper methods for getting and selecting a user account. 32 */ 33 public class AccountHelper { 34 private static final String TAG = "AccountHelper"; 35 private static final boolean DEBUG = false; 36 private static final String SELECTED_ACCOUNT = "android.tv.livechannels.selected_account"; 37 38 private final Context mContext; 39 private final SharedPreferences mDefaultPreferences; 40 41 @Nullable 42 private Account mSelectedAccount; 43 AccountHelper(Context context)44 public AccountHelper(Context context) { 45 mContext = context.getApplicationContext(); 46 mDefaultPreferences = PreferenceManager.getDefaultSharedPreferences(mContext); 47 } 48 49 /** 50 * Returns the currently selected account or {@code null} if none is selected. 51 */ 52 @Nullable getSelectedAccount()53 public Account getSelectedAccount() { 54 String accountId = mDefaultPreferences.getString(SELECTED_ACCOUNT, null); 55 if (accountId == null) { 56 return null; 57 } 58 if (mSelectedAccount == null || !mSelectedAccount.name.equals((accountId))) { 59 mSelectedAccount = null; 60 for (Account account : getEligibleAccounts()) { 61 if (account.name.equals(accountId)) { 62 mSelectedAccount = account; 63 break; 64 } 65 } 66 } 67 return mSelectedAccount; 68 } 69 70 /** 71 * Returns all eligible accounts . 72 */ getEligibleAccounts()73 private Account[] getEligibleAccounts() { 74 return new Account[0]; 75 } 76 77 /** 78 * Selects the first account available. 79 * 80 * @return selected account or {@code null} if none is selected. 81 */ 82 @Nullable selectFirstAccount()83 public Account selectFirstAccount() { 84 Account account = getFirstEligibleAccount(); 85 if (account != null) { 86 selectAccount(account); 87 } 88 return account; 89 } 90 91 /** 92 * Gets the first account eligible. 93 * 94 * @return first account or {@code null} if none is eligible. 95 */ 96 @Nullable getFirstEligibleAccount()97 public Account getFirstEligibleAccount() { 98 Account[] accounts = getEligibleAccounts(); 99 return accounts.length == 0 ? null : accounts[0]; 100 } 101 102 /** 103 * Sets the given account as the selected account. 104 */ selectAccount(Account account)105 private void selectAccount(Account account) { 106 SharedPreferences defaultPreferences = PreferenceManager 107 .getDefaultSharedPreferences(mContext); 108 defaultPreferences.edit().putString(SELECTED_ACCOUNT, account.name).commit(); 109 } 110 } 111 112