Android Studio - Complete Android Apps Tutorial – Account Manager - Day 23 - 9.02

Account Manager
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 Account Manager  A Centralized repository for storing user credentials  Permissions in Android Manifest  “android.permission.GET_ACCOUNTS”  Access the list of accounts  “android.permission.ACCOUNT_MANAGER”  Manage OAuth2 authentication  “android.permission.USE_CREDENTIALS”  Request an Auth Token
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 Accounts in Settings
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 AccountManager is obtained with AccountManager am = AccountManager.getMainActivity.this;  A list of accounts is obtained with Account[] accounts = am.getAccounts; forAccount account:accounts String name = account.name; String type = account.type;
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 Account Type examples  Google: com.google  Dropbox: com.dropbox.android.account  Facebook: com.facebook.auth.login  Twitter: com.twitter.android.auth.login  Yahoo: com.yahoo.mobile.client.share.account  LinkedIn: com.linkedin.android  Outlook: com.outlook.Z7.eas  GitHub: com.github
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 Request an Auth Token final AccountManager am = AccountManager.getthis;  Call getAuthToken in another Thread or AsyncTask  The 2nd parameter is the authTokenType and cl is for Calendar Data API am.getAuthTokenaccount, "cl", null, MainActivity.this, callback, null;
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 Request an Auth Token
AccountManagerCallbackBundle callback = new AccountManagerCallbackBundle @Override public void runAccountManagerFutureBundle future // obtain the token in the run method
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 Request an Auth Token // obtain the token in the run method Bundle bundle = future.getResult; if bundle.containsKey AccountManager.KEY_AUTHTOKEN String authToken = future.getResult .getStringAccountManager.KEY_AUTHTOKEN;
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 Request an Auth Token
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Device Policy Manager
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 Device Administration API  Allow an App to control the security level of the device  Allow an App to detect security issues such as multiple failed password attempts  Allow an App to run utilities that are extremely useful when the device is compromised  Lock the device  Reset the password  Wipe the device  Allow an App to disable cameras
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 Device Administrators metadata XML resource ?xml version="1.0" encoding="utf-8"? device-admin xmlns:android="http://schemas.android.com/apk/res/andr oid" uses-policies force-lock / /uses-policies /device-admin
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 Device Administrators uses-policies  disable-camera / - disable the cameras  encrypted-storage / - ask the user to encrypt the device storage  expire-password / - set an expiration time of password  force-lock / - lock the device  limit-password / - set criteria for password quality  reset-password / - reset the password  watch-login / - monitor login attempts  wipe-data / - wipe the device
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 DeviceAdminReceiver  Subclass of DeviceAdminReceiver is required to exist as a Application component  No method is required to be overridden  Methods that can be overridden  onPasswordFailedContext, Intent  onPasswordExpiringContext, Intent
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 DeviceAdminReceiver subclass in Android Manifest receiver android:name="AdminReceiver" android:permission= "android.permission.BIND_DEVICE_ADMIN" meta-data android:name="android.app.device_admin" android:resource="@xml/device_admin" / intent-filter action android:name= "android.app.action.DEVICE_ADMIN_ENABLED" / /intent-filter /receiver
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 DeviceAdminReceiver subclass in Android Manifest  Only Apps hold the BIND_DEVICE_ADMIN permission can send the broadcast which are only signed with firmware's signing key.  meta-data resource point to the device_admin.xml  Listen to “android.app.action.DEVICE_ADMIN_ENABLED” to notify failed logins or other events

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 Implementation of Device Administration in Activity  cn is the Component Name of the subclass of the DeviceAdminReceiver  mgr is the DevicePolicyManager cn = new ComponentNamethis, AdminReceiver.class; mgr = DevicePolicyManagergetSystemService Context.DEVICE_POLICY_SERVICE;
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 Enable Device Administration if!mgr.isAdminActivecn Intent i = new IntentDevicePolicyManager. ACTION_ADD_DEVICE_ADMIN; i.putExtraDevicePolicyManager. EXTRA_DEVICE_ADMIN, cn; i.putExtraDevicePolicyManager. EXTRA_ADD_EXPLANATION, "Testing Remote Lock"; startActivityi;
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 Enable Device Administration
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 Lock the phone similar to pressing the power button if Device Administration is enabled
ifmgr.isAdminActivecn mgr.lockNow;
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 Check Device Administration in Settings → Security → Device administrators
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Download Manager
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 DownloadManager  Handles long-running HTTP downloads  Introduced in Android 2.3 API Level 9  Requires the permission “android.permission.INTERNET” “android.permission.WRITE_EXTERNAL_STORAGE”  Handles retrying after failures or across connectivity changes between WiFi and 3G